Today's curiosity is that an Avid DNxHRHQX 4096_2160 Rec 709 sequence that was rendered to ProResHQ with a safe color limit effect on an upper Track took 6 hours and 10 minutes to export to DPX 10bit yesterday.
Today the same sequence with the color adapters/LUTs removed and all symphony color removed and completely unrendered is estimating 3 hours and 50 minutes to export to DPX 10bit. There is a bunch of BCC pixel fixer effects and some paint effects with clones, blurs and darken/darken only objects. I'm surprised the estimate is so much faster than the fully rendered sequence.
Everything drive wise and computer wise is the same. Does this indicate that processing DNxHRHQX media to DPX is much easier than ProResHQ to DPX? I realize removing all the LUTs and symphony color correction eases the load on the CPU but I would think given the entire sequence was rendered to ProResHQ already that wouldn't really draw any extra CPU load.
Am I wrong to think that a fully rendered to ProResHQ sequence should export faster than an unrendered DHxHRHQX sequence? In activity monitor yesterday's export showed a lot of memory presure but today it's staying green in the Memory Pressure graph. Is ProResHQ harder for Avid to Process or convert for a DPX export. I would have thought that the unrendered BCC Pixel fixer effects would take a lot longer than the fully render sequence. I wonder if Avid's code is so much better optimized for the DNxHRHQX media it accounts for the difference.
Both the renders and the HQX media are coming from a fibre 4Gig san mp jbod so the basic source media path is the same for both sequences. Very odd behavior IMHO. In past experience the unrendered uncolored sequences take longer to export. Hmmmmm
John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net
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Posted by: John Moore <bigfish@pacbell.net>
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