Unable to view camera through WebRTC stream.

[cray12399]

My setup is as follows:
Distribution: Debian GNU/Linux 12 (bookworm)
Kernel: Linux 6.1.0-rpi7-rpi-v8 aarch64
Model: Raspberry Pi 4 Model B Rev 1.5
Browser: Firefox and Chromium

2 Cameras:
OV5640
OV2710

I am using this setup with a 3D printer and Crowsnest.

The issue that I am having is that I am trying to stream my cameras via WebRTC, but no matter what I do I cannot view the WebRTC streams. It just gives me a blank screen. I was told by someone on the Mainsail Discord to come here after they were unable to find the issue with my setup. For all intents and purposes, it seems like I have everything set up correctly. I know the cameras work because they run fine with ustreamer mjpeg.

Here is my Crowsnest log:
crowsnest (1).log

Here is my crowsnest conf:
crowsnest.conf.txt

Any idea on what can be going on here?

[AlexanderS]

You may want to try to raise gpu_mem to 128MB. This fixed the issue for me.

[cray12399]

You may want to try to raise gpu_mem to 128MB. This fixed the issue for me.

Hi Alexander, thank you for your help. Where am I supposed to put that setting?

[KennyVB]

got same issue, exact
i got 256mb set. rpi 4b 4gb
and tried camera-always-active=1
nothing works

[AlexanderS]

Hi Alexander, thank you for your help. Where am I supposed to put that setting?

This should be added to /boot/config.txt.

And please check if your browser supports WebRTC with H264. You can use for example the following page: https://mozilla.github.io/webrtc-landing/pc_test_no_h264.html

I found the following issues with common browsers:

• In Firefox you have to enable it via media.webrtc.hw.h264.enabled in about:config (See https://unix.stackexchange.com/a/761511 and https://bugzilla.mozilla.org/show_bug.cgi?id=1717679)
• Chromium in Debian Bullseye does not support h264 because libopenh264 is only available since bookworm (See f.e. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031352)

[cray12399]

Hi Alexander, thank you for your help. Where am I supposed to put that setting?

This should be added to /boot/config.txt.

And please check if your browser supports WebRTC with H264. You can use for example the following page: https://mozilla.github.io/webrtc-landing/pc_test_no_h264.html

I found the following issues with common browsers:

* In Firefox you have to enable it via `media.webrtc.hw.h264.enabled` in `about:config` (See https://unix.stackexchange.com/a/761511 and https://bugzilla.mozilla.org/show_bug.cgi?id=1717679)

* Chromium in Debian Bullseye does not support h264 because libopenh264 is only available since bookworm (See f.e. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031352)

I enabled h264 in Firefox and increased my rpi memory to 256mb. I am able to get a picture sometimes showing at this point, but I am getting like 1 frame every 10 seconds or just a blank black screen. Its worse performance than mjpeg with ustreamer. Any suggestions on what I should do next?