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ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html#:~:text=To%20force%20the%20frame%20rate%20of%20the%20input,option%20may%20be%20needed%20for%20raw%20input%20files.
How do I change the audio frame rate with ffmpeg? - …
https://stackoverflow.com/questions/60174089/how-do-i-change-the-audio-frame-rate-with-ffmpeg
So these two options should change the frame size and frame rate of my audio stream, right? Well look what happens when I fix the frame size to 1024 and change the frame rate: $ ffmpeg -i in.mp3 -s:a 1024 -r:a 15 out.wav ... size= 2592kB time=00:00:15.04 bitrate=1411.3kbits/s speed= 262x $ ffmpeg -i in.mp3 -s:a 1024 -r:a 30 out.wav ... size= 2592kB time=00:00:15.04 …
audio - Ffmpeg - Changing frame rate without re-encoding ...
https://superuser.com/questions/1502456/ffmpeg-changing-frame-rate-without-re-encoding
First, compute how much you need to adjust the audio. Assuming this was originally a 25fps video you are slowing to 23.976, your speed factor is 23.976/25 = 0.959. We'll plug that into the atempo filter to adjust the speed of the audio, pulling it from the original source.mkv.
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
ffmpeg -i input.avi -r 24 output.avi To force the frame rate of the input file (valid for raw formats only) to 1 fps and the frame rate of the output file to 24 fps: ffmpeg -r 1 -i input.m2v -r 24 output.avi The format option may be needed for raw input files. 3 Detailed description
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