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How choose codec for OFFLINE and REALTIME editing in Premiere?
Hello,
Normally I’m Avid user, but now I have a job which must be done in Premiere Pro 2. And I struggle with some basic problems.
Basically I have sources in non standard resolution (1280×960). But I want to edit low-quality, aspect corrected offline files, which I can edit in realtime in Premiere. “In realtime” means that I don’t want to have red bar above the timeline indicating need for rendering – I just want to place clips on timeline, trimm them and press spacebar to review edits. I don’t want to set workbar around a cut, press Enter, wait for prerendering and after all review my edit (and so on for every cut).
As far as I remember I always have problems with achieving realtime playback in Premiere (except DV codec).
As I remember this is only possible in Premiere with special hardware codecs or native DV codec.
But at first: I need edit this offline materials on laptop without any exotic hardware.
And secondly I must overcome DV codec limitations like fixed resolution, fixed bitrate and non-square pixel aspect.So now I’m at point of choosing right codec for making offline files from my client’s source files. Source files are 1280×960 1:1 pixel aspect ratio Quicktime JPEG2000 clips.
The main principles for offline codec are:
– ability to playback in Premiere’s timeline WITHOUT prerender with Enter key (in case of ordinary cuts, no effects of course)
– no fixed video resolution (because maybe I make offlien files with quater resolution of sources)
– no fixed pixel aspect ratio
– no fixed bitrate (because I need small files, quality doesn’t matters)So anyone know codec and/or preset for Premiere, which fullfil above requirements?
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2 Replies
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Well, a red bar doesn’t mean that you won’t be able to see things in real time, that mostly depends on the kind of processors, graphics and ram you are working with. For example, in desktop mode you can probably see real time high quality cuts and effects even on a core2duo and with that kind of resolution. For JPEG, I would do a test first.
Vince
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I can get real clean PIPs and transition using the DV-25 codec and the RT playback set at highest quality using and old Dual Core Pentium 4 at 3.4 GHZ. I can lay down a transition with a title and it looks great. It almost looks rendered. It will only look about 5%-10% better when render. The RT looks that good in highest quality. Those who are using quad cores have posted they get realtime PIPs and transition with HD codecs from Panasonic in highest quality. Your best bet is to get a good Core 2 Dual at 2.66 or even a Core 2 Quad at 2.66 GHZ with 2 GIGS of RAM. I think even if you set your Premiere Pro timeline project to uncompressed 320 X 240 you will still get the red bar when an effect is applied but you need not drop down the resolution of the original codec to get high quality RT effects provided you have a decent computer. If you have an old single core P4 at 3.0 GHZ then the RT will not be there.
I know Grass Valley makes the JPEG 2000 cameras but I don’t think Premiere Pro support that codec as of yet. I am not sure what software does. Edius from Grass Valley will support te JPEG 2000 codec of the new Infinity Cameras. Edius has much more RT that Premiere Pro and it is indeed true RT. There is no rendering back to tape and there is no red bar or preview quality option. Everything is true realtime 100% of the time.
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