Hi,
Sorry for posting to both marvel-linux and mjpeg-users lists - I'm not sure
whether this is a Marvel driver issue or an mjpegtools issue.
For some months, I've had an issue with lavrec on my Marvel G400 capture card.
I can record successfully, but when recording ends (either by the -t option
on the lavrec command-line or by pressing ^C) lavrec dies with a segmentation
fault. The recording is fine but any attempt to capture again just hangs,
unless I unload and reload the marvel drivers.
I've put the output of a typical lavrec command below. I've tried using read()
instead of mmap().
I've also included the dmesg output from loading the marvel drivers.
I've just tested with latest CVS of both driver_fb and mjpegtools ("cvs up"
within the last 15 minutes) and the issue is present. (I'd hoped it might
have gone away in CVS.) (Actually, latest mjpegtools CVS compile needed a bit
of help finding cpu_accel, then stopped in mpeg2enc but I was able to get
sufficient built to test it.)
I'm running stock kernel 2.6.10 (with the driver_fb i2c patch) and glibc
2.3.4.
Does anyone have any ideas/workarounds/etc?
Thanks,
Stephen
---- lavrec output ----
lavrec -v 1 -f a -i t -d 1 -q 50 -g 688x480+20+44 -t 10 -B -a 16 -r 44100 -s
-C europe-west:31 test.avi
Ok, found channel 31 with frequency 551250
INFO: [lavrec] Recording parameters:
INFO: [lavrec] Output format: AVI
INFO: [lavrec] Input Source: PAL TV-tuner
INFO: [lavrec] Decimation: 1
INFO: [lavrec] Quality: 50
INFO: [lavrec] Recording time: 10 sec
INFO: [lavrec]
INFO: [lavrec] MJPEG buffer size: 256 KB
INFO: [lavrec] # of MJPEG buffers: 64
INFO: [lavrec] Audio parameters:
INFO: [lavrec] Audio sample size: 16 bit
INFO: [lavrec] Audio sampling rate: 44100 Hz
INFO: [lavrec] Audio is STEREO
INFO: [lavrec] Audio input recording level: Use mixer setting
INFO: [lavrec] Level of correction for Audio/Video synchronization:
INFO: [lavrec] Lost frame compensation and frame drop/insert
INFO: [lavrec] Using mmap(2) system call for capture
INFO: [lavrec] Auto detecting input and norm ...
INFO: [lavrec] Unmuting tuner audio...
INFO: [lavrec] Image size will be 688x480, 2 field(s) per buffer
INFO: [lavrec] Got 64 buffers of size 256 KB
INFO: [lavrec] Getting audio ...
INFO: [lavrec] Opening output file test.avi
INFO: [lavrec] Recording time reached, stopping
INFO: [lavrec] Re-muting tuner audio...
Segmentation fault
---- kernel messages from "./iv" until lavrec crashes ----
msp3400: Unknown parameter `simple'
msp34xx: init: chip=MSP3410D-B4 +nicam +simple mode=simple
msp3410: daemon started
ks0127: attach: on-board video decoder
tuner: chip found at addr 0xc0 i2c-bus MAVEN:fb0
Linux video capture interface: v1.00
mgacore: Found MGA G400
tuner: type set to 3 (Philips (SECAM+PAL_BG) (FI1216MF, FM1216MF, FR1216MF))
by MAVEN:fb0
mgacodec: *mga @ d9aa5400
Matrox Marvel and Rainbow Runner G Capture Driver (V4L)
Matrox KS switchboard
Matrox MJPEG driver
Matrox Marvel and Rainbow Runner G Capture Driver (V4L)
videodev: "mgacap-0" has no release callback. Please fix your driver for
proper sysfs support, see http://lwn.net/Articles/36850/
mgagrab: get_format failed
mgacore: no sub-handler for VIRQ 0x0 to remove!
tuner: TV freq (0.00) out of range (44-958)
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