[PD] pdp and webcams

Yves Degoyon ydegoyon at free.fr
Mon Jul 26 20:10:52 CEST 2004


i use an aiptek mobile v-cam ( modulo ov511 ),
but i don't use much pdp/pidip myself,
some friends do ( laughters )

suerte,
sevy

Ian Smith-Heisters wrote:

>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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>>>
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