AdvanceCOMP MNG Compression Utility(1)			      General Commands Manual			    AdvanceCOMP MNG Compression Utility(1)

NAME

       advmng - AdvanceCOMP MNG Compression Utility

SYNOPSIS

       advmng [-l, --list] [-z, --recompress]
	    [-x, --extract] [-a, --add RATE MNG_FILE PNG_FILES...]
	    [-0, --shrink-store] [-1, --shrink-fast] [-2, --shrink-normal]
	    [-3, --shrink-extra] [-4, --shrink-insane]
	    [-s, --scroll HxV] [-S, --scroll-square]
	    [-e, --expand] [-r, --reduce]
	    [-c, --lc] [-C, --vlc] [-f, --force] [-q, --quiet] [-v, --verbose]
	    [-h, --help] [-V, --version] FILES...
DESCRIPTION

       The main purpose of this utility is to recompress MNG files to get the smallest possible size.

       Please  note that this utility is not able to read a generic file. It's granted to be able to read only the files generated by the Advance-
       MAME emulator.

       To compress the files this utility uses the following strategies:
       o      Remove all ancillary chunks.
       o      Use the MNG Delta feature to compress video clips with only small changes between frames.
       o      Use the MNG Move feature to compress video clips with a scrolling background (option -s).
       o      Reduce the color depth to 8 bit (option -r).
       o      Use the 7zip Deflate implementation.

COMMANDS

       -l, --list FILES...
	      List the content of the specified files.

       -z, --recompress FILES...
	      Recompress the specified files. If the -1, -2, -3 options are specified, it's used the smallest file choice from the  previous  com-
	      pressed data and the new compression. If the -0 option is specified the file is always rewritten without any compression.

       -x, --extract FILES...
	      Extract all the .png frames in the .mng clips.  You can use the --shrink options to control the compression ratio of the .png files.
	      The extracted images are always 24 bit images with alpha channel.  You can remove the alpha channel with the -n option.

       -a, --add RATE MNG_FILE PNG_FILES...
	      Compress all the .png files on the command line as a .mng file. All the .png files must have the same size and the same  bit  depth.
	      You must also specify an integer frame rate to use in the

OPTIONS

       -0, --shrink-store
	      Disable the compression. The file is only stored and not compressed. The file is always rewritten also if it's bigger.

       -1, --shrink-fast
	      Set the compression level to "fast".

       -2, --shrink-normal
	      Set the compression level to "normal". This is the default level of compression.

       -3, --shrink-extra
	      Set the compression level to "extra".

       -4, --shrink-insane
	      Set the compression level to "insane". It's VERY SLOW.

       -s, --scroll HxV
	      The  "-s	HxV"  option  specifies the size of the pattern (H width x V height) used to check for a scrolling background. The size is
	      expressed in pixels and it must be bigger or equal than the scrolling speed of the background. For example take the game	1942  that
	      scrolls  vertically  by 1 pixel every frame. If you recorded with an interleave factor of 2 the vertical scrolling speed is 1*2 = 2.
	      In this case the minimum pattern is "-s 0x2".  Generally you can use "-s 8x8" and use bigger values only for games scrolling faster.
	      If  the  game  scrolls only horizontally or vertically you can speed up a lot the compression with monodirectional patterns like "-s
	      16x0" or "-s 0x16".

       -S, --scroll-square N
	      This option is like the option "-s NxN" but excludes big movement on both directions reducing the computation time. Specifically the
	      check done is X+Y<=N.

       -r, --reduce
	      Force the color reduction to 8 bit. The reduction is really done only if any frame have less than 256 colors and if no alpha channel
	      is present. To force the reduction also if an alpha channel is present use the -n option.

       -e, --expand
	      Force the color expansion to 24 bit.

       -n, --noalpha
	      Remove the alpha channel if present.

       -c, --lc
	      Force the use of the MNG LC (Low Complexity) specifications. It disables the delta compression.  The file is always  rewritten  also
	      if it's bigger.

       -C, --vlc
	      Force  the  use of the MNG VLC (Very Low Complexity) specifications. It disables the delta compression and the precise timing. Warn-
	      ing! you may lose the correct timing information because the VLC format only supports integer frequency. The file is always  rewrit-
	      ten also if it's bigger.

       -f, --force
	      Force the use of the new file also if it's bigger.

       -q, --quiet
	      Don't print the filenames.

       -v, --verbose
	      Print more information on the compression process.

EXAMPLES

       A good tradeoff of recompression and time is the command :

	   advmng -z -r -S 16 *.mng

       To create a .mng file from a series of .png files use the command :

	   advmng -a 30 video.mng video*.png

       To extract all the images in a .mng file use the command :

	   advmng -x video.mng

COPYRIGHT

       This file is Copyright (C) 2003 Andrea Mazzoleni, Filipe Estima

SEE ALSO

       advzip(1), advpng(1), advdef(1)

													    AdvanceCOMP MNG Compression Utility(1)