Uploading 20 Gb. of raw footage?

[Paulo Jan]

Maybe. The default setting for the data rate is “automatic”, and I didn’t touch it. However, my understanding was that the deinterlacing in Compressor didn’t simply discard one field, as most crappy deinterlacers do, but did blend both fields to create the new image.

Paulo.

[Keith Pratt]

Paulo Jan: “However, my understanding was that the deinterlacing in Compressor didn’t simply discard one field, as most crappy deinterlacers do, but did blend both fields to create the new image.”

It does interpolate, but I wasn’t necessarily meaning detail in terms of image fidelity. If the compressor treats a pair of fields as a single frame, the combing is additional detail. If Compressor or Apple’s version of H.264 is unable to compress fields separately, ‘Automatic’ will yield a larger file in its attempt to preserve the “detail”.

If you don’t want the file size to free-wheel, set a target file size.

[Rafael Amador]

I agree with Keith.
Limit the data-rate, and always set K-frames AUTO.
The “Multi-pass” option is to let the compressor set an optimal number of K-frames.
If you limit the K-frames, you are screwing the “Multi-pass”, affecting size and compromising quality.

[Paulo Jan] “Maybe. The default setting for the data rate is “automatic”, and I didn’t touch it. However, my understanding was that the deinterlacing in Compressor didn’t simply discard one field, as most crappy deinterlacers do, but did blend both fields to create the new image.”
Whatever the method of de-interlacing, a Progressive frame has the same number than an Interlaced frame (two fields).
What is obvious is that, although the stream is passing the same amount of pixels/sec, the Interlaced stream is passing DOUBLE amount of PICTURES/sec. So the compressor may be adding more (double?) amount of k-frames/sec.
That would explain the different file size.
rafael

http://www.nagavideo.com

[Mark Petereit]

Is bribing a MIS student at a local university out of the question? I would think a major university would have pretty fat pipes. Hungry students are universal.