Thursday, June 5, 2014

[Avid-L2] stuttering playback with XAVC 4K AMA

 

I'm just starting a new doc and hoped to use AMA to review footage with the director before transcoding for editing.  Main camera is a Sony F55, recording XAVC 4K.

Here's my Mac specs:

Mac Pro mid-2010  (MacPro5,1)
2x2.66 GHz 6-core Intel Xeon
RAM: 12 GB 1333 MHz DDR3 ECC
ATI Radeon HD 5770 1024 MB
OSX 10.9.2

Footage is on a 4TB 7200 rpm HDD on a dock hooked up via eSata -- should be getting 100~140 MB/s

XAVC 4K is around 240 Mbps, (~30 MB/s).  Plays nice and smooth in VLC, but both audio and video have tons of stutter using AMA in MC 7.0.x at anything beyond yellow/green quality.

Am I crazy to think this should be working better?  This is a top-of-the-line last-generation system -- it benchmarks about the same as an 8-core trashcan.  Anyone getting better performance with a similar setup?

It looks like my RAM might be a little low (16 GB+ seems to be Avid's recommendation for 4K frameflex workflows).  Is that the likely culprit? 

Thanks for any insights,
--Michael

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Posted by: Michael Brockington <brocking@sfu.ca>
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