Marc,
Oh, we've discussed streaming performance plenty here over the years.
The critical issue in QuickTime is to use a codec that has a native
packetizer, so it can do some kind of loss recovery with dropped packets.
I've got a whole thing about it in my book. But basically, for streaming
you want to use one of:
Video: Sorenson Video 2, Sorenson Video 3, MPEG-4, H.263
Audio: QDesign Music 2, PureVoice, MPEG-4
For client hardware scaling, SV3 will turn off image smoothing on slower
machines. For bandwidth scaling, this is a BIG hole in QuickTime compared
to the other formats today. The only real option is to use Sorenson Video
3.1 Pro B-frames, which give you a scalability mode where data rate can drop
~25% and frame rate by half.
So, if you are targeting QT6 playback with a real-time stream, the best
combination is SV 3.1 Pro video with B-frames and MPEG-4 audio.
Ben Waggoner <http://www.benwaggoner.com>
Compressed Video Consulting, Training, and Encoding
My Book: http://www.benwaggoner.com/books.htm
Cleaner Tutorial: http://www.saferseas.com/navseries/adclean.html
Compression Books: http://www.benwaggoner.com/bookshelf.htm
on 11/22/02 3:54, Marc Jaeckle at email@hidden wrote:
> People do talk a lot about the quality of codecs on this list but
> everyone only seems to concentrate on how well the videos look when
> they play them back from their local disks (correct me if I'm wrong).
>
> Has anyone compared current codecs/technologies on how they behave in
> lossy networks or how well they scale on different client hardware
> (complexity scalability) or adapt to changing bandwidth?
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