I solved my problem. After removing my BT (dumb) card and replacing it with an (mpeg) PVR150, I was having the exact same "huccups" with it. Recompiling my kernel (v2.6.13.2) with the following updates seemed fixed it 110%: ~~~~~~~~~~~~~~.config optiosn~~~~~~~~~~~~~~ CONFIG_HZ_1000=y CONFIG_HZ=1000 and CONFIG_PREEMPT=y CONFIG_PREEMPT_BKL=y ~~~~~~~~~~~~~~~Kernel Docs~~~~~~~~~~~~~~~ CONFIG_HZ_1000: 1000 HZ is the preferred choice for desktop systems and other systems requiring fast interactive responses to events. CONFIG_PREEMPT: This option reduces the latency of the kernel by making all kernel code (that is not executing in a critical section) preemptible. This allows reaction to interactive events by permitting a low priority process to be preempted involuntarily even if it is in kernel mode executing a system call and would otherwise not be about to reach a natural preemption point. This allows applications to run more 'smoothly' even when the system is under load, at the cost of slighly lower throughput and a slight runtime overhead to kernel code. Select this if you are building a kernel for a desktop or embedded system with latency requirements in the milliseconds range. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Hope that helps someone in the future! Todd ----- Original Message ----- From: "Todd" <nospam@xxxxxxxxxxxxxxx> To: <linux-dvb@xxxxxxxxxxx> Sent: Monday, October 03, 2005 2:42 PM Subject: [linux-dvb] FW: "prebuffering pauses" newair2pccards(AirStar-HD5000) >I am wondering if anyone is seeing this...and if they know how to fix it. > > Summary: Using MythTV the Audio/video is choppy during playback (I can't > tell if it is recorded this way or not)...in my errors I get a stream of > prebuffering audio errors. I think there might be something wrong with > the capture/recording (and not playback) because: > 1. Both my myth frontends do this while maintaining <10% CPU/RAM/Disk IO. > 2. The Windows DSMyth drivers crash trying to play the recording. > 3. Recording keeps CPU load <.2...Disk/RAM/etc always < 10% > 4. Other capture cards work great in the same machine. > 5. Signal is strong and does not drop. > > Other clues: Channels with no audio (yes I have one; KiroDT2) have no > pause...smooth video. azap output: > tv:~# azap KIRO-DT > using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' > tuning to 623028615 Hz > video pid 0x0031, audio pid 0x0034 > status 00 | signal 3cdc | snr 0000 | ber 00000000 | unc 00000000 | > status 1f | signal 952e | snr ff98 | ber 00000000 | unc 00000000 | > FE_HAS_LOCK > status 1f | signal 94e2 | snr ffc8 | ber 00000000 | unc 0000003c | > FE_HAS_LOCK > status 1f | signal 9508 | snr ffbe | ber 00000000 | unc 00000000 | > FE_HAS_LOCK > status 1f | signal 94e2 | snr ffc0 | ber 00000000 | unc 00000000 | > FE_HAS_LOCK > status 1f | signal 9496 | snr ffc3 | ber 00000000 | unc 00000000 | > FE_HAS_LOCK > > ...And it stays that high. > > Any help would be greatly appreciated. > ToddD > > ----- Original Message ----- > From: "Todd" <nospam@xxxxxxxxxxxxxxx> > To: "Discussion about mythtv" <mythtv-users@xxxxxxxxxx> > Sent: Monday, October 03, 2005 1:08 PM > Subject: Re: [mythtv-users] Re: I received the new > air2pccards(AirStar-HD5000) FINALLY! > > >> Have you found any resolution to "prebuffering pauses"? I am seeing the >> same thing and can't seem to find a way to resolve it. It is starting to >> make me crazy. I have tried all kinds a transcoding setings....all kinds >> of stuff, nothing seems affect the problem. >> >> Thanks in advance, >> Todd >> >> ----- Original Message ----- >> From: "Paul B. Henson" <henson@xxxxxxx> >> To: "Discussion about mythtv" <mythtv-users@xxxxxxxxxx> >> Sent: Monday, September 26, 2005 2:37 PM >> Subject: Re: [mythtv-users] Re: I received the new air2pc >> cards(AirStar-HD5000) FINALLY! >> >> >>> On Fri, 23 Sep 2005, Kevin Stanton wrote: >>> >>>> Apparently a few have gotten this to work. New info here: >>>> http://www.hd5000.com/ >>>> I am interested in hearing reports from ANYONE who has this card >>>> working, and can compare it to anything else. >>> >>> I finally got my three cards working over the weekend. However, I >>> haven't >>> tried any of the other cards available and can't really make a >>> comparison. >>> >>> The cards themselves seem to work fine with Taylor's latest driver >>> patch, >>> and mythtv-svn as of this weekend recognized them and had no problems >>> recording programs. >>> >>> I'm still fighting with the frontend which is complaining about >>> prebuffering pauses and generating rather choppy video, but seem to have >>> no >>> issues with the cards themselves. >>> >>> >>> >>> -- >>> Paul B. Henson | (909) 979-6361 | http://www.csupomona.edu/~henson/ >>> Operating Systems and Network Analyst | henson@xxxxxxxxxxxxx >>> California State Polytechnic University | Pomona CA 91768 >>> >> >> >> -------------------------------------------------------------------------------- >> >> >> _______________________________________________ >> mythtv-users mailing list >> mythtv-users@xxxxxxxxxx >> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users >> >> _______________________________________________ >> mythtv-users mailing list >> mythtv-users@xxxxxxxxxx >> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users >> > > > _______________________________________________ > > linux-dvb@xxxxxxxxxxx > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb >
