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Old 7th February 2008, 05:47   #1  |  Link
Vetal
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Join Date: Jul 2003
Posts: 28
Bits per pixel value for quality x264?

I'm using bit per pixel koeffitient to calculate target size or bitrate:

Size (kb) = W * H * Num_frames * k/ (8 * 1024)

Where W* H * N total number of pixels. k - bits per pixel

Bitrate (kbit/s) = W * H * fps * k / 1024

Which gives me clear quality-to-koeffitient dependency, independent from resolution or fps. I.e. for XVid I use k = 0.15-0.4 bit per pixel for h263 quantization, 0.5 for MPEG quantiztion.
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Based on that, what k (bits per pixel) should be for x264?

From what I've got, for 1920x1080 used 10000kbit/s,
k = 0.16-0.17. Could you express your feeling about good x264 hiqh quality rip. What k are you using?

Just want to put it to my Excel. I don't feel like using 1000 kbit/s from profiles for different resolution is a good thing

Thank you!
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