Quote Originally Posted by litemover
I would have though DANNY has told me not to and that photojpeg is not optimized for dual proccessors. He tols me that it would be slower. I'm going to start using photo Jpeg now, it looks alot nicer and I can work with it in RT while editing.

How bout the blackmagic codec Richard? I'd love to start using that codec as it is extremely fast to encode and great looking?

Best,
Christian Choi
Photojpeg is slower than dv codecs at the same resolution and compression rate - by about twice-
DV doesnt work at any other resolution than 720x576 or 720x480. So you cannot use dv at 720p or 1080p.
You need to compare codecs that will do this....

this doesnt matter nearly so much when you are only playing one or 2 layers.
( you cannot playback 4 layers of photojpeg content. - it simply takes too long to decompress the frames.
If you need 4 layers to playback at 25/30fps you have NO choice but to use DV-NTSC (30fps) - there are no other options. Nothing else works. )

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but at 1080p resolution photojpeg is 2 1/2 times faster than pixlet.
It takes 20milliseconds to decode one photojpeg 50% frame at 1080p res - 50ms for Pixlet 50%.
And at 720p resolution is takes 10ms for a photojpeg frame at 50%, and 20ms for a pixlet frame.

This chart shows single layer decompress times;
http://chaldee1.gotadsl.co.uk/~richa...ttachmentid=22

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Blackmagic is just an uncompressed codec (YUV encoded ), nothing special- means huge files. And doing any kind of uncompressed work is really not noticeable in this environment- and its 60GB/hr - so you dont get much .

So this is the file to use if you have an 8 disc scsi array and need to do 1080p uncompressed. Data rate ~100-150MB/s!

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Whether or not photojpeg is optimised for multiprocessors- is speculation from me based on reading between the lines of quicktime developer's documentation.
In this documentation - they talk about specific changes to the DV codec to optimise it for dual processors- they dont talk about other codecs like this.
DV -is the core codec for final cut and editing.
So it would make sense to use development resources to make this work as well as possible.

This document is "Whats new in QT 6.5". I dont think this information is in here - i think its in an earlier revision:
http://developer.apple.com/documenta...6_5/index.html
This is the form of the smoke signals one receives from apple.