Just wanted to throw my workflow out there to do with compressing video for the web (progressive download)
I'm new to it- reasonably happy with my results but thought i'd run a few things up the flagpole.
I export out of avid as QT movie (animation best quality) 320x240 and select sq pixel 16x9.
Sorenson- I just use the presets- Large- about 900kpb/s, medium about 400kpb/s, small about 200 kpb/s. This encompasses QT, Windows media, MPEG4 and Real Media.
1: the presets though a little "furry looking" seem a fair quality but is it worth squeezing a little more out of them? (I'm working in dv25-PAL)
2: In regards to 400kb/s what can this file type be used for? reading around the forums here suggests 200 kpbs for dial up and around that 900kb/s for broadband.
3: is it worth deinterlacing the files being they will play on progressive computer monitors?
4: the producer has enquired with me about increasing the screen size of the 200kb/s file... is it worth trying this or should dial up people just have to deal with a tiny size?
1.) You could try tweaking, but depending on the codec and source, you might not be able to squeeze much more out of it. Make sure you have two-pass and VBR selected.
2.) You are correct in that the "medium" could be left out if necessary. You certainly want to have both a "high" and "low" quality version available, and medium is generally there for dial-up users who want something better than the low version, but don't want to spend the time to download the high version.
3.) Yes, I would recommend deinterlacing.
4.) At 24Kbps, the largest I would go is a total of under 80000 pixels (W x H). You could bump that up to around 100000 total pixels if you were to use a bit rate around 35 - 40Kbps (~300kbps).