On Saturday 30 June 2007 12:58, Mike Isely wrote: > On Thu, 28 Jun 2007, Mark Goldberg wrote: > > > It also seems that there still may be a slight audio delay or video > > delay, not enough to obviously tell, but enough so you can tell > > something is not quite right. Is there any adjustment for this in the > > encoding side. I know you can adjust it during playback, but it would > > be nice to have it recorded ideally. > > There isn't any adjustment in the driver. The video and audio are > combined into mpeg within the device itself not in the driver (that > after all is the entire point of this device), and I don't recall seeing > any adjustments provided by the cx23416's API.
FWIW, I've noticed audio/video sync problems, too, although they're not severe. The problem is most noticeable for me on WGBH, which is the PBS station delivered by my cable provider. I suspect that WGBH's sync is a little off and the PVR-USB2 is also a little bit off. I usually get good sync by adjusting about 60-100ms in MythTV's playback, although the amount I need to adjust seems to vary from one recording to the next. (I don't know if that variability is from variability on the WGBH/Cox Cable or PVR-USB2 side.) I suspect that about half of the 60-100ms is from the PVR-USB2 and the other half from WGBH/Cox. I only mention this because the problem is much less noticeable when I record using my AverMedia AverTV M150, which is an internal card based on the CX88 "Blackbird" chipset. I suspect that the PVR-USB2's chipset is just a bit off in this respect (probably about 30ms, which is barely noticeable if the original signal's sync is good). If there's no way for you to adjust this given the chip interfaces, then that's just the way it is. -- Rod Smith, [EMAIL PROTECTED] http://www.rodsbooks.com Author of books on Linux, FreeBSD, and networking _______________________________________________ pvrusb2 mailing list [email protected] http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
