#11250: VVC MP4 decoding of frames missing
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Reporter: | Owner: (none)
Rupert_Williamson |
Type: defect | Status: new
Priority: important | Component: avformat
Version: git-master | Resolution:
Keywords: mp4 | Blocked By:
editlist |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Rupert_Williamson):
Replying to [comment:2 MasterQuestionable]:
> ͏ Also input "-ss" with output "-t"..?
> ͏ Try "-t" as input?
>
> ͏ Also express "-r" implies frame rate override:
> ͏ At times may cause unexpected behavior (when using with input of
defined frame rate incompatible).
I just tried several permutations of different orders of -ss, -i, and -t,
as well as including or excluding the -r flag. It seems like it only
happens when -r 60 is specified when decoding.
Here were the results:
{{{
-ss -i -t, -r encode, -r for decode: 209 frames
-ss -t -i, -r encode, -r for decode: 209 frames
-i -ss -t, -r encode, -r for decode: 209 frames
-ss -i -t, -r encode only: 240 frames
-ss -t -i, -r encode only: 240 frames
-i -ss -t, -r encode only: 240 frames
-ss -i -t, -r decode only: 209 frames
-ss -t -i, -r decode only: 209 frames
-i -ss -t, -r decode only: 209 frames
-ss -i -t, no -r flag used: 240 frames
-ss -t -i, no -r flag used: 240 frames
-i -ss -t, no -r flag used: 240 frames
}}}
Given both the .mov file and the output .vvc file are exactly 60.000 fps,
I don't really understand why the -r flag is causing a problem, but
apparently it is.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11250#comment:3>
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