[FFmpeg-trac] #9597(undetermined:new): Missing frames with -stream_loop and -f concat
FFmpeg
trac at avcodec.org
Fri Jan 14 21:33:31 EET 2022
#9597: Missing frames with -stream_loop and -f concat
-------------------------------------+-------------------------------------
Reporter: bogus | Owner: (none)
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: 4.4.1 | Resolution:
Keywords: stream_loop | Blocked By:
concat |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Description changed by bogus:
Old description:
> Summary of the bug:
> I'm creating a looped slideshow video out of jpeg images. The resulting
> video is missing the first image/frame in all repeated sections.
>
> How to reproduce:
> {{{
> % ffmpeg -stream_loop 3 -r 1 -f concat -i list.txt out.mp4
> ffmpeg version 4.4.1
> built with gcc 11.2.0 (Rev1, Built by MSYS2 project)
> }}}
>
> For example, having list.txt like this:
> {{{
> file 'A.jpg'
> file 'B.jpg'
> file 'C.jpg'
> }}}
>
> The resulting video contains the following frames : ABC BC BC BC.
> It's length is 3+(3-1)*3 = 9 frames, while it shuld be 3*4 = 12 frames.
>
> See the attached archive.
>
> Patches should be submitted to the ffmpeg-devel mailing list and not this
> bug tracker.
New description:
Summary of the bug:
I'm creating a looped slideshow video out of jpeg images. The resulting
video is missing the first image/frame in all repeated sections.
How to reproduce:
{{{
% ffmpeg -stream_loop 3 -r 1 -f concat -i list.txt out.mp4
ffmpeg version 4.4.1
built with gcc 11.2.0 (Rev1, Built by MSYS2 project)
}}}
For example, having list.txt like this:
{{{
file 'A.jpg'
file 'B.jpg'
file 'C.jpg'
}}}
The resulting video contains the following frames : ABC BC BC BC.
It's length is 3+(3-1)*3 = 9 frames, while it should be 3*4 = 12 frames.
See the attached archive.
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9597#comment:2>
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