[FFmpeg-trac] #11055(undetermined:new): "showinfo", "-show_frames": bad PTS, where "framecrc" had expected; plus inconsistent playback
FFmpeg
trac at avcodec.org
Sat Jun 15 23:41:45 EEST 2024
#11055: "showinfo", "-show_frames": bad PTS, where "framecrc" had expected; plus
inconsistent playback
-------------------------------------+-------------------------------------
Reporter: markfilipak | Owner: (none)
Type: defect | Status: new
Priority: important | Component:
| undetermined
Version: git-master | Resolution:
Keywords: vf_showinfo | Blocked By:
ffprobe -show_frames OGOP |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by markfilipak):
Replying to [comment:59 Balling]:
> LOL, your file is horrible, use state of the art software, it has bugs
too though
I got DVBinspector installed.
DVBinspector looks questionable.
Zoom in on packets 0..10531. DVBinspector's graph shows packet 3 with PTS
1:33:21.5266. It should also show DTS 1:33:21.4015. It doesn't.
Let's look at the first four frames:
packet 3, an I-frame
PTS: 504137396 -> 1:33:21.5266[2..]
DTS: 504126135 -> 1:33:21.4015
packet 3509, a B-frame
PTS: 504129888 -> 1:33:21.4432
packet 7015, a B-frame
PTS: 504133642 -> 1:33:21.4849[1..]
packet 10531, a P-frame
PTS: 504148657 -> 1:33:21.6517[4..]
DTS: 504137396 -> 1:33:21.5266[2..]
In packets 3..10531 there's 2 DTSes and 4 PTSes -- I'm looking right at
the PESes. DVBinspector's graph shows no DTS and 3 PTSes.
I don't really know what you folks are doing, but it looks to me that
you've 'tuned' FFmpeg to whatever DVBinspector shows. That DVBinspector is
questionable is a problem for FFmpeg, I think.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11055#comment:68>
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