APNG Assembler 2.91



  Creates APNG animation from PNG/TGA image sequence.



  http://apngasm.sourceforge.net/



  Copyright (c) 2010-2016 Max Stepin

  maxst@users.sourceforge.net



  License: zlib license



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  Changes in version 2.91:



- Code refactoring, some small optimizations

- CLI: Support for image strips as input

- GUI for Windows: progress bar bug fixed

- 64 bit biraries for Windows



  Changes in version 2.9:



- Duplicate frames optimization (add frame delays)



  Changes in version 2.8:



- Added 7zip and Zopfli compression options

- Added GUI version for Windows



  Changes in version 2.7:



- Better optimization after loading paletted PNG files



  Changes in version 2.6:



- Fixed a bug with loading 1,2,4-bit paletted PNG files



  Changes in version 2.5:



- Fixed a bug with loading mode2 or mode0 input files with tRNS



  Changes in version 2.4:



- Reads delay information from .txt files

- Accepts input files of different color types

- Better optimization

- zlib license



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Usage:



apngasm output.png frame001.png [options]

apngasm output.png frame*.png   [options]



Options :

1 10    : frame delay is 1/10 sec. (default)

-l2     : 2 loops (default is 0, forever)

-f      : skip the first frame

-hs##   : input is horizontal strip of ## frames (example: -hs12)

-vs##   : input is vertical strip of ## frames   (example: -vs12)

-kp     : keep palette

-kc     : keep color type

-z0     : zlib compression

-z1     : 7zip compression (default)

-z2     : Zopfli compression

-i##    : number of iterations (default -i15)



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Example 1:



Let's say you have following frame sequence:

frame01.png

frame02.png

frame03.png



And you want to have 3/4 seconds delay between frames.

The correct command will be



apngasm output.png frame01.png 3 4





If frame02.txt is found with the following one-line content,

it will override delay information for frame 2:



delay=25/100



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Example 2:



The same as above, but you added "invisible" frame00.png :

frame00.png - invisible

frame01.png

frame02.png

frame03.png



The correct command will be



apngasm output.png frame00.png 3 4 /f



That way APNG supported browsers and image viewers

will show frame01-frame02-frame03 animation,

while IE will display static frame00.png image.



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Example 3:



apngasm output.png frame01.png



That way you'll get 1/10 sec delay.



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Example 4:



Using this 2900x100 "filmstrip" image as input:

https://abs.twimg.com/a/1470716385/img/animations/web_heart_animation.png



apngasm output.png web_heart_animation.png -hs29



Switch -hs29 specifies that input is horizontal strip of 29 frames



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Some optimizations used in APNG Assembler might re-sort the

palette, or change the color type from RGBA and RGB modes

to RGB and indexed modes. Those optimizations are only performed

when they are lossless, but if you want to avoid changing the

palette or colortype, use those switches to turn them off:



/kp     : keep palette

/kc     : keep color type