On Wed, 28 Apr 2021 11:35:47 +0200, Michael Koch <astroelectro...@t-online.de> wrote:
>> I had tested this (which I found by googling) before I posted: >> >> ffmpeg -i input20.mp4 -filter:a "atempo=1.25" -vn output20.mp4 >> >> There were no errors displayed but the resulting file *ONLY* contains the >> audio >> part, I neeed both and the audio change must not change the length or >> lipsync of >> the file. > >Sure, that's because -vn means "no video output". Just remove this >option and then your output file will contain audio and video. OK, that included the video... But now there is no lip-sync at all. Seems to drift longer apart during the video playing. Audio and video running at different speeds. I think I will abandon this experimental test. It was just an idea on how to possibly improve a bad 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".
