Video rendering on qtwidget using gstreamer

General Discussion
1

Hi Team,

I want to achieve video rendering on qtwidget using gstreamer. To achieve this I am using qt5videosink gstreamer plugin.

Below is my pipeline.

gst-launch-1.0 videotestsrc ! qt5videosink

But when I am running this pipeline on my linux machine. Pipeline is running but there is not output widget opening where I can see the video.

Logs:

User-2:~$  gst-launch-1.0 -v videotestsrc ! qt5videosink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0.GstPad:src: caps = video/x-raw, format=(string)BGRA, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstQtVideoSink_qt5:qtvideosink_qt5-0.GstPad:sink: caps = video/x-raw, format=(string)BGRA, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
Redistribute latency...
New clock: GstSystemClock
^Chandling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 0:00:05.508780834
Setting pipeline to NULL ...
Freeing pipeline ...

Can someone help me here, How we can achieve this?

Thanks

2

Where do you get qt5videosink from?

Generally, you need to create the UI yourself and then via the API of the element you can embed its video output into a Qt UI.

3

Hi @slomo,

I have install using ubuntu package manager.

User-2:~$ gst-inspect-1.0 qt5videosink
Factory Details:
Rank none (0)
Long-name Qt video sink
Klass Sink/Video
Description A video sink that can draw on any Qt surface
Author George Kiagiadakis george.kiagiadakis@collabora.com

Plugin Details:
Name qt5videosink
Description A video sink that can draw on any Qt surface
Filename /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstqt5videosink.so
Version 1.2.0
License LGPL
Source module qt-gstreamer
Binary package QtGStreamer (Debian)
Origin URL Debian Package Tracking System - qt-gstreamer

4

Hi @slomo,

Is there any way we can create a simple gstreamer pipeline to achieve video rendering over qtwidget,

5

qt-gstreamer is unmaintained and completely outdated at this point. There’s unfortunately no generic Qt video sink, but there’s a QML 5/6 video sink in gst-plugins-good if QML is an option for you.