#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:77 MasterQuestionable]:
> ͏ FF-series tools' output provides a good reference point:
Only if accurate and reliable, agreed?
> ͏ Most players are based on which, regardless; it would be what
attained during typical playback.
Are you saying that bugs should not be fixed in order to preserve the way
that FFmpeg currently works?
> ͏ Also the primary purpose is to diagnose FFmpeg: without testing,
how could?
I have tested. I tested for 2 weeks. On one hand we have show_frames and
showinfo, and on the other hand framecrc and a packet analyzer. The one
hand disagrees with the other hand. What more testing is needed?
> ͏ As mentioned: the timestamps appeared seriously wrong.
They do not appear wrong to a packet analyzer. They do not appear wrong to
framecrc. They do not play wrong to VLC and PowerDVD. What more do you
want?
> ͏ However there appears to be somehow ignored intermediate frames:
presumably due to OGOP.
Please do not presume. Test. If by "intermediate frames" you mean the gap,
it is not real. There is no gap in the video. All the GOPs on the
Criterion disk have open GOPs, 100%.
> ͏ Precisely, all frames may be free of DTS.
I don't know what you mean. I- and P-frames must have DTSes.
> ͏ However they do exist in some implementations.
I don't know what you mean.
> ͏ Regardless, what's parsed by FFprobe indeed contains interpolated
data. (that not really exist, but implied by other data)
What interpolated data? I'm not aware of any interpolation being done.
Even if there was interpolation, I don't see what relevance it would have
to wrong/backwards/missing DTSes and PTSes.
> ͏ Don't haste to make early judgment.
I've spent 2 months.
> ͏ Make more analysis on relevant technologies.
I don't know what you mean. Can you suggest relevant technology that would
explain why one part of FFmpeg says one thing and another part of FFmpeg
says something very different?
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11055#comment:80>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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