High Definition 720p USB Webcam DEMO on Linux

I was able to see the video by  "mplayer tv:// -tv device=/dev/video1"
and I also used guvcview successfully too.

gentlemich

Hello,

I think this question has been raised before but I am still trying to make it work: can I use the HD USB demo (Leopard Board) in Linux? I.e. connect the Leopard Board to my computer through USB?

Actually, I have been trying doing that (with Ubuntu 10) and here are the results that I have in dmesg:

[17753.885473] Linux video capture interface: v2.00
[17753.903574] uvcvideo: Found UVC 1.00 device Media gadget (UVC/UAC) (041e:4057)
[17753.905966] input: Media gadget (UVC/UAC) as /devices/pci0000:00/0000:00:1a.7/usb1/1-3/1-3:1.0/input/input15
[17753.906013] usbcore: registered new interface driver uvcvideo
[17753.906016] USB Video Class driver (v0.1.0)
[17753.937383] usbcore: registered new interface driver snd-usb-audio
[17801.449671] uvcvideo: Failed to query (135) UVC control 11 (unit 4) : -75 (exp. 1).
[17801.451064] vmap allocation for size 260018176 failed: use vmalloc=<size> to increase size.
[17801.451067] vmap allocation for size 195014656 failed: use vmalloc=<size> to increase size.
[17801.451070] vmap allocation for size 130011136 failed: use vmalloc=<size> to increase size.
[17801.459294] uvcvideo: Failed to query (135) UVC control 11 (unit 4) : -75 (exp. 1).
[17801.464794] uvcvideo: Failed to query (135) UVC control 11 (unit 4) : -75 (exp. 1).
[17801.465165] vmap allocation for size 260018176 failed: use vmalloc=<size> to increase size.
[17801.465173] vmap allocation for size 195014656 failed: use vmalloc=<size> to increase size.
[17801.465176] vmap allocation for size 130011136 failed: use vmalloc=<size> to increase size.
[17801.473169] uvcvideo: Failed to query (135) UVC control 11 (unit 4) : -75 (exp. 1).
[18056.080018] usb 1-3: USB disconnect, address 4
[20684.164033] usb 1-3: new high speed USB device using ehci_hcd and address 5
[20684.297888] usb 1-3: configuration #1 chosen from 1 choice
[20684.304444] uvcvideo: Found UVC 1.00 device Media gadget (UVC/UAC) (041e:4057)
[20684.321939] input: Media gadget (UVC/UAC) as /devices/pci0000:00/0000:00:1a.7/usb1/1-3/1-3:1.0/input/input16
[20718.467153] uvcvideo: Failed to query (135) UVC control 11 (unit 4) : -75 (exp. 1).
[20718.502388] vmap allocation for size 260018176 failed: use vmalloc=<size> to increase size.
[20718.502393] vmap allocation for size 195014656 failed: use vmalloc=<size> to increase size.
[20718.502396] vmap allocation for size 130011136 failed: use vmalloc=<size> to increase size.
[20718.511040] uvcvideo: Failed to query (135) UVC control 11 (unit 4) : -75 (exp. 1).
[20718.516667] uvcvideo: Failed to query (135) UVC control 11 (unit 4) : -75 (exp. 1).
[20718.517113] vmap allocation for size 260018176 failed: use vmalloc=<size> to increase size.
[20718.517122] vmap allocation for size 195014656 failed: use vmalloc=<size> to increase size.
[20718.517125] vmap allocation for size 130011136 failed: use vmalloc=<size> to increase size.
[20718.526042] uvcvideo: Failed to query (135) UVC control 11 (unit 4) : -75 (exp. 1).

The error messages appear after I am trying to connect to the camera using VLC.

VLC of course is not capable of displaying the image. Any idea why?

Thanks,

Michael

Thanks!

MPlayer is working fine while guvcview gives me a segmentation fault error.

Actually, any idea why I'm getting this error in VLC: "v4l2 demux error: Insufficient buffer memory" ?

Thanks!

Also, one and last question: does the algorithm capture and transfer sound using the microphone?

Tell me please, which kernel sources / DVSDK with UVC peripheral do you use on LeopardBoard?