Hey guys, I have this huge 4 hour MKV video with over 8GB of size. I need to crop it in different bits. However, QuickTime won't open it. Neither will Final Cut pro X, Premiere CS5 nor iMovie. I've tried converting it to MP4, MOV, AVI and many other file formats but every time I do so, by the end of the video the audio starts to get out of sync. So I'm really running out of options here. How can I crop this bloody huge MKV file? Can anyone help? Thank you in advance.