Quote:
Originally Posted by delacroixp
I didn't find the 2-pass quality but ...
... I did find the CRF + 1 pass ... and gave it a go.
I don't really understand the concept but it did ... SET bitrate on the 2nd pass (gained from CRF 21 for an episode of Friends on the 1st pass) .......
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I think the idea was to do a CRF encode in pass1 which sets the "Quality" level. Just tell x264 to make a .stats file. Then do a second pass using the bitrate from pass 1.
The second pass will improve on the perceived quality by redistributing the bits (bandwidth) most efficiently.
I am not sure what the improvement would be compared to a lone CRF pass, as I have never tried this "Quality based 2-pass" method.