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gstreamer/gst/cutter
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Edward Hervey 50f4eb876a Fix memleak with gst_static_pad_template_get(). 
Original commit message from CVS:
* ext/cairo/gsttextoverlay.c: (gst_text_overlay_init):
* ext/dv/gstdvdemux.c: (gst_dvdemux_init), (gst_dvdemux_add_pads):
* ext/gdk_pixbuf/gstgdkpixbuf.c: (gst_gdk_pixbuf_init):
* ext/jpeg/gstjpegdec.c: (gst_jpeg_dec_init),
(gst_jpeg_dec_setcaps):
* ext/jpeg/gstjpegenc.c: (gst_jpegenc_init):
* ext/jpeg/gstsmokedec.c: (gst_smokedec_init):
* ext/jpeg/gstsmokeenc.c: (gst_smokeenc_init):
* ext/libmng/gstmngdec.c: (gst_mngdec_init),
(gst_mngdec_src_getcaps):
* ext/libpng/gstpngdec.c: (gst_pngdec_init),
(gst_pngdec_caps_create_and_set):
* ext/libpng/gstpngenc.c: (gst_pngenc_init):
* ext/mikmod/gstmikmod.c: (gst_mikmod_init):
* ext/speex/gstspeexdec.c: (gst_speex_dec_init):
* gst/alpha/gstalpha.c: (gst_alpha_init):
* gst/auparse/gstauparse.c: (gst_au_parse_init):
* gst/avi/gstavidemux.c: (gst_avi_demux_init),
(gst_avi_demux_handle_src_event), (gst_avi_demux_parse_stream):
* gst/cutter/gstcutter.c: (gst_cutter_init):
* gst/debug/efence.c: (gst_efence_init), (gst_efence_getrange),
(gst_efence_checkgetrange):
* gst/debug/negotiation.c: (gst_negotiation_init):
* gst/flx/gstflxdec.c: (gst_flxdec_init):
* gst/goom/gstgoom.c: (gst_goom_init):
* gst/rtp/gstasteriskh263.c: (gst_asteriskh263_init):
* gst/rtp/gstrtpL16depay.c: (gst_rtp_L16depay_init):
* gst/rtp/gstrtpL16pay.c: (gst_rtpL16pay_init):
* gst/rtp/gstrtpamrdepay.c: (gst_rtp_amr_depay_init):
* gst/rtp/gstrtpdepay.c: (gst_rtp_depay_init):
* gst/rtp/gstrtpmpadepay.c: (gst_rtp_mpa_depay_init):
* gst/rtsp/gstrtpdec.c: (gst_rtpdec_init):
* gst/smpte/gstsmpte.c: (gst_smpte_init):
* gst/wavparse/gstwavparse.c: (gst_wavparse_init),
(gst_wavparse_create_sourcepad):
Fix memleak with gst_static_pad_template_get().
This uses gst_pad_new_from_static_template() instead.
Fixes #333512
2006-03-15 16:17:12 +00:00
..
cutter.vcproj more working plugins 2004-07-27 21:41:30 +00:00
filter.func Initial revision 2001-12-22 23:27:31 +00:00
gstcutter.c Fix memleak with gst_static_pad_template_get(). 2006-03-15 16:17:12 +00:00
gstcutter.h expand tabs 2005-12-06 19:44:58 +00:00
Makefile.am port cutter 2005-11-21 19:50:25 +00:00
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