1AdvanceCOMP MNG Compression UGteinleirtayl(1C)ommaAnddvsanMcaenCuOaMlP MNG Compression Utility(1)
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6 advmng - AdvanceCOMP MNG Compression Utility
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9 advmng [-l, --list] [-z, --recompress]
10 [-x, --extract] [-a, --add RATE MNG_FILE PNG_FILES...]
11 [-0, --shrink-store] [-1, --shrink-fast] [-2, --shrink-normal]
12 [-3, --shrink-extra] [-4, --shrink-insane] [-i, --iter N]
13 [-s, --scroll HxV] [-S, --scroll-square]
14 [-e, --expand] [-r, --reduce]
15 [-c, --lc] [-C, --vlc] [-f, --force] [-q, --quiet] [-v, --verbose]
16 [-h, --help] [-V, --version] FILES...
18 The main purpose of this utility is to recompress MNG files to get the
19 smallest possible size.
20 Please note that this utility is not able to read a generic file. It´s
22 granted to be able to read only the files generated by the AdvanceMAME
23 emulator.
24 To compress the files this utility uses the following strategies:
26 · Remove all ancillary chunks.
27 · Use the MNG Delta feature to compress video clips with only
28 small changes between frames.
29 · Use the MNG Move feature to compress video clips with a
30 scrolling background (option -s).
31 · Reduce the color depth to 8 bit (option -r).
32 · Use the 7zip Deflate implementation.
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35 -l, --list FILES...
36 List the content of the specified files.
37 -z, --recompress FILES...
39 Recompress the specified files. If the -1, -2, -3 options are
40 specified, it´s used the smallest file choice from the previous
41 compressed data and the new compression. If the -0 option is
42 specified the file is always rewritten without any compression.
43 -x, --extract FILES...
45 Extract all the .png frames in the .mng clips. You can use the
46 --shrink options to control the compression ratio of the .png
47 files. The extracted images are always 24 bit images with alpha
48 channel. You can remove the alpha channel with the -n option.
49 -a, --add RATE MNG_FILE PNG_FILES...
51 Compress all the .png files on the command line as a .mng file.
52 All the .png files must have the same size and the same bit
53 depth. You must also specify an integer frame rate to use in the
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56 -0, --shrink-store
57 Disable the compression. The file is only stored and not com‐
58 pressed. The file is always rewritten also if it´s bigger.
59 -1, --shrink-fast
61 Set the compression level to "fast" using the zlib compressor.
62 -2, --shrink-normal
64 Set the compression level to "normal" using the libdeflate com‐
65 pressor. This is the default level of compression.
66 -3, --shrink-extra
68 Set the compression level to "extra" using the 7z compressor.
69 You can define the compressor iterations with the -i, --iter
70 option.
71 -4, --shrink-insane
73 Set the compression level to "insane" using the zopfli compres‐
74 sor. You can define the compressor iterations with the -i,
75 --iter option.
76 -i, --iter N
78 Define an additional numer of iterations for the 7z and zopfli
79 compressors for modes -3 and -4. More iterations usually give a
80 better compression, but may require a lot more time. Try for
81 example with 10, 15, 20, and so on.
82 -s, --scroll HxV
84 The "-s HxV" option specifies the size of the pattern (H width x
85 V height) used to check for a scrolling background. The size is
86 expressed in pixels and it must be bigger or equal than the
87 scrolling speed of the background. For example take the game
88 1942 that scrolls vertically by 1 pixel every frame. If you
89 recorded with an interleave factor of 2 the vertical scrolling
90 speed is 1*2 = 2. In this case the minimum pattern is "-s 0x2".
91 Generally you can use "-s 8x8" and use bigger values only for
92 games scrolling faster. If the game scrolls only horizontally or
93 vertically you can speed up a lot the compression with monodi‐
94 rectional patterns like "-s 16x0" or "-s 0x16".
95 -S, --scroll-square N
97 This option is like the option "-s NxN" but excludes big move‐
98 ment on both directions reducing the computation time. Specifi‐
99 cally the check done is X+Y<=N.
100 -r, --reduce
102 Force the color reduction to 8 bit. The reduction is really done
103 only if any frame have less than 256 colors and if no alpha
104 channel is present. To force the reduction also if an alpha
105 channel is present use the -n option.
106 -e, --expand
108 Force the color expansion to 24 bit.
109 -n, --noalpha
111 Remove the alpha channel if present.
112 -c, --lc
114 Force the use of the MNG LC (Low Complexity) specifications. It
115 disables the delta compression. The file is always rewritten
116 also if it´s bigger.
117 -C, --vlc
119 Force the use of the MNG VLC (Very Low Complexity) specifica‐
120 tions. It disables the delta compression and the precise timing.
121 Warning! you may lose the correct timing information because the
122 VLC format only supports integer frequency. The file is always
123 rewritten also if it´s bigger.
124 -f, --force
126 Force the use of the new file also if it´s bigger.
127 -q, --quiet
129 Don´t print the filenames.
130 -v, --verbose
132 Print more information on the compression process.
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135 A good tradeoff of recompression and time is the command :
136 advmng -z -r -S 16 *.mng
138 To create a .mng file from a series of .png files use the command :
140 advmng -a 30 video.mng video*.png
142 To extract all the images in a .mng file use the command :
144 advmng -x video.mng
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148 This file is Copyright (C) 2003 Andrea Mazzoleni, Filipe Estima
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151 advzip(1), advpng(1), advdef(1)
152 AdvanceCOMP MNG Compression Utility(1)