topic Re: Does mxc-vpu-test support USB camera (UVC)? in i.MX Processors

Does mxc-vpu-test support USB camera (UVC)?

williamho — Wed, 09 Jul 2014 07:18:00 GMT

Dear all,

I am wondering if mxc-vpu-test supports USB web-cam (UVC).

My i.MX6Q platform runs iMX6_jb4.3.1.0.0 BSP.

I tested a Logitech web-cam C615.

Here is the message from Linux dmesg:

[ ] usb 2-1.3.1: new high speed USB device number 7 using fsl-ehci

[ ] uvcvideo: Found UVC 1.00 device HD Webcam C615 (046d:082c)

[ ] input: HD Webcam C615 as /devices/platform/fsl-ehci.1/usb2/2-1/2-1.3/2-1.3.1/2-1.3.1:1.2/input/input5

Then I got a new device node of Logitech web-cam: /dev/video2

But I got error message on encoding/loopback with this device.

Here are error message:

#mxc-vpu-test -E ' -x 2 -w 640 -h 480 -f 2 -t 1 -c 180 -o webcam.mp4'

[INFO] VPU test program built on Jun 30 2014 14:57:52

[INFO] VPU firmware version: 2.3.10_r40778

[INFO] VPU library version: 5.4.14

[INFO] Format: STD_AVC

[INFO] AVC

[INFO] Output file "webcam.mp4" opened.

[INFO] Capture/Encode fps will be 30

VIDIOC_DBG_G_CHIP_IDENT failed.

#mxc-vpu-test -L '-x 2 -w 720 -h 480 -f 2'

[INFO] VPU test program built on Jun 30 2014 14:57:52

[INFO] VPU firmware version: 2.3.10_r40778

[INFO] VPU library version: 5.4.14

[INFO] Format: STD_AVC

[INFO] AVC

[INFO] Capture/Encode fps will be 30

VIDIOC_DBG_G_CHIP_IDENT failed.

Is there anyone tested mxc-vpu-test OK with USB webcam?

Can you tell me which one webcam is well supported?

Re: Does mxc-vpu-test support USB camera (UVC)?

igorpadykov — Thu, 10 Jul 2014 01:56:17 GMT

Hi William

unfortunately

unit tests (mxc-vpu-test) do no support USB cameras.

Best regards

chip

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Re: Does mxc-vpu-test support USB camera (UVC)?

williamho — Thu, 10 Jul 2014 02:42:10 GMT

Thanks your answer....

But is there any unit test tools can support webcam(UVC) video playback?

Any suggestion will be helpful.

Thanks.

Re: Does mxc-vpu-test support USB camera (UVC)?

igorpadykov — Thu, 10 Jul 2014 04:31:22 GMT

Hi William

shortly it can be tested with gstreamer:

gst-launch v4l2src ! mfw_v4lsink

if doesn't work, try:

gst-launch v4l2src ! decodebin2 ! mfw_v4lsink

http://linuxtv.org/wiki/index.php/Webcam_Devices

http://tldp.org/HOWTO/html_single/Webcam-HOWTO/

Best regards

chip