Eric Werness wrote:
When I rebuilt my system around when 0.16 came out, I tried 2.6 with very little success (all videos playback stuttered - no obvious reason why). Changing the driver is my last resort given how much trouble I've had with it in the past, but I may have to try that if nothing else comes up...
I upgraded my driver from 1.5 to 1.6 and it didn't seem to help anything.
I looked through hdtvrecorder.{cpp,h} again to see what'd changed, and one thing jumped out at me - the buffer size. In 0.16, the packet buffer was sized to 255868 bytes = 1361 packets. A comment indicates that this is about 1/10 of a second at max data rate. In 0.17, the buffer is sized to 128 packets = 23.5KB, which is only enough for a little under 10ms at the same data rate. I recompiled libmythtv with the former packet size, and recording is much better.
Does anyone know why this change was made? My best hand-waving explanation is that the 10ms timer tick on 2.4.x isn't good enough to keep a (10-epsilon) ms buffer full, but the 1ms timer tick on 2.6 is. I guess I should try upgrading my system to 2.6.x again...
~Eric _______________________________________________ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
