Any 8 core Mac Pro owners out there? I've done some testing and found out that Compressor 3 or 3.0.1 is very slow to transcode DVCPRO HD footage compared to a dual 2.7GHz G5. The problem lies with the 90-150 minute DVD presets in Compressor. My G5 is doing a 6 minute encode of DVCPRO HD 720p footage to DVD MPEG-2 90 minute preset in 20 minutes. The Mac Pro 8 core is taking 52 minutes. I've wiped the system and tried virtual clusters still no speed difference. I've narrowed the problem down to 90-150 minute DVD presets when transcoding DVCPRO HD 720 or 1080 footage. The problem doesn't exist for the other formats including MPEG-1 or HD DVD presets. I would like to verify if this is a genuine problem with the 8 core Mac Pro's. Also DV or DVC Pro 50 footage works with the 90-150 minute MPEG-2 presets. The slow down was with DVCPRO HD and Apple Pro Res codecs.
DVCPRO HD slow to transcode in Compressor on 8 Core Mac Pro's
- Thread starter andrae
- Start date
Patrick Sheffield
Member
And with the virtual clusters, according to Activity Monitor, is it maximizing all your CPUs?
Patrick
Patrick
Yes I'm getting at least 750% CPU usage with 4 instances of Compressord running. This slow down doesn't manifest itself with DV or DVCPRO 50 footage. I've tried many different DVCPRO HD 720/1080 and Apple Pro Ress 422 HQ clips.. and they are all slow compared to the dual 2.7GHz G5.... very very slow. The G5 is finishing the job significantly faster with all these HD clips. Also when the cluster is connected to the G5 you can see the G5 whooping the heck out of the Mac Pro by finishing its segments in half the time or less... way less.
My system is a Mac Pro 8 Core with 9GB of RAM. 2x512 and 2x4GB sticks. Mac OS X 10.4.10 with an AJA KONA LHe capture card.
I've run the test with only 1GB of RAM, with 8GB of RAM... to eliminate the chances of it being memory related. BTW my friends Mac Pro 2.66GHz with 1GB of RAM is finishing the same 6 minute DVCPRO HD clip to 90 minute MPEG-2 DVD preset in about 10 minutes. A thread on creativecow.net was complaining of the same issue: http://forums.creativecow.net/thread/155/866630
I've started my own thread on Apple's Discussion board's for Compressor: http://discussions.apple.com/thread.jspa?threadID=1098151&tstart=0
My system is a Mac Pro 8 Core with 9GB of RAM. 2x512 and 2x4GB sticks. Mac OS X 10.4.10 with an AJA KONA LHe capture card.
I've run the test with only 1GB of RAM, with 8GB of RAM... to eliminate the chances of it being memory related. BTW my friends Mac Pro 2.66GHz with 1GB of RAM is finishing the same 6 minute DVCPRO HD clip to 90 minute MPEG-2 DVD preset in about 10 minutes. A thread on creativecow.net was complaining of the same issue: http://forums.creativecow.net/thread/155/866630
I've started my own thread on Apple's Discussion board's for Compressor: http://discussions.apple.com/thread.jspa?threadID=1098151&tstart=0
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