Two Questions

rookworm3 · 3rd January 2002, 03:28

Ok -- one dumb and one (hopefully) not so dumb:

1- What settings sould one use for B&W movies (presumably, the normal ones are pretty redundant in this case considering they allow for the possibility of color)?

2- I may be missing something obvious, but I can't figure out how to preform two- pass encoding on a specific segment rather than the whole clip (i.e. I select a portion of the film to encode; press F8 and it starts encoding from the beginning -- works fine when I use "save avi"). What am I doing wrong?

rmatei · 3rd January 2002, 14:42

1) Wrong thinking; DVDs and divx are both YUV compression formats. B&W would be redundant for RGB but due to the way YUV stores color it's not. I won't go into details but you can look for an explanation of YUV formats if you want to understand why.

2) Nandub has a problem with selecting range inside it for the first pass. As you said, it always does the whole source. To get around this you habe to create a separate d2v file with the portion you want, or if you're using Avisynth you can clip the portion you want in the script.

LotionBoy · 3rd January 2002, 20:03

you can also just select what you don't want, delete those frames and do a first pass/2nd pass on what is left.

LotionBoy

sibe · 4th January 2002, 00:37

But keep in mind that if you do 1st/2nd pass only for a part of the movie the scene will look different than if you do the whole movie. To see what a scene will look like in a "real" encoding you have to do at least the first pass for the whole movie and then the second pass of your selected scene only.

Sibe

3rd January 2002, 03:28	#1 \| Link
rookworm3 Registered User Join Date: Jan 2002 Posts: 11	Two Questions Ok -- one dumb and one (hopefully) not so dumb: 1- What settings sould one use for B&W movies (presumably, the normal ones are pretty redundant in this case considering they allow for the possibility of color)? 2- I may be missing something obvious, but I can't figure out how to preform two- pass encoding on a specific segment rather than the whole clip (i.e. I select a portion of the film to encode; press F8 and it starts encoding from the beginning -- works fine when I use "save avi"). What am I doing wrong?

3rd January 2002, 14:42	#2 \| Link
rmatei newbie extraordinaire Join Date: Oct 2001 Location: Pacifica Posts: 248	1) Wrong thinking; DVDs and divx are both YUV compression formats. B&W would be redundant for RGB but due to the way YUV stores color it's not. I won't go into details but you can look for an explanation of YUV formats if you want to understand why. 2) Nandub has a problem with selecting range inside it for the first pass. As you said, it always does the whole source. To get around this you habe to create a separate d2v file with the portion you want, or if you're using Avisynth you can clip the portion you want in the script. __________________ rmatei http://dspguru.notrace.dk/rmatei.gif

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3rd January 2002, 20:03	#3 \| Link
LotionBoy Registered User Join Date: Oct 2001 Location: NYC Posts: 224	you can also just select what you don't want, delete those frames and do a first pass/2nd pass on what is left. LotionBoy

4th January 2002, 00:37	#4 \| Link
sibe Registered User Join Date: Dec 2001 Posts: 174	But keep in mind that if you do 1st/2nd pass only for a part of the movie the scene will look different than if you do the whole movie. To see what a scene will look like in a "real" encoding you have to do at least the first pass for the whole movie and then the second pass of your selected scene only. Sibe