On Wed, 28 Apr 2021 23:43:51 +0200, Nicolas George <geo...@nsup.org> wrote:
>You changed the speed of the audio and not the video, what did you >expect? FFmpeg does what you tell it to do, it cannot read your mind. I did NOT want to change the *speed* of neither the audio nor the video! What I wanted was to change the *pitch* of the audio while retaining the playback speed! So the playback time of the video should be the same as before and the audio pitch changed without losing lip sync. It is not like having an audio tape recorder and then increase the speed of the tape feed motor, that only produces a faster playback (shorter time of the playback) with a higher pitch audio (like in Donald Duck comics). What I am after is what VLC can do, namely speed up or down the video playback while *retaining* the pitch of the audio without losing lip sync. If VLC can do it so should ffmpeg be able to (since I believe VLC uses ffmpeg in the background). No mind reading needed here. But I have no knowledge on *how* VLC does this only that it is used in my own video player/editor when speeding up the playback for instance. It uses API:s from VLC, but cannot save to a video file, just display the video... -- 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".
