i.MX ProcessorsのトピックCapture 1280x720 using OV5642 module

Capture 1280x720 using OV5642 module

dhavalvadhar — Fri, 28 Aug 2015 13:33:20 GMT

Hi,

I am using i.MX6 based hardware with which OV5642 module is connected. I am trying to write a application which captures various resolutions of raw video.

Using this application I am able to capture 640x480 and 720x480 raw video. But when I try to capture 1280x720 video it gives me following errors:

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imx-ipuv3 2400000.ipu: IC output size(1080) cannot exceed 1024

imx-ipuv3 2400000.ipu: failed to calculate prpenc height scaling coefficients

imx-ipuv3 2400000.ipu: IPU Warning - IPU_INT_STAT_5 = 0x00100000

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Still it continues to capture the frames and dumps it to the file. But when I am playing back that file there was nothing.

Can someone please help me on this?

It would be great if someone can share some sample application for the same.

Thanks,

Dhaval

Re: Capture 1280x720 using OV5642 module

igorpadykov — Sat, 29 Aug 2015 01:15:39 GMT

HI Dhaval

for 720P one needs to set capture-mode=4 (one can check with

gst-inspect mfw_v4lsrc), examples can be found on

ov5642 1080p 30 fps and sabre light

Linux Software User Manual (i.MX6) - BlueWiki

error: "IC output size(1080) cannot exceed 1024" means that IPU IC submodule

(used for rotation or resizing) output size is restricted to 1024 max.

So one needs to split image on smaller areas and process (for example rotate)

them, after that combine to whole image.

Best regards

igor

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Re: Capture 1280x720 using OV5642 module

dhavalvadhar — Mon, 31 Aug 2015 07:04:12 GMT

Hi Igor,

Thanks for your quick reply!

As you suggested, I configured the Capture Mode = 4 following way :

// Set capture stream parameters

struct v4l2_streamparm streamParams;

streamParams.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

streamParams.parm.capture.capturemode = 4;

streamParams.parm.capture.timeperframe.denominator = 30;

streamParams.parm.capture.timeperframe.numerator = 1;

if (0 > ioctl(deviceFd, VIDIOC_S_PARM, &streamParams)) {

printf("ERROR: Failed to set video stream parameters\n");

return -1;

}

But still the captured raw data is not correct. I have attached the snapshot of the same. Also, I didn't find any sample code of video capture on the links you have mentioned.

How the IPU IC Submodule activated, automatically? I haven't done that.

Thanks,

Dhaval

Re: Capture 1280x720 using OV5642 module

igorpadykov — Mon, 31 Aug 2015 12:09:47 GMT

HI Dhaval

one can look at below links where similar problem was discussed

https://community.freescale.com/message/361253#361253

https://community.freescale.com/message/373795#373795

Best regards

igor

Re: Capture 1280x720 using OV5642 module

chrisroed — Wed, 23 Dec 2015 16:20:52 GMT

Hi Dhaval,

Did you ever solve this issue?

Re: Capture 1280x720 using OV5642 module

aravinthkumarja — Thu, 14 Jun 2018 10:41:05 GMT

Have you solved this issue.?

Regards,

Aravinth