Hi,

I've posted this to video4linux-list@redhat.com and got one confirmation 
of the problem and it seems like it's a kernel issue so I dared to post 
here. Please CC me on reply.

I've got some problems grabbing with bttv on recent kernels. If anybody
can confirm the problem or even help with this issue I would really
appreciate that.

The comandline is this:
streamer -c /dev/video0 -s NTSC -s 640x480 -f jpeg -o /tmp/foo00000.jpeg
-t 0:120 -r 30

I was using 2.4.20-6 from older rawhide and everything worked perfect -
every frame is grabbed. streamer is from xawtv 3.83.

On kernel-2.4.22-20.1.2024.2.36.nptl (wether UP or SMP) from recent
rawhide streamer misses about every 10th frame

On kernel 2.6.0-0.test5.1.34 it does it for every second frame, the
output is below.

This behavior was confirmed on 2.6.0-test3 with saa7134 driver compared 
to ok with 2.4.20.

I must say that with kernel 2.4.20-6 I was doing up to 80 frames per
second from 4 cards on same server so this is not CPU/chipset/grabber 
card/PCI throuput issue. My dmesg and lspci are attached.

bttv used with kernel 2.4.20 is 0.7.96 (and 0.7.97), bttv for 2.4.22 -
from kernel rpm (0.7.107), bttv for 2.6.0 - from kernel rpm (0.9.11)

Thanks in advance,
Andriy

files / video: JPEG (JFIF) / audio: none
Using stdout to output written files' names
20:23:16:  Lost one frame, total 1 since last restart.
/tmp/foo00000.jpegio: -0.133s   video: -0.015s
20:23:16:  Lost one frame, total 2 since last restart.
/tmp/foo00001.jpegio: -0.199s   video: -0.015s
20:23:16:  Lost one frame, total 3 since last restart.
/tmp/foo00002.jpegio: -0.266s   video: -0.015s
20:23:16:  Lost one frame, total 4 since last restart.
/tmp/foo00003.jpegio: -0.333s   video: -0.015s
20:23:16:  Lost one frame, total 5 since last restart.
/tmp/foo00004.jpegio: -0.399s   video: -0.015s
20:23:17:  Lost one frame, total 6 since last restart.
/tmp/foo00005.jpegio: -0.466s   video: -0.015s
20:23:17:  Lost one frame, total 7 since last restart.
/tmp/foo00006.jpegio: -0.533s   video: -0.015s
20:23:17:  Lost one frame, total 8 since last restart.
/tmp/foo00007.jpegio: -0.600s   video: -0.015s
20:23:17:  Lost one frame, total 9 since last restart.