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Production Info
Submitted by Sokrates on 2 February 2015
The original video has 6571 frames running at 30 fps.
The frames were transformed to black and white images of size 80x50 = 4000 pixel.
This version includes 490 frames. The frames were taken in equidistant steps from
the original. This results in 11 complete black frames, 4 complete white
frames, rest of the frames are with black and white content.
Each frame is compressed separately, so no delta packing is used.
The compression itself is lossless.
Three compression methods are applied:
1) Run-length encoding (RLE)
RLE optimized for this use case results in 66043 bytes = ~135 bytes per frame
2) Self-written new compression method
Applied on the RLE data. Size is reduced again from 66043 bytes to 58315 byte = ~ 119 bytes per frame
3) <a href="http://csdb.dk/release/?id=77754">ALZ64</a>
Reduce program (code+data) from 60646 bytes to 50845 to achieve a one-file version.
The main point of this demo was to introduce 2). My new compression method
is not the best on the market in terms of output size, but it is the
best on the market in terms of decompression time. It can be used on-the-fly
in a program e.g. to have more levels or more sprites in a game. |
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