[judas beast] “Data rate I set limited to around “150 kbits/sec” (i used to leave it set to “672 kbits/sec” as default but found by lowering this value i got much smaller file sizes without much loss of quality) – frame size is set by default to: 480×360, I leave this alone.”
Generally a data rate of 150kbps is going to be WAY too low for a 480×360 frame size but it really depends on what’s happening in the content.
Data rate combines audio and video. The H.264 High Broadband preset is 800kbps combined in both Quicktime and Compressor.
I used my own test file (DV, self contained export from FCP to my desktop) and used the Quicktime Broadband High setting in QT and in Compressor and the both look EXACTLY the same, have the same file size/data rate.
Sorry, but I can’t help but think you’re doing something other than using the same setting in Quicktime Conversion vs export to Compressor.
If you send me your source I can do a test and send you back the encodes if you’d like.