Failed to allocate required memory

[James Linder]

> On 22 Nov 2022, at 1:10 pm, James Linder via gstreamer-devel <gstreamer-devel at lists.freedesktop.org> wrote:
> 
> I have a NUC, video mem is maxed out at 256M. It is using 1.6G of 8G ram.
> None of the google answers is on the right track for me.
> 
> I have an app that previews or records 1..4 streams.
> Any one channel works perfectly, but any second channel unleases the error.
> 
> My code is compiled in, but is essentially this (for record, ithout the 2nd tee branch for preview.
> I prefer control oh each line, but if need I’d gine it up and have a single line.
> 
> Can anybody suggest *where to look*
> Thanks
> James
> 
> ———————— test pipeline (that soes work if no other pipeline is running)
> 
> gst-launch-1.0 v4l2src device=/dev/video8 ! image/jpeg,framerate=30/1 \
> 	! jpegdec ! \
>        videoconvert ! \
> queue max-size-buffers=0 max-size-bytes=0 max-size-time=1000000000 ! \
> gdkpixbufoverlay location=rennisons.png alpha=0.5 offset-x=1800 offset-y=900 ! \
> clockoverlay halignment=left valignment=top draw-outline=true font-desc="Sans, 12" time-format="%d %b %Y %H:%M:%S" ! \
> textoverlay text="This is Line 1"               deltay=50  halignment=left valignment=top font-desc="Sans, 10"            draw-outline=true ! \
> textoverlay text="Line 2"               deltay=100 halignment=left valignment=top font-desc="Sans, 10"                    draw-outline=true ! \
> textoverlay text="Look it works" deltax=50 deltay=150 halignment=left valignment=top font-desc="Cantarell Oblique Medium 20" draw-outline=true ! \
> textoverlay                             deltay=200 halignment=left valignment=top font-desc="Sans, 10"                    draw-outline=true ! \
> textoverlay text="Line 5"               deltay=250 halignment=left valignment=top font-desc="Sans, 10"                    draw-outline=true ! \
> textoverlay                             deltay=300 halignment=left valignment=top font-desc="Sans, 10"                    draw-outline=true ! \
> textoverlay                             deltay=350 halignment=left valignment=top font-desc="Sans, 10"                    draw-outline=true ! \
> textoverlay                             deltay=400 halignment=left valignment=top font-desc="Sans, 10"                    draw-outline=true ! \
> textoverlay text="Why"                  deltay=450 halignment=left valignment=top font-desc="Sans, 10"                    draw-outline=true ! \
> textoverlay text="Line 10"              deltay=500 halignment=left valignment=top font-desc="AdobeTimes Bold 10"          draw-outline=true ! \
>        tee name=t \
> 	t. ! queue ! xvimagesink sync=false \
>        t. ! queue ! \
> 	x264enc speed-preset=ultrafast tune=zerolatency byte-stream=true bitrate=4000 ! \
> 	mpegtsmux name=mux ! \
> 	filesink location='try5.mp4’

In case it helps anyone here is explanation and solution:

I had 2 usb-3 cameras plugged into a hub on a usb-c port (10000M)
but a bug in the kernel calls the hub 480M and 2 don’t go.
Either each camera on its own usb-hub or patch the kernal src

https://forums.developer.nvidia.com/t/use-gstreamer-to-open-two-usb-cameras-failed-to-allocate-required-memory/122843

James