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08-31-2003, 10:49 PM
leo leo is offline
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Hi guys.
I just encoded some black & white? avi files, even tough the results were good it made me think on certain isues:

1) How do I know for sure that certain avi (dvd, or other source) is a real B&W movie?, because in one I did notice some sephia colouring and Im not sure is color or monitor effect.

2) Once I know Im dealing with B&W source, wath would be the right script? Wich filters have a effect or not, on this kind of souce? Are there some filter we should not apply?
This question is related to avisinth filters so I will apreciate somebody point me where i can foud information about this subject.

thanks in advance.
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Someday, 12:01 PM
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09-01-2003, 10:19 AM
sh0dan sh0dan is offline
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1) Use Coloryuv(analyze=true). Watch the U/V values. For "true" black+white, both should average around 127-128. Check maximum+minimum to check if there is chroma noise.

2) Use greyscale() to kill all remaining color.
Regards, sh0dan // VoxPod
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