ffmpeg filter_complex trim out-sync

Question

command line:

ffmpeg -i <INPUT> -filter-complex "<FILTER_COMPLEX>" -map "[ofa]" -map "[ofv]" -acodec aac -vcodec libx264 test.mp4

FILTER_COMPLEX content:

[0:v]split=3[sv1][sv2][sv3];
[0:a]asplit=3[sa1][sa2][sa3];
[sv1]trim=start=200:duration=5,setpts=PTS-STARTPTS[ov1];[sa1]atrim=start=200:duration=5[oa1];
[sv2]trim=start=300:duration=5,setpts=PTS-STARTPTS[ov2];[sa2]atrim=start=300:duration=5[oa2];
[sv3]trim=start=400:duration=5,setpts=PTS-STARTPTS[ov3];[sa3]atrim=start=400:duration=5[oa3];
[ov1][ov2][ov3]concat=n=3:v=1:a=0[ofv];
[oa1][oa2][oa3]concat=n=3:v=0:a=1[ofa]

As a result, the output video sounds are out of sync, and the video is redirected to 00:00:00, but the sound remains at the original time position.

Therefore, how to use ffmpeg to intercept several clips from a video, recombine them into a new video file, and keep the sound and picture synchronized.

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I tried with [sa1]atrim=start=200:duration=5,setpts=PTS-STARTPTS[oa1] but an error:

Media type mismatch between the 'Parsed_atrim_4' filter output pad 0 (audio) and the 'Parsed_setpts_5' filter input pad 0 (video)

Cannot create the link atrim:0 -> setpts:0
Error initializing complex filters.
Invalid argument

question from:https://stackoverflow.com/questions/65914729/ffmpeg-filter-complex-trim-out-sync

Answer 1

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