[FFmpeg-devel] a64 encoder

[Vitor Sessak]

Bitbreaker/METALVOTZE wrote:
>> You should be calculating the set of chars per frame or video and not
>> hardcode them.
>>   
> In case of multicolor mode, i calculate an optimized charset of 256 
> chars that cover 4000 blocks from the original 4 frames (thus having a 
> bit of quality loss). In case of Petscii i make use of the C64 charset 
> only (that the c64 has in its ROM furthermore), and not building any 
> dynamic charset on my own, so i can forgo on also putting a charset into 
> the video itself, and therefore add additional color information. 
> However in that case i need all origional characters from the c64 to be 
> able to compare them with each block of the picture.
> In case of ecmh mode i also rely on a static charset, but especially 
> prepared for maximum quality.

Is there any advantage of Petscii in comparison with ecmh?

> So having several ways for encoding is part of the idea.

Isn't it possible to have a single file format for all the ways of 
encoding? Maybe you could even encode in a way to permit files with 
non-constant lifetime like the following example:

CHARSET, FRAME, FRAME, CHARSET, FRAME, CHARSET, FRAME, FRAME, FRAME, 
FRAME, CHARSET, ...

-Vitor