On Sat, Mar 28, 2009 at 11:27 PM, Andy Walls <awalls@xxxxxxxxx> wrote: > On Mon, 2009-03-23 at 06:52 -0700, Corey Taylor wrote: >> > Andy, >> >> > I am noticing an improvement in pixelation by setting the bufsize to >> > 64k. I will monitor over the next week and report back. I am running 3 >> > HVR-1600s and the IRQs are coming up shared with the USB which also >> > supports my HD PVR capture device. Monday nights are usually one of >> > the busier nights for recording so I will know how well this holds up. >> >> > Thanks for the tip! >> >> > Brandon >> >> Hi Andy and Brandon, I too tried various different bufsizes as suggested and I still see very noticeable pixelation/tearing regardless of the setting. >> >> I even upgraded my motherboard this past weekend to an Asus AM2+ board with >> Phenon II X3 CPU. Still the same problems with the card in a brand new >> setup. >> >> I also tried modifying the cx18 source code as Andy suggested and that >> made more debug warning show up in my syslog, but still did not >> resolve the issue. Haven't tried this yet with the new motherboard >> though. >> >> Is it possible that this card is more sensitive to hiccups in the >> signal coming from the cable line? Or interference from other close-by >> cables and electronic equipment? >> >> When recording/watching Live TV through MythTV, I see that ffmpeg is >> constantly outputting various errors related to the video stream. I >> can post those here if you think it's relevant. >> >> Shoud I just return this card and get one with a different chipset? Or >> do you think driver updates can solve the issue? >> >> I'm happy to hold on to this card if it means I can contribute in some >> way to fixing the problem, if it's fixable : ) > > Corey and Brandon, > > I found a race condition between the cx driver and the CX23418 firmware. > I have a patch that mitigates the problem here: > > http://linuxtv.org/hg/~awalls/cx18/rev/9f5f44e0ce6c > > I think the final form of the patch could be better. However, this > patch essentially eliminated any artifacts I was getting playing back > digital TV. I also had positive results running mplayer without the > "-cache" command line for both digital and analog captures. > > I haven't tested on a single processor machine, nor in a multicard > setup, but things looked good enough that I thought it ready for test by > others. > > Let me know if it helps or not. > > Regards, > Andy > > Hi Andy, I have cloned this tree and loaded on the server. I'll let you know over the next couple of days if there is any improvement. Thanks! Brandon -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
