Crop MP3 to first 30 seconds

Question

Original Question

I want to be able to generate a new (fully valid) MP3 file from an existing MP3 file to be used as a preview -- try-before-you-buy

Answer 1

My package medipack is a very simple command-line app as a wrapper over ffmpeg.

you can achieve trimming your video using these commands:

medipack trim input.mp3 -s 00:00 -e 00:30 -o output.mp3
medipack trim input.mp3 -s 00:00 -t 00:30 -o output.mp3

you can view options of trim subcommand as:

srb@srb-pc:$ medipack trim -h
usage: medipack trim [-h] [-s START] [-e END | -t TIME] [-o OUTPUT] [inp]

positional arguments:
  inp                   input video file ex: input.mp4

optional arguments:
  -h, --help            show this help message and exit
  -s START, --start START
                        start time for cuting in format hh:mm:ss or mm:ss
  -e END, --end END     end time for cuting in format hh:mm:ss or mm:ss
  -t TIME, --time TIME  clip duration in format hh:mm:ss or mm:ss
  -o OUTPUT, --output OUTPUT

you could also explore other options using medipack -h

srb@srb-pc:$ medipack --help
usage: medipack.py [-h] [-v] {trim,crop,resize,extract} ...

positional arguments:
  {trim,crop,resize,extract}

optional arguments:
  -h, --help            show this help message and exit
  -v, --version         Display version number

you may visit my repo https://github.com/srbcheema1/medipack and checkout examples in README.

Answer 2

This command also works perfectly. I cropped my music files from 20 to 40 seconds.

-y : force output file to overwrite.

ffmpeg -i test.mp3 -ss 00:00:20 -to 00:00:40 -c copy -y temp.mp3