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Joe Mitchell
CS4 HD render Help
on Dec 29, 2009 at 2:38:18 pm

Hi all looking for some advice my 3 year old precision just turned itself into a foot rest yesterday so until Dell get me a shiny alienware replacement in 3 weeks :-( i'm stuck on my laptop. Bad times.

I'm running AE CS4 and have about 5 mins of HD footage, source is 1080i but i'll be rendering down to 720. I have some Action essentials footage and some misc fx added.

I need too get a decent quality 720 render under 2GB. I had the render settings on my now dead desktop of course i cant remember them off the top of my head. Now whenever i try to render anything no matter how small using the default -

Output module video for windows HDV/HDTV 720 29.97, Stretch Quality High under format option i have no video compression selected. Any idea as to the best compressor to use?

thanks in advance any help greatly appreciated

Joe


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Dave LaRonde
Re: CS4 HD render Help
on Dec 29, 2009 at 5:07:45 pm

[Joe Mitchell] "Output module video for windows HDV/HDTV 720 29.97, Stretch Quality High under format option i have no video compression selected. Any idea as to the best compressor to use? "

Nope, sorry. I'm a Mac guy. Have you considered using the same compression that the person who receives your work might want?


[Joe Mitchell] "I'm running AE CS4 and have about 5 mins of HD footage, source is 1080i but i'll be rendering down to 720. I have some Action essentials footage and some misc fx added."

Well, there's a recipe for disaster right there. Almost EVERYONE mistakes HDV for HD. There's a big difference between the two in AE. Even if you've never had any problems with your footage before, you're on a new machine and life is different. so read this:

Dave's Stock Answer #1:

If the footage you imported into AE is any kind of the following -- footage in an HDV acquisition codec, MPEG1, MPEG2, mp4, m2t, H.261 or H.264 -- you need to convert it to a different codec.

These kinds of footage use temporal, or interframe compression. They have keyframes at regular intervals, containing complete frame information. However, the frames in between do NOT have complete information. Interframe codecs toss out duplicated information.

In order to maintain peak rendering efficiency, AE needs complete information for each and every frame. But because these kinds of footage contain only partial information, AE freaks out, resulting in a wide variety of problems.


Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Joe Mitchell
Re: CS4 HD render Help
on Dec 30, 2009 at 10:10:18 am

Hi Dave thanks for the reply the footage is indeed h.264/MPEG-4
which makes it HDV??? So a different codec is needed?


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Dave LaRonde
Re: CS4 HD render Help
on Dec 30, 2009 at 5:03:35 pm

[Joe Mitchell] "...footage is indeed h.264/MPEG-4 which makes it HDV?"
I'd bet money this footage is still in the acquisition codec of the camera that shot it. But the crucial point is that it's h.264, so it's temporally compressed. The Adobe Marketing Department says AE supports such footage, but it's just a half-truth: you can look at it, but you can't actually DO anything with it.

It's sort of like the commercial where the banker gives the little girl a new bike, but she can't ride it beyond the 6'x3' line on the floor. Bad Adobe!



[Joe Mitchell] "So a different codec is needed?"
Absolutely. I'm a Mac guy, so I'd convert it into QT movies in either the Animation or PNG codecs at best quality; they're lossless, y'know. But since you live in Windows-Land, I don't know what codec you should use. But you can use Adobe Media encoder to do the job. I'm pretty darned sure you can use it to batch-process the footage -- very handy.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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