How to play two different videos in two different displays simultaneously using gstreamer?

[Daniel Rossi]

This area seems of interest.

https://www.raspberrypi.org/forums/viewforum.php?f=67

------ Original Message ------
From: "Daniel Rossi" <electroteque at gmail.com>
To: "Discussion of the development of and with GStreamer" 
<gstreamer-devel at lists.freedesktop.org>; "Discussion of the development 
of and with GStreamer" <gstreamer-devel at lists.freedesktop.org>
Sent: 9/13/2019 1:02:36 AM
Subject: Re[2]: How to play two different videos in two different 
displays simultaneously using gstreamer?

>I just saw a pipeline like this. The id is set here. But no idea what 
>the id means. Somebody mentioned 32 is screen 1 and 64 is screen 2.
>
>As far as hardware decoding goes. Is video4linux the appropriate one to 
>use or OpenMax, and does playbin3 detect this automatically ?
>
>gst-launch-1.0 -vvv -e filesrc location=big_buck_bunny_720p_h264.mkv ! 
>matroskademux ! h264parse ! v4l2h264dec ! kmssink plane-id=64
>
>------ Original Message ------
>From: "Nicolas Dufresne" <nicolas at ndufresne.ca>
>To: "Discussion of the development of and with GStreamer" 
><gstreamer-devel at lists.freedesktop.org>
>Sent: 9/12/2019 10:50:44 PM
>Subject: Re: How to play two different videos in two different displays 
>simultaneously using gstreamer?
>
>>Le jeudi 12 septembre 2019 à 06:56 -0500, NikhilMG a écrit :
>>>  I am using
>>>  1. Raspberry Pi 4 Model B which has 2 HDMI ports.
>>>  2. Gstreamer-1.0
>>>
>>>  I have two videos saved in memory card. I want to drive two videos to two
>>>  different HDMI port and play videos in two different Displays
>>>  simultaneously. I would like to know the Gstreamer pipeline to access the
>>>  HDMI-1 and HDMI-2 ports and also play two different videos in different
>>>  displays simultaneously.
>>>
>>>  Here I am trying to drive video.mp4 to HDMI-2.
>>>  */gst-launch-1.0 playbin3 videosink="mfw-v4lsink device=dev/video18"
>>>  uri=file:///home/pi/Downloads/video.mp4/
>>
>>mfw-v4l2sink looks like one of Freescale plugin. The Raspberry Pi has
>>stanard DRM drivers for the display. The easiest way is to start X11 or
>>Wayland (weston), and then use the appropriate API to select the output
>>to display on, this needs some programming of course.
>>
>>The alternative is to use kmssink, but that right now can only work if
>>the two connectors can run on seperate CRTC, I don't know (and haven't
>>tested yet) what is possible on the PI. I believe I can guide you on
>>how to improve kmssink.
>>
>>>  *
>>>  I even tried
>>>  */gst-launch-1.0 playbin3 videosink="mfw-v4lsink device=HDMI-2"
>>>  uri=file:///home/pi/Downloads/video.mp4
>>>  / *
>>>  and also tried
>>>  */gst-launch-1.0 playbin3 videosink="mfw-v4lsink device=dev/HDMI-2"
>>>  uri=file:///home/pi/Downloads/video.mp4
>>>  /*
>>>  I am not able to drive the video to HDMI-2 port. I expect the video to be
>>>  played in HDMI-2, but the actual output is coming in HDMI-1 for all the
>>>  above 3 given pipelines.
>>>
>>>
>>>
>>>
>>>
>>>  --
>>>  Sent from: http://gstreamer-devel.966125.n4.nabble.com/
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>>>  gstreamer-devel mailing list
>>>gstreamer-devel at lists.freedesktop.org
>>>https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
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