Avid DNX-36 to Compressor

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Level 1

74 points

Avid DNX-36 to Compressor

You guys may like this one.
To speed up my exports from the avid, I have networked it into the Xsan via Fiber Channel.
I export the avid Dnx-36 codec @1920x1080 24FPS.
I have installed the avid codec on 3 other computers set up with Q-master and Compressor.
When I export from the avid I save as a self contained file. The files are around 85GB.
I drop the avid file on a compressor droplet to kick out multiple versions of the file (MPG2 and H.264)
This adds an ID bug to the file for identification, and also adds timecode window burn.
I post eh H.264 to the web for approval.

I burn the mpeg2 file to disk using DVD Studio Pro.

These are long encodes, This frees up days of work for the avid every week.

14 MacPro 3Ghz quads 20Imac Core Duo's, Mac OS X (10.4.10), 2x 40TB Xsans

Posted on Nov 29, 2007 2:40 AM

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Answer 1

Vision Author

Level 1

74 points

Jan 2, 2008 6:50 PM in response to Vision

I ran a benchmark test today with 7 machines cluster together.
Here are the results.

*Encode test 1*
12 min 45 sec avid DNX HD video
6.15 GB
converted using 7 machines cluster together.
5x 2Ghz Dual-Core Intel Xeon 4GB memory
1x 2.6 Dual-Core Intel Xeon 4GB memory
1x 2Ghz xserve Dual-Core Intel Xeon 4GB memory

Fiberchannel 12 TB XSAN.

Time Elapsed: 0:05:53

*Encode test 2*
Same HD video converted using 1 machine 2.6 Ghz dual-core intel Xeon 4Gb memory

Time Elapsed: 0:39:39

The Encoding time was 6.7x faster, using 7 machines.

Here are the compression settings that I used.
Name: DV 24FPS
Description:
File Extension: mov
Estimated file size: 2.09 GB
Audio Encoder
16-bit Integer (Big Endian), Stereo (L R), 48.000 kHz
Video Encoder
Format: QT
Width: 720
Height: 480
Pixel aspect ratio: NTSC CCIR 601/DV (16:9)
Crop to: Letterbox area of source
Padding: None
Frame rate: 24
Frame Controls: Automatically selected: Off
Codec Type: DV/DVCPRO - NTSC
Multi-pass: Off, frame reorder: Off
Scan Mode: Progressive
Aspect Ratio: 4:3

Pixel depth: 24
Spatial quality: 50
Min. Spatial quality: 0
Temporal quality: 0
Min. temporal quality: 0
Text Overlay
Position: Lower Right--Title Safe
Alpha: 0.500
Overlay Text: © Blah Blah Blah Pictures Ltd. Not to be duplicated by any process.
Text Color: r:0.8869, g:0.8869, b:0.8869
Font: Helvetica, 16

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