On Sun, 2 Jun 2002, Mike Porter wrote:
> > Kevin Atkinson wrote:
>
> > > For the life in me I can't get streamer to record anything without getting
> > > tons of "queueing frame twice". As a result the resting video is very
> > > jerky. I also get "v4l: waiting for a free buffer". Unless I increase
> > > gbuffers. With buffers at the default:
> > >
> > > $ streamer -t 0:05 -s 352x240 -r 29.97 -o video.yuv -O audio.wav
> > > raw / video: 12 bit YUV 4:2:0 (planar) / audio: 8bit mono
> > > rate: queueing frame twice (2)
> > > rate: queueing frame twice (1) video: -0.000s
>
> I was seeing this with a stock bttv in 2.4.19-pre8 also. I changed
> to 0.8.4 and the problem essentially disappeared. Using 16 buffers
> or so, plus using the parameters as specifed in script "update" in
> the bttv distro. If you have SMP, then I have a patch you must
> apply. I sent it to the author as well. I now get about 15 frame
> drops near the beginning, and then never again.
>
> The frame drops have nothing to do with disk. I tried recording to
> /dev/null and still got frame drops with the older bttv. I would
> suggest writing to /dev/null too and see what happens.
For me I think it does. Using bttv 0.8.40 with v4l2 I only get one or two
queuing frame twice when the output files is linked to /dev/null.
Now I'm sure something there is somesort of incompatibility or bug in the
kernel with by IDE system. Maybe I should take this to the kernel mailing
list, alhough I hate to bother them if it is not really a kernel problem.
> > > Using tmpfs doesn't help. Nor does using mjpeg compression when the frame
> > > rate is 29.97. However mjpeg is ok when using the default frame rate at
> > > 10.
>
> I used mjpeg at 29.97. VCD resolution (352 x 240).
Good for you, now if I can only do the same ;)
> > > Well when using SCSI emulation I have problems when reading/writing cds.
> > > Using dd or cat to dump a cds iso image works find but when I use readcd
> > > i can barley move the mouse let alone do something else while readcd is
> > > working. I have a similar problem when burnings cds at full speed (24x)
> > > but my system is responsive enough to at least browse the web.
>
> I popped for the Plextor SCSI burner...never a problem.
>
> Presumably you don't have the burner and the disk on the same IDE
> cable?
No. One the second ide I have a 50X CD-ROM as the primary and the CD-ROM
burning as the secondary.
> Did you say you have a 440BX? If so, check /proc/ide/piix and see
> if UDMA is enabled:
[kevina@kevin-pc kevina]$ cat /proc/ide/piix
Intel PIIX4 Ultra 33 Chipset.
--------------- Primary Channel ---------------- Secondary Channel
------------- enabled enabled
--------------- drive0 --------- drive1 -------- drive0 ---------- drive1
------DMA enabled: yes yes yes
yes
UDMA enabled: yes no yes yes
UDMA enabled: 2 X 2 2
UDMA
DMA
PIO
On Primary: Hard Drive, nothing
Secondary: CD-Rom, CD-Rom Burner
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http://kevin.atkinson.dhs.org
