-----Original Message-----
From: pd-list-admin@iem.at [mailto:pd-list-admin@iem.at] On
Behalf Of jim ruxton
Sent: Monday, July 26, 2004 11:37 A
Cc: pd list
Subject: Re: [PD] pdp and webcams
Thanks Tom,
I'm wondering if anyone can recommend a camera that they are
using with pdp/pidip . I've tried using the Labtec camera
(same driver as Logitech Quickcam express) which works with
Gem (extremely slow) but not pdp.
Tom suggested a camera with the Phillips Chipset. I haven't
seen any Phillips cameras here but it appears that the
Logitech Quickcam 3000 and 4000 use the Phillips chipset. So
anyone using the Logitech Quickcam 3000 or 4000 with pdp??
Has anyone got the Labtech camera to work with pdp.
Thanks,
Jim
On Sun, 2004-07-25 at 16:49, Tom Schouten wrote:
hi jim,
try to send a 'captureformat RGB24' or 'captureformat
RGB32' the the
pdp_v4l object. if that doesn't help, it means your camera
is either
too new (and has only a video4linux2 driver), or it doesn't support
double buffered capturing, which is implicitly assumed in
pdp_v4l, or
has a broken driver.
if it's the double buffering, it means you're stuck. maybe i will
support it later, but that's no priority for me now.
consider buying a camera with a philips chipset. they are a little
more expensive, but it's worth it. it's decent hardware, but more
importantly, there's a good driver that supports its
special features.
this driver is explicitly supported in pdp. the driver is
called 'pwc'
and is in the kernel. the proprietary codec is supported in
the 'pwcx' module.
they have built-in compression which makes it possible to have a
relatively high framerate for a webcam: 27fps at 320x240
compared to
10 for the cheap ones. i don't know if there are any other
driver/camera combinations that can do this.
and no, i'm not payed by philips, but as far as i can see, it's the
only thing that really works well, despite the fact that there's
non-open source part that makes it go that extra mile..
see http://www.smcc.demon.nl/webcam/ for a list of cameras
supported
by the pwc/pwcx driver.
cheers,
tom
On Sun, 25 Jul 2004, jim ruxton wrote:
I'm still trying to figure out why nothing is in the
video window.
Any thoughts where I should start to look.
Jim
I thought I had succeeded but when I try to look for an
image in an
example patch (input_output.pd) I don't see it. Below is
what I get
in the terminal window after creating a window opening
pdp_v4l and
banging it once. I tried pdp_xv and pdp_glx with no luck.
I can see
the video with Gem and xawtv so I think video4linux is ok. Any
thought where I should start to look for problems. I'm using a
logitech usb based webcam.
Jim
Sample width set to 2 bytes
PDP: pure data packet
PDP: version 0.12.3
pdp_xvideo: grabbed port 61 on adaptor 0
pdp_v4l: opening /dev/video0
pdp_v4l: cap: name Logitech USB Camera type 513 channels
1 maxw 352
maxh
292 minw 32 minh 32
pdp_v4l: picture: brightness 32767 depth 24 palette 4
pdp_v4l: channel 0 name Camera type 2 flags 0
pdp_v4l: switched to channel 0
pdp_v4l: set norm to 0
pdp_v4l: buffer size 426240, frames 1, offset 0 0
pdp_v4l: using VIDEO_PALETTE_YUV422
pdp_v4l: frame 0 0, format 7, width 320, height 240
pdp_v4l: Opened video connection (320x240)
pdp_v4l: VIDIOCMCAPTURE: Invalid argument
pdp_v4l: VIDIOCMCAPTURE2: Invalid argument
pdp_v4l: frame 1 1, format 7, width 320, height 240
pdp_v4l: VIDIOCSYNC: Bad file descriptor
pdp_v4l: no device opened
pdp_v4l: attempting auto open
pdp_v4l: opening /dev/video0
pdp_v4l: cap: name Logitech USB Camera type 513 channels
1 maxw 352
maxh
292 minw 32 minh 32
pdp_v4l: picture: brightness 32767 depth 24 palette 4
pdp_v4l: channel 0 name Camera type 2 flags 0
pdp_v4l: switched to channel 0
pdp_v4l: set norm to 0
pdp_v4l: buffer size 426240, frames 1, offset 0 0
pdp_v4l: using VIDEO_PALETTE_YUV422
pdp_v4l: frame 0 0, format 7, width 320, height 240
pdp_v4l: Opened video connection (320x240)
pdp_v4l: VIDIOCMCAPTURE: Invalid argument
pdp_v4l: VIDIOCMCAPTURE2: Invalid argument
pdp_v4l: frame 1 1, format 7, width 320, height 240
pdp_v4l: VIDIOCSYNC: Bad file descriptor
pdp_v4l: auto open failed
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