Reg: USB CAM

vishvapathi · ‎12-03-2013

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

daiane_angolini · ‎12-11-2013

Hi vishvapathi,

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

vishvapathi · ‎12-13-2013

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.

Raybiztech · ‎12-13-2013

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

vishvapathi · ‎12-13-2013

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

Raybiztech · ‎12-13-2013

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

vishvapathi · ‎12-13-2013

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

vishvapathi · ‎12-13-2013

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???

Raybiztech · ‎12-13-2013

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

vishvapathi · ‎12-16-2013

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?

Raybiztech · ‎12-17-2013

Hi,

Please try this below command

gst-launch mfw_v4lsrc ! mfw_v4lsink

Thanks & Regards,

Raybiztech

vishvapathi · ‎12-17-2013

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 2656	0x17050 LOG	GST_CAPS gstutils.c:902:gst_element_get_compatible_pad_template: checking pad template src
0:02:39.168979967 2656	0x17050 DEBUG	GST_CAPS gstutils.c:907:gst_element_get_compatible_pad_template: compatible direction: found src pad template "s"
0:02:39.169188967 2656	0x17050 DEBUG	GST_CAPS gstutils.c:910:gst_element_get_compatible_pad_template: intersecting EMPTY
0:02:39.169409301 2656	0x17050 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 2656	0x17050 DEBUG	GST_CAPS gstutils.c:918:gst_element_get_compatible_pad_template: caps are not compatible
0:02:39.506490967 2656	0x17050 DEBUG	GST_ELEMENT_PADS gstutils.c:932:gst_element_get_compatible_pad_template: No compatible pad template found
0:02:39.506736967 2656	0x17050 TRACE	GST_REFCOUNTING gstobject.c:336:gst_object_unref:<sink> 0xbb0e8 unref 1->0
0:02:39.506963967 2656	0x17050 TRACE	GST_REFCOUNTING gstcaps.c:432:gst_caps_unref: 0x9ab60 1->0
0:02:39.507184301 2656	0x17050 LOG	GST_CAPS gstcaps.c:345:_gst_caps_free: freeing caps 0x9ab60
0:02:39.507403634 2656	0x17050 TRACE	GST_REFCOUNTING gstobject.c:457:gst_object_dispose:<sink> dispose
0:02:39.507640634 2656	0x17050 TRACE	GST_REFCOUNTING gstobject.c:489:gst_object_finalize:<sink> finalize
0:02:39.507883967 2656	0x17050 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 2656	0x17050 TRACE	GST_REFCOUNTING gstobject.c:336:gst_object_unref:<mfw_gst_v4lsink_info_t0:sink> 0xbf0d0 unref 2->1
0:02:39.839372301 2656	0x17050 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 2656	0x17050 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 2656	0x17050 INFO	default gstutils.c:2034:gst_element_link_pads_filtered: Could not link pads: v4l2src0:(null) - mfw_gst_v4lsink_)
0:02:39.840111967 2656	0x17050 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

vishvapathi · ‎12-17-2013

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?

Raybiztech · ‎12-17-2013

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

vishvapathi · ‎12-17-2013

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..

Raybiztech · ‎12-17-2013

HI,

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

Thanks & Regards,

Raybiztech.

vishvapathi · ‎12-17-2013

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

vishvapathi · ‎12-18-2013

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...

vishvapathi · ‎12-18-2013

Hi,

After exporting $export VSALPHA=1

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

Thanks to All

shanmugamsundar

Raybiztech · ‎12-17-2013

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.

chennurupushpat · ‎06-29-2014

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

Reg: USB CAM

Reg: USB CAM

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