GStreamer pipelines for Qualcomm RB5 and RB6 with GstQtOverlay

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GStreamer Qt Overlay
Overview
Architecture Supported Platforms Capabilities Properties
Getting Started
Dependencies Evaluating GstQtOverlay Building GstQtOverlay Checking GstQtOverlay Install Running without Graphics Server
Examples
x86 PC NXP Qualcomm NVIDIA Jetson Use Cases
Performance
NVIDIA Jetson NVIDIA Jetson Nano NVIDIA Jetson Xavier NXP Qualcomm x86 PC
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Qualcomm Platform

Important:

The support of QtOverlay is partial. One of the requirements to make it work is to have a valid framebuffer device active (/dev/fbX). Connecting an HDMI screen to the board enables it. However, if your application does not include an HDMI output device, you may need to modify the device tree and/or graphics driver.

Moreover, it is required to enable the graphics service. Please, follow the steps for bringing up the display from our Qualcomm RB5 Developer Wiki

Qualcomm RB5 / RB6 examples

Before running the examples below, make sure you have set up the environment correctly.

export WAYLAND_DISPLAY=wayland-0
export XDG_RUNTIME_DIR=/usr/bin/weston_socket
export QT_QPA_PLATFORM=eglfs

If the element does not appear (gets blacklisted), please delete the cache: rm ~/.cache/gstreamer-1.0/registry.*

Now, you are able to run the following examples:

Save a video overlay using a video test source

gst-launch-1.0 videotestsrc is-live=1 ! "video/x-raw,width=1280,height=720,format=RGBA" ! qtoverlay qml=main.qml ! queue ! videoconvert ! queue ! x264enc ! h264parse ! qtmux ! filesink location=video.mp4 -e

Save a video overlay using a camera source

gst-launch-1.0 qtiqmmfsrc ! "video/x-raw,width=1280,height=720,format=NV12" ! queue ! videoconvert ! qtoverlay qml=main.qml ! queue ! videoconvert ! queue ! x264enc ! h264parse ! qtmux ! filesink location=video.mp4 -e