'blank the screen at will'

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List: gstreamer-devel
Subject: blank the screen at will
From: Gary Metalle <Gary.Metalle () rvl ! co ! uk>
Date: 2020-10-29 12:56:45
Message-ID: 1603976204516.76078 () rvl ! co ! uk
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Hi

Is it possible to easily blank the screen at will? i.e. send something to a sink to \
stop it displaying the last frame it had?

I have two use cases for this:

1. For a VOIP application at the end of a video call (or if the call is placed on \
hold) the last frame of the video remains on the LCD indefinitely. I tend to use \
sync=false on my sink btw. I would like to blank the screen after the video has \
finished.

2. When I don't have anything better to display on the screen, I display the current \
time using the clockoverlay. I pause this pipeline when I want to display video from \
a call but again, this still displays the last frame until the video appears and \
overwrites the display.

I am using an imx6 platform which has some custom Freescale sinks using the GPU and \
they generally have a 'clear-at-null' property which will blank the screen when the \
pipeline goes NULL. This is good when the application shuts down, but I don't \
generally set my pipeline states to NULL but to PAUSED.

Regards.

Gary.

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 Hi 

 

Is it possible to easily blank the screen at will? i.e.&nbsp;send something to a \
sink to stop it displaying the last frame it had? 
 

I have two use cases for this: 

 

1. For a VOIP application at the end of a video call (or if the call is placed on \
hold) the last frame of the video remains on the LCD indefinitely. I tend to use \
sync=false on my sink btw. I would like to blank the screen after the video has \
finished. 
 

2. When I don't have anything better to display on the screen, I display the \
current time using the clockoverlay. I pause this pipeline when I want to display \
video from a call but again, this still displays the last frame until the video \
appears and overwrites the display. 

 

I am using an imx6 platform which has some custom Freescale sinks using the GPU \
and they generally have a 'clear-at-null' property which will blank the screen when \
the pipeline goes NULL. This is good when the application shuts down, but I don't \
generally set my pipeline states to NULL but to PAUSED.&nbsp; 

 

Regards. 

 
Gary. 

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