How to grab a single frame in VPFE (video_loopback) on DM6437?

Yuanwei.Lao

Hi,

I need to test some image processing algorithm with DM6437. It seems to me that using the example video_loopback (VPFE, VPBE) is the simplest way to build up a testing platform. I will use a s-video from a DVD as an input and s-video to a TV as the output.

My question is how to grab a single frame between VPFE and VPBE to perform the algorithm. Just use 'video_buffer' as the address to acquire the single frame of the video? Shall I put my algorithm in While(1) loop or between ' vpfe_init( ntsc_pal_mode );' and 'vpbe_init( LOOPBACK, ntsc_pal_mode, output_mode );'?

Thank you very much!

over 15 years ago

0 Bernie Thompson TI over 15 years ago

TI__Mastermind 41665 points

I believe the Accessing Pixels in a Frame wiki article will help to answer your question, it provides an example that performs a video loopback based on the video_preview example and changes some values in the frame before passing it to the display.

In general you will have a while(1) loop with calls to FVID_exchange in it, one to get a frame from the capture side and one to display a frame to the output, you would typically put your processing code in there assuming you need to process every frame.

0 Yuanwei.Lao over 15 years ago in reply to Bernie Thompson TI

Prodigy 250 points

Thanks a lot. Bernie. I just realize there have similar questions before. Thank you.

0 Shiwei Li over 13 years ago in reply to Bernie Thompson TI

Prodigy 20 points

Hi,

What can I do to handle this if I do not use the BIOS/DVSDK?

regards,

Shiwei Li

Processors

Processors forum

How to grab a single frame in VPFE (video_loopback) on DM6437?