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Reg: USB CAM

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vishvapathi
Contributor V

Hi All,

   I am interested to interface USB CAM with my IMX processor. Is it possible to interface Dome or Bullet Camera with USB interface with IMX 6Q processor and Linux OS.

Thanks

DaianeAngolini

winstonrodrigues

chandrasekarkanniappan

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daiane_angolini
NXP Employee
NXP Employee

Hi vishvapathi,

I hope YuriMuhin_ng´s reply is enough. Please let us know :smileywink:

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vishvapathi
Contributor V

Hi,

I have a Logitech C270 web CAM which is UVC compatible. when i connect it to my Mars board i get the following

"usb 2-1.2: new high speed USB device number 3 using fsl-ehci 

3:3:2: cannot set freq 24000 to ep 0x86"

and i didnt find video0 in my /dev.. there is only video16-19.

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Raybiztech
Contributor V

Hi Vishvapathi Karnan,

     Inserting 'videodev.ko' and 'uvcvideodev.ko' modules may solve your problem. This will create an entry for video0 in /dev/. Can you please post the output of 'lsmod' on Mars board.

Thanks & Regards,

RBT

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vishvapathi
Contributor V
gst-launch v4l2src ! mfw_v4lsink                        
Division by zero in kernel.                                               
[<800460b0>] (unwind_backtrace+0x0/0xfc) from [<80221b14>] (Ldiv0+0x8/0x10)

[<80221b14>] (Ldiv0+0x8/0x10) from [<80254138>] (mxcfb_check_var+0x128/0x314)  

[<80254138>] (mxcfb_check_var+0x128/0x314) from [<8023c2a8>] (fb_set_var+0x44/0)

[<8023c2a8>] (fb_set_var+0x44/0x2a4) from [<8035179c>] (release_disp_output+0xf)

[<8035179c>] (release_disp_output+0xfc/0x164) from [<80352f5c>] (mxc_vout_relea)

[<80352f5c>] (mxc_vout_release+0x64/0x70) from [<80344f70>] (v4l2_release+0x54/)

[<80344f70>] (v4l2_release+0x54/0x78) from [<800ed858>] (fput+0xb0/0x1e8) 
[<800ed858>] (fput+0xb0/0x1e8) from [<800ea09c>] (filp_close+0x64/0x84)   
[<800ea09c>] (filp_close+0x64/0x84) from [<800ea160>] (sys_close+0xa4/0xe0)

[<800ea160>] (sys_close+0xa4/0xe0) from [<80040580>] (ret_fast_syscall+0x0/0x30)

Division by zero in kernel.                                               
[<800460b0>] (unwind_backtrace+0x0/0xfc) from [<80221b14>] (Ldiv0+0x8/0x10)
[<80221b14>] (Ldiv0+0x8/0x10) from [<8024dbfc>] (ldb_disp_setup+0xd0/0x160)

[<8024dbfc>] (ldb_disp_setup+0xd0/0x160) from [<80252940>] (mxcfb_set_par+0x34/)

[<80252940>] (mxcfb_set_par+0x34/0x4dc) from [<8023c3cc>] (fb_set_var+0x168/0x2)

[<8023c3cc>] (fb_set_var+0x168/0x2a4) from [<8035179c>] (release_disp_output+0x)

[<8035179c>] (release_disp_output+0xfc/0x164) from [<80352f5c>] (mxc_vout_relea)

[<80352f5c>] (mxc_vout_release+0x64/0x70) from [<80344f70>] (v4l2_release+0x54/)

[<80344f70>] (v4l2_release+0x54/0x78) from [<800ed858>] (fput+0xb0/0x1e8) 
[<800ed858>] (fput+0xb0/0x1e8) from [<800ea09c>] (filp_close+0x64/0x84)   
[<800ea09c>] (filp_close+0x64/0x84) from [<800ea160>] (sys_close+0xa4/0xe0)

[<800ea160>] (sys_close+0xa4/0xe0) from [<80040580>] (ret_fast_syscall+0x0/0x30)

------------[ cut here ]------------                                      
WARNING: at mm/page_alloc.c:2106 __alloc_pages_nodemask+0x510/0x6f0()     
Modules linked in:                                                        

[<800460b0>] (unwind_backtrace+0x0/0xfc) from [<8006b3b0>] (warn_slowpath_commo)

[<8006b3b0>] (warn_slowpath_common+0x4c/0x64) from [<8006b3e4>] (warn_slowpath_)

[<8006b3e4>] (warn_slowpath_null+0x1c/0x24) from [<800bb20c>] (__alloc_pages_no)

[<800bb20c>] (__alloc_pages_nodemask+0x510/0x6f0) from [<80049380>] (__dma_allo)

[<80049380>] (__dma_alloc+0xa0/0x2fc) from [<8004962c>] (dma_alloc_writecombine)

[<8004962c>] (dma_alloc_writecombine+0x24/0x2c) from [<80252d08>] (mxcfb_set_pa)

[<80252d08>] (mxcfb_set_par+0x3fc/0x4dc) from [<8023c3cc>] (fb_set_var+0x168/0x)

[<8023c3cc>] (fb_set_var+0x168/0x2a4) from [<8035179c>] (release_disp_output+0x)

[<8035179c>] (release_disp_output+0xfc/0x164) from [<80352f5c>] (mxc_vout_relea)

[<80352f5c>] (mxc_vout_release+0x64/0x70) from [<80344f70>] (v4l2_release+0x54/)

[<80344f70>] (v4l2_release+0x54/0x78) from [<800ed858>] (fput+0xb0/0x1e8) 
[<800ed858>] (fput+0xb0/0x1e8) from [<800ea09c>] (filp_close+0x64/0x84)   
[<800ea09c>] (filp_close+0x64/0x84) from [<800ea160>] (sys_close+0xa4/0xe0)

[<800ea160>] (sys_close+0xa4/0xe0) from [<80040580>] (ret_fast_syscall+0x0/0x30)

---[ end trace 1b75b31a2719ed1f ]---                                      
mxc_sdc_fb mxc_sdc_fb.0: Unable to allocate framebuffer memory            
detected fb_set_par error, error code: -12                                
mxc_v4l2_output mxc_v4l2_output.0: ERR: fb_set_var.                       
MFW_GST_V4LSINK_PLUGIN 3.0.7 build on Oct 15 2013 15:08:57.               
Setting pipeline to PAUSED ...                                            
ERROR: Pipeline doesn't want to pause.                                    

ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Cannot identify.

Additional debug info:                                                    

v4l2_calls.c(493): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:

system error: No such file or directory                                   
Setting pipeline to NULL ...                                              
Total rendered:0                                                          
Freeing pipeline ...                                                      
[--->FINALIZE v4l_sink                                                    
root@freescale ~$ lsmod                                                   
Module              Size  Used by 
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Raybiztech
Contributor V

Hi Vishvapathi Karnan,

In the command

gst-launch v4l2src ! mfw_v4lsink 

v4l2src will look for the device file /dev/video0. If it is not there it will throw an error. Please insert the modules 'videodev.ko' and 'uvcvideodev.ko' and check for the device file in /dev directory. Now run the above command. If still this error persists post the output of 'lsmod'.

Thanks & Regards,

RBT

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vishvapathi
Contributor V

Hi,

insmod videodev.ko                                      
insmod: can't insert 'videodev.ko': No such file or directory             
root@freescale /$ insmod uvcvideodev.ko                                   
insmod: can't insert 'uvcvideodev.ko': No such file or directory          

root@freescale /$ modprobe uvcvideodev.ko 

Where can i find the files?? i tried to locate it, but didnt succeed

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vishvapathi
Contributor V

i found uvcvideo.ko in rootfs/lib/modules/3.0.35-2508-g54750ff/kernel/drivers/media/video/uvc

where should i look for videodev.ko???

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Raybiztech
Contributor V

Hi,

     You can find videodev.ko in rootfs/lib/modules/3.0.35-2508-g54750ff/kernel/drivers/media/video/. If you cannot find videodev.ko there, try to run ./ltib -m config and enable "Configure the kernel" option in the menu list, exit and save the configuration. Then run ./ltib. Now enable following options in Kernel configuration:

  Device Drivers--> Multimedia Support--> Video for Linux

  Device Drivers--> USB Support --> USB Gadget Support-->USB Webcam Gadget

Build them as modules.

Now

insmod /lib/modules/3.0.35-2508-g54750ff/kernel/drivers/usb/gadget/g_webcam.ko

insmod /lib/modules/3.0.35-2508-g54750ff/kernel/drivers/media/video/videodev.ko

Thanks & Regards,

RBT

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vishvapathi
Contributor V

Hi,

I was able to insert g_webcam.ko. but for videodev.ko i am getting the following

insmod videodev.ko

videodev: exports duplicate symbol __video_register_device (owned by kernel)

insmod: can't insert 'videodev.ko': invalid module format

ls /dev/video*

/dev/video  /dev/video0  /dev/video16  /dev/video17  /dev/video18  /dev/video19

but when i give gst-launch v4l2src ! mfw_v4lsink

MFW_GST_V4LSINK_PLUGIN 3.0.7 build on Oct 15 2013 15:08:57.

WARNING: erroneous pipeline: could not link v4l2src0 to mfw_gst_v4lsink_info_t0

i want to display the video in my display... am i missing anything?

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Raybiztech
Contributor V

Hi,

      Please try this below command

                               gst-launch mfw_v4lsrc ! mfw_v4lsink

Thanks & Regards,

Raybiztech

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vishvapathi
Contributor V

Hi,

response for gst-launch mfw_v4lsrc ! mfw_v4lsink

MFW_GST_V4LSRC_PLUGIN 3.0.7 build on Oct 15 2013 15:09:04.

MFW_GST_V4LSINK_PLUGIN 3.0.7 build on Oct 15 2013 15:08:57.

WARNING: erroneous pipeline: could not link mfwgstv4lsrc0 to mfw_gst_v4lsink_info_t0

for gst-launch --gst-debug-level=9  v4l2src ! mfw_v4lsink

0:02:39.168769301  26560x17050 LOG           GST_CAPS gstutils.c:902:gst_element_get_compatible_pad_template: checking pad template src
0:02:39.168979967  26560x17050 DEBUG         GST_CAPS gstutils.c:907:gst_element_get_compatible_pad_template: compatible direction: found src pad template "s"
0:02:39.169188967  26560x17050 DEBUG         GST_CAPS gstutils.c:910:gst_element_get_compatible_pad_template: intersecting EMPTY
0:02:39.169409301  26560x17050 DEBUG         GST_CAPS gstutils.c:912:gst_element_get_compatible_pad_template: ..and video/x-raw-rgb, bpp=(int)8, depth=(int)8]
0:02:39.506240967  26560x17050 DEBUG         GST_CAPS gstutils.c:918:gst_element_get_compatible_pad_template: caps are not compatible
0:02:39.506490967  26560x17050 DEBUG GST_ELEMENT_PADS gstutils.c:932:gst_element_get_compatible_pad_template: No compatible pad template found
0:02:39.506736967  26560x17050 TRACE   GST_REFCOUNTING gstobject.c:336:gst_object_unref:<sink> 0xbb0e8 unref 1->0
0:02:39.506963967  26560x17050 TRACE   GST_REFCOUNTING gstcaps.c:432:gst_caps_unref: 0x9ab60 1->0
0:02:39.507184301  26560x17050 LOG           GST_CAPS gstcaps.c:345:_gst_caps_free: freeing caps 0x9ab60
0:02:39.507403634  26560x17050 TRACE   GST_REFCOUNTING gstobject.c:457:gst_object_dispose:<sink> dispose
0:02:39.507640634  26560x17050 TRACE   GST_REFCOUNTING gstobject.c:489:gst_object_finalize:<sink> finalize
0:02:39.507883967  26560x17050 INFO   GST_ELEMENT_PADS gstutils.c:1213:gst_element_get_compatible_pad:<v4l2src0> Could not find a compatible pad to link to mfk
0:02:39.508129967  26560x17050 TRACE   GST_REFCOUNTING gstobject.c:336:gst_object_unref:<mfw_gst_v4lsink_info_t0:sink> 0xbf0d0 unref 2->1
0:02:39.839372301  26560x17050 DEBUG GST_ELEMENT_PADS gstutils.c:1881:gst_element_link_pads_full: we might have request pads on both sides, checking...
0:02:39.839626967  26560x17050 DEBUG GST_ELEMENT_PADS gstutils.c:1924:gst_element_link_pads_full: no link possible from v4l2src0 to mfw_gst_v4lsink_info_t0
0:02:39.839862634  26560x17050 INFO           default gstutils.c:2034:gst_element_link_pads_filtered: Could not link pads: v4l2src0:(null) - mfw_gst_v4lsink_)
0:02:39.840111967  26560x17050 ERROR     GST_PIPELINE ./grammar.y:614:gst_parse_perform_link: could not link v4l2src0 to mfw_gst_v4lsink_info_t0

WARNING: erroneous pipeline: could not link v4l2src0 to mfw_gst_v4lsink_info_t0

Attached partial log in txt document.

Thanks Vishva

shanmugamsundar

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vishvapathi
Contributor V

Hi,

for gst-launch v4l2src device=/dev/video1

Setting pipeline to PAUSED ...

Pipeline is live and does not need PREROLL ...

Setting pipeline to PLAYING ...

New clock: GstSystemClock

ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.

Additional debug info:

gstbasesrc.c(2582): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:

streaming task paused, reason not-linked (-1)

Execution ended after 966582666 ns.

Setting pipeline to PAUSED ...

Setting pipeline to READY ...

Setting pipeline to NULL ...

Freeing pipeline ...

LED in my Logitech C270 blinks for this command.

Any Idea wats the prob?

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Raybiztech
Contributor V

HI,

          Please check video device file in /dev/. you may have video0,or 1 ... device file created for the camera and make the particular device file of your camera and give as input to the gst-launch command

                           gst-launch v4l2src device=/dev/video0 ! mfw_v4lsink

Thanks & Regards,

Raybiztech

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vishvapathi
Contributor V

Hi,

I did try that...

ls /dev/video*

/dev/video   /dev/video1   /dev/video17  /dev/video19

/dev/video0  /dev/video16  /dev/video18

for gst-launch v4l2src device=/dev/video1

Setting pipeline to PAUSED ...

Pipeline is live and does not need PREROLL ...

Setting pipeline to PLAYING ...

New clock: GstSystemClock

ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.

Additional debug info:

gstbasesrc.c(2582): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:

streaming task paused, reason not-linked (-1)

Execution ended after 966582666 ns.

Setting pipeline to PAUSED ...

Setting pipeline to READY ...

Setting pipeline to NULL ...

Freeing pipeline ...

LED in my Logitech C270 blinks for this command. But no response after that..

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Raybiztech
Contributor V

HI,

              Insert an other module uvcvideo.ko and then try with the gst-launch command.

Thanks & Regards,

Raybiztech.

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vishvapathi
Contributor V

Hi,

Response for the insertion

$insmod g_webcam.ko                                                                                     
g_webcam gadget: uvc_function_bind                                                                                       
g_webcam gadget: Webcam Video Gadget                                                                                     
g_webcam gadget: g_webcam ready                                                                                          
Suspend udc for OTG auto detect                                                                                          
fsl-usb2-udc: bind to driver g_webcam                                                                                    
root@freescale /$ insmod uvcvideo.ko                                                                                     
uvcvideo: Found UVC 1.00 device <unnamed> (046d:0825)                                                                    
input: UVC Camera (046d:0825) as /devices/platform/fsl-ehci.1/usb2/2-1/2-1.2/2-1.2:1.0/input/input2                      
usbcore: registered new interface driver uvcvideo                                                                        
USB Video Class driver (v1.1.0)                                                                                          
root@freescale /$ gst-launch v4l2src device=/dev/video1                                                                  
Setting pipeline to PAUSED ...                                                                                           
Pipeline is live and does not need PREROLL ...                                                                           
Setting pipeline to PLAYING ...                                                                                          
New clock: GstSystemClock                                                                                                
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.                                
Additional debug info:                                                                                                   
gstbasesrc.c(2582): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:                                    
streaming task paused, reason not-linked (-1)                                                                            
Execution ended after 964873333 ns.                                                                                      
Setting pipeline to PAUSED ...                                                                                           
Setting pipeline to READY ...                                                                                            
Setting pipeline to NULL ...                                                                                             
Freeing pipeline ...                

LED in my Logitech C270 blinks for this command. But no response after that..

Thanks

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vishvapathi
Contributor V

Hi,

I am able to record videofrom webcam. but not to display in my LCD...

$gst-launch v4l2src device=/dev/video1 ! autovideosink//CAM LED is ON, but no display on my screen

$gst-launch v4l2src device="/dev/video1" ! video/x-raw-yuv,width=640,height=480 ! ffmpegcolorspace ! avimux ! filesink location=/root/Vishva/video.avi

//Records Video in avi format. but size is large.

kindly help to display livestream on LCD...

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vishvapathi
Contributor V

Hi,

After exporting $export VSALPHA=1

I am able to get live stream to my Display... :-)

Thanks to All

shanmugamsundar

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Raybiztech
Contributor V

Hi,

            The error you are getting is like "streaming task paused, reason not-linked(-1)" because you gave the input element "v4l2src" but the output element "mfw_v4lsink" is missing. Try using the entire command (you need to create pipeline as mentioned below)

                         gst-launch v4l2src device=/dev/<device file> ! mfw_v4lsink

Thanks & Regards,

Raybiztech.

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chennurupushpat
Contributor I

Hi,

       This is pushpa teja iam the replacement of vishvapathi karnan .Iam handling the project remainig parts please i need ur support  regarding of to store live streaming in compressed format .i have tried by using VLC but it was not supporting for Mars board please can u give me any idia about it

Thanks ,

pushpa teja

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