GStreamer and Linux, screen recording works well on Xorg but not on Wayland.

[Davide Perini]

Ok, that snippet return a path=79

python3 snippet.py

it asks me if I want to record the screen full size or windowed, but 
there is no screen recording.
should I see a file of the recorded video? what that snippet should do?

I am even trying to do this command:
gst-launch-1.0 pipewiresrc path=79 ! videoconvert ! autovideosink
this command open a window, but there is no visible output.

Any further suggestions are appreciated.

Thanks
Davide

Il 2023-07-15 12:51 Nicolas Dufresne via gstreamer-devel ha scritto:

> Le ven. 14 juill. 2023, 07 h 15, Davide Perini via gstreamer-devel 
> <gstreamer-devel at lists.freedesktop.org> a écrit :
> 
>> Thanks for the answer, I really appreciate it.
>> 
>> Is it possible to run a command to check if everything works?
>> I mean can I test it with a command like this before developing my 
>> integration in my software?
>> 
>> Isn't this command the right one to use?
>> 
>> gst-launch-1.0 pipewiresrc ! fd=%d path=%u ! videoconvert ! 
>> xvimagesink
>> 
>> If yes, how can retrieve the right fd and path variable to use using 
>> CLI?
>> 
>> I want to test it via CLI before developing a software for it if 
>> possible.
> 
> The attached program is in python and should just work.
> 
> python3 snippet.py
> 
> The path is return through a dbus IPC call.
> 
> Nicolas
> 
> Thanks!!!
> Davide
> 
> Il 13/07/2023 15:58, Nicolas Dufresne via gstreamer-devel ha scritto:
> Hi Davide,
> 
> Le mardi 11 juillet 2023 à 23:45 +0200, Davide Perini via 
> gstreamer-devel a écrit :
> Hi all,
> I'm trying to use GStreamer on Wayland and it seems to have some 
> problems...
> 
> This pipeline:
> gst-launch-1.0 ximagesrc startx=1 endx=3839 starty=0 endy=2159 ! 
> video/x-raw,framerate=30/1 ! videoscale method=0 ! ximagesink
> 
> works well on Xorg, but not on Wayland.
> 
> ximagesrc will have very little use anyway on Wayland, as wayland have 
> built-in privacy security. Please consider using the appropriate portal 
> and pipewire streams for this purpose. The following link is an example 
> on how to do this in your own application.
> 
> https://gitlab.gnome.org/-/snippets/19
> 
> Nicolas
> 
> On wayland I have this error:
> Setting pipeline to PAUSED ... Pipeline is live and does not need 
> PREROLL ... Pipeline is PREROLLED ... Setting pipeline to PLAYING ... 
> New clock: GstSystemClock Redistribute latency... WARNING: from element 
> /GstPipeline:pipeline0/GstXImageSink:ximagesink0: Pipeline construction 
> is invalid, please add queues. Additional debug info: 
> ../gstreamer/subprojects/gstreamer/libs/gst/base/gstbasesink.c(1249): 
> gst_base_sink_query_latency (): 
> /GstPipeline:pipeline0/GstXImageSink:ximagesink0: Not enough buffering 
> available for the processing deadline of 0:00:00.015000000, add enough 
> queues to buffer 0:00:00.015000000 additional data. Shortening 
> processing latency to 0:00:00.000000000. WARNING: from element 
> /GstPipeline:pipeline0/GstXImageSink:ximagesink0: Pipeline construction 
> is invalid, please add queues. Additional debug info: 
> ../gstreamer/subprojects/gstreamer/libs/gst/base/gstbasesink.c(1249): 
> gst_base_sink_query_latency (): 
> /GstPipeline:pipeline0/GstXImageSink:ximagesink0: Not enough buffering 
> available for the processing deadline of 0:00:00.015000000, add enough 
> queues to buffer 0:00:00.015000000 additional data. Shortening 
> processing latency to 0:00:00.000000000. X Error of failed request: 
> BadMatch (invalid parameter attributes) Major opcode of failed request: 
> 73 (X_GetImage) Serial number of failed request: 52 Current serial 
> number in output stream: 52 Is there any fix for this since Xorg is 
> going to be deprecated everywhere? :) Thanks Davide
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