Opened 15 years ago
Closed 15 years ago
Last modified 15 years ago
#8652 closed defect (fixed)
Some h.264 encoded mkv files display audio sync issues
| Reported by: | Owned by: | Janne Grunau | |
|---|---|---|---|
| Priority: | minor | Milestone: | unknown |
| Component: | MythTV - Video Playback | Version: | Unspecified |
| Severity: | medium | Keywords: | |
| Cc: | Ticket locked: | no |
Description
I have several dvd rips encoded with handbrake in h.264 in mkv containers with display severe audio sync issues. Namely the video plays faster than the audio in an accelerating manner, so setting an offset for the audio is not effective as it will soon be out of sync again.
I'm not entirely sure this is a myth issue or a handbrake issue (or something else I'm overlooking) as my older encodes seem fine and only the more recent ones seem to have this problem but the same files play fine vlc, xine, mplayer, and at least one old version of mythtv (r24587).
This problem manifests itself in r25331. I have tried using different playback profiles and audio options and seen no change. I've attached mythfrontend log with -v genereal,important,playback,audio
Attachments (1)
Change History (5)
by , 15 years ago
| Attachment: | mythfrontend.log added |
|---|
comment:1 by , 15 years ago
Please try r25285 and report back. Also a sample would be appreciated.
I do notice that your video has mixed interlaced/progressive frames according to the logs but I'm unaware that this has ever caused an sync issue.
comment:2 by , 15 years ago
r25285 works. r25286 does not. I put a clip that's about 1 minute / 13.5 MB here http://www.filedropper.com/test-001 that exhibits the problem.
comment:4 by , 15 years ago
John, I fixed the problem where we make adjustments when the video timecodes don't match the frame intervals. This allows your video to playback much better. However, you may or may not notice but some video jitter is going to occur. Whatever software you are using is setting the container fps to 60000/1001. It appears you took a 29.97 fps DVD and detelecined to 23.976 so your container frame rate should have been set to 24000/1001. You can easily remux your video and specify the proper fps using mkvtoolnix-gui programs.
mythfrontend log