On 09-01-2021 08:06 am, Bernhard Döbler wrote:
Am 08.01.2021 um 05:18 schrieb Gyan Doshi:
On 08-01-2021 06:37, Bernhard Döbler wrote:
I have video files. I want to extract the audio and use one single
frame from the video track as cover image.
The command line looks like this
ffmpeg.exe -y -i "e:\01. Video.mp4" -filter:v
"select=between(145\,prev_pts*TB\,pts*TB)" -frames:v 1 -c:a copy
-c:v mjpeg -q:v 2 -disposition:v:0 attached_pic "e:\01. Audio.m4a"
This is supposed to embed a frame from around second 145 as cover
image.
The issue is that the whole processing of the file stops after the
single image was extracted and my resulting file has a length of
2:25 minutes. I want the audio file to be as long as the video.
`-frames` is set to terminate the output when fulfilled. Use trim
within the filtergraph.
ffmpeg.exe -y -i "e:\01. Video.mp4" -filter:v
"select=between(145\,prev_pts*TB\,pts*TB),trim=end_frame=1" -c:a copy
-c:v mjpeg -q:v 2 -disposition:v:0 attached_pic "e:\01. Audio.m4a"
Thank you for your answer.
The console eventually reads
More than 1000 frames duplicated
[ipod @ 00000299cb43de80] Got more than one picture in stream 0,
ignoring.
when I call your command as is.
Inefficient, but those extra images aren't muxed into the output. That's
what the ignoring msg means.
You can avoid the duplication by adding `-vsync vfr`.
For your workaround, mpdecimate is not relevant, only the setpts filter.
Regards,
Gyan
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