Mpv: Stuttering with .ogm files.

[z0z0z]

When trying to play an .ogm file (I've tried multiple) it constantly stutters making it pretty much unwatchable, warnings in the terminal appear like this:

No video PTS! Making something up.
AV: 00:00:00.542 / 00:45:56.159 (0%) A-V:  0.000
No video PTS! Making something up.
AV: 00:00:00.625 / 00:45:56.159 (0%) A-V:  0.000
No video PTS! Making something up.
AV: 00:00:00.709 / 00:45:56.159 (0%) A-V:  0.000
No video PTS! Making something up.
AV: 00:00:00.917 / 00:45:56.159 (0%) A-V:  0.000
Invalid video timestamp: 0.917583 -> 0.875874
AV: 00:00:00.875 / 00:45:56.159 (0%) A-V:  0.000
No video PTS! Making something up.

ffprobe output of the file:

Duration: 00:45:56.16, start: 0.000000, bitrate: 1352 kb/s
Stream #0:0: Video: mpeg4 (DX50 / 0x30355844), yuv420p, 640x368 [SAR 1:1 DAR 40:23], 23.98 fps, 23.98 tbr, 23.98 tbn, 30k tbc
Stream #0:1(English): Audio: vorbis, 48000 Hz, stereo, fltp, 72 kb/s
Stream #0:2(English): Subtitle: text

ffmpeg-2.7.1
mpv-d11184a

[ghost]

Looks like a broken file. Remux with mkvmerge,. Fuck ogm.

[z0z0z]

ffmpeg gives me errors when trying to remux with that, which was one thing I tried. I'm assuming the problem goes back to ffmpeg but I figured I'd see if anything could happen here. Just saying it does the same thing with every ogm file I found.

I guess I'll try mkvmerge, and give up trying to natively watch ogm files with mpv or ffmpeg-based players.

[ghost]

mkvmerge seems to be pretty good at handling ogg, so maybe it has higher chances at success than ffmpeg. ffmpeg will obviously perform on a similar level as mpv, because mpv uses the ffmpeg libraries.

[ghost]

You could also report this to ffmpeg, but I really don't care much. ogm support is just too broken overall. (mpv itself doesn't contain a single line specific to handling of ogm files.)

[z0z0z]

For anyone who finds this and is having trouble with the same issue, --no-correct-pts gives normal playback.

[ghost]

That's a quite brutal method and can lead to audio problems, but if it works, great.

Have you tried reporting it to ffmpeg?

[Niektory]

I'll add that this bug didn't exist in older versions, for example this version plays .ogm files without issues:
mpv git-b4f72b4 (C) 2000-2014 mpv/MPlayer/mplayer2 projects
built on 2014-08-08T00:05:19
ffmpeg library versions:
libavutil 52.98.100
libavcodec 55.72.102 (runtime 55.73.101)
libavformat 55.51.101 (runtime 55.53.100)
libswscale 2.6.100 (runtime 2.6.101)
libavfilter 4.11.102 (runtime 4.11.103)
libavresample 1.3.0

[ghost]

Yeah, but its ffmpeg is also older. It's likely that this is a ffmpeg regression.

[ghost]

PS: unless you're saying that a newer mpv build linked to the same ffmpeg libs exposes the issue.