On Wed, 4 May 2022 at 08:27, Bo Berglund <bo.bergl...@gmail.com> wrote: > I have a script that downloads a video live stream into a mp4 file while on > the > fly changing the format, basically re-encoding the video. > It uses this basic download command: > > CMD="ffmpeg -hide_banner ${MODE} -i \"${M3U8URL}\" -vf scale=w=-4:h=480 -c:v > libx264 -preset fast -crf 26 -c:a copy -t $DIFF $TARGETFILE" > [...] > I had expected the concatenated file to be a combination of the two sections > with no real problems but it turns out that the audio is completely out of > sync > in the output. Looks like by a *LOT*. > [...] > Grateful for any suggestions on what I can do!
Without the console output my suggestion would be: re-encode the audio portion as well in your first step. (-c:a aac or similar) I've run into similar desync issues when concat-ing half reencoded segments, so now if I'm re-encoding video I re-encode audio too. HTH, Rob _______________________________________________ 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".