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)