File: maplay.1

package info (click to toggle)
maplay 1.2b-5
  • links: PTS
  • area: main
  • in suites: slink
  • size: 432 kB
  • ctags: 441
  • sloc: cpp: 5,421; sh: 97; makefile: 86
file content (86 lines) | stat: -rw-r--r-- 2,433 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
.TH MAPLAY 1 "1.2" ""
.SH NAME
maplay, maplay-ulaw \- play a layer I or layer II MPEG audio stream
.SH SYNOPSIS
.B maplay
[\-v] [\-s] [\-l] [\-r] [\-us] [\-uh] [\-ul] [\-amd] [\-c] [\-f 
.I ushort
] 
.I filename

.B maplay-ulaw
[\-v] [\-s] [\-l] [\-r] [\-us] [\-uh] [\-ul] [\-amd] [\-c] [\-f 
.I ushort
] 
.I filename
.SH DESCRIPTION
The
.I maplay
program decodes layer I and layer II MPEG audio streams and plays them
using a CD-quality audio device.  It supports all modes, which are
single channel, stereo, joint stereo and dual channel, and all
bitrates except free mode.

The
.I maplay-ulaw
program decodes layer I and layer II MPEG audio streams and converts
them to 8 bit u-law samples at a rate of 8 kHz, no matter what
frequency the stream uses.
.SH OPTIONS
.TP
.I "filename"
filename of a MPEG audio stream or \- for stdin
.TP
.I "-h"
short help
.TP
.I "-v"
.B "verbose mode" \-
Returns information about the stream, like mode, bitrate, and
copyright.
.TP
.I "-s"
.B "stdout mode" \-
Decodes the stream to stdout.  The created output contains 16 bit
signed PCM samples.  The output of the
.I maplay-ulaw
program consists of 8 bit u-law samples at a 8 kHz rate.  If the
stream is in stereo mode, the samples of both channels are
interleaved, the sample for the left channel first.
.TP
.I "-l"
Decodes (and plays) the left channel of stereo streams only.  This
option halves the required CPU time.
.TP
.I "-r"
Same as
.I "-l",
but decodes the right channel only
.TP
.I "-ul"
This option is available on machines with the dbri device and sends
the audio output to the line out jack.
.TP
.I "-amd"
Forces maplay to treat /dev/audio as an amd device.  Use it
if your SPARC clone has an amd device, but maplay doesn't recognize
it.  This option may also be used on a machine with a dbri device,
because the dbri device can also produce u-law output.
.TP
.I "-c"
Reports filter range violations to stderr.  Sometimes PCM values
calculated by the synthesis filter exceed the 16 bit boundary and
must be mapped to these boundaries.
.TP
.I "-f ushort"
Use this scalefactor instead of the default value 32768 for the
synthesis filter.  Range violations can be reduced or eliminated with
this option, but lower scalefactor values reduce the signal-to-noise
ratio, too.
.SH COPYRIGHT
Copyright (C) 1993, 1994 Tobias Bading
.SH AUTHOR
Tobias Bading,
Berlin University of Technology
.SH "DEBIAN MAINTAINER"
Brian Mays  <brian@debian.org>