GStreamer 101

Yuvi Pandahttp://yuvi.in

Who the talk is for

GStreamer newbies

What is GStreamer?

 

Pipeline based Multimedia Framework

 

Why use GStreamer?

 

How do you hide a mountain?

SEP

Language Bindings

C, C++, Python, C#, etc

Codecs

Containers

 

Elements

 

Source and Sink Elements

Filters, Bins and Ghost Pads

pipeline, decoders

Multiple Pads

Core Plugins

Base Plugins

Good` Plugins

Bad Plugins

Ugly Plugins

Where do elements live?

Tools

gst-inspect-0.10

gst-launch-0.10

Debian Package: gstreamer-tools

Examples

Using gst-launch-0.10

Using Python

Play MP3

gst-launch-0.10 filesrc location="$FILEPATH" !

mad ! audioconvert ! audioresample ! autoaudiosink

MP3 to OGG

gst-launch-0.10 filesrc location="$MP3FILE" !

mad ! audioconvert ! vorbisenc ! oggmux !

filesink location="$OGGFILE”

Anything to OGG

gst-launch-0.10 filesrc location="$MP3FILE" !

decodebin2 ! audioconvert ! vorbisenc ! oggmux !

filesink location="$OGGFILE”

Play Theora Video

gst-launch-0.10 filesrc location="$THEORASRC" !

oggdemux name=d d. ! queue ! theoradec ! ffmpegcolorspace !

ximagesink d. ! queue ! vorbisdec ! audioconvert ! audioresample !

autoaudiosink

Python examples

Thank you!