Black and White video

[Guorilla]

Is there anything different about ripping/encoding a black and white movie? Can one use a higher bitrate, or does the lack of colour not have an effect on that? For the record, it's Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb.

Cheers,
G

"Gentlemen! You can't fight in here, this is the War Room!"

[-h]

You should serve it in avisynth and find a saturation filter that works in the YUV colorspace - I can't remember the filter name. Set the saturation to 0%, and you'll remove any trace of colour that could raise the bitrate.

-h

[Acaila]

You could use the "greyscale" filter made by Steady to do this. He posted it in the Avisynth section a while ago.

[movmasty]

as i understand Guorilla doesnt need to remove colour noise
just asking infos on BW compression.

do this test Guorilla:
encode 100secs of a colour movie with divx fast motion
then remove color and encode as BW
you will note that the size of BW test will be smaller.

this means 2 things
1)if you encode a bw movie at a constant quantizer, you will get less size
2)if u encode it at same birate you will get more quality,as encoding a colour movie at an higer bitrate.

we dont need an 8bits codec,as mpg compression is able to just use the minimum number of colours.

another thing, bw movies are more compressable,
i mean that not only you can get less size due to the lack of colours, but you can compress them still more.
a bw movie compressed at drf 4, could look as good as a colour one compressed at drf 3.