For whatever reason, mediainfo gives the framecount for the video in a .mkv file, but not for the raw .264. I use Windows, so "mplayer -v file.avi -nosound -frames 0 | grep -i frames" isn't going to work. The command "mplayer -vo null -benchmark -nosound input.avi" DOES work, but it takes forever. How can I get a quick framecount, preferably via commandline?