How To Packaging and support for OpenMAX

Building GStreamer with GST-OpenMax

Introduction

This how-to will describe how to setup [GStreamer] a library for constructing graphs of media-handling components on the Pandaboard. Using [gst-openmax] a GStreamer plug-in that allows communication with OpenMAX IL components and [gst-ducati] a plugin for using the HW accellerated codecs on IVA-HD via the codec-engine API.

Configuring your environment

• These instructions have been tested on the Pandaboard Rev A1 running Fedora 17 ARM.
• Startup the Pandaboard and make sure you have internet connectivity.

• Install the Fedora 17 development tools

yum update
yum groupinstall "Development Tools" "Development Libraries"

• Add the RPM repositories containing the GStreamer plugins

rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm
rpm -Uvh http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm

• Install GStreamer plugins

yum install gstreamer-{ffmpeg,plugins-{good,ugly,bad{,-free,-nonfree}}} ffmpeg
yum install gstreamer-devel gstreamer-plugins-base-devel

Building OpenMAX IL

• Download the source code to a temporary directory

mkdir -p /tmp/omx
cd /tmp/omx
wget http://downloads.sourceforge.net/omxil/libomxil-bellagio-0.9.0.tar.gz

• Extract the tarball and configure the source code

tar -xvf libomxil-bellagio-0.9.0.tar.gz
cd liboxmil-bellagio-0.9.0
./configure --prefix=$HOME/omx

• Build and install

make
make install

Building GST-OpenMax

• Clone the git repository into a temporary directory

mkdir -p /tmp/omx
cd /tmp/omx
git clone git://anongit.freedesktop.org/gstreamer/gst-openmax

• Build and install

cd gst-openmax
./autogen.sh
./configure --prefix=$HOME/omx
make
make install

Testing OpenMax

• Check if the codecs have been sucessfully loaded

gst-inspect | grep *omx*

• Export environment variables for library and plugin directories

export GST_PLUGIN_PATH="/usr/local/lib/gstreamer-0.10:$HOME/omx/lib/gstreamer-0.10"
export LD_LIBRARY_PATH="/$HOME/omx/lib"

• Testing audio output using mp3 "test.mp3"

gst-launch-0.10 filesrc location="test.mp3" ! omx_mp3dec use-timestamps=false ! audioconvert ! alsasin