Codec quirks in hardware decoder?
I really haven't done much testing on this, but I've noticed a number of quirks with the stock video/music player (or possibly the hardware decoder).
Is this just me, or has anyone else noticed any of the following?
MKV with 1280x720 H.264 high@L4.1 + Vorbis stream:
Seriously laggy video. Have tried reducing the H.264 stream to baseline@L3.0, but same result.
mVideoPlayer shows exactly the same behaviour, suggesting possibly an issue with OS itself?
MX Video Player only seems to run this through the software decoder, and works fine.
MP4 with 1280x720 H.264 high@L4.1 + AAC-LC stream:
Simply remuxing the above video stream into MP4 seems to get rid of the lagginess. But seeking is horribly broken here. Audio seeks fine, but video doesn't, leading to audio/video desync.
MX Video Player (HW decoding) has exactly the same issue. The SW decoder is fine though.
Interestingly, Dice Player, using HW decoder, doesn't have this bug. What's up with that?
44.1kHz HE-AAC music in MP4 container:
Seems mostly fine, but I've noticed "clipping" artifacts in some places of the audio. These don't show up using a software decoder.
Also, is there a more definitive guide on what exactly
is supported in terms of media/codecs? I've seen this [http ://developer.android.com/guide/appendix/media-formats.html] (remove the space), but it's inaccurate, or at least lacking information. For example, some things I've picked up:
- MKV: header compression (which is enabled by default in mkvmerge) is not supported - will show up as invalid video if you have it
- H.264 support up to High profile @ level 4.1, level 5.0 won't play back (on HW decoder at least)