Hello, I am trying rotate some webm videos by 90 degrees, ideally without re-encoding.
I tried this command: ffmpeg -i input.webm -vf “transpose=1” -t 20 output.webm But this re-encodes the video (slow) and there is noticeable quality loss. I also tried this command (which works for mp4) which does not re-encode but sets flags in the metadata: ffmpeg -i input.webm -c copy -metadata:s:v:0 rotate=90 output.webm But this does not do anything (I verified output file is identical to input). My video was downloaded from youtube with the following command: youtube-dl https://www.youtube.com/watch?v=1Qsxj-B1UPk -f 313+171 Any ideas? Thank you! _______________________________________________ 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".
