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qmp3info(1) [debian man page]

qmp3info(1)							 quelcom man pages						       qmp3info(1)

NAME
qmp3info - show info from mp3 files SYNOPSIS
qmp3info [option]... file... DESCRIPTION
qmp3info reads a list of mp3 files and prints on standard output some of its parameters: version, layer, sample rate, bit rate, duration and tag. a duration summary is appended at the end of the list. OPTIONS
-c, --check check the entire stream (slower but accurate). all the frames of the stream are read and the total duration is exactly computed. this option is automatically activated if the stream appears to be vbr (have different bit rate frames). -h, --help show a brief help and exit. -s, --summary-only show only the summary. do not show info from every file. -v, --verbose show also the number of bytes and frames. -V, --version show version and exit. BUGS
variable bit rate (vbr) streams are detected by reading the initial (5) frames in the stream. if their bit rate field differs, the --check option is activated automatically. if vbr is not detected, qmp3info reads only the first frame in the stream and calculates the duration supposing that (1) the entire stream is composed by valid frames and (2) all the frames have the same bit rate. this is a fast way to compute the duration of the stream, but it is not exact: there's an error of 0.3% aprox. if you want to be accurate, or qmp3info is unable to detect a vbr stream, use --check. tests have been done only with mpeg version 1 layer iii streams, though it may (or not) work with other versions or layers. AUTHOR
dmanye@etse.urv.es http://www.etse.urv.es/~dmanye/quelcom/quelcom.html SEE ALSO
qmp3join(1), qmp3cut(1), qmp3check(1), qmp3report(1) qwavinfo(1), qwavjoin(1), qwavcut(1), qwavsilence(1), qwavfade(1), qwavheaderdump(1) quelcom 0.4.0 february 2001 qmp3info(1)

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qwavsilence(1)							 quelcom man pages						    qwavsilence(1)

NAME
qwavsilence - detect and shrink silence sequences in wav files SYNOPSIS
qwavsilence [option]... file... DESCRIPTION
qwavsilence reads a list of wav files looking for silence sequences. OPTIONS
-d <duration>[<format>], --duration=<duration>[<format>] duration is a positive integer that specifies the minimum duration of a silent sequence on a file to be reported. the value is treated as a sample number unless a format specifier is used. see the FORMATS section below for information. the default value is one second. -h, --help show a brief help and exit. -S, --shrink when this option is set, all the silent sequences greater than duration will be shrinked down to duration and the file size trun- cated accordingly. -t <threshold>, --threshold=<threshold> threshold is a percentage value respect the maximum (absolute) sample value. samples whose value is under the given threshold are considered silent. for example, a value of 2 means that all samples with absolute value under the 2% will be treated as silent sam- ples. the default value is 0. -v, --verbose show more detailed info. -V, --version show version and exit. FORMATS
the following modifiers are provided: j value is interpreted as milliseconds. m value is interpreted as minutes. s value is interpreted as seconds. b value is interpreted as bytes. k value is interpreted as kbytes (1024 bytes). M value is interpreted as megabytes (1024 kbytes). in either case, the values specified will be rounded to get an integer number of samples. BUGS
tests has been done only with 44100 Hz 16 bit stereo files, though it may work with mono/stereo 8/16 bits files. AUTHOR
dmanye@etse.urv.es http://www.etse.urv.es/~dmanye/quelcom/quelcom.html SEE ALSO
qwavinfo(1), qwavjoin(1), qwavcut(1), qwavfade(1), qwavheaderdump(1) qmp3info(1), qmp3join(1), qmp3cut(1), qmp3check(1), qmp3report(1) quelcom 0.4.0 february 2001 qwavsilence(1)
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