for video: -vf setpts=0.5*PTS for audio: -af atempo=2 Ulf Zibis <[email protected]> 于2020年3月27日周五 上午8:42写道：
> Hi, > > I want to slow down a mp4 video from 30 to 15 fps, so it has twice > duration. Also I want the audio stream to to transform so that the audio is > transformed to the natural frequency, i.e. the speach is in half speed. > > How can I do this? > > -Ulf > > -- > Von meinem Seibert gesendet > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
