Well, after experimenting with codecs with limited success I remembered the 9.mp4 video that comes with the N900 - looks great and runs great. I examined it and it's mp4a/mp4v with bitrates up to 4mbit! I tried that codec compo, and at 2mbit video and 128kbit audio it runs totally smooth most of the time, but with a minor hickup here and there, which could be due to something running in the background on the N900 that I have no control of. Is there some way of running the decoding thread on the N900 with high priority or something? And bear in mind I've done the testing running the N900 @ 900mhz. I can try going back down to 600mhz for testing purposes sometime in the weekend. Anywho, I suspect that the 9.mp4 run through the built in media player utilizes some hardware acceleration that doesn't seem to get activated when playing through Knots, as I can't get it to run smooth at the same high bitrates (~4mbit). But hey, it looks awesome at 2mbit as well, and the encoding part is apparently lighter than x264, as there's on avg. an even 10-20% load on my 4 cores when chewing through 1080p x264 movies with ~20mbit rates. Fairly happy camper here! Only thing missing is a thicker pipe so I can stream this over the internet