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Premiere CC v9.2 - audio missing from clips

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Dan DenegrePremiere CC v9.2 - audio missing from clips
by on Feb 19, 2016 at 8:42:40 pm
Last Edited By Dan Denegre on Feb 19, 2016 at 9:21:35 pm

Very frustrating issue happening in multiple projects: random clips will be missing part of their audio.

You can see the issue here: http://imgur.com/2Vn8fx5

I've deleted the media cache, saved new versions of the project file, moved my cache directories and tried offlining/relinking as well as rendering/replacing. Nothing seems to bring it back. Premiere will randmoly re-conform various clips in a project when it loads, but it doesn't consistently conform files on each open.

The ONLY thing that seems to work is using timemachine to restore the project file, but I shouldn't have to be doing this for all my projects.

Any ideas? I've been reading through theses forums and other sites trying fixes but can't seem to identify the issue.

Update: I just deleted the media cache, restored the project file from this morning and let Premiere reconform and render everything. The result is that the missing audio now loops a sample from that clip: http://imgur.com/eTKN0Eo

What I'm on:
  • Premiere CC v9.2, build 41
  • Mac Pro Late 2013
  • 3ghz 8core
  • 64 GB RAM
  • AMD Dual D500
  • Projects stored on G-Drive Raid 0, 8TB Drive, thunderbolt
  • Timemachine on a USB 3.0 8TB Drive


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Chris WrightRe: Premiere CC v9.2 - audio missing from clips
by on Feb 19, 2016 at 10:55:02 pm

did you try reencoding them with handbrake? it might be a video codec/audio vbr issue.


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Dan DenegreRe: Premiere CC v9.2 - audio missing from clips
by on Feb 22, 2016 at 9:13:39 pm

What do you recommend re-encoding them to? The original footage is AVCHD


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Chris WrightRe: Premiere CC v9.2 - audio missing from clips
by on Feb 22, 2016 at 11:18:27 pm

if your not keying anything, most people use these:

Avid DNxHD vs Apple ProRes
http://avid.force.com/pkb/articles/en_US/Download/en423319
DNxHD is cross platform and less cpu intensive decoding
prores only works in mac(for the most part)
AVIDs ProRes MXF codec wraps fast for native editing in avid

as far as I know, there are no uncompressed lossless prores files.
https://www.apple.com/final-cut-pro/docs/Apple_ProRes_White_Paper.pdf


some people recommend Cineform 16bit RGB codec.(the go pro codec)
http://shop.gopro.com/softwareandapp/gopro-studio/GoPro-Studio.html#/start=...

if you're keying, and you can't lose a single bit of data, you'll need uncomressed 444. quicktime png avi is only 8 bit though but AVCHD is also only 8 bit anyway so there's no advantage to transcoding to 16 bit.

if you converted out of AVCHD into 16 bit land, you'll want to stay there throughout the grading process.


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