media_trim

https://github.com/mslinn/media_trim

Trim an audio or video file using ffmpeg - Works with all formats supported by ffmpeg, including mp3, mp4, mkv, and many more. - Seeks to the nearest frame positions by re-encoding the media. - Reduces file size procduced by OBS Studio by over 80 percent. - Can be used as a Ruby gem. - Installs the 'trim' command. When run as a command, output files are named by adding a 'trim.' prefix to the media file name, e.g. 'dir/trim.file.ext'. By default, the trim command does not overwrite pre-existing output files. When trimming is complete, the trim command displays the trimmed file, unless the -q option is specified Command-line Usage: trim [OPTIONS] dir/file.ext start [[to|for] end] - The start and end timecodes have the format [HH:[MM:]]SS[.XXX] Note that decimal seconds may be specified, bug frames may not; this is consistent with how ffmpeg parses timecodes. - end defaults to end of the audio/video file OPTIONS are: -d Enable debug output. -f Overwrite output file if present. -h Display help information. -v Verbose output. -V Do not @view the trimmed file when complete. Examples: # Crop dir/file.mp4 from 15.0 seconds to the end of the video, save to demo/trim.demo.mp4: trim demo/demo.mp4 15 # Crop dir/file.mkv from 3 minutes, 25 seconds to 9 minutes, 35 seconds, save to demo/trim.demo.mp4: trim demo/demo.mp4 3:25 9:35 # Same as the previous example, using optional 'to' syntax: trim demo/demo.mp4 3:25 to 9:35 # Save as the previous example, but specify the duration instead of the end time by using the for keyword: trim demo/demo.mp4 3:25 for 6:10