Option to cut end of a video

[jkufner]

What is the purpose of your issue?

• Feature request (request for a new functionality)

Description

Since many videos have stupid annoying garbage on the end, it would be useful to have an option to cut away the garbage.

For example, if I wish to download https://www.youtube.com/watch?v=YKSU82afy1w, then I get some garbage starting at 0:57. So I can then run this command to remove the garbage:

youtube-dl 'https://www.youtube.com/watch?v=YKSU82afy1w' -o song.mkv
ffmpeg -i song.mkv -t 0:57 -c copy song.cut.mkv

It would be much better if I cud do simply this:

youtube-dl --end-at 0:57 https://www.youtube.com/watch?v=YKSU82afy1w

Basically the desired --end-at $T option equals -t $T -c copy of ffmpeg. Note the ffmpeg with -t but without -c copy will reencode the video. It's fine to be inaccurate and cut on the nearest key-frame since the garbage is usually a large change in the video anyway.

[remitamine]

Duplicate of #622.