Media - Custom Elements#
One of the most used functionality of GStreamer is the ability to create pipelines
from a text description, usually this is done from a CLI interface (e.g. on a terminal)
gst-launch program, in LiSP it’s possible to create a custom media-element
using this functionality.
From this point
element(s) refer to a GStreamer component and not to LiSP.
Sets the property to the specified value. You can use
gst-inspect to find out
about properties and allowed values of different elements.
ELEMENT-TYPE [PROPERTY_1 …]
Creates an element of type ELEMENT-TYPE and sets its PROPERTIES.
ELEMENT_1 ! ELEMENT_2 ! ELEMENT_3
The simplest link (exclamation mark) connects two adjacent elements. The elements are connect starting from the left.
The examples below assume that you have the correct plug-ins available.
Keep in mind that different elements might accept different formats, so you might
need to add converter elements like
audioresample (for audio)
in front of the element to make things work.
Add an echo effect to the audio:
audioecho delay=500000000 intensity=0.2 feedback=0.3
Add a reverb effect to the audio:
audioecho delay=20000000 intensity=0.4 feedback=0.45
Removes voice from sound (or at least try to do so):
audiokaraoke filter-band=200 filter-width=120
Remove voice from sound and (then) apply a reverb effect:
audiokaraoke filter-band=200 filter-width=120 ! audioecho delay=20000000 intensity=0.4 feedback=0.45
Extracted from the
GStreamer SDK docs <http://docs.gstreamer.com/display/GstSDK/gst-launch>_