First video frame is delayed cause Loadable is cancelled

[stari4ek]

It can be easily observed if DefaultBandwidthMeter is attached to DataSource. It notifies about bandwidth when transfer ends (when connection/socket is closed).

In my case:

• UdpDataSource is used (multicast)
• ExtractorSampleSource with TsExtractor
• h264/mp2 stream
• ExoPlayer from master (1.5.3)

It happens with ExtractorSampleSource.enable(int track, long positionUs) which calls restartFrom(long positionUs) which cancels Loadable which closes socket.

I've measured time between player goes to STATE_BUFFERING (and tracks info is available) and first video frame being rendered to surface

• with loader reset: ~1.2sec
• without reset: ~0.250sec

Checked 3 times for each situation on the same live stream.

With streams I'm using it drops ~300kb of data (collected in ~1.3sec).

[ojw28]

This issue is tracked by #1041.