Composite (NTSC) VDCE conversion

farrah

I'm trying to capture an NTSC signal, convert it from YUV422 to YUV420, convert it back to YUV422 and display it. However, the video that appears has vertical lines where the signal is missing. I've set the video capture format to V4L2_PIX_FMT_YUV422UVP and the VDCE src_processing_mode to VDCE_INTERLACED and src_mode and res_mode to VDCE_FRAME_MODE. Any suggestions are appreciated.

over 16 years ago

0 liangxiao zhang over 15 years ago

Expert 1430 points

hi, I input :make PLATFORM=DM646.

it desplay:undefine V4L2_PIX_FMT_YUV422UVP.

Can you tell me how to do?

0 Prathap Srinivas over 15 years ago

TI__Expert 5000 points

Hi,

Since you are directly using some NTSC signal, you need not set the capture pixel format explicitly i guess. Just like the standard way of detecting input automatically using G_INPUT and standard using QUERY_STANDARD , you could issue G_FMT and it should be enough i guess.The same settings then can be copied/configured for display as well. Also i think if you are using src_mode and res_mode as FRAME_MODE, try setting the src_processing_mode to PROGRESSIVE.

Also hope you are programing the VDCE operation mode and conversion type in mode params accordingly.

Thanks,

Prathap.

0 farrah over 15 years ago in reply to liangxiao zhang

Prodigy 220 points

#include <linux/videodev2.h>

Processors

Processors forum

Composite (NTSC) VDCE conversion