Driver ov51x-jpeg with more than 3 cams

Question

Hello!!!

Perhaps you could help me to know where is this problem.

I want to use the ov51x-jpeg 1.5.1 driver for ubuntu (2.6.22-14-generic) to use 8 Creative Live IM cams for Motion 3.2.9.

The driver works perfectly with three cams, but if I add a fourth, when system does open it I receive this error:

"Failed to open video device /dev/video3: No space left on device"

Only 3 cams works at same time.

I have tried to connect every cam to different usb bus, but no luck

What do you think? A problem of driver? Perhaps my hardware?

THANK YOU VERY MUCH!!!!!

Miguel

lsusb
Bus 003 Device 002: ID 041e:4052 Creative Technology, Ltd 
Bus 002 Device 015: ID 041e:4052 Creative Technology, Ltd 
Bus 002 Device 014: ID 041e:4052 Creative Technology, Ltd 
Bus 001 Device 031: ID 041e:4052 Creative Technology, Ltd


dmesg
[14423.181396] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: USB OV519 video device found
[14423.535181] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: Sensor is an OV7670 
[14424.178869] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: Device at usb-0000:00:13.0-1 registered to minor 0 
[14424.179203] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: USB OV519 video device found 
[14424.631633] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: Sensor is an OV7670 
[14426.499850] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: Device at usb-0000:00:02.2-3 registered to minor 1 
[14426.500180] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: USB OV519 video device found 
[14426.949667] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: Sensor is an OV7670 
[14428.825927] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: Device at usb-0000:00:02.3-2.1.4.4.2 registered to minor 2 
[14428.826257] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: USB OV519 video device found 
[14429.279323] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: Sensor is an OV7670 
[14431.152554] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: Device at usb-0000:00:02.3-2.1.4.4.3 registered to minor 3 
[14431.152900] usbcore: registered new interface driver ov51x 
[14431.153035] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: 1.5.1 : ov51x USB Camera Driver 
[14453.863753] /usr/src/modules/ov51x-jpeg/ov51x-jpeg-core.c: init isoc: usb_submit_urb(0) ret -28


Motion has problems opening the 4th cam (/dev/video3), I only can open three cams at same time.
[0] Processing thread 0 - config file motion.conf 
[0] Processing config file /etc/motion/thread1.conf 
[0] Processing config file /etc/motion/thread2.conf 
[0] Processing config file /etc/motion/thread3.conf 
[0] Processing config file /etc/motion/thread4.conf 
[0] Motion 3.2.9 Started 
[0] ffmpeg LIBAVCODEC_BUILD 3352064 LIBAVFORMAT_BUILD 3344896 
[0] Thread 1 is from /etc/motion/thread1.conf 
[0] Thread 2 is from /etc/motion/thread2.conf 
[0] Thread 3 is from /etc/motion/thread3.conf 
[0] Thread 4 is from /etc/motion/thread4.conf 
[1] Thread 1 started 
[2] Thread 2 started 
[3] Thread 3 started 
[4] Thread 4 started 
[1] Not a V4L2 device?
[1] Using VIDEO_PALETTE_YUV420P palette
[1] Using V4L1
[1] Started stream webcam server in port 8000 
[2] Not a V4L2 device?
[2] Using VIDEO_PALETTE_YUV420P palette
[2] Using V4L1
[3] Not a V4L2 device?
[2] Started stream webcam server in port 8001 
[3] Using VIDEO_PALETTE_YUV420P palette 
[3] Using V4L1 [4] Failed to open video device /dev/video3: No space left on device 
[4] Capture error calling vid_start 
[4] Thread finishing...

Environment

Motion version:	3.2.9
ffmpeg version:
Libraries:	ffmpeg, mysql, postgresql
Server OS:	Ubuntu 7, kernel 2.6.22-14-generic

-- MiguelRivas - 06 Mar 2008

Answer

Maybe someone else than I can answer you. But have you tried to contact the team behind the driver? This sounds like a driver issue.

-- KennethLavrsen - 07 Mar 2008

Not a driver problem it's a well known issue with USB bandwitdh :

http://www.lavrsen.dk/twiki/bin/view/Motion/FrequentlyAskedQuestions#sync_error_in_proc_xxxx_No_space

-- AngelCarpintero - 16 Jun 2008