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audirs5

macrumors 6502
Original poster
Oct 20, 2014
370
87
Simple.

Download a video or song from youtube. I'd like to be be able to cut the audio at a certain point.

NOT - "end time" feature in iTunes. I want to be able to cut the file.

Thanks.
 
Are you saving the audio from the files in mp3 format?
If so, try this:

MP3 Trimmer:
http://www.deepniner.net/mp3trimmer/

What sets MP3 Trimmer apart "from the rest of them" is that it can trim mp3 files while still in native mp3 format.
This means no converting of the files to another format (such as WAV or aiff), and then re-converting (and re-compressing, resulting in audio information loss) BACK TO mp3.
 
Easy with ffmpeg. Use "-t" option in secons for the duration and "-ss" in seconds or timestamp to set the start time offset.
Examples:
Trim starting from 10 seconds and end at 16 seconds (total time 6 seconds)
ffmpeg -i input.mp3 -ss 10 -t 6 -c:a copy output.mp3

Trim from timecode 00:02:54.583 to end of file
ffmpeg -i input.mp3 -ss 00:02:54.583 -c:a copy output.mp3

Trim from 00:02:54.583 for 5 minutes
ffmpeg -i input.mp3 -ss 00:02:54.583 -t 300 -c:a copyoutput.mp3
 
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