[Bug 1782323] Re: -c:v copy renders audio and video out of sync
** Changed in: ffmpeg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
As said, this is a known limitation of MPlayer, the interesting question is if other players show A/V desync. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
At least mplayer. But I didn't check all those tablets and mobiles and smart TVs out there. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
Which players fail? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
Just because _some_ of these programs can use it, it does not necessarily mean they are correct mp4 files. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
That is what I believe, you could test with vlc, totem, ffplay (wmp and qt). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
So is this still a valid and commonly usable video? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
It is a known limitation of MPlayer that it needs audio for A/V sync, it therefore cannot "wait" for audio as FFplay should be able to. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
I currently do not see why this is not reproducible. I ran this on three different computers, all with 18.04, all producing the same result. I just tried this -mc 100 option. It works, although not from the very first frame. It starts out of sync, but then jumps, and then synchronizes more or less correctly. But I don't see it as a solution if it takes special options and some jumping effect to watch the video. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
When I set the resolution to "worksforme", I meant that I couldn't reproduce with FFmpeg 3.4, I would have set it to "invalid" if the issue were fixed. Are you searching for the MPlayer option "-mc 100"? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
Upstream: https://trac.ffmpeg.org/ticket/7299 ** Bug watch added: FFmpeg Trac bug tracker #7299 https://trac.ffmpeg.org/ticket/7299 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
mplayer -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
I can't seem to reproduce this. What player are you using for testing? I notice that in bad.mp4, there is about a second of extra video at the start of the stream with a negative timestamp. Maybe your video player doesn't handle this properly? If you have the link to the upstream bug, that might be useful. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
Please note that the two working methods shown in the Makefile have severe disadvantages. the first method (producing good.mp4) needs to decode and re-encode the video, thus slow and loss of quality. the second method (producing good2.mp4) needs to decode the video and thus is slow. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1782323] Re: -c:v copy renders audio and video out of sync
Makefile for Ubuntu 18.04 to demonstrate the problem. ** Attachment added: "Makefile" https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+attachment/5164806/+files/Makefile -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782323 Title: -c:v copy renders audio and video out of sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1782323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
