Here's the backtrace from just after a channel change failure: [mpegvideo_xvmc @ 0xb7992888]concealing 8160 DC, 8160 AC, 8160 MV errors [mpegvideo_xvmc @ 0xb7992888]concealing 8160 DC, 8160 AC, 8160 MV errors *** glibc detected *** double free or corruption (!prev): 0x0842ced0 ***
Program received signal SIGABRT, Aborted. [Switching to Thread -1250952272 (LWP 20234)] 0xffffe410 in __kernel_vsyscall () (gdb) backtrace #0 0xffffe410 in __kernel_vsyscall () #1 0x4e098955 in raise () from /lib/tls/libc.so.6 #2 0x4e09a319 in abort () from /lib/tls/libc.so.6 #3 0x4e0cbf9a in __libc_message () from /lib/tls/libc.so.6 #4 0x4e0d2528 in _int_free () from /lib/tls/libc.so.6 #5 0x4e0d2afa in free () from /lib/tls/libc.so.6 #6 0xb77b42fd in av_free (ptr=0x0) at mem.c:123 #7 0xb7a2b53d in av_destruct_packet (pkt=0x814bd88) at utils.c:172 #8 0xb7d23103 in av_free_packet (pkt=0x814bd88) at avformat.h:71 #9 0xb7d29a8d in AvFormatDecoder::GetFrame (this=0xb440d008, onlyvideo=0) at avformatdecoder.cpp:1656 #10 0xb7c08357 in NuppelVideoPlayer::GetFrame (this=0x8148690, onlyvideo=0, unsafe=false) at NuppelVideoPlayer.cpp:839 #11 0xb7c0d7aa in NuppelVideoPlayer::StartPlaying (this=0x8148690) at NuppelVideoPlayer.cpp:2018 #12 0xb7cb8904 in SpawnDecode (param=0x8148690) at tv_play.cpp:204 #13 0x4e2b93ae in start_thread () from /lib/tls/libpthread.so.0 #14 0x4e137b6e in clone () from /lib/tls/libc.so.6 Maybe that'll help somebody more than it helps me :| -bz On Tue, Mar 15, 2005 at 11:46:32PM -0500, Brad Zawacki wrote: > I've got a motorola 6200 cable box that I recently hooked to my mythbox > via firewire. I initially had problems with the connection, but CVS > fixed that with the addition of broadcast connections. It mostly works > now, and with xvmc enabled I'm able to watch live HD on my 1.8Ghz p4 > machine at about 70% CPU usage. > > The problem is that xvmc causes problems with channel changes on the firewire > connection. The 6200ch script executes fine, and the backend has no > errors, but the frontend either prebuffer-waits forever or dies. > > Best case with '-v playback' I get this: > > 2005-03-15 23:26:58.602 waiting for prebuffer... > 2005-03-15 23:26:58.602 rate: 29.97 speed: 1 skip: 1 = interval 33366 > 2005-03-15 23:26:58.603 Set video sync frame interval to 33366 > [mpegvideo_xvmc @ 0xb79fd854]Warning MVs not available > 2005-03-15 23:26:58.656 No codec for stream index 1 > 2005-03-15 23:26:58.657 No codec for stream index 1 > 2005-03-15 23:26:58.658 No codec for stream index 1 > 2005-03-15 23:26:58.658 No codec for stream index 1 > 2005-03-15 23:26:58.736 prebuffer wait timed out.. > 2005-03-15 23:26:58.737 waiting for prebuffer... > ... > > ...and it goes on forever like this, with the screen frozen. > Worst case I get this: > > [mpegvideo_xvmc @ 0xb79fd854]ac-tex damaged at 5 0 > [mpegvideo_xvmc @ 0xb79fd854]Warning MVs not available > [mpegvideo_xvmc @ 0xb79fd854]ac-tex damaged at 3 1 > [mpegvideo_xvmc @ 0xb79fd854]ac-tex damaged at 0 2 > 2005-03-15 23:31:02.801 prebuffer wait timed out.. > 2005-03-15 23:31:02.802 waiting for prebuffer... > [mpegvideo_xvmc @ 0xb79fd854]ac-tex damaged at 0 3 > [mpegvideo_xvmc @ 0xb79fd854]ac-tex damaged at 0 4 > [mpegvideo_xvmc @ 0xb79fd854]ac-tex damaged at 10 5 > ... > 2005-03-15 23:31:06.374 prebuffer wait timed out.. > 2005-03-15 23:31:06.374 waiting for prebuffer... > *** glibc detected *** double free or corruption (!prev): 0x0a239510 *** > Aborted > > ...and the front end goes away, sometimes taking the backend with it. I > 'think' that the first example happens when changing to a SD channel, > and the second when changing to a HD channel, but I'm not positive that > it's the difference. > > Google hasn't helped me much with the glibc thing, but it seems like it > might be a significant library conflict. I don't know how to fix it. > > > Any help is appreciated. > -BZ > _______________________________________________ > mythtv-users mailing list > mythtv-users@mythtv.org > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
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