On 02/11/2016 12:07 AM, Mats Peterson wrote:
For black & white AVI or QuickTime files, in order to produce a
monochrome nut file, force the pixel format with "-pix_fmt monow" or
"-pix_fmt monob".
Unfortunately, there is a problem with converting from pal8 to monow,
and I know what it is now. There seems to be some weird dithering going
on of the white color, so there will be black pixels here and there in
the monow output. A better way is to use "ffmpeg -i 1bpp.avi -vcodec
copy -vtag B1W0 1bpp.nut". The "-vtag" option is currently needed,
otherwise FFmpeg will use a RGB[15] codec tag for some reason.
An alternative is to use "-sws_dither none", it seems to work fine. I
just don't understand why the fully white color is dithered at all when
converting from pal8 to monow.
Mats
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