[libcamera-devel] Getting 30fps from libcamerasrc

[Laurent Pinchart]

Hi Pavel,

On Sat, Jul 30, 2022 at 01:31:16PM +0200, Pavel Machek via libcamera-devel wrote:
> Hi!
> 
> So... with some hacks, I can get 30fps 2MPix recording on
> pinephone... from the "cam" utility. Which will have trouble with
> audio.

Indeed :-) "cam" is meant to be a test tool, not an end-user
application, so you've certainly reached the limits of its scope if you
want audio.

> When I try to use libcamerasrc (and gstreamer), I get down to 10fps or
> so, but it looks more like artifical limit then performance one. Is it
> so? How can I request 30fps?

What gstreamer pipeline do you use ? I don't have a pinephone, but
running

GST_PLUGIN_PATH=$(pwd)/src/gstreamer gst-launch-1.0 \
	libcamerasrc camera-name='\\_SB_.PCI0.RP05.PXSX.TBL3.TBTU.RHUB.UB32-2:1.0-046d:0893' ! \
	'video/x-raw,width=1280,height=720' ! \
	fpsdisplaysink sync=0 text-overlay=false video-sink=glimagesink -v

on my laptop with a UVC webcam gives me 30fps. Can you try something
similar, possibly using the a fakesink first, on the pinephone ?

-- 
Regards,

Laurent Pinchart