video using webcamd on Raspberry Pi 3

[Hans Petter Selasky]

On 09/30/17 03:55, Curtis Villamizar wrote:
> I'm using two camera with webcamd successfully with a amd64 desktop
> running FreeBSD 11.0-STABLE r308356.  The same camera don't work using
> FreeBSD 12.0-CURRENT r322787 on a Raspberry Pi 3 (RPi3) which uses the
> arm64 architecture.
> 
> Both are using the latest libv4l and webcamd from ports.  I'm using
> pwcview for testing though I'd eventually like to get the motion port
> running.
> 
> I compiled webcamd with DEBUG on both.  On the amd64 (which works
> fine) I get:
> 
> # /usr/local/sbin/webcamd -i 0 -d ugen2.3 -U webcamd -G webcamd -H
> Linux video capture interface: v2.00
> uvcvideo: Unable to create debugfs directory
> USB Video Class driver (1.1.1)
> cpia2: V4L-Driver for Vision CPiA2 based cameras v3.0.1
> pvrusb2: V4L in-tree version:Hauppauge WinTV-PVR-USB2 MPEG2 Encoder/Tuner
> pvrusb2: Debug mask is 31 (0x1f)
> USBVision USB Video Device Driver for Linux : 0.9.11
> em28xx: Registered (Em28xx v4l2 Extension) extension
> em28xx: Registered (Em28xx dvb Extension) extension
> Attached to ugen2.3[0]
> uvcvideo: Found UVC 1.00 device USB 2.0 Camera (05a3:9310)
> Waiting for HAL USB device.
> Creating /dev/video0
> 
> The difference between that and the RPi3 (arm64) that doesn't work
> are:
> 
> --- webcamd-amd64-elp.txt       2017-09-29 14:52:37.265268000 -0400
> +++ webcamd-rpi3-elp.txt        2017-09-29 14:54:26.374538000 -0400
> @@ -1,14 +1,10 @@
> -# /usr/local/sbin/webcamd -i 0 -d ugen2.3 -U webcamd -G webcamd -H
> +# /usr/local/sbin/webcamd -i 0 -d ugen0.4 -U webcamd -G webcamd
>   Linux video capture interface: v2.00
> -uvcvideo: Unable to create debugfs directory
>   USB Video Class driver (1.1.1)
>   cpia2: V4L-Driver for Vision CPiA2 based cameras v3.0.1
>   pvrusb2: V4L in-tree version:Hauppauge WinTV-PVR-USB2 MPEG2 Encoder/Tuner
>   pvrusb2: Debug mask is 31 (0x1f)
>   USBVision USB Video Device Driver for Linux : 0.9.11
> -em28xx: Registered (Em28xx v4l2 Extension) extension
> -em28xx: Registered (Em28xx dvb Extension) extension
> -Attached to ugen2.3[0]
> +Attached to ugen0.4[0]
>   uvcvideo: Found UVC 1.00 device USB 2.0 Camera (05a3:9310)
> -Waiting for HAL USB device.
>   Creating /dev/video0
> 
> The two lines that jump out as missing are the lines that begin with
> "em28xx: Registered".  These are in
> work/webcamd-4.8.0.4/media_tree/drivers/media/usb/em28xx/em28xx-video.c
> work/webcamd-4.8.0.4/media_tree/drivers/media/usb/em28xx/em28xx-dvb.c
> but I don't understand how module_init works.
> 
> I've tried to turn on more debugging with webcamd -m options.  Even
> turning on all debug didn't seem to work.  I used
> webcamd -s | grep debug=0 | sed -e 's,=0.*,=255,' -e 's,        , -m ,'
> to tun on all variables with .debug in the name, yet got no additional
> output other than from uaudio0 (the microphone on the camera).
> 
> Does anyone have any insights into this?
> 

Hi,

The RPI3 uses a different USB chipset. Is your device high-speed or 
full-speed. Are you using an external HUB?

What does "usbdump -i usbus0 -f 4 -s 65536 -vvv" say when you start 
pwcview ?

Are there any error messages in dmesg ?

--HPS