Custom streamer pipeline in QML

SGaist

Then you can set the stream as described here.

vicky_mac

@SGaist thanx for the info. Now pipeline works , but i have another issue.
I am using ZynqMPSoC board which has hardware acceleration for encoding and decoding. When i run simple pipeline from command line using gst-launch and kmssink it works fine. But when i use inside QML Mediaplayer it;s very slow and not useful at all.

I read some post where user said it's because of using videoconvert ! qtvideosink , because videoconvert is using processor of color conversion. Is there any way we can avoid videoconvert , because without this pipeline doesn't work.

SGaist

I just remembered, GStreamer now provides a sink for QML. You should check it.

vicky_mac

@SGaist do you have any example where qmlsink have been used inside gstreamer pipeline in qml file.

Actually my decoder is doesn't gibe RGB output its interleaved YUV format, which i am converting to RGB and that's causing too much delay.

Is there any way we can directly play interleaved YUV format in QML.

SGaist

Did you already check that GStreamer example ?

Interleaved YUV is a bit vague as there are many variants. Which one are you using ?

vicky_mac

@SGaist Output is of YUV 422 format. Yes i saw similar example but i get error module "org.freedesktop.gstreamer.GLVideoItem" is not installed.

SGaist

From memory that one is supported directly by Qt Quick.

Which version of Gstreamer are you using ?
Did you instal all the plugin packages ?

vicky_mac

@SGaist said in Custom streamer pipeline in QML:

of Gstreamer are you using ?

I am using GStreamer 1.16.1. and Qt 5.13.2.
while running gst-inpect i don't find gmlglsink. I have installed all the plugins but dont know from which plugin this package will be available.

I am using this pipeline:
MediaPlayer{
id: mediaplayer
source: "gst-pipeline: udpsrc port=11000 ! video/mpegts ! tsdemux ! h264parse ! omxh264dec ! videoconvert ! qtvideosink sync=false"

It runs fine but very slow due to videoconvert . I want to avoid videoconvert and trying to find out alternatives. Because its being done in my embedded processor and its very slow.

SGaist

It shall be available through the "good-plugins" package. See here.

vicky_mac

@SGaist gstreamer-plugin-good in enabled still error module org.freedesktop.gstreamer.GLVideoItem is not installed comes

SGaist

Can you show the GStreamer packages that you have in your installation ?

JoeCFD

@vicky_mac said in Custom streamer pipeline in QML:

module org.freedesktop.gstreamer.GLVideoItem

if vaapi is used in the pipeline on linux, install libva-dev