[PD] pdp and webcams

[Ian Smith-Heisters]

Quickcam 4000 works like a dream for me. There were a few problems when
kernel 2.6 first came out, but the pwc drivers are at 9.0.1 now, and look
like they'll run nicely. 

> -----Original Message-----
> From: pd-list-admin at iem.at [mailto:pd-list-admin at 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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