On 02/11/2016 02:14 AM, Michael Niedermayer wrote:
On Thu, Feb 11, 2016 at 01:15:38AM +0100, Mats Peterson wrote:
On 02/11/2016 01:11 AM, Mats Peterson wrote:
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.
Nope, doesn't work. I forgot to use "-pix_fmt monow", and it's the
same as before.
have you tried updating your git checkout ?
it might be fixed by: 23261e60014908da7446e9b5bc7401dc30fdecd6
I just pulled the latest. Let's see what happens. It seems you've
changed the *bpp1 files in tests/ref/vsynth for some reason. I'm
creating a new patch here, since the old one will fail.
Mats
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