#10159: filter trim/concat with single frames not working correctly
-------------------------------------+-------------------------------------
Reporter: hoby87 | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: filter trim | Blocked By:
concat |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug: using the filters trim and concat, where trim selects
single frames and concat should join them, there is an error that only 3
frames are joined, more are omitted. With selecting more than one frame
with each trim the problem vanishes. I get the result from the current git
master windows build. Also older linux builds (4.4) give this result.
Regardless of the number of trim filter, if they (all) select a single
frame, the result is 3 frames in the output. The problem is also present
when selecting single and multiple frames with trim.
How to reproduce (first command selects 5x1 frames, resulting in 3 frames
in output, second command selects 5x2 frames, resulting in 10 frames):
{{{
ffmpeg.exe -report -v 9 -loglevel 99 -i MVI_6289.MOV -filter_complex
"[0:v]trim=start=3.72:end=3.76,setpts=PTS-
STARTPTS,format=yuvj420p[1v];[0:v]trim=start=4.04:end=4.08,setpts=PTS-
STARTPTS,format=yuvj420p[2v];[0:v]trim=start=4.12:end=4.16,setpts=PTS-
STARTPTS,format=yuvj420p[3v];[0:v]trim=start=4.24:end=4.28,setpts=PTS-
STARTPTS,format=yuvj420p[4v];[0:v]trim=start=4.32:end=4.36,setpts=PTS-
STARTPTS,format=yuvj420p[5v];[1v][2v][3v][4v][5v]concat=n=5:v=1[v]" -map
"[v]" MVI_6289.out.MOV
ffmpeg.exe -report -v 9 -loglevel 99 -i MVI_6289.MOV -filter_complex
"[0:v]trim=start=3.72:end=3.80,setpts=PTS-
STARTPTS,format=yuvj420p[1v];[0:v]trim=start=4.04:end=4.12,setpts=PTS-
STARTPTS,format=yuvj420p[2v];[0:v]trim=start=4.12:end=4.20,setpts=PTS-
STARTPTS,format=yuvj420p[3v];[0:v]trim=start=4.24:end=4.32,setpts=PTS-
STARTPTS,format=yuvj420p[4v];[0:v]trim=start=4.32:end=4.40,setpts=PTS-
STARTPTS,format=yuvj420p[5v];[1v][2v][3v][4v][5v]concat=n=5:v=1[v]" -map
"[v]" MVI_6289.out.MOV
}}}
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Ticket URL: <https://trac.ffmpeg.org/ticket/10159>
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