[Graham Quince] “AE has provided the only way of batch encoding… I have to deal in quantity, far more than quality. “
Check out CS5’s Adobe Media Encoder — you might be able to use this for batch encoding.
If you can step away from WMV to h264 MP4, I’ve been really impressed with both the quality and speed of the Matrox CompressHD expansion card. It does 1080i HD with h264 faster than realtime.
[Graham Quince] “After Effects has always provided not only a good quality, low file-size compression for wmv, but until now (can’t comment on CS4) AE has provided the only way of batch encoding.”
I’m glad to hear you’re seeing good results in your compression; perhaps your footage and workflow is particularly suitable for single-pass encoding. In general, though, I think Dave’s and Michael’s advice is very sound:
AE can do multi-pass encoding when you use File > Export, but that’s only capable of rendering a single comp at time. If you use the Render Queue, you can export many comps at the same time, and with much more control over how AE renders; however, AE is not capable of multi-pass compression through the render queue.
Multi-pass compression makes your encodes look better by analyzing the source footage first, to figure out where the easy-to-compress parts are and where the hard-to-compress parts are. It will then adjust keyframe placement and vary the bit rate accordingly in the second pass. The result is a much cleaner and efficient compression than single-pass is capable of.
Even if you’re getting good results with single-pass encoding, you might get better results with multi-pass encoding: smaller file sizes, sharper video, better motion, reduced artifacts, and reduced banding.
Finally, if you have to deliver multiple different encodes of the same media, using AE to do it will force a time-consuming re-render (from scratch) of your original comp for each target encode, so rendering one intermediate and then encoding from that will actually save time.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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