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G3 Conversion Utility (g3cvt)
November 2009 417
G3 Conversion Utility (g3cvt)
Converts a raw fax file between any of these formats—MH, MR,
MMR, PCX, and bitmap. It accepts files that use either MSB or LSB
bit order, and (optionally) skips past a Brooktrout 128-byte header.
Output from this utility does not contain a 128-byte Brooktrout
header.
As it proceeds, g3cvt displays dots across the screen. If it detects an
error in the input file, g3cvt displays an error message. With some
input formats, g3cvt cannot continue after it encounters an input
error.
For bitmap conversion, this utility uses raw bitmap format. The -w
option determines the number of bits per line, and the -b option
determines the bit order. Raw bitmap format does not use
start-of-image, end-of-line, or end-of-image marks.
When decoding MH or MR files, if this utility encounters an input
line with errors, it writes a copy of the previous line in the output
file.
To display usage information, type g3cvt without any arguments.
Command Syntax
g3cvt <i_fmt> <i_file> <o_fmt> <o_file> [options]
Where:
i_fmt Format of the input file—MH, MR, MMR, PCX, or BIT.
i_file Name of the input file.
o_fmt Format of the output file—MH, MR, MMR, PCX, or BIT.
o_file Name of the output file.
Options
-w<width> Specifies the width of the lines; A4 (default), B4, or A3.
-b<b_o> Specifies the bit order of both the input and output files –
M (MSB), the default, or L (LSB).