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Uncompressed Quicktime
Sorry to be coming up with so many pesky questions, but I’m at the end of a long project, under the gun, and trying to learn fast. The final product will be played back from a G5 with a SATA drive array. It’s uncompressed 720p. I was wondering if I could export the sequence as a Quicktime and then drag that Quicktime back into a new sequence which I could then play back rather than playing back the original sequence. In theory this would be easier to play back since the processor and drives would have less work — not going after render files etc. Does this make sense? And would it work? Can Quicktime handle UC? Would I lose quality this way?
So many questions, so little time. Thanks for your forbearance. –Fred
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3 Replies
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Are you having trouble playing back the sequence now?
If not, why do all that?
And, for what it’s worth, if you render your entire sequence (all blue all the time)
it’s just about the same as doing what you are talking about doing. Going after
a few render files is much easier than going after scads of individual clip files.
You should always do this anyway, Render All, before outputting to anything.Dan
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Hello Fred,
Not sure about what you need to play back 720p, but I would guess to play uncompressed you would need faster drives..
But I CAN say that exporting and reimporting does help with the play back because the computer is not seeking all over the place, across all media drives for the media. It’s all in one file. And depending how you have your drives set up, can be in “One Location” so to speak..
I do this when I want to show people DV footage cut together without it droppin frames or if I’m recording to tape… DV exported, DV imported.. I’m told it’s lossless… I only use DV and my drives are regular ATAs.
Chris
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Yes, QuickTime handles uncompressed files. Final Cut Pro is just big interface for editing QuickTime movies.
What type of RAID do you have? What’s your frame rate of the 720P footage? Is it 8-bit or 10-bit?
(You really don’t need to answer these questions to me, but you should be asking yourself these questions as they all determine if your setup is really fast enough to do what you want it to do.)
DATA RATES
Uncompressed 10-bit 720/24P – 60MB/sec
Uncompressed 10-bit 720/60P – 150MB/sec
Uncompressed 8-bit 720/24P – 45MB/sec
Uncompressed 8-bit 720/60P – 111MB/secSo how fast is your RAID? You want it to be significantly faster than your video data rate. If it isn’t, I suggest exporting to DVCPROHD for your screening, just to make sure you don’t drop frames.
How did I know all of these data rates? A free data rate calculator!!!
https://www.aja.com/ajashare/AJA_Data_Rate_Calculator_v2.app.tar
How can you test the speed of your RAID? A free system tester!!!
https://www.aja.com/ajashare/AJA_KONA_System_Test_v2.app.tar
Good luck in all of your uncompressedness.
-Russ
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