Avisynth: Changes to script for B&W films?
 

I have been using the MA script , gonna be encoding a black & white film , do i need to make any changes to the script?

Thanks in Advance.

You may want to place GreyScale() after your MPEG2Source/AVISource line to make sure that there is no chroma information.

You can also drop MergeChroma(Blur(1.5)) as it's of no use with B/W films.

Xvid codec has a black and white encoding mode which disregards color.
but i never used, don't know about the results.

tweak filter have the saturation adjust..turn to zero!
that i tested and works!

Steady filter :
http://home.midwest.net/~steady/greyyuy2.zip

maybe one of them can help too!
:wink:

Using GreyScale() does the same trick, but it's an internal filter so no need to download anything :wink:

great Boulder!
i don't knew that.
:wink:

guess I should've read this thread before I managed to squeeze a 3hr 24min B&W movie onto one KSVCD (352x288). It has an audio lag of about half a second, but since it's Japanese (with subs) then that really doesn't matter all that much.

So, my question - would the Greyscale() filter make much difference? To what? Filesize? CQ? both?

I became curious cos I felt really amazed to squeeze this full movie onto one 80min CDR and thought it maybe had something to do with it being old and B&W. I mean, because there are less colours to encode with each frame, shouldn't it logically follow that it will take less time AND/OR effort to encode compared to a full colour movie of the same length?

As usual, I'm only just thinking as I type.... :wink:

fingerbob wrote:
"would the Greyscale() filter make much difference? To what? Filesize? CQ? both? "

maybe everything change and not only one parameter my friend.
nothing is bettert than tests (i think)
:idea:
use trim (xxxx,xxxx) round 3000 frames in each script and encode....
will be faster and you remove all doubts about quality, size...etc!

:wink: