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View Full Version : Extracting audio from 4K 16:9 files?


Damon Meledones
05-08-2008, 11:03 AM
I have a series of dialog shots, all shot in 4K 16:9, from which I need the on camera audio. I transcoded the video in RedCine, but how do I extract the audio? RedAlert, RedLine, and QuickTime all crash and burn on the files, as expected. :help:
Leo Ticheli
05-08-2008, 11:28 AM
I've been able to open the QT proxy files in FCS; of course the video is unusable, but the audio files play fine.

Best regards,

Leo
Fredrik Harreschou
05-08-2008, 12:04 PM
So QuickTime Pro won't let you export the audio?
Damon Meledones
05-08-2008, 12:08 PM
Leo, I'll give your Final Cut idea a try when I get to the studio this afternoon. Fredrik, QuickTime crashes on opening many of the files, I haven't tried to extract the audio from files that don't crash on opening yet.

Thanks for the ideas!
Damon,
Fredrik Harreschou
05-08-2008, 12:24 PM
Fredrik, QuickTime crashes on opening many of the files, I haven't tried to the audio from files that don't crash on opening yet.

Thanks for the ideas!
Damon,

Remember that the _F.mov will more often crash QT, the others shouldn't...

Good luck!
Craig Schober
05-08-2008, 12:48 PM
Fredrik, QuickTime crashes on opening many of the files, I haven't tried to extract the audio from files that don't crash on opening yet.

in my experience, any quicktime proxy that doesn't immediately crash upon opening will allow the extraction of audio. but this ongoing problem should be fixed (according to red) in build 16...when it comes out...any day now.
Leo Ticheli
05-08-2008, 01:54 PM
Seems I remember that the audio quality is the same in all resolutions of the proxies.

I used the "H" versions in my tests...

Best regards,

Leo
Curran Giddens
05-08-2008, 03:19 PM
http://www.red.com/support/release_history/10

Have you tried the L & T plugin?
dmartos
05-10-2008, 07:46 AM
You can convert the proxy files to aiff audio in Compressor. Before importing the files into compressor, close the "preview" window, as the 4k 16:9 image will make things crash.
Damon Meledones
05-10-2008, 02:46 PM
Thanks for all of the feedback everyone! We ended up loading the M proxies onto a Final Cut Pro time line and exporting the audio from that, it worked great.