Simply multiply by the reciprocal of the speed factor.     [crayon-6290ebbee3a90722248148/]     This does not affect the audio speed. Use -an to not include audio in the output.…

    Example : I want to speed up the first 4 seconds of my video.     Cut your video     [crayon-6290ebbee3fc0323328906/]     [crayon-6290ebbee3fc5374919287/]     Speed…

    [crayon-6290ebbee41ca374464583/]  

    [crayon-6290ebbee43af164672291/]  

    Stream Copy Enabled     [crayon-6290ebbee456c990953897/]     Stream Copy Disabled     [crayon-6290ebbee4572672139405/]  

    The most efficient method is to use negative mapping in the -map option to exclude specific stream(s) ("tracks") while keeping all other streams. Remove a specific audio stream / track [crayon-6290ebbee47aa267108748/] -map…

    Slightly modifying the command line by @izx, I got this:     [crayon-6290ebbee4a3f354171192/]     The result is (again, checked with exiftool), a metadata record reduced from 81 to 52…

    [crayon-6290ebbee4cc2874465414/]     And run the script:     [crayon-6290ebbee4cc8187121344/]  

    [crayon-6290ebbee4f2b433270504/]     This works with a bash5 or zsh shell. **/*.mp3 Every file matching .mp3 in every directory under the current echo ${song%/*} | sed -e 's|[/ ]|-|g’ convert…

    [crayon-6290ebbee5164498262187/]     The scale2ref scales the first input (to the filter) to the size of the second. The input pad indexes 0, and 1 refer to the first and 2nd input to…