[PD] pdp and webcams

[slimboyfatboyslim]

I'm using iSweet FW webcam, it works really well with 320x240, nearly 
with no delay, I've brought that from a fake japanese company in the 
US.

BTW, I'm using mac osx 10.3.4

於 26 Jul 04 11:36 PM 時，jim ruxton 提到：

> 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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slimboyfatboyslim
http://www.slimboyfatboyslim.org

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