gpu_mem setting in /boot/config.txt

[rezrov]

I had a chance to run the script (RTSP, compiling FFMPEG) on a freshly installed and updated Pi 3B+ and it ran like a champ, no errors. It took about an hour.

The service failed to start however, because I did not have enough memory assigned to the gpu for the camera I'm using. Bumping up the memory in /boot/config.txt fixed the issue.

[all]
gpu_mem=256

This might be outside the scope of your script, but the error messages I encountered gave no indication that gpu memory was the problem so it took some digging to figure it out. Perhaps a note about this in the README might save some people some time.

Thanks for your work on this project.

[cdgriffith]

Good point, I addressed that in the article but never linked / talked about here.

Adding error message here in case someone googling / searching stumbles across this.

If at any point you receive the error ioctl(VIDIOC_STREAMON) failure : 1, Operation not permitted, go into raspi-config and up the video memory (memory split) to 256 and reboot.

[cdgriffith]

Adding to section in readme, thanks! https://github.com/cdgriffith/pi_streaming_setup#error-ioctlvidioc_streamon-failure--1-operation-not-permitted