Alsa + OSS can be included/build at the same time.
Alsa or OSS can be runtime selected with -a.
Add audio thread support to OSS module.
Add polled audio support to alsa module.
Removed some debug source code.
Pass PTS to video codec.
Flush audio buffer on channel change.
Sync audio + video stream.
Add workaround for Intel VA-API driver that forgets OSD position/size.