Failed to detect capture video standard

Hi Changsheng,

Thanks for your post.

Your video capture should be compatible to a PAL/NTSC standard camera and VPIF doesn't support ITU-BT.601 format function. Please check Table 36-1 & Table 36-2 for the supported formats on VPIF in Section 36.1.5 of OMAPL138 TRM as below:

http://www.ti.com/lit/ug/spruh77a/spruh77a.pdf

Kindly make sure, the above standard is met with your VPIF loopback demo setup to execute the same. You could refer the omapl138 starterware source code vpif_lcd_loopback.c to execute the vpif loopback demo in your application to capture camera data. Kindly use the below path to check VPIF loopback example after installing the omapl38 starterware package:

~\OMAPL138_StarterWare_1_10_03_03\examples\lcdkOMAPL138\vpif_lcd_loopback\vpif_lcd_loopback.c

Thanks & regards,
Sivaraj K

Hi Sivaraj:

    Thanks very much!

    I will check and try it.

    I want to process raw data in dsp, and share to ARM, Using Startware, is it possible to do it? Can you give me some good idear?

    Thanks.

In function:Capture_detectVideoStd

goto this:

/* Display available video standards */
Dmai_dbg0("Available video standard:\n");
for (index=0;; index++) {

std.frameperiod.numerator = 1;
std.frameperiod.denominator = 0;
std.index = index;

if (ioctl(fd, VIDIOC_ENUMSTD, &std) < 0) {
printf("Capture_detectVideoStd emum fail 0\n");
if (errno == EINVAL || errno == ENOTTY)
{
printf("Capture_detectVideoStd emum fail\n");
break;
}
}
printf ("Current video standard: %d-%s\n", std.name, std.index);
...
}

....

/* Set the video standard */

if (ioctl(fd, VIDIOC_S_STD, &id) < 0) {

...

}

will cause error:

Failed to detect capture video standard

VIDIOC_ENUMSTD VIDIOC_G_STD VIDIOC_S_STD for ioctl is FAIL!  Is these command is different with different CHIP(I using 9900)?

Who can help me to resolv this problem?

Thanks very much!