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author | Andy Wingo <wingo@pobox.com> | 2001-12-22 23:27:31 +0000 |
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committer | Andy Wingo <wingo@pobox.com> | 2001-12-22 23:27:31 +0000 |
commit | 185612aae3b8acae2b32e0e6561691a7c640cd0d (patch) | |
tree | 7cd1990c3df5c63f402f3e0bdf6b51b3ed58fc41 /gst/cutter/README | |
parent | 87dab192cf5792f847a22e0c3e9afe78553739b5 (diff) |
Initial revision
Original commit message from CVS:
Initial revision
Diffstat (limited to 'gst/cutter/README')
-rw-r--r-- | gst/cutter/README | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/gst/cutter/README b/gst/cutter/README new file mode 100644 index 00000000..fc0975e3 --- /dev/null +++ b/gst/cutter/README @@ -0,0 +1,38 @@ +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 |