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gstreamer/gst/cutter
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Nirbheek Chauhan b09f478e80 Add support for Meson as alternative/parallel build system 
https://github.com/mesonbuild/meson

With contributions from:

Tim-Philipp Müller <tim@centricular.com>
Jussi Pakkanen <jpakkane@gmail.com> (original port)

Highlights of the features provided are:
* Faster builds on Linux (~40-50% faster)
* The ability to build with MSVC on Windows
* Generate Visual Studio project files
* Generate XCode project files
* Much faster builds on Windows (on-par with Linux)
* Seriously fast configure and building on embedded

... and many more. For more details see:

http://blog.nirbheek.in/2016/05/gstreamer-and-meson-new-hope.html
http://blog.nirbheek.in/2016/07/building-and-developing-gstreamer-using.html

Building with Meson should work on both Linux and Windows, but may
need a few more tweaks on other operating systems.
2016-08-20 11:21:12 +01:00
..
filter.func Initial revision 2001-12-22 23:27:31 +00:00
gstcutter.c good: use new gst_element_class_add_static_pad_template() 2016-03-24 14:32:20 +02:00
gstcutter.h Fix FSF address 2012-11-04 00:07:18 +00:00
Makefile.am Remove obsolete Android build cruft 2015-04-26 17:55:07 +01:00
meson.build Add support for Meson as alternative/parallel build system 2016-08-20 11:21:12 +01:00
README Initial revision 2001-12-22 23:27:31 +00:00

README 

cutter plugin by thomas <thomas@apestaart.org>

SYNOPSIS

This plugin emits signals when RMS level of audio signal crosses a
threshold for a given amount of time.  

As soon as the buffer's RMS is greater than the threshold value, the plugin fires a CUT_START signal.

When the buffer's RMS level drops below the threshold value for a consecutive run length longer than the given runlength, it sends a CUT_STOP signal.

When a pre-recording buffer is used, the plugin will delay throughput of data when it's in "silent" mode for a maximum length equal to the pre-recording buffer length.  As soon as the input level crosses the threshold level, this pre-recorded buffer is flushed to the src pad (so you can actually record the audio just before the threshold crossing) after sending the signal.

ARGUMENTS

GstCutter::threshold
	level (between 0 and 1) of threshold
GstCutter::threshold_dB
	level of threshold in dB (between -inf and 0)
GstCutter::runlength
	minimum length (in seconds) before plugin sends cut_stop signal
GstCutter::prelength
        length of pre-recording buffer
        
SIGNALS

	CUT_START
	gets sent when the level of the signal goes above threshold level
	CUT_STOP
	gets sent when the level of the signal has been below the
	threshold level for a number of consecutive iterations of which
	the cumulative length is more than the runlength

LIMITATIONS

	* RMS value is calculated over the whole data buffer, so
	  the time resolution is limited to the buffer length
	* RMS value is calculated over all of the channels combined