CODEWITHSUNDEEP
androidaudiovideoandroid-mediacodecmediaextractor
xin guo
xin guo

Reputation: 121

Android MediaCodec & MediaExtractor For video and audio playing

I'm new here and fresh to Android development. Here is my first question here.

I'm using MediaExtractor and MediaCodec to play mp4 file, with video and audio. Now I get one pair of extractor/codec for video and another pair of extractor/codec for audio, realized in two separate threads.

My question is: can I use just one extractor with two codecs to play video and audio synchronously?

If yes, How to do it? When I used extractor.selecttrack for one, the other won't work...

Thanks a lot.

Thanks to everyone's answer here. I have figure this out. I made a mistake that the extractor can only select one track. Actually, you can select more than one track, and extractor.advance() will read each track at one time subsequently.

Upvotes: 2

Views: 3052

Answers (2)

xin guo
xin guo

Reputation: 121

Thanks to everyone's answer here. I have figure this out. I made a mistake that the extractor can only select one track. Actually, you can select more than one track, and extractor.advance() will read each track at one time subsequently.

Upvotes: 4

mstorsjo
mstorsjo

Reputation: 13317

Yes, you should use just one extractor, and one MediaCodec instance per track.

You shoudldn't use MediaExtractor.selectTrack in this case, you should just read the packets from all tracks, and for each packet returned choose which MediaCodec to pass it to.

Upvotes: 3

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