./sample_camera_multiple_gmsl --selector-mask=1111 cannot find the captured png

hi, I am using the samples in driveworks.6 on PX2 Tegra A and meeting a problem.
when I use the command “./sample_camera_multiple_gmsl --selector-mask=1111” to show the cameras and press s to capture pictures, the terminal show “SCREENSHOT TAKEN to screenshot_0_0_0000.png”
but I can not find the picture, where are they?

Besides, I want to know how can I use the driveworks to write my programs?

Dear liangrong,
you can find the captured images in current directory. It seems you don’t have write permission to the current folder. You may launch the application from home directory or run the command with sudo.

Driveworks provides couple of sample applications. Depending on your use case, you may need few modifications or clubbing of sample applications . What is your use case?

Please check file:///usr/local/driveworks-0.6/doc/nvdwx_html/index.html to know details about Driveworks