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A 4-Year Retrospective : Lessons Learned from Building a Video Player from Scratch with React Native
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Aug 6, 2025
Join me for a 4-year retrospective as we explore the lessons learned from building a video player from scratch with React Native. I'll share insights, pitfalls, and key takeaways from this development journey. We'll explore essential considerations before diving into custom video player development with React Native, including challenges like background audio management, platform nuances between Android and iOS, subtitles implementation and custom controls. Whether you're a seasoned developer or new to React Native, this retrospective will help you navigate the challenges we faced when developing a video player, ensuring a smoother development process for your own projects. š Conference Website: https://reactandchill.live š Code of Conduct: https://reactandchill.live/code-of-co... šŗ CSharp TV - Dev Streaming Destination http://csharp.tv š C# Corner - Community of Software and Data Developers https://www.c-sharpcorner.com #CSharpTV #CSharpCorner #CSharp #dotNet #ReactAndChill
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0:03
hello everyone and it's nice to to be
0:05
hello everyone and it's nice to to be
0:05
hello everyone and it's nice to to be here and I know I I always wanted to
0:08
here and I know I I always wanted to
0:08
here and I know I I always wanted to share this topic with with people
0:09
share this topic with with people
0:09
share this topic with with people because I find it pretty interesting
0:12
because I find it pretty interesting
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because I find it pretty interesting because it's kind of a niche topic
0:14
because it's kind of a niche topic
0:14
because it's kind of a niche topic because no we are not so used to develop
0:16
because no we are not so used to develop
0:16
because no we are not so used to develop video platforms with react especially
0:19
video platforms with react especially
0:19
video platforms with react especially with react native so without further Ado
0:21
with react native so without further Ado
0:21
with react native so without further Ado let's start and welcome to the store
0:23
let's start and welcome to the store
0:23
let's start and welcome to the store which is a fouryear retrospective in
0:25
which is a fouryear retrospective in
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which is a fouryear retrospective in building a video player from scratch
0:27
building a video player from scratch
0:27
building a video player from scratch with react native but before starting we
0:30
with react native but before starting we
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with react native but before starting we I wanted to State what is a
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I wanted to State what is a
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I wanted to State what is a retrospective because I would love to
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retrospective because I would love to
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retrospective because I would love to structure this talk as a pure
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structure this talk as a pure
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structure this talk as a pure retrospective a retrospective I looked
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retrospective a retrospective I looked
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retrospective a retrospective I looked for the definition and I came across
0:41
for the definition and I came across
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for the definition and I came across this one which is a retrospective is a
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this one which is a retrospective is a
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this one which is a retrospective is a chance for a team to reflect and learn
0:45
chance for a team to reflect and learn
0:45
chance for a team to reflect and learn from the past without structured meeting
0:47
from the past without structured meeting
0:47
from the past without structured meeting so uh in terms of retrospective we
0:50
so uh in terms of retrospective we
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so uh in terms of retrospective we intend a meeting or a session in which
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intend a meeting or a session in which
0:53
intend a meeting or a session in which we take a look at what we did so all the
0:56
we take a look at what we did so all the
0:56
we take a look at what we did so all the good things we did in a project all the
0:58
good things we did in a project all the
0:58
good things we did in a project all the bad things we did so what didn't go well
1:01
bad things we did so what didn't go well
1:01
bad things we did so what didn't go well we come out with some action items and
1:04
we come out with some action items and
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we come out with some action items and some possible solution so a
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some possible solution so a
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some possible solution so a retrospective is an occasion for every
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retrospective is an occasion for every
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retrospective is an occasion for every team to look back reflect to the past
1:10
team to look back reflect to the past
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team to look back reflect to the past and move on improving the product
1:12
and move on improving the product
1:12
and move on improving the product because I love working in product in in
1:15
because I love working in product in in
1:15
because I love working in product in in so I'm technically lead in this company
1:17
so I'm technically lead in this company
1:17
so I'm technically lead in this company which is called learn and I am a
1:19
which is called learn and I am a
1:19
which is called learn and I am a software engineer which is very very
1:21
software engineer which is very very
1:21
software engineer which is very very pass which is very very passionate about
1:23
pass which is very very passionate about
1:23
pass which is very very passionate about product development so everything around
1:25
product development so everything around
1:25
product development so everything around product uh marketing uh design UI ux I
1:29
product uh marketing uh design UI ux I
1:29
product uh marketing uh design UI ux I love this kind kind of stuffs so uh I
1:31
love this kind kind of stuffs so uh I
1:31
love this kind kind of stuffs so uh I always focus it on product development
1:33
always focus it on product development
1:33
always focus it on product development and this is a product which was born a
1:36
and this is a product which was born a
1:36
and this is a product which was born a lot of time ago for years which is a
1:38
lot of time ago for years which is a
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lot of time ago for years which is a startup we did found in 2020 in Italy
1:41
startup we did found in 2020 in Italy
1:41
startup we did found in 2020 in Italy but I will talk about it later so what
1:44
but I will talk about it later so what
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but I will talk about it later so what we going to see today we are going to
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we going to see today we are going to
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we going to see today we are going to see a project overview so the project of
1:49
see a project overview so the project of
1:49
see a project overview so the project of the application we will take a look at
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the application we will take a look at
1:51
the application we will take a look at what went well during the development
1:53
what went well during the development
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what went well during the development process we are going to take a look at
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process we are going to take a look at
1:55
process we are going to take a look at what didn't go well which is in my
1:57
what didn't go well which is in my
1:57
what didn't go well which is in my opinion the most important part of the
1:59
opinion the most important part of the
1:59
opinion the most important part of the the talk then we will move on to the
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the talk then we will move on to the
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the talk then we will move on to the lessons learned to hopefully save you
2:03
lessons learned to hopefully save you
2:03
lessons learned to hopefully save you some errors that I I've done in the past
2:05
some errors that I I've done in the past
2:05
some errors that I I've done in the past while developing it and we will after
2:08
while developing it and we will after
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while developing it and we will after review all the action items so all the
2:10
review all the action items so all the
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review all the action items so all the stuff that we we can do to improve the
2:12
stuff that we we can do to improve the
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stuff that we we can do to improve the product and to keep achieving uh uh
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product and to keep achieving uh uh
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product and to keep achieving uh uh Flawless development and so let's start
2:17
Flawless development and so let's start
2:17
Flawless development and so let's start with a project overview learn is a
2:20
with a project overview learn is a
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with a project overview learn is a startup as I said before which was born
2:22
startup as I said before which was born
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startup as I said before which was born in 2020 in Italy uh it was bootstrapped
2:25
in 2020 in Italy uh it was bootstrapped
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in 2020 in Italy uh it was bootstrapped without founding and the main product is
2:28
without founding and the main product is
2:28
without founding and the main product is a video platform so we are video
2:29
a video platform so we are video
2:29
a video platform so we are video streaming services which offer a lot of
2:32
streaming services which offer a lot of
2:32
streaming services which offer a lot of uh digital marketing courses
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uh digital marketing courses
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uh digital marketing courses advertisement courses so the goal is to
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advertisement courses so the goal is to
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advertisement courses so the goal is to make digital competences accessible to
2:39
make digital competences accessible to
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make digital competences accessible to everyone which everyone so the main
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everyone which everyone so the main
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everyone which everyone so the main language of the platform is in Italian
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language of the platform is in Italian
2:44
language of the platform is in Italian we are only in the Italy Market but
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we are only in the Italy Market but
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we are only in the Italy Market but since we launch we reach 170,000 plus
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since we launch we reach 170,000 plus
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since we launch we reach 170,000 plus users we have 350 and plus courses and
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users we have 350 and plus courses and
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users we have 350 and plus courses and this is a premium model it means that
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this is a premium model it means that
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this is a premium model it means that you can uh register for free to the
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you can uh register for free to the
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you can uh register for free to the platform and then purchase subscription
3:00
platform and then purchase subscription
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platform and then purchase subscription to watch all the content because you can
3:02
to watch all the content because you can
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to watch all the content because you can watch the 30% of the content and then if
3:04
watch the 30% of the content and then if
3:04
watch the 30% of the content and then if you want to watch more you have to pay
3:07
you want to watch more you have to pay
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you want to watch more you have to pay uh the service which is 90 which is $10
3:09
uh the service which is 90 which is $10
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uh the service which is 90 which is $10 a month so it's quite low as a price the
3:12
a month so it's quite low as a price the
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a month so it's quite low as a price the main product is the web application but
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main product is the web application but
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main product is the web application but we still have the mobile application
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we still have the mobile application
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we still have the mobile application this was the first version of the mobile
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this was the first version of the mobile
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this was the first version of the mobile application in 2020 it was kind of an
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application in 2020 it was kind of an
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application in 2020 it was kind of an MVP as you can see on the right we
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MVP as you can see on the right we
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MVP as you can see on the right we couldn't even scroll the the timeline on
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couldn't even scroll the the timeline on
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couldn't even scroll the the timeline on the video but we built the application
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the video but we built the application
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the video but we built the application from scratch so it was made with react
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from scratch so it was made with react
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from scratch so it was made with react native and with react native video which
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native and with react native video which
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native and with react native video which is a popular library for video managing
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is a popular library for video managing
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is a popular library for video managing in react so the player currently is this
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in react so the player currently is this
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in react so the player currently is this we have a lot of
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features you can watch transcripts of
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features you can watch transcripts of
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features you can watch transcripts of the less so the transcript as lesson
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the less so the transcript as lesson
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the less so the transcript as lesson goes on follow follow
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what lot fun sub titles and these were
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what lot fun sub titles and these were
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what lot fun sub titles and these were functions that we implemented um
4:00
functions that we implemented um
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functions that we implemented um in in following years so in four years
4:03
in in following years so in four years
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in in following years so in four years and this was made entirely from scratch
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and this was made entirely from scratch
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and this was made entirely from scratch with react native video as I said before
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with react native video as I said before
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with react native video as I said before at the moment of uh speaking is 6.4
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at the moment of uh speaking is 6.4
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at the moment of uh speaking is 6.4 version but now the first version was
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version but now the first version was
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version but now the first version was 5.2.1 we used custom components so
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5.2.1 we used custom components so
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5.2.1 we used custom components so without external libraries we did
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without external libraries we did
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without external libraries we did everything from scratch and we use an
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everything from scratch and we use an
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everything from scratch and we use an open source Library which is Rec native
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open source Library which is Rec native
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open source Library which is Rec native bottom sheet to display all the bottom
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bottom sheet to display all the bottom
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bottom sheet to display all the bottom part and it works uh quite well on
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part and it works uh quite well on
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part and it works uh quite well on Android and iOS and and so we will move
4:31
Android and iOS and and so we will move
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Android and iOS and and so we will move on to see even this one this part which
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on to see even this one this part which
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on to see even this one this part which is the bottom sheet in which you can
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is the bottom sheet in which you can
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is the bottom sheet in which you can insert and it has a lot of animations
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insert and it has a lot of animations
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insert and it has a lot of animations but the main topic we are talking about
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but the main topic we are talking about
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but the main topic we are talking about is the video so we will see now what
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is the video so we will see now what
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is the video so we will see now what went well during the development process
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went well during the development process
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went well during the development process so what went well was the streaming
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so what went well was the streaming
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so what went well was the streaming which hls so all the streaming part
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which hls so all the streaming part
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which hls so all the streaming part because I forgot to say to you that we
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because I forgot to say to you that we
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because I forgot to say to you that we developed from scratch even the
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developed from scratch even the
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developed from scratch even the streaming infrastructure so we don't use
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streaming infrastructure so we don't use
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streaming infrastructure so we don't use or YouTube but we have a custom
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or YouTube but we have a custom
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or YouTube but we have a custom infrastructure built on AWS uh we went
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infrastructure built on AWS uh we went
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infrastructure built on AWS uh we went well the subtile TOs and transcripts
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well the subtile TOs and transcripts
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well the subtile TOs and transcripts part as you said before and the iOS
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part as you said before and the iOS
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part as you said before and the iOS performance because it was quite good on
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performance because it was quite good on
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performance because it was quite good on iOS this is the hls streaming so we use
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iOS this is the hls streaming so we use
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iOS this is the hls streaming so we use a custom infrastructure built on AWS
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a custom infrastructure built on AWS
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a custom infrastructure built on AWS that I've done another talk on this
5:13
that I've done another talk on this
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that I've done another talk on this topic so if you want to go to my website
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topic so if you want to go to my website
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topic so if you want to go to my website and check it out I will explain
5:17
and check it out I will explain
5:17
and check it out I will explain everything about building a complete
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everything about building a complete
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everything about building a complete infrastructure for video streaming on
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infrastructure for video streaming on
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infrastructure for video streaming on AWS uh so what do you have to say you
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AWS uh so what do you have to say you
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AWS uh so what do you have to say you have to know since we're talking about
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have to know since we're talking about
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have to know since we're talking about react is that the ban gives to you these
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react is that the ban gives to you these
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react is that the ban gives to you these URLs which are the playlist of the video
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URLs which are the playlist of the video
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URLs which are the playlist of the video that you can pass to the player so the
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that you can pass to the player so the
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that you can pass to the player so the the files are in m3u8 so this is the
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the files are in m3u8 so this is the
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the files are in m3u8 so this is the common file the hls playlist which
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common file the hls playlist which
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common file the hls playlist which adapts to the connection so if users say
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adapts to the connection so if users say
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adapts to the connection so if users say full connection the conect the the video
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full connection the conect the the video
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full connection the conect the the video will still go on but with uh reduced
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will still go on but with uh reduced
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will still go on but with uh reduced resolution so it adapts automatically to
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resolution so it adapts automatically to
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resolution so it adapts automatically to the device to the connection so this is
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the device to the connection so this is
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the device to the connection so this is independent of the connection we have a
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independent of the connection we have a
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independent of the connection we have a lot of
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lot of
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lot of outputs as you can see here even the MP3
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outputs as you can see here even the MP3
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outputs as you can see here even the MP3 output if you want to allow the users to
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output if you want to allow the users to
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output if you want to allow the users to watch to listen only to the audio but we
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watch to listen only to the audio but we
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watch to listen only to the audio but we use the hls URL so the playlist and this
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use the hls URL so the playlist and this
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use the hls URL so the playlist and this worked very well with all devices and
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worked very well with all devices and
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worked very well with all devices and all uh all different devices both on IOS
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all uh all different devices both on IOS
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all uh all different devices both on IOS and Android then we moved on to develop
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and Android then we moved on to develop
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and Android then we moved on to develop the subtitles and transcripts part so at
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the subtitles and transcripts part so at
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the subtitles and transcripts part so at the moment of uh when we developed at
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the moment of uh when we developed at
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the moment of uh when we developed at first in 2020 in Rec native video there
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first in 2020 in Rec native video there
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first in 2020 in Rec native video there was no there wasn't the possibility to
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was no there wasn't the possibility to
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was no there wasn't the possibility to style the subtitles and not you cannot
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style the subtitles and not you cannot
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style the subtitles and not you cannot position so as you can see on the right
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position so as you can see on the right
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position so as you can see on the right this was the default position that the
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this was the default position that the
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this was the default position that the player allowed to to to display the
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player allowed to to to display the
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player allowed to to to display the subtitle so we decided to develop a
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subtitle so we decided to develop a
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subtitle so we decided to develop a custom uh component which we didn't
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custom uh component which we didn't
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custom uh component which we didn't release yet but is internal we um we
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release yet but is internal we um we
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release yet but is internal we um we converted all subtitles in types and
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converted all subtitles in types and
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converted all subtitles in types and objects so as you can see on the left
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objects so as you can see on the left
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objects so as you can see on the left this is what comes out of the uh
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this is what comes out of the uh
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this is what comes out of the uh transcript so a vtt file which is a file
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transcript so a vtt file which is a file
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transcript so a vtt file which is a file that contains all the the quotes at a
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that contains all the the quotes at a
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that contains all the the quotes at a given time so for for instance on the
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given time so for for instance on the
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given time so for for instance on the first part you can see the first part uh
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first part you can see the first part uh
6:57
first part you can see the first part uh the the first sentence H it tells you
7:01
the the first sentence H it tells you
7:01
the the first sentence H it tells you when it is being pronounced then we
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when it is being pronounced then we
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when it is being pronounced then we translated this with the parser into a
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translated this with the parser into a
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translated this with the parser into a commonly type so which has an ID a start
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commonly type so which has an ID a start
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commonly type so which has an ID a start time a stop time the text that the
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time a stop time the text that the
7:11
time a stop time the text that the person is saying in the auor in this way
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person is saying in the auor in this way
7:14
person is saying in the auor in this way you can even uh you can do whatever you
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you can even uh you can do whatever you
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you can even uh you can do whatever you want with this kind of object you can
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want with this kind of object you can
7:18
want with this kind of object you can display it with a component and as you
7:20
display it with a component and as you
7:20
display it with a component and as you can see here we buil a custom hook which
7:23
can see here we buil a custom hook which
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can see here we buil a custom hook which uh takes uh two props one is subtitles
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uh takes uh two props one is subtitles
7:27
uh takes uh two props one is subtitles so the uh array of objects that I was
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so the uh array of objects that I was
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so the uh array of objects that I was shown you before and player proxy player
7:32
shown you before and player proxy player
7:32
shown you before and player proxy player proxy is the player itself so the hook
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proxy is the player itself so the hook
7:34
proxy is the player itself so the hook uses the player state to display the
7:36
uses the player state to display the
7:36
uses the player state to display the subtitles at the given time so if the
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subtitles at the given time so if the
7:38
subtitles at the given time so if the player has a given time of for instance
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player has a given time of for instance
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player has a given time of for instance 60 seconds and in the vtt at 60 seconds
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60 seconds and in the vtt at 60 seconds
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60 seconds and in the vtt at 60 seconds a quote is been pronounced we can
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a quote is been pronounced we can
7:45
a quote is been pronounced we can display and return the current block as
7:48
display and return the current block as
7:48
display and return the current block as you can see in the set block by time
7:49
you can see in the set block by time
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you can see in the set block by time function you get the current time the
7:51
function you get the current time the
7:51
function you get the current time the current index get current Q I didn't
7:54
current index get current Q I didn't
7:54
current index get current Q I didn't show you the function but is a function
7:56
show you the function but is a function
7:56
show you the function but is a function to find the current uh sentence that
7:58
to find the current uh sentence that
7:58
to find the current uh sentence that which is been based on the time and then
8:01
which is been based on the time and then
8:01
which is been based on the time and then you return the current block so you can
8:03
you return the current block so you can
8:03
you return the current block so you can display it whatever you want like this
8:05
display it whatever you want like this
8:05
display it whatever you want like this so you instance this hook which is you
8:07
so you instance this hook which is you
8:07
so you instance this hook which is you subtitles you pass the subtitle objects
8:10
subtitles you pass the subtitle objects
8:10
subtitles you pass the subtitle objects you pass the play proxy and you obtain
8:11
you pass the play proxy and you obtain
8:11
you pass the play proxy and you obtain the current block and you can insert it
8:13
the current block and you can insert it
8:13
the current block and you can insert it in a text and display it so if there's
8:15
in a text and display it so if there's
8:15
in a text and display it so if there's no current block the current block is
8:17
no current block the current block is
8:17
no current block the current block is not displayed so this is automatic and
8:19
not displayed so this is automatic and
8:19
not displayed so this is automatic and goes on very well even with the TR
8:21
goes on very well even with the TR
8:21
goes on very well even with the TR scripts as you can see here we can
8:23
scripts as you can see here we can
8:23
scripts as you can see here we can position wherever we want we can even on
8:25
position wherever we want we can even on
8:25
position wherever we want we can even on the web part we can use react dragable
8:28
the web part we can use react dragable
8:28
the web part we can use react dragable to drag the titles you can do whatever
8:30
to drag the titles you can do whatever
8:30
to drag the titles you can do whatever you want with these kind of transcripts
8:32
you want with these kind of transcripts
8:32
you want with these kind of transcripts and let's move on to the other part
8:34
and let's move on to the other part
8:34
and let's move on to the other part which is IOS performance as you can see
8:36
which is IOS performance as you can see
8:36
which is IOS performance as you can see here this is from Firebase um we have a
8:39
here this is from Firebase um we have a
8:39
here this is from Firebase um we have a pretty good performance on iOS because
8:41
pretty good performance on iOS because
8:41
pretty good performance on iOS because as you can see here the crash rate is
8:43
as you can see here the crash rate is
8:43
as you can see here the crash rate is quite low uh there are no uh exception
8:48
quite low uh there are no uh exception
8:48
quite low uh there are no uh exception or problems of any sort and it's very
8:50
or problems of any sort and it's very
8:50
or problems of any sort and it's very fluid the animation work very well the
8:52
fluid the animation work very well the
8:52
fluid the animation work very well the audio background works very well it
8:54
audio background works very well it
8:54
audio background works very well it means that you if you uh play a video
8:56
means that you if you uh play a video
8:56
means that you if you uh play a video and you close your phone and the the
8:58
and you close your phone and the the
8:58
and you close your phone and the the display shut down it keeps working the
9:00
display shut down it keeps working the
9:00
display shut down it keeps working the video is very smooth and the animations
9:02
video is very smooth and the animations
9:02
video is very smooth and the animations are very very smooth so this was the
9:05
are very very smooth so this was the
9:05
are very very smooth so this was the implementation on 2020 that moved on and
9:07
implementation on 2020 that moved on and
9:07
implementation on 2020 that moved on and had great performance but the most
9:10
had great performance but the most
9:10
had great performance but the most interesting part is this one what didn't
9:13
interesting part is this one what didn't
9:13
interesting part is this one what didn't go well so as you can see here in this
9:16
go well so as you can see here in this
9:16
go well so as you can see here in this funny picture there's the learn player
9:18
funny picture there's the learn player
9:18
funny picture there's the learn player and the name of this cute girl that
9:22
and the name of this cute girl that
9:22
and the name of this cute girl that destroyed our player was Android yeah
9:25
destroyed our player was Android yeah
9:25
destroyed our player was Android yeah Android was kind of a pain for us at
9:28
Android was kind of a pain for us at
9:28
Android was kind of a pain for us at first because in 20 uh react n video was
9:31
first because in 20 uh react n video was
9:31
first because in 20 uh react n video was not so supportive um because it was very
9:34
not so supportive um because it was very
9:34
not so supportive um because it was very very well maintained but given the
9:36
very well maintained but given the
9:36
very well maintained but given the majority of devices having different uh
9:39
majority of devices having different uh
9:39
majority of devices having different uh Hardwares didn't go well because we had
9:41
Hardwares didn't go well because we had
9:41
Hardwares didn't go well because we had some troubles and now I will explain you
9:43
some troubles and now I will explain you
9:43
some troubles and now I will explain you why so the first part was the Android
9:46
why so the first part was the Android
9:46
why so the first part was the Android player that didn't go well so the core
9:48
player that didn't go well so the core
9:48
player that didn't go well so the core player of the operating system then the
9:50
player of the operating system then the
9:50
player of the operating system then the audio background so when you lock your
9:53
audio background so when you lock your
9:53
audio background so when you lock your phone and you keep reproducing the video
9:55
phone and you keep reproducing the video
9:55
phone and you keep reproducing the video it was getting stun getting crashes and
9:57
it was getting stun getting crashes and
9:57
it was getting stun getting crashes and I will explain you later and and didn't
9:59
I will explain you later and and didn't
10:00
I will explain you later and and didn't go well even the part of the behaviors
10:02
go well even the part of the behaviors
10:02
go well even the part of the behaviors because between IOS and Android we had a
10:05
because between IOS and Android we had a
10:05
because between IOS and Android we had a lot of different behavior in different
10:07
lot of different behavior in different
10:07
lot of different behavior in different scenarios so let's see what we are
10:09
scenarios so let's see what we are
10:09
scenarios so let's see what we are talking about right now so Android uh
10:13
talking about right now so Android uh
10:13
talking about right now so Android uh natively uses two kind of player one is
10:16
natively uses two kind of player one is
10:16
natively uses two kind of player one is media player which is a public which is
10:17
media player which is a public which is
10:17
media player which is a public which is a class that allows you to reproduce
10:20
a class that allows you to reproduce
10:20
a class that allows you to reproduce audio but is pretty um it's the first
10:22
audio but is pretty um it's the first
10:22
audio but is pretty um it's the first class that we used because Rec native
10:25
class that we used because Rec native
10:25
class that we used because Rec native video was using this one in the first
10:26
video was using this one in the first
10:26
video was using this one in the first version and then there's exop player
10:28
version and then there's exop player
10:28
version and then there's exop player which is an Advanced version with more
10:30
which is an Advanced version with more
10:30
which is an Advanced version with more function and even more support which is
10:32
function and even more support which is
10:32
function and even more support which is more smooth and fluid but at first we
10:34
more smooth and fluid but at first we
10:34
more smooth and fluid but at first we did use media player because it came out
10:36
did use media player because it came out
10:36
did use media player because it came out of the box from react native video the
10:39
of the box from react native video the
10:39
of the box from react native video the library the first version had as I said
10:42
library the first version had as I said
10:42
library the first version had as I said to you a lot of problem it had distorted
10:44
to you a lot of problem it had distorted
10:44
to you a lot of problem it had distorted or missing audio the player was
10:46
or missing audio the player was
10:46
or missing audio the player was unresponsive we had buffering problems
10:48
unresponsive we had buffering problems
10:48
unresponsive we had buffering problems and and as you can see on the right it's
10:49
and and as you can see on the right it's
10:50
and and as you can see on the right it's written in Italian because this is a
10:51
written in Italian because this is a
10:51
written in Italian because this is a document that we used to map all the
10:53
document that we used to map all the
10:53
document that we used to map all the bags so we we uh asked a lot of our
10:56
bags so we we uh asked a lot of our
10:56
bags so we we uh asked a lot of our users to test the application and we
10:58
users to test the application and we
10:58
users to test the application and we collected all the feedback
10:59
collected all the feedback
10:59
collected all the feedback ranked with priority as you can see a
11:02
ranked with priority as you can see a
11:02
ranked with priority as you can see a lot of um the the first row is in
11:04
lot of um the the first row is in
11:04
lot of um the the first row is in Italian but it says the audio is not
11:06
Italian but it says the audio is not
11:06
Italian but it says the audio is not starting and 82 people had this problem
11:08
starting and 82 people had this problem
11:08
starting and 82 people had this problem so we wanted to tle this stuff and we
11:12
so we wanted to tle this stuff and we
11:12
so we wanted to tle this stuff and we looked for a solution for a lot of time
11:14
looked for a solution for a lot of time
11:14
looked for a solution for a lot of time until we found this solution which is
11:16
until we found this solution which is
11:16
until we found this solution which is two lines of code but these two lines of
11:18
two lines of code but these two lines of
11:18
two lines of code but these two lines of code took months to discover that this
11:20
code took months to discover that this
11:20
code took months to discover that this was the solution because the solution
11:22
was the solution because the solution
11:22
was the solution because the solution was to force the retive video library to
11:25
was to force the retive video library to
11:25
was to force the retive video library to use exop player which is the more
11:27
use exop player which is the more
11:27
use exop player which is the more advanced player but it was not written
11:29
advanced player but it was not written
11:29
advanced player but it was not written in the documentation so we did a PR to
11:31
in the documentation so we did a PR to
11:31
in the documentation so we did a PR to update the documentation we tested uh
11:34
update the documentation we tested uh
11:34
update the documentation we tested uh with rear users this new solution
11:36
with rear users this new solution
11:36
with rear users this new solution forcing Exel player the more performant
11:38
forcing Exel player the more performant
11:38
forcing Exel player the more performant player which is native we test it and we
11:40
player which is native we test it and we
11:40
player which is native we test it and we released a new version in production on
11:42
released a new version in production on
11:42
released a new version in production on the right can you see a list of emails
11:44
the right can you see a list of emails
11:44
the right can you see a list of emails that we sent to our user with with a lot
11:46
that we sent to our user with with a lot
11:46
that we sent to our user with with a lot of test cases that allow the user to
11:48
of test cases that allow the user to
11:48
of test cases that allow the user to test the application and give the
11:50
test the application and give the
11:50
test the application and give the feedback to us then we did this PR to
11:53
feedback to us then we did this PR to
11:53
feedback to us then we did this PR to update the uh the documentation in order
11:55
update the uh the documentation in order
11:55
update the uh the documentation in order to uh uh tell our users that we doing
11:59
to uh uh tell our users that we doing
11:59
to uh uh tell our users that we doing the same stuff to use this kind of uh
12:01
the same stuff to use this kind of uh
12:01
the same stuff to use this kind of uh player because it tooks it took a lot of
12:03
player because it tooks it took a lot of
12:03
player because it tooks it took a lot of months to discover this kind of solution
12:05
months to discover this kind of solution
12:05
months to discover this kind of solution and lot of tests but yeah we resoled it
12:08
and lot of tests but yeah we resoled it
12:08
and lot of tests but yeah we resoled it in this way the other part was the
12:10
in this way the other part was the
12:10
in this way the other part was the Android background audio because uh at
12:13
Android background audio because uh at
12:13
Android background audio because uh at first it it is supported by Rec native
12:15
first it it is supported by Rec native
12:15
first it it is supported by Rec native video so when you lock your phone Rec
12:17
video so when you lock your phone Rec
12:17
video so when you lock your phone Rec native video still works but there are
12:19
native video still works but there are
12:19
native video still works but there are no controls in the notification centers
12:22
no controls in the notification centers
12:22
no controls in the notification centers so this was the this it cannot display
12:25
so this was the this it cannot display
12:25
so this was the this it cannot display the control notification center you
12:26
the control notification center you
12:26
the control notification center you cannot control the video play see can
12:28
cannot control the video play see can
12:28
cannot control the video play see can stop the video
12:29
stop the video
12:29
stop the video the first solution that we that we
12:31
the first solution that we that we
12:31
the first solution that we that we adopted in 2020 was to use two players
12:34
adopted in 2020 was to use two players
12:34
adopted in 2020 was to use two players one was Rec native video with playing
12:36
one was Rec native video with playing
12:36
one was Rec native video with playing background Falls so we when you close
12:39
background Falls so we when you close
12:39
background Falls so we when you close the phone Rec native video stops then
12:41
the phone Rec native video stops then
12:41
the phone Rec native video stops then with the audio use another player which
12:43
with the audio use another player which
12:43
with the audio use another player which is Rec native track player which is uh a
12:46
is Rec native track player which is uh a
12:46
is Rec native track player which is uh a module that is used to play audio files
12:48
module that is used to play audio files
12:48
module that is used to play audio files and displays the notification controls
12:51
and displays the notification controls
12:51
and displays the notification controls but this solution involved listening if
12:53
but this solution involved listening if
12:54
but this solution involved listening if you're familiar with re native listening
12:55
you're familiar with re native listening
12:55
you're familiar with re native listening to a lot of changes in the upstate
12:57
to a lot of changes in the upstate
12:57
to a lot of changes in the upstate Upstate do other EV listener allowes you
13:00
Upstate do other EV listener allowes you
13:00
Upstate do other EV listener allowes you to listen when the app goes in
13:02
to listen when the app goes in
13:02
to listen when the app goes in background when when it is inactive so
13:05
background when when it is inactive so
13:05
background when when it is inactive so in this case when the app went in
13:06
in this case when the app went in
13:06
in this case when the app went in background we switch to the track player
13:09
background we switch to the track player
13:09
background we switch to the track player so to the audio when the app became
13:11
so to the audio when the app became
13:11
so to the audio when the app became active in the last row you can see that
13:12
active in the last row you can see that
13:13
active in the last row you can see that we switched to the video so it involved
13:15
we switched to the video so it involved
13:15
we switched to the video so it involved a lot of syns but um syncing two player
13:18
a lot of syns but um syncing two player
13:18
a lot of syns but um syncing two player is not a good choice because you have
13:20
is not a good choice because you have
13:20
is not a good choice because you have some lag you have some problems with the
13:22
some lag you have some problems with the
13:22
some lag you have some problems with the sync and synchronization of the time so
13:25
sync and synchronization of the time so
13:25
sync and synchronization of the time so it was not a good solution so we tried
13:27
it was not a good solution so we tried
13:27
it was not a good solution so we tried the second solution the the second
13:29
the second solution the the second
13:29
the second solution the the second solution was to use still the video but
13:31
solution was to use still the video but
13:31
solution was to use still the video but with playing backround through so to use
13:33
with playing backround through so to use
13:33
with playing backround through so to use as a play re native video and to the
13:36
as a play re native video and to the
13:36
as a play re native video and to the controls this kind of module which was
13:38
controls this kind of module which was
13:38
controls this kind of module which was Rec native music control which is a
13:40
Rec native music control which is a
13:40
Rec native music control which is a library that only displays the control
13:42
library that only displays the control
13:42
library that only displays the control notification center but it is not a
13:44
notification center but it is not a
13:44
notification center but it is not a player it's only a UI Library this
13:46
player it's only a UI Library this
13:46
player it's only a UI Library this worked well because uh we didn't have to
13:48
worked well because uh we didn't have to
13:48
worked well because uh we didn't have to listen to a lot of changes in the states
13:51
listen to a lot of changes in the states
13:51
listen to a lot of changes in the states on the right you can see how to instance
13:53
on the right you can see how to instance
13:53
on the right you can see how to instance music control as play ask up so you
13:55
music control as play ask up so you
13:55
music control as play ask up so you listen to the changes of the status of
13:57
listen to the changes of the status of
13:57
listen to the changes of the status of the player it's quite easy to import but
14:01
the player it's quite easy to import but
14:01
the player it's quite easy to import but it came with some problems because um so
14:05
it came with some problems because um so
14:05
it came with some problems because um so let's talk about the pros at first so we
14:07
let's talk about the pros at first so we
14:07
let's talk about the pros at first so we do you do you don't have load time
14:08
do you do you don't have load time
14:08
do you do you don't have load time between foreground and background so the
14:10
between foreground and background so the
14:10
between foreground and background so the switch is instant the screen is not
14:12
switch is instant the screen is not
14:12
switch is instant the screen is not rendered and you have native EV system
14:15
rendered and you have native EV system
14:15
rendered and you have native EV system management what what does it mean if I
14:17
management what what does it mean if I
14:17
management what what does it mean if I take out my uh earphone um the player
14:20
take out my uh earphone um the player
14:20
take out my uh earphone um the player stops so you can handle this kind of
14:22
stops so you can handle this kind of
14:22
stops so you can handle this kind of situation in coming calls and it was
14:24
situation in coming calls and it was
14:24
situation in coming calls and it was pretty good but it came with some cones
14:26
pretty good but it came with some cones
14:26
pretty good but it came with some cones so we consumed greater data because we
14:28
so we consumed greater data because we
14:28
so we consumed greater data because we used the vide as sour and not the MP3 so
14:31
used the vide as sour and not the MP3 so
14:31
used the vide as sour and not the MP3 so the user consumed a lot of more of
14:33
the user consumed a lot of more of
14:33
the user consumed a lot of more of megabytes H the module is no longer
14:36
megabytes H the module is no longer
14:36
megabytes H the module is no longer maintained now speaking so you have to
14:38
maintained now speaking so you have to
14:38
maintained now speaking so you have to maintain it on your own and Native
14:40
maintain it on your own and Native
14:40
maintain it on your own and Native development is needed for future Android
14:42
development is needed for future Android
14:42
development is needed for future Android versions because uh starting from
14:45
versions because uh starting from
14:45
versions because uh starting from Android 13 uh there are some problems
14:47
Android 13 uh there are some problems
14:47
Android 13 uh there are some problems with the kind of module so it had this
14:49
with the kind of module so it had this
14:50
with the kind of module so it had this kind of con and the other problem is
14:52
kind of con and the other problem is
14:52
kind of con and the other problem is that it led to some crashes so uh a lot
14:56
that it led to some crashes so uh a lot
14:56
that it led to some crashes so uh a lot of crashes happen because of this kind
14:58
of crashes happen because of this kind
14:58
of crashes happen because of this kind of module
14:59
of module
14:59
of module so and we have finally different
15:02
so and we have finally different
15:02
so and we have finally different behaviors between Android and iOS what
15:04
behaviors between Android and iOS what
15:04
behaviors between Android and iOS what do I mean by that if you're familiar
15:06
do I mean by that if you're familiar
15:06
do I mean by that if you're familiar with re native you use platform to
15:07
with re native you use platform to
15:07
with re native you use platform to detect with platform are you on and if
15:09
detect with platform are you on and if
15:09
detect with platform are you on and if you look in the code base in the first
15:11
you look in the code base in the first
15:11
you look in the code base in the first code base there was a lot of checks uh
15:13
code base there was a lot of checks uh
15:13
code base there was a lot of checks uh in which we checked if the system is IOS
15:16
in which we checked if the system is IOS
15:16
in which we checked if the system is IOS do something is the system is Android do
15:19
do something is the system is Android do
15:19
do something is the system is Android do something you don't want to have these
15:21
something you don't want to have these
15:21
something you don't want to have these kind of behaviors because it keep it is
15:24
kind of behaviors because it keep it is
15:24
kind of behaviors because it keep it is difficult to maintain and even here as
15:26
difficult to maintain and even here as
15:26
difficult to maintain and even here as you can see if platform is Android
15:28
you can see if platform is Android
15:28
you can see if platform is Android changes State seek the player and if
15:30
changes State seek the player and if
15:30
changes State seek the player and if it's iOS do another thing so it is it
15:33
it's iOS do another thing so it is it
15:33
it's iOS do another thing so it is it they are on different order but yeah you
15:36
they are on different order but yeah you
15:36
they are on different order but yeah you don't want to have this kind of problem
15:38
don't want to have this kind of problem
15:38
don't want to have this kind of problem so this take in consideration this if
15:40
so this take in consideration this if
15:40
so this take in consideration this if you want to develop a a custom player
15:43
you want to develop a a custom player
15:43
you want to develop a a custom player with react native because there's a lot
15:45
with react native because there's a lot
15:45
with react native because there's a lot of difference behaviors between IOS and
15:46
of difference behaviors between IOS and
15:46
of difference behaviors between IOS and Android due to the fact that um uh the
15:50
Android due to the fact that um uh the
15:50
Android due to the fact that um uh the native system operates differently
15:53
native system operates differently
15:53
native system operates differently between IOS and Android so you have to
15:54
between IOS and Android so you have to
15:54
between IOS and Android so you have to test a lot and came across a lot of
15:56
test a lot and came across a lot of
15:56
test a lot and came across a lot of problems but yeah this is the the part
15:59
problems but yeah this is the the part
15:59
problems but yeah this is the the part so even here this a different
16:02
so even here this a different
16:02
so even here this a different state and the difference is the behavior
16:05
state and the difference is the behavior
16:05
state and the difference is the behavior because Android even we had a uh higher
16:09
because Android even we had a uh higher
16:09
because Android even we had a uh higher Crush rate 10% of the users had problems
16:12
Crush rate 10% of the users had problems
16:12
Crush rate 10% of the users had problems which is high expect expected to uh if
16:17
which is high expect expected to uh if
16:17
which is high expect expected to uh if compared to I us so this was not pretty
16:19
compared to I us so this was not pretty
16:19
compared to I us so this was not pretty good so we wanted to solve this problem
16:22
good so we wanted to solve this problem
16:22
good so we wanted to solve this problem what are the lessons learned by these
16:24
what are the lessons learned by these
16:24
what are the lessons learned by these kind of developments so manag inde
16:26
kind of developments so manag inde
16:26
kind of developments so manag inde dependencies and V is hard because we we
16:28
dependencies and V is hard because we we
16:28
dependencies and V is hard because we we had a lot of dependencies in the project
16:30
had a lot of dependencies in the project
16:30
had a lot of dependencies in the project so managing all the updates and the uh
16:34
so managing all the updates and the uh
16:34
so managing all the updates and the uh the updates between the dependencies the
16:35
the updates between the dependencies the
16:35
the updates between the dependencies the compatibilities is very very difficult
16:38
compatibilities is very very difficult
16:38
compatibilities is very very difficult and in the long term uh using many
16:40
and in the long term uh using many
16:40
and in the long term uh using many modules is quick in short term because
16:42
modules is quick in short term because
16:42
modules is quick in short term because you are fast in development but in the
16:44
you are fast in development but in the
16:44
you are fast in development but in the long term it lows you down because you
16:46
long term it lows you down because you
16:46
long term it lows you down because you have to remove them sometimes because
16:48
have to remove them sometimes because
16:48
have to remove them sometimes because they're not more compatible and they're
16:50
they're not more compatible and they're
16:50
they're not more compatible and they're not updated so I would suggest to uh
16:53
not updated so I would suggest to uh
16:53
not updated so I would suggest to uh avoid using too many modules but
16:56
avoid using too many modules but
16:56
avoid using too many modules but sometimes you can develop something on
16:58
sometimes you can develop something on
16:58
sometimes you can develop something on your own because it's simple but yeah to
17:00
your own because it's simple but yeah to
17:00
your own because it's simple but yeah to maintain it but yeah in the long term
17:02
maintain it but yeah in the long term
17:02
maintain it but yeah in the long term you don't have to remove it and you are
17:04
you don't have to remove it and you are
17:04
you don't have to remove it and you are maintaining it then removing removing a
17:06
maintaining it then removing removing a
17:06
maintaining it then removing removing a feature is worse than not developing it
17:08
feature is worse than not developing it
17:08
feature is worse than not developing it in the first place what do I mean by
17:10
in the first place what do I mean by
17:10
in the first place what do I mean by that we developed the the audio
17:11
that we developed the the audio
17:11
that we developed the the audio background feature to the users but on
17:14
background feature to the users but on
17:14
background feature to the users but on iOS was perfect and Android was having
17:16
iOS was perfect and Android was having
17:16
iOS was perfect and Android was having problems but if we remove the features
17:19
problems but if we remove the features
17:19
problems but if we remove the features you users from IOS would complain but
17:21
you users from IOS would complain but
17:21
you users from IOS would complain but users on Android are still complaining
17:23
users on Android are still complaining
17:23
users on Android are still complaining so at first I would not have developed
17:25
so at first I would not have developed
17:26
so at first I would not have developed this kind of feature I would have
17:27
this kind of feature I would have
17:27
this kind of feature I would have started a very very lean with small
17:30
started a very very lean with small
17:30
started a very very lean with small features but that were working very well
17:31
features but that were working very well
17:31
features but that were working very well not with some problems and after that
17:34
not with some problems and after that
17:34
not with some problems and after that learn ones Run Anywhere more or less
17:37
learn ones Run Anywhere more or less
17:37
learn ones Run Anywhere more or less let's say that you have to test a lot of
17:39
let's say that you have to test a lot of
17:39
let's say that you have to test a lot of stuff if you're doing this kind of Niche
17:41
stuff if you're doing this kind of Niche
17:41
stuff if you're doing this kind of Niche product and this video on react native
17:44
product and this video on react native
17:44
product and this video on react native because as I said there are differences
17:46
because as I said there are differences
17:46
because as I said there are differences between IOS and Android and their
17:47
between IOS and Android and their
17:47
between IOS and Android and their behaviors so you have to be careful of
17:50
behaviors so you have to be careful of
17:50
behaviors so you have to be careful of uh that action items so what are the
17:53
uh that action items so what are the
17:53
uh that action items so what are the action items what are the solutions to
17:55
action items what are the solutions to
17:55
action items what are the solutions to these uh problems so the first action
17:58
these uh problems so the first action
17:58
these uh problems so the first action item is to reduce the number of
18:00
item is to reduce the number of
18:00
item is to reduce the number of dependencies because as I said before it
18:02
dependencies because as I said before it
18:02
dependencies because as I said before it slows you down sometimes and you can
18:04
slows you down sometimes and you can
18:04
slows you down sometimes and you can avoid using too many dependencies you
18:06
avoid using too many dependencies you
18:06
avoid using too many dependencies you have to we wanted to reduce the number
18:08
have to we wanted to reduce the number
18:08
have to we wanted to reduce the number of crashes on Android so to to uh make
18:12
of crashes on Android so to to uh make
18:12
of crashes on Android so to to uh make the same crash rate on than iOS then we
18:16
the same crash rate on than iOS then we
18:16
the same crash rate on than iOS then we wanted to improve the stability on
18:17
wanted to improve the stability on
18:17
wanted to improve the stability on Android and for this we had a solution
18:20
Android and for this we had a solution
18:20
Android and for this we had a solution which is to update react native video
18:22
which is to update react native video
18:22
which is to update react native video library yeah you could say this is easy
18:24
library yeah you could say this is easy
18:24
library yeah you could say this is easy of data library and that's it but as you
18:26
of data library and that's it but as you
18:26
of data library and that's it but as you can see here the first version that we
18:28
can see here the first version that we
18:28
can see here the first version that we were using was updated in 2022 Rec
18:31
were using was updated in 2022 Rec
18:31
were using was updated in 2022 Rec native but the the following stable
18:34
native but the the following stable
18:34
native but the the following stable versions were released two years later
18:36
versions were released two years later
18:36
versions were released two years later so we had to wait two years to update
18:38
so we had to wait two years to update
18:38
so we had to wait two years to update the library and fix all of these
18:40
the library and fix all of these
18:40
the library and fix all of these problems so uh now now we are in contact
18:43
problems so uh now now we are in contact
18:43
problems so uh now now we are in contact with the maintenance and the of the
18:45
with the maintenance and the of the
18:45
with the maintenance and the of the library so it's more easier to develop
18:47
library so it's more easier to develop
18:47
library so it's more easier to develop this kind of stuff but first we have to
18:49
this kind of stuff but first we have to
18:49
this kind of stuff but first we have to wait two years and to try to natively
18:51
wait two years and to try to natively
18:51
wait two years and to try to natively fix on our own all the problems so it's
18:53
fix on our own all the problems so it's
18:53
fix on our own all the problems so it's not an easy ride but right now if you
18:55
not an easy ride but right now if you
18:55
not an easy ride but right now if you want to use this model it's pretty
18:56
want to use this model it's pretty
18:56
want to use this model it's pretty stable it's not like in 2020 is very
18:59
stable it's not like in 2020 is very
18:59
stable it's not like in 2020 is very well maintained documented and I will
19:01
well maintained documented and I will
19:01
well maintained documented and I will suggest to use it so feel free to reach
19:03
suggest to use it so feel free to reach
19:03
suggest to use it so feel free to reach out if you every if you have any issue
19:05
out if you every if you have any issue
19:05
out if you every if you have any issue with rective video because we're in
19:06
with rective video because we're in
19:06
with rective video because we're in contact with the maintainers and we can
19:08
contact with the maintainers and we can
19:08
contact with the maintainers and we can help you out if you want so I hope to in
19:12
help you out if you want so I hope to in
19:12
help you out if you want so I hope to in this 20 minute to have to give to you a
19:15
this 20 minute to have to give to you a
19:15
this 20 minute to have to give to you a quick overview because there's a lot to
19:17
quick overview because there's a lot to
19:17
quick overview because there's a lot to talk about this kind of project on the
19:18
talk about this kind of project on the
19:18
talk about this kind of project on the player but yeah so feel free to reach
19:21
player but yeah so feel free to reach
19:21
player but yeah so feel free to reach out on Twitter on VI mail on check out
19:23
out on Twitter on VI mail on check out
19:23
out on Twitter on VI mail on check out my website if you want to know more
19:25
my website if you want to know more
19:25
my website if you want to know more about what I do and even about the other
19:27
about what I do and even about the other
19:27
about what I do and even about the other talk that I've done and about the
19:28
talk that I've done and about the
19:28
talk that I've done and about the streaming architecture you can find it
19:29
streaming architecture you can find it
19:30
streaming architecture you can find it on my website which is in English so can
19:32
on my website which is in English so can
19:32
on my website which is in English so can feel free to reach out and check all my
19:34
feel free to reach out and check all my
19:34
feel free to reach out and check all my content so thanks for having me it was
19:37
content so thanks for having me it was
19:37
content so thanks for having me it was very very good to be here
19:43
[Music]