[MPlayer-dev-eng] [PATCH] x264 fast first pass

[Robert Swain]

Hello all,

After a request was made I have written a small patch that adds a fast first 
pass feature to x264 in mencoder. The VFW version of x264 has been using a 
conservative fast first pass for a long while and I have tested a second set 
of reduced complexity settings myself which seem to give good results. As 
such specifying fastfirstpass=<0-2> in the x264encopts allows for the 
following settings:

0 - disabled (same as omission)
1 - reduced settings in the same fashion as the VFW fast first pass (number 
of references, subq and reduction of subpartition types; cf the patch or 
x264 source for further details)
2 - reduced settings ( frame_ref = 1, subq = 1, no sub-partitions, no 
8x8dct, and diamond ME search)

I also tried to update the documentation but I'm unfamiliar with the 
notation used for the man pages.

Please find the patch attached. I'm new to programming but I think this 
patch should be OK. I had to move the multi-pass switch below the options so 
that it would overwrite them as necessary. Comments welcome, I need to learn 
good techniques. :)

Regards,
Robert Swain 
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