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10.6: Trim m4a audio files with QuickTime Player Apps
I previously used Fission to trim Audio Files to the required length, but since updating to 10.6, Fission crashes when attempting to save.

I discovered that I can use the Trim feature in QuickTime Player with m4a files as well as movies, even though it appears to save the file in .mov format. First find the file you want to trim and open it in QuickTime Player. Select Edit » Trim, use the slider to trim to the required length, then press the Trim button.

Select File » Save, and save the file as a Movie. Go to Finder and replace the .mov file extension with .m4a. The file will be recognized as an m4a audio file, and can be imorted to iTunes.
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10.6: Trim m4a audio files with QuickTime Player | 6 comments | Create New Account
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10.6: Trim m4a audio files with QuickTime Player
Authored by: ebernet on Oct 15, '09 11:02:06AM

While it may trim the .m4a, it places it in a .mov container, and we do not know whether it is recompressing.
I have been using the UPDATED Fission with 10.6 and have had no savings problems.



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10.6: Trim m4a audio files with QuickTime Player
Authored by: zongamin on Oct 15, '09 12:30:52PM

It doesn't appear to re encode - the save is instant - even a small file would take a few seconds to complete this task.



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10.6: Trim m4a audio files with QuickTime Player
Authored by: moviebiz on Oct 15, '09 01:19:55PM

If you open an m4a file in QuickTime 7.6.x you can export the audio as MPEG-4 and then select options where you can choose pass-through under audio so it doesn't re-encode the data. You will end up with a file with extension mp4, which can simply be renamed with the extension m4a for use in iTunes.



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10.6: Trim m4a audio files with QuickTime Player
Authored by: guentherdan on Oct 15, '09 04:41:37PM

this appears to work with mp3 files as well...



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10.6: Trim m4a audio files with QuickTime Player
Authored by: bluesdance on Oct 15, '09 05:52:12PM

This hint rocks because it referred me to Fission, which i just downloaded and fell in love with. Obviously you should just update your Fission and you'll be back in biznaz.



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10.6: Trim m4a audio files with QuickTime Player
Authored by: amusingfool on Oct 15, '09 07:00:54PM

When I've needed to do this, I've always just exported to WAV and used audacity, then re-encoded. I'll have to look at Fissure, to see how it compares.



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