webcam framerate bottleneck on linux? - Printable Version

+- PINE64 (
+-- Forum: Pinebook Pro (
+--- Forum: Linux on Pinebook Pro (
+--- Thread: webcam framerate bottleneck on linux? (/showthread.php?tid=11728)

webcam framerate bottleneck on linux? - gleachkr - 10-04-2020

Hi Folks,

I'm trying to understand the performance of the PBP webcam on linux. Here's a related thread from the hardware forum:

The tldr is that `v4l2-ctl --list-formats-ext` makes it look like the camera ought to support 20fps at 1600x1200. And indeed, you can even set the camera to that, using v4l2-ctl or guvcview. But the results are clearly not 20fps. The picture quality (motion is blurred) suggests that the trouble is a long exposure time on the camera, even in bright light conditions. The bottleneck isn't the processing power of the PBP, since you can get perfectly good framerates at comparable resolutions with an external webcam.

Is there a v4l2 guru in the house who might have any idea of what's going on here?