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Also if h264, wmv and flv are unconstrained formats why would Adobe constrain them to certain frame rates in CS5. Seems like a basic feature thats been around for years has been disabled.
You misunderstand completely. Adobe is not forcibly constraining them at whim, only specific sub-sets of these formats are constrained which Adobe is obeying, having to do with how these formats themselves provide oprtimized presets for playing back certain standard resolutions more efficiently plus, naturally, some things not working natively in a 64bit environment and Adobe having to work around that as well. For H.264 all the magic is in the MPEG profile levels - choose 5.1 and you're good to go and free to determine any custom resolution and framerate. For WMV, the trick is to simply choose the correct WMV version (9 or above) and manually override all the framerates in teh encoder panel. Very much the same applies to FLV. What you have in mind, should be perfectly doable you just need to understand some of the limitations of the formats thmeselves and magle them as needed.
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If you want complete control of your highly compressed codecs open your After Effects project in Adobe Media encoder. Dynamic Link will open up and you can load your comps directly in the media encoder. You can then choose any format, frame size, or codec you want. This is the only way you can go directly from AE to a multi-pass render. You'll find that the quality is better and it will save you time.
Thanks for reply Mylenium, much appreciated. I dont think I do mis understand completely however.
I understand some formats are constrained such as mpeg. And some wmv formats maybe constrained in some ways, but to quote Adobe online help
"In After Effects CS5, there is a known issue that causes WMV and FLV output frame rates to be constrained unnecessarily."
I have also found the same issue with H264 format.
the online help goes on to say
"By creating an output module template and applying this template to a render item, you bypass this bug."
Unfortunately in my experience creating an output module template does not bypass the bug, but it makes it worse.
The same projects worked fine and rendered correctly in CS3 as flv, h264 and wmv. The render issues occur in CS5. Like you say Adobe has the 64-bit environment to contend with.
When you say manually over ride the frame rates in the encoder panel I guess you are referring to Adobe Media Encoder which is an option and maybe would give better quality results too.
good idea Rick, I hadn't realised you can open After Effects projects in Adobe Media encoder. Like you say the quality will be better too, I'll give it a shot.
Ooops I've dug out my old wmv files rendered from CS3 and it seems they also rendered at 25 fps, not 20fps, I just didnt notice. How embarrassing, I appear to have been spouting nonsense.
Apologies one and all, . . can u pass me that humble pie please . . mmmm, yummy