Develop Reference

How to use ExoPlayer in Android

In my application I want use exoplayer to play video and for this I added this dependency:
implementation 'com.google.android.exoplayer:exoplayer:2.18.0'
with simple way I can play video with this code:
player = ExoPlayer.Builder(this).build()
binding.player.player = player
// Build the media item.
val mediaItem: MediaItem = MediaItem.fromUri(url)
// Set the media item to be played.
player.setMediaItem(mediaItem)
// Prepare the player.
player.prepare()
// Start the playback.
player.play()
But I want add Header for video and for this I write below codes:
val dataSourceFactory: DataSource.Factory = DataSource.Factory {
val dataSource: HttpDataSource = httpDataSourceFactory.createDataSource()
// Set a custom authentication request header.
dataSource.setRequestProperty("Header", "Value")
dataSource
}
But in my code not found httpDataSourceFactory.
I used this link tutorial : https://exoplayer.dev/customization.html#customizing-server-interactions
How can I add header for exoplayer?

val dataSourceFactory = DefaultHttpDataSource.Factory()
.setDefaultRequestProperties(hashMapOf("Header" to "Value"))
val audioSource: MediaSource = ProgressiveMediaSource.Factory(dataSourceFactory)
Use the "DefaultHttpDataSource"

ExoPlayer not loading subtitles from .srt file

So I am trying to show subtitles from my .srt file in exoplayer but it does not work.
Do I need to use a seperate SubtitleView to get my subtitles to show up?
Is the subtitleView in the PlayerView is not enough?
I use PlayerView btw.
The exoplayer version I use is 2.14.0.
The addTextOutput method.
simpleExoPlayer.addTextOutput(cues -> {
playerView.getSubtitleView().setCues(cues);
playerView.getSubtitleView().setVisibility(View.VISIBLE);
playerView.getSubtitleView().onCues(cues);
assert cues.get(0).text != null;
Log.d("subtitles", cues.get(0).text.toString());
});
I also tried to implement to TextOutput but that did not work too.
The contents of my sample.srt file:
1
00:00:00,000 --> 00:00:01,500
For www.forom.com
2
00:00:01,500 --> 00:00:02,500
<i>Tonight's the night.</i>
3
00:00:03,000 --> 00:00:15,000
<i>And it's going to happen
again and again --</i>
The function I use to load my subtitles:
public void buildMediaSourceV3(Uri uri){
String subtitlesUri = sharedPreferencesSubtitles.getString(videoName.getText().toString(), "");
DataSource.Factory factory = new DefaultDataSourceFactory(VideoPlayer.this, getPackageName(), new DefaultBandwidthMeter());
MediaItem mediaItem = MediaItem.fromUri(uri);
MediaSource videoSource = new ProgressiveMediaSource.Factory(factory).createMediaSource(mediaItem);
if(subtitlesUri.equals(""))
{
simpleExoPlayer.addMediaSource(videoSource);
}
else
{
MediaItem.Subtitle subtitle = new MediaItem.Subtitle(Uri.parse(subtitlesUri), MimeTypes.APPLICATION_SUBRIP, "en");
MediaSource textMediaSource = new SingleSampleMediaSource.Factory(factory).createMediaSource(subtitle, C.TIME_UNSET);
textMediaSource.getMediaItem().mediaMetadata.subtitle.toString();
MergingMediaSource mergingMediaSource = new MergingMediaSource(videoSource, textMediaSource);
simpleExoPlayer.addMediaSource(mergingMediaSource);
}
}

I know you've already implemented a workaround.
I've just encountered the same issue, and found a solution:
trackSelector.setPreferredTextLanguage
This helped me. Full context:
val trackSelector = DefaultTrackSelector(context)
trackSelector.setParameters(trackSelector.buildUponParameters().setPreferredTextLanguage("en"))
Update:
I was wrong. That solution shows only video embedded captions, not the sideloading ones.
This works for me now:
val mediaItemBuilder = MediaItem.Builder()
.setUri(uri))
videoCaption?.vtt?.let {
val uriSubtitle = Uri.parse(it)
val mediaItemSubtitle = MediaItem.Subtitle(uriSubtitle,
MimeTypes.TEXT_VTT,
"en",
C.SELECTION_FLAG_DEFAULT)
mediaItemBuilder.setSubtitles(mutableListOf(mediaItemSubtitle))
}
val mediaItem = mediaItemBuilder.build()
val mediaSource = DefaultMediaSourceFactory(dataSourceFactory, extractoryFactory).createMediaSource(mediaItem)

Here is minimal example for video/mp4 with SRT subtitles. For XML layout is used com.google.android.exoplayer2.ui.StyledPlayerView and there is no need for additional subtitle layout. Files are located in assets directory inside the project.
val playerView = view.findViewById<StyledPlayerView>(R.id.video_pv)
val exoPlayer = ExoPlayer.Builder(requireActivity()).build()
playerView.player = exoPlayer
val assetSrtUri = Uri.parse(("file:///android_asset/subtitle.srt"))
val subtitle = SubtitleConfiguration.Builder(assetSrtUri)
.setMimeType(MimeTypes.APPLICATION_SUBRIP)
.setLanguage("en")
.setSelectionFlags(C.SELECTION_FLAG_DEFAULT)
.build()
val assetVideoUri = Uri.parse(("file:///android_asset/video.mp4"))
val mediaItem = MediaItem.Builder()
.setUri(assetVideoUri)
.setSubtitleConfigurations(ImmutableList.of(subtitle))
.build()
exoPlayer.setMediaItem(mediaItem)
exoPlayer.prepare()
exoPlayer.play()
Gradle dependencies:
implementation "com.google.android.exoplayer:exoplayer:2.17.1"
implementation "com.google.android.exoplayer:exoplayer-core:2.17.1"
implementation "com.google.android.exoplayer:exoplayer-ui:2.17.1"

Small laggy when prepare exoplayer

In my application, I had an infinite animation. Actually, it's a TextSwitcher animation running from left to right. However, whenever I tried to prepare the player, I got a jitter issue with the text's animation. Although it's just a few milliseconds, it caused my texts was like jumping from left to right. Here's the prepare video method:
private fun prepareVideo(uri: Uri): SimpleExoPlayer? {
val simpleExoPlayer = SimpleExoPlayer
.Builder(this) // .setLoadControl(defaultLoadControl)
.build()
val mediaItem = MediaItem.fromUri(uri)
simpleExoPlayer.setMediaItem(mediaItem)
val eventListener: Player.EventListener = object : Player.EventListener {
override fun onPlaybackStateChanged(state: Int) {
if (state == ExoPlayer.STATE_READY) {
playVideo(simpleExoPlayer)
}
}
}
simpleExoPlayer.addListener(eventListener)
simpleExoPlayer.playWhenReady = false
simpleExoPlayer.prepare()
showToast("Prepare video")
return simpleExoPlayer
}
Do you guys have any idea to fix it?

If you thinks problem in this part of code i can recommend you to try initialize your SimpleExoPlayer object in application class and use it's instance all across application.

Try with this code
var exoPlayer: SimpleExoPlayer? = null
private fun setupVideo(uriString: String) {
val appName = R.string.app_name
val trackSelector: TrackSelector = DefaultTrackSelector()
val userAgent = context.let { Util.getUserAgent(it, it.getString(appName)) }
val sourceFactory = DefaultDataSourceFactory(requireContext(), userAgent)
val uri = Uri.parse(uriString)
val mediaSource = ProgressiveMediaSource.Factory(sourceFactory).createMediaSource(uri)
exoPlayer = ExoPlayerFactory.newSimpleInstance(context, trackSelector)
exoPlayer?.prepare(mediaSource)
exoPlayer?.playWhenReady = false
pvPlayer.player = exoPlayer
}

After quite some time investigating, I found the issue is creating an ExoPlayer instance.
val simpleExoPlayer = SimpleExoPlayer
.Builder(this) // .setLoadControl(defaultLoadControl)
.build()
Just this simple blook took about 0.1 seconds to finish. As a result, it froze the animation for a short period of time. I decided to create it on splash screen and reused it whenever possible.

How to Concatenate an ArrayList of MediaSources in ExoPlayer

I would like to know how to be able to play more than two songs back to back in ExoPlayer using MediaSources I have in an ArrayList.
I can use ConcatenatingMediaSource to be able to play two songs back to back, but I have to load them into this fundtion as separate paramters. I do not want to do this for a whole list of songs. I have tried to find an answer to this and seem to have some fundemental misunderstanding as I can't seem to replicate the efforts of others in other StackOverflow questions or blogs etc. (Many blogs show the simple two media source playlist as in the ExoPlayer docs).
This code is for context:
private fun prepareExoPlayer(songs: ListSongs) {
val uris = parseUris(songs)
val mediaSource = buildMediaSource(uris)
applyAudioAttributes()
simpleExoPlayer!!.prepare(mediaSource, false, false)
}
This code is where the issue is:
private fun buildMediaSource(uris: ArrayList<Uri>): MediaSource {
val userAgent = Util.getUserAgent(this, "MusicPlayer")
val defaultMediaSource = DefaultDataSourceFactory(this, userAgent)
val progressiveMediaSource = ProgressiveMediaSource.Factory(defaultMediaSource)
val mediaSources = ArrayList<MediaSource>()
for (uri in uris) {
mediaSources.add(progressiveMediaSource.createMediaSource(uri))
}
return if (mediaSources.size == 1) {
mediaSources[0]
} else {
val concatenatingMediaSource = ConcatenatingMediaSource()
concatenatingMediaSource.addMediaSources(mediaSources)
// ConcatenatingMediaSource(mediaSources[0], mediaSources[1])
}
}
In the else statement I get a failure as the return type is not a MediaSource, but a Unit. However, the commented code on the last line works fine. How do I modify the 2nd and 3rd last line to be able to play my list of songs?

Ok, so I just found this video: https://www.youtube.com/watch?v=svdq1BWl4r8
Turns out prepare for ExoPlayer does not have to have a MediaSource as a parameter, but can have a ConcatenatingMediaSource as a parameter as well. These aren't the same but are both accepted by the prepare function.
It's also worth noting that ConcatenatingMediaSource can recieve a single MediaSource. This means the if statement check on the size of the MediaSource ArrayList isn't necessary.
The solution is therefore to change the return type of buildMediaSource to ConcatenatingMediaSource and remove the if statement. Like this:
private fun buildMediaSource(uris: ArrayList<Uri>): ConcatenatingMediaSource {
val userAgent = Util.getUserAgent(this, "MusicPlayer")
val defaultMediaSource = DefaultDataSourceFactory(this, userAgent)
val progressiveMediaSource = ProgressiveMediaSource.Factory(defaultMediaSource)
val mediaSources = ArrayList<MediaSource>()
for (uri in uris) {
mediaSources.add(progressiveMediaSource.createMediaSource(uri))
}
val concatenatingMediaSource = ConcatenatingMediaSource()
concatenatingMediaSource.addMediaSources(mediaSources)
return concatenatingMediaSource
}

ExoPlayer taking too long to play video

I am trying to play a video with exoplayer but it's taking too long to play.
How do I fix this issue?
PS - internet speed is not (so no speed issue)
private fun exoPlayerSetupVideo() {
var trackSelector = DefaultTrackSelector()
//var loadControl = DefaultLoadControl()
var exoPlayer = ExoPlayerFactory.newSimpleInstance(this, trackSelector)
simpleExoPlayerView.player = exoPlayer
var dataSourceFactory = DefaultDataSourceFactory(this, Util.getUserAgent(this, "VideoPlayer"))
var videoSource = ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(Uri.parse(url1))
exoPlayer.prepare(videoSource)
exoPlayer.playWhenReady = true
}

Have you tried some video urls inside the assets folder that the exoplayer demo project provide? If they play normally means that exoplayer is not the problem.