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Old 5th January 2005, 20:38   #35  |  Link
akupenguin
x264 developer
 
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Join Date: Sep 2004
Posts: 2,392
Quote:
Originally posted by JoeBGermany
Oh yes, some functions need some tips for me:
2) Codec
a. 2 pass, first pass:
a1) Quantizer: 0 is highest quality? I want to encode 1/3 DVD.
0 is highest quality (similar bitrate to huffyuv, though it depends on the amount of motion). I find h264 @ qp=18 to be similar to mpeg4asp @ qp=2, and h264 @ qp=24 to be similar to mpeg4asp @ qp=4.
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a3) Number of reference frames: 3 -5 ?
more is always slightly better, but if you care at all about speed, 3-5 is good.
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a4) Number of b-frames: 2-3 would be
No. We don't have adaptive B-frames yet, so don't use more than 1.
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a5) I want to use somethimg like adaptive. Is -2 for both ok?
is this deblocking? yes, -2 is ok.
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a7) subpixel refinements: Always QPel brings highest quality?
Always QPel is the highest quality, but is only needed on the final encode. For the 1st pass you can set it to medium with negligible loss.
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a8) Macroblock options: Both for highest quality? b8*8mv and 4*4mv?
yes.

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b. 2 pass, second pass
Bitrate: Bitrate for a 1/3 DVD Rip? From a calculation tool?
You can set bitrate to whatever you want. That part of encoding hasn't suddenly changed with h264.

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3) Quant & RC
Buffer Size = Bitrate and I should activate "fix" ?
Don't touch buffer size unless you know what you're doing.
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