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List:       mjpeg-users
Subject:    [Mjpeg-users] lavrec on x64
From:       Bernhard Praschinger <shadowlord () utanet ! at>
Date:       2008-09-20 11:36:23
Message-ID: 48D4E037.6070503 () utanet ! at
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Hallo

I have after 5 years upgraded my system to a new one. I am running a 64 
bit kernel. Have compiled the mjpegtools. Not the kernel, still using 
the opensuse 11.0 kernel: 2.6.25.5-1.1. I have 4GB of RAM in the machine.

I have discovered a problem with lavrec. It fails with that error message:
 > lavrec -f a -i P -d 1 -q 55 -a 0  test03.avi -v 2
   INFO: [lavrec] Recording parameters:
    INFO: [lavrec] Output format:      AVI
    INFO: [lavrec] Input Source:       S-Video PAL
....
++ WARN: [lavrec] Closing file(s) and exiting - output file(s) my not be 
readable due to error
**ERROR: [lavrec] Error syncing on a buffer: Timer expired
    INFO: [lavrec] Opening output file test03.avi
[2]+  Done                    xawtv -c /dev/video
Segmentation fault (core dumped)
---END---

dmesg give that information:
Buz[1]: jpg_sync() - timeout: codec isr=0x04
lavrec[5148]: segfault at 7fe004d91000 ip 7fe006af85ad sp 41beeb18 error 
4 in liblavfile-1.9.so.0.1.1[7fe006af3000+13000]

When I analyze the crash dump with ddd I get that information:
#0  scan_jpeg (jpegdata=0x7f5643554000 <Address 0x7f5643554000 out of 
bounds>, jpeglen=0, header_only=0) at lav_io.c:126
/home/bernhard/download/cvs/mjpeg_play/lavtools/lav_io.c:126:3378:beg:0x7f56452bb5ad
(gdb) print jpegdata
$1 = (unsigned char *) 0x7f5643554000 <Address 0x7f5643554000 out of bounds>
(gdb) list 'jpegdata'
Line 109 of "lav_io.c" is at address 0x7f56452bb540 <scan_jpeg> but 
contains no code.

A backtrace gives me that information:
(gdb) bt
#0  scan_jpeg (jpegdata=0x7f8ac5b24000 <Address 0x7f8ac5b24000 out of 
bounds>, jpeglen=0, header_only=0) at lav_io.c:126
#1  0x00007f8ac788c76c in lav_write_frame (lav_file=0x614510, 
buff=0x7f8ac5b24000 <Address 0x7f8ac5b24000 out of bounds>, size=0, 
count=1) at lav_io.c:410
#2  0x00007f8ac7aa6c4e in video_captured (info=0x607010, 
buff=0x7f8ac5b24000 <Address 0x7f8ac5b24000 out of bounds>, size=0, 
count=1) at liblavrec.c:729
#3  0x00007f8ac7aa7a35 in lavrec_record (info=0x607010) at liblavrec.c:2116
#4  0x00007f8ac7aa80bd in lavrec_capture_thread (arg=<value optimized 
out>) at liblavrec.c:2193
#5  0x00007f8ac7190040 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f8ac64370cd in clone () from /lib64/libc.so.6
---END---

No I am a bist lost here. Has anyone a hint how where I should take 
further looks to find out more about the problem. And fix it ?

That is not a buz specific problem I it also happen with the DC30.

auf hoffentlich bald,

Berni the Chaos of Woodquarter

Email: shadowlord@utanet.at
www: http://www.lysator.liu.se/~gz/bernhard

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