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AntonyCorbett / OnlyM

Simple Media Player (audio, video and images) for use in meetings.
MIT License
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Video Start Delay on Second Display when using Media Foundation not FFmpeg #336

Open chadmbrown opened 4 years ago

chadmbrown commented 4 years ago

Describe the bug When playing to a second screen the audio starts but video delays a couple seconds when using Media Foundation encode. This does not happen when using FFmpeg.

To Reproduce Simply send a 720p or higher quality video to a second screen using Media Foundation.

Expected behavior Audio/Video to start simultaneously

Desktop (please complete the following information): Windows Version: 10.0.18363 Build 18363 OnlyM Version: 1.5.0.31

AntonyCorbett commented 4 years ago

@chadmbrown is it ok when rendering to the main display?

chadmbrown commented 4 years ago

@AntonyCorbett - Yes. On the Second display it will be in sync also if I start and then pause immediately, wait 2 seconds and then play again. This problem doesn't exist with FFMpeg but I find some clipping when I use FFMpeg so I prefer a fix for Media Foundation if possible. I'm running an i7 with 16G of memory and turn off almost everything so that Task Manager is quiet.

AntonyCorbett commented 4 years ago

@chadmbrown it should be fixed with the —nogpu commandline setting as described in the wiki. Unfortunately it's caused by a known bug in the MS renderer that has not yet been addressed.

LvDaniel commented 4 years ago

@AntonyCorbett I'm having the same behavior. I'll test with --nogpu commandline. Also when I'm using FFmpeg as engine I have some clipping so unfortunately FFmpeg is not a viable option. Maybe if VLC can be added as engine we can avoid this Foundation adn FFmpeg bugs.

LvDaniel commented 4 years ago

Unfortunately I don't see any changes with or without "--nogpu" command. If I play a video downloaded from jw.org using Media Foundation, audio and video are not synchronized. There's a lag, probably under 1 second. But when I play some content from stream.jw.org the lag is more obvious (probably the mp4 file is more compressed). Unforuntately I can't use FFmpeg either due to the clipping from time to time. Using VLC everything runs smoothly.