I know how to use ffmpeg to adjust the video/audio sync and that is a real simple command not requiring any remuxing or such. This is what I use in my audiosync script and it runs very fast:
ffmpeg -i $SOURCEFILE -itsoffset $DELAY -i $SOURCEFILE -map 1:v -map 0:a -c copy $TARGETFILE But is it possible also to modify an mp4 video file to *play* faster/slower than original while keeping the accompanying audio pitch the same? It *can* be done for instance in the VLC video player on playback, but can one also modify the video file itself using ffmpeg so it will play at the new speed while keeping audio recognizable (not Donald Duckie)? If so how is it done? -- Bo Berglund Developer in Sweden _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
