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TDA4VM: Problem about ScreenShot ('s' command) of single_cam_app.

OBUCHI YOHEI
Prodigy 210 points
Part Number: TDA4VM

Hi , experts.

I use Linux & RTOS mode on TDA4VM at following environment.

SDK:

ti-processor-sdk-rtos-j721e-evm-08_00_00_12
ti-processor-sdk-linux-j7-evm-08_00_00_08

I am using single_cam_app on vision_apps (Camera:AR0820)

I found one problem.

When I took screenshot in sequence by 's' command , raw images(*.raw) were updated everytime(OK) but yuv images(*.yuv) were not updated sometimes(NOK) . 

Then display was updated correctly.


Q1 . What is the reason is the phenomenon? Is there any way to correct this?

  • 0
    TI__Guru**** 478905 points

    Hi Obuchi,

    Do you see tearing artifacts, ie half from previous image and other half from current one? You might see this when scene is moving, but not when it is static. 

    Please use this feature only for static image capture.

    Regards,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Prodigy 210 points

    Hello Brijesh

    Thank you for quick reply.
    This is not about one image.
    I found the phenomenon at following case.

    1. run app_single_cam.
    2. push 's' command at 5 sec intervals.
    3. check saved images. (raw and yuv)

    raw images: each raw images are different
    yuv images: each yuv images are same.

    What do you think?

  • 0 in reply to OBUCHI YOHEI
    TI__Guru**** 478905 points

    Hello ,

    This should not happen, because YUV buffers are also rotate, just like raw image. So if raw images are different, then yuv images should also be different, because they will also pass through VISS. 

    Few questions,

    - Do you see anything on the display? I mean to say, is the usecase running fine? If the usecase is running, then yuv images should also change.

    Regards,

    Brijesh