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View Full Version : x264 AltiVec speedup


soresu
16th April 2006, 21:46
Does this new revision in 499 only matter to mac (ibm) users because it uses the AltiVec instruction set?

ChronoCross
17th April 2006, 02:27
yes it only matters to non-intel mac users.

peteag
18th April 2006, 10:55
does -fastf the same job as the turbo-mode on windows? with the new 2 options (fastf and mcpu=G5) I get nearly 25fps on a 720x288 clip in high-profile!!!! any other hidden options?

YayKitties
18th April 2006, 19:24
does -fastf the same job as the turbo-mode on windows? with the new 2 options (fastf and mcpu=G5) I get nearly 25fps on a 720x288 clip in high-profile!!!! any other hidden options?

-fastf is an option for GCC (Apple only) that enables the most aggressive otpmizations for compliation except for -malign-natural

You can get a slight speedup by replacing -fastf with -fast wich does enable -malign-natural but at the risk of breaking some binaries when linked with C++.