[mythtv] FFmpeg mediacodec problem

[Peter Bennett]

Hi Aman

mediacodec playback is working quite well now in mythfrontend, but I 
have a problem with ffmpeg as follows:

When decoding 3840x2160 content, there is pixellation caused by dropped 
frames. The frames are being dropped because of apparent inconsistent 
behavior in ffmpeg.

MythTV calls avcodec_send_packet to send the next packet. It receives 
-11 return code (EAGAIN) indicating it must call avcodec_receive_frame 
and then try to send again. We call avcodec_receive_frame and it is also 
getting a -11 return code indicating it must send a packet before it can 
receive. According to the documentation this will never happen. MythTV 
then reports an error, drops the packet and moves on to the next one. 
This is happening many times. eventually the avcodec_receive_frame works 
and we receive a frame, but later the pattern repeats.

I tried turning on ffmpeg debug logging but I did not see any message 
from that.

Please advise what should be done. Let me know if you need more information.

Peter