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This is a simple demo application based on https://github.com/ystreet/qt-gstreamer-android (GStreamer with Qt on Android)
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Franz Geffke b1fcbb1a22
 added more notes
2023-04-25 19:20:46 +01:00
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README.md added more notes 2023-04-25 19:20:46 +01:00

README.md

Qt, QML and GStreamer on Android

This is a simple demo application based on https://github.com/ystreet/qt-gstreamer-android. We struggled with this for a bit, so I figured I share the "package" with Docker environment, for everone's benefit. All credits go to the original author ystreet.

  • Qt 5.15.8
  • GStreamer 1.20.6
  • Android NDK 21
  • Target SDK 30 (min 16)

Usage

  1. Run docker container:
$ docker-compose up -d
  1. build the demo application inside the container:
docker exec -it demo-monitor bash

# docker shell
cd /usr/src
mkdir -p android/src/org/freedesktop/gstreamer/androidmedia
cp /vendor/cerbero/build/dist/android_universal/armv7/share/gst-android/ndk-build/androidmedia/* android/src/org/freedesktop/gstreamer/androidmedia/
mkdir build && cd build
/opt/Qt-android-5.15.8-lts-lgpl/bin/qmake ANDROID_ABIS="armeabi-v7a arm64-v8a" ../demo-monitor.pro
make -j$(nproc)
make apk

You can also run bash build.sh once you're in the container.

  1. the logs are accessible using the adb logcat command once the application is running:
$ adb logcat | grep -E '(demo-monitor|GStreamer)'

Note: Depending on your Android release you might have to manually grant permissions to the application via System Settings to see the camera output.

Notes

We currently use GStreamer 1.20.6. Using 1.22.2 you will need to make some changes to avoid build issues like:

clang++: error: no such file or directory: '/vendor/cerbero/build/dist/android_universal/armv7/lib/gstreamer-1.0/libgstvideoconvert.a'
clang++: error: no such file or directory: '/vendor/cerbero/build/dist/android_universal/armv7/lib/gstreamer-1.0/libgstvideoscale.a'

and more:

/vendor/cerbero/build/sources/android_universal/armv7/glib-2.74.4/_builddir/../glib/gregex.c:1025: error: undefined reference to 'pcre2_match_context_free_8'
/vendor/cerbero/build/sources/android_universal/armv7/glib-2.74.4/_builddir/../glib/gregex.c:1027: error: undefined reference to 'pcre2_match_data_free_8'
/vendor/cerbero/build/sources/android_universal/armv7/glib-2.74.4/_builddir/../glib/gregex.c:1664: error: undefined reference to 'pcre2_code_free_8'
/vendor/cerbero/build/sources/android_universal/armv7/glib-2.74.4/_builddir/../glib/gregex.c:1097: error: undefined reference to 'pcre2_jit_match_8'
...