How to change video speed only while adding a same-speed separated audio stream with ffmpeg?
11,011
Solution 1
Got it worked!!!
ffmpeg -filter_complex [0:v]setpts=0.5*PTS -i INPUT -i INPUT -filter_complex [1:a]apad -shortest -y -preset ultrafast OUTPUT 2>&1
Solution 2
You can use complex filters
ffmpeg -i input.mkv -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mkv
https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20video
Author by
Pooja Jadav
Updated on June 05, 2022Comments
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Pooja Jadav almost 2 years
I'm using ffmpeg for video filter.
But, When I changed video speed, that time I got issue
Audio is longer than video :
ffmpeg -i INPUT.mp4 -filter:v setpts=0.5*PTS -shortest -y -preset ultrafast OUTPUT.mp4
I want to set audio's length same as video's length.
- shortest = to extend audio streams to the same length as the video stream
In my case,
shortest
is not working. Video file and audio file, both are different and then after merging in a video file. Video's last frame stop and audio is continued working.