fastforward/bw mkv in wmc/playsped mkv in WMP

[evlo]

Hello,

i wonder why fast forward/backward in WMC(7, x64) work only with some mkv files and not with other, it is same when i use divx(8) or haali splitter.
I know it is probably because of different codec of video inside mkv (avc1 vs. x264), but i don't get why it don't work with x264.

[Guest]

What GOP size did you use to encode the MKVs?

[evlo]

Erm, how do i get it? :)

[Guest]

What did you select when you encoded the video?