This is actually good patch. It is possible to edit AVCHD in kdenlive.

But there is a little problem now.
Patched FFmpeg worked good only for kdenlive, I have no ability to play native AVCHD files with video player. New version of the FFmpeg have very good AVCHD playback support - VLC play's it nice. But now (with new version) it is impossible to edit AVCHD in kdenlive :(

Conclusion: it'll be very nice if we will have patch for newest version of FFmpeg