Sorenson Squeeze for Flash:
http://www.sorensonmedia.com/products/?pageID=1#ppc2
The same physics apply to any compressor. The more data you allow per second, the better looking an the larger your file will be. The differences is in the quality of the compressor. The better compressors can make better results in the same amount of data. Here's an example done with Sorenson tools at around 384kbits per second data rate.
http://www.journeyfortheheart.com/si...ifeofjames.php