TDA4VM: OpenVX documentation for camera application from vision apps

David Dominguez Moises

Part Number: TDA4VM

Hi,

I'm currently using the single cam app from the basic demos from vision apps, which seems to use the open VX stuff. Is there any documentation on how to write/modify this type of applications?

I'd like to make modifications to adapt features, like storing frames to NVM M.2.

Additional to this, when my camera is running (showing in the display as expected) I get the following messages on the console and not sure how to fix this:

[MCU2_0] 14175.543287 s: VX_ZONE_ERROR:[AWB_TI_process:1495] TI_AWB_do Returned error 1
[MCU2_0] 14175.543364 s: VX_ZONE_ERROR:[tivxAewbProcess:812] AWB_TI_process returned error 0xffffffff
[MCU2_0] 14175.571032 s: VX_ZONE_ERROR:[AWB_TI_process:1495] TI_AWB_do Returned error 1
[MCU2_0] 14175.571094 s: VX_ZONE_ERROR:[tivxAewbProcess:812] AWB_TI_process returned error 0xffffffff

These messages repeat all the time while I'm streaming from my camera. Any idea on what this means and how to fix?

Thanks,

David

over 5 years ago

0 Shyam Jagannathan over 4 years ago

TI__Genius 10365 points

Hi David,

You can try writing the captured frames using app_multi_cam,

Do modify the below parameters in /opt/vision_apps/app_multi_cam.cfg on the SD card before running the run_app_multi_cam.sh application.

# Number of frames to write per 's' command,

num_frames_to_write 1

# Number of frames to skip per 's' command, Eg. 0-no frame skip, 1-skip 1 frame, 2-skip 2 frames etc.

num_frames_to_skip 0

# path to write the processed frames

output_file_path /opt/vision_apps/app_cam_out

0 Shyam Jagannathan over 4 years ago in reply to Shyam Jagannathan

TI__Genius 10365 points

You can select which output to write to file by enabling these flags,

# enable writing final output 0-disable, 1-enable

en_out_img_write 0

# enable writing csix output 0-disable, 1-enable

en_out_capture_write 0

# enable writing viss output 0-disable, 1-enable

en_out_viss_write 0

# enable writing ldc output 0-disable, 1-enable

en_out_ldc_write 0

After selecting the choice of sensors and number of cameras t 1 - 8 cameras as required from the interactive menu the application will bring up capture and display and show another interactive menu. Now do a keypress 's' to save all the required files as mentioned in the app_multi_cam.cfg.

For the AEWB error, I have copied an expert who can help you on the same.

Regards,
Shyam

0 Mayank Mangla over 4 years ago in reply to Shyam Jagannathan

TI__Mastermind 24525 points

Hello David,

For better tracking, can you please create a separate thread for AEWB?

Regards,

Mayank

0 David Dominguez Moises over 4 years ago in reply to Mayank Mangla

Intellectual 570 points

HI Mayank, I have created a related question here for the AWB error. thanks

0 David Dominguez Moises over 4 years ago in reply to Shyam Jagannathan

Intellectual 570 points

Hi Shyam, thanks for the information. Is there any specific docs on how to write/modify new apps based on these examples with OpenVX?
Besides that your comments are a good start, but I'm looking into adapting directly on the C code level.

+1 Shyam Jagannathan over 4 years ago in reply to David Dominguez Moises

TI__Genius 10365 points

Hi David,

If you are new to OpenVx, I recommend you start from here,

https://training.ti.com/module-1-overview-openvx-framework-heterogeneous-compute?context=1140070-1147252-1147253

Our SDK is layered where OpenVx is provided as a library and vision_apps is where we use it to create multiple applications. Best available resource right now is the documentation and user-guide,

TIOVX - https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/latest/exports/docs/tiovx/docs/user_guide/index.html

VISION_APPS - https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/latest/exports/docs/vision_apps/docs/user_guide/index.html

Regards,
Shyam

Processors

Processors forum

TDA4VM: OpenVX documentation for camera application from vision apps