Re: webcam support -- first success!!

From: <poeml_at_cmdline.net>
Date: Thu, 19 May 2005 20:46:21 +0200
On Thu, May 19, 2005 at 02:18:43PM +0200, Peter Poeml wrote:
> Wild flickering on the display, but only for a short time. (It does look
> more like initialising the screen than an actual video stream.) In fact,
> the spcaview terminates quite soon: 

When I capture to a file rather, I can avoid the problem with the
framebuffer. ...and it works!

http://bro.poeml.de/~poeml/cl20.avi (1.3MB)
(me waving)

(The actual historical first stream is somewhat larger, 5MB ;)
http://bro.poeml.de/~poeml/cl20-very_first_stream.avi


It seems to work when the camera has powered on just before. In other
words, if I try a second time without resetting the camera it doesn't
work, and only a very small file is captured (2056 bytes), and spcaview
logs something like "Used 26474ms for 1 images => 26474ms/image 0fps."


The log of a successful attempt:


 # ./spcaview -f jpg -s 320x240 -j -o /tmp/bla.avi
 Spcaview version:1.0.4 date: 01:05:2005 (C) mxhaard_at_magic.fr
 size width: 320 height: 240
Initializing SDL.
SDL initialized.
bpp 3 format 21
Using video device /dev/video0.
Initializing v4l.
May 19 20:24:49 g3bw kernel: drivers/usb/spca5xx.c: [spca500_initialise:5921] Spca500 Sensor Address  0x00
**************** PROBING CAMERA *********************
Camera found: Agfa ephoto CL20

Bridge found: SPCA500

StreamId: JPEG Camera
Available Resolutions width 640  heigth 480 native
Available Resolutions width 352  heigth 288 native
Available Resolutions width 320  heigth 240 native *
Available Resolutions width 176  heigth 144 native
*****************************************************
 grabbing method default MMAP asked
VIDIOCGMBUF size 4915232  frames 4  offets[0]=0 offsets[1]=1228808
VIDIOCGPICT
brightnes=0 hue=0 color=0 contrast=0 whiteness=0
depth=8 palette=21
VIDIOCSPICT
brightness=0 hue=0 color=0 contrast=0 whiteness=0
depth=24 palette=21

May 19 20:24:58 g3bw last message repeated 2 times
May 19 20:25:22 g3bw sshd[1159]: Accepted publickey for root from ::ffff:192.168.0.180 port 34540 ssh2
cvsync err
: Interrupted system call

Used 64235ms for 1153 images => 55ms/image 17fps.
Quiting SDL.
Decoded frames:1153 Average decode time: 0.000000
unmapping
closing
closed
close avi
Destroy Picture thread ...
Quiting....



Peter
-- 
the big machine that goes "ping" ate the little can of spam
Received on Thu May 19 2005 - 20:46:23 CEST

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