GStreamer Tutorial udpsink created using instructions posted on Stack Overflow by Eduardo Fernando. Variable GSTREAMER_ROOT_ANDROID must be defined in /etc/profile or /home/USERNAME/.profile and show to a path where you have extracted GStreamer Android binaries, for example: export GSTREAMER_ROOT_ANDROID=/home/USERNAME/gstreamer-1.0-android-universal-1.14.2 If you're having trouble building the project, download and unzip revision 10e of the NDK, set path pointing to it in your project's settings and copy file source.properties from the up-to-date NDK folder to folder containing the 10e version. The app streams phone's main camera feed to a given IP address using openh264enc, default receiver's port number is 5000.

• Create local.properties and add sdk.dir and ndk.dir properties:

  ndk.dir=~/Library/Android/android-sdk-linux/android-ndk-r10e
  sdk.dir=~/Library/Android/android-sdk-linux

To play the video stream execute one of following commands on target machine:

gst-launch-1.0 udpsrc port=5000 ! h264parse ! avdec_h264 ! autovideosink
gst-launch-1.0 udpsrc port=5000 ! queue ! h264parse ! avdec_h264 ! queue ! videoscale ! video/x-raw,width=640,height=480 ! autovideosink

To play the video stream with rtph264pay enabled, execute:

gst-launch-1.0 udpsrc port=5000 caps='application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264' ! rtpjitterbuffer ! rtph264depay ! h264parse ! avdec_h264 ! autovideosink fps-update-interval=1000 sync=false

To play the audio stream, execute:

gst-launch-1.0 udpsrc port=5001 ! flacparse ! flacdec ! autoaudiosink sync=false

To play both video and audio, execute:

gst-launch-1.0 udpsrc port=5000 ! h264parse ! avdec_h264 ! autovideosink udpsrc port=5001 ! flacparse ! flacdec ! autoaudiosink sync=false

All commands can be copied to clipboard in the app. Enabling RTP packetization and setting port to 5600 makes the stream compatible with QGroundControl. Rotating your device before you start streaming will cause the stream to rotate accordingly. This feature can be disabled in preferences.