Help with Bspayer video
 

For some reason when I play a .mkv video file it always plays upside down but fine with orther players like media classic. I can not figure out how to fix it I think that I might have changed something in the settings but I can not find out what.

By any chance do you use FFDShow ? (rightclick->options->filters when file is playing). If so, there is a function under misc. tab called flip video. Check or uncheck it.