#11080: FFmpeg timestamps do not consistently agree with packet timestamps
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Reporter: markfilipak | Owner: (none)
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by markfilipak):
Replying to [comment:52 Balling]:
> Okay, first of all I immediatelly found a bug in Elecard in frame 80 on
this sample. Does not happen in ffmpeg or in VQ Analyzer.
I'm sorry, are you writing to me, or thinking 'out loud'?
You probably mean you found a bug _using_ Elecard. Why would you call it a
bug? That video was mastered by Criterion and the first PTS is 1048560. I
see that "1048560" as a sign -- almost a trademark -- of whatever encoder
the very best studios use.
> Anyway, yes. The first B frame in the GOP (again, in coded order ...
Do you mean in decoder (i.e., DTS) order? "Decoder order" is the term the
ITU uses. "DTS order" is the term I use because it's precise: The order is
ascending DTSes -- I can't help it, I'm a scientist.
>... GOP begins with I frame, in presentation/display it is I frame ...
I don't think so. I'm awfully sure that PTS order is B B I, where B B are
two (stale) open Bs.
>...) depends on P frame from the previous GOP,
https://i.imgur.com/Y9tduBw.png
This is the second or third time you've sent me a link to a picture that I
don't recognize as anything. There are no x-y axis units and I don't know
what the numbers across the top mean.
> Then I verified whether the non-IDR I frame is actually a recovery
point, it is. exaqct_match 1 checks out.
Sorry, I don't know what that means or signifies.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11080#comment:53>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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