ExoPlayer cache

Question

I'm traying to use ExoPlayer for playback video over http. And I want to save video after video was loaded and play it from cache. How Do implement cache and playback from cache? Can give me any samples.

Insoluble

I don't think there is default behavior that you can do this easily. It is open source. You can fork it and change the download location of the cache. – Judithjuditha

I have a same problem. do you find way for implementing this? – Paramo

@fisher3421 have you got any solution I am also looking for same. – Tights

Answer 1

You use cacheDataSource created using cache and dataSource. This cacheDataSource is then used by ExtractorSampleSource.Below is the code for audioRenderer, similarly can be done for videoRender; passing to exoplayerInstance.prepare(renderers).

Cache cache = new SimpleCache(mCtx.getCacheDir(), new LeastRecentlyUsedCacheEvictor(1024 * 1024 * 10));
DataSource dataSource = new DefaultUriDataSource(mCtx, "My Player");
CacheDataSource cacheDataSource = new CacheDataSource(cache, dataSource, false, false);
Allocator allocator = new DefaultAllocator(BUFFER_SEGMENT_SIZE);
ExtractorSampleSource extractorSampleSource = new ExtractorSampleSource(trackURI, cacheDataSource, allocator, BUFFER_SEGMENT_COUNT*BUFFER_SEGMENT_SIZE, new Mp3Extractor());
MediaCodecAudioTrackRenderer audioTrackRenderer = new MediaCodecAudioTrackRenderer(extractorSampleSource);

Steenbok

is this the entire implementation for getting caching to work? I've implemented this, but printing cache.getCacheSpace() shows 0 no matter what I do. Any ideas or tips to filling the cache? – Backset

Answer 2

What protocol are you using mpeg-dash or plain http.

You can override HttpDataSource and write incoming bytes to a file and when playing again check if file exists at the desired location and change the InputStream fed to the player from your file instead of HttpDataSource.

Superpatriot

Overriding HttpDataSource is wrong approach because ExoPlayer has target classes for cache implementation. For example CacheDataSource. I would like get right way of using this classes. – Insoluble

I wrote datasource for this purpose but downloaded file is some KB's bigger that expected. I don't know why. – Natasha

Answer 3

I use exoplayer with this library: https://github.com/danikula/AndroidVideoCache It helps you cache the video from a resource (URL, file)...

This is my sample code:

String mediaURL = "https://my_cool_vid.com/vi.mp4";
SimpleExoPlayer exoPlayer = ExoPlayerFactory.newSimpleInstance(getContext());
HttpProxyCacheServer proxyServer = HttpProxyCacheServer.Builder(getContext()).maxCacheSize(1024 * 1024 * 1024).build();

String proxyURL = proxyServer.getProxyUrl(mediaURL);


DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(getContext(),
                Util.getUserAgent(getContext(), getActivity().getApplicationContext().getPackageName()));


exoPlayer.prepare(new ProgressiveMediaSource.Factory(dataSourceFactory)
                .createMediaSource(Uri.parse(proxyURL)););

Cufic

Answer 4

This library is easy to use: https://github.com/danikula/AndroidVideoCache. You just need to have the initialization code found in the repo in an appcontroller.

For those using mediaitem, this is what you can do:

exoPlayer = new SimpleExoPlayer.Builder(context).build();
    holder.exoPlayerView.setPlayer(exoPlayer);
    HttpProxyCacheServer proxyServer = AppController.getProxy(context);
    String streamingURL = shortVideosRecommendationsArrayList.get(holder.getAbsoluteAdapterPosition()).getStreamingURL();
    String proxyURL = proxyServer.getProxyUrl(streamingURL);
  
    MediaItem mediaItem = MediaItem.fromUri(proxyURL);
    exoPlayer.setMediaItem(mediaItem);
    exoPlayer.setRepeatMode(exoPlayer.REPEAT_MODE_ALL);
    exoPlayer.prepare();
    exoPlayer.setPlayWhenReady(true);

Herzl