Absolutely no idea where to post this on AVF so thought I would post it here.. What does MP4, MKV, H-264 (or x264??), Anamorphic etc all mean. (Actually I know what MP4 is and i'm sure MKV is just another file format similar to MP4 but no idea about the rest). An example: I was looking at downloading (legally) a file that had been converted to play on my PC that was originally on DVD. I go so confused with the acronyms I gave up... Here is an example of what I mean: container: .m4v/MPEG-4 anamorphic: 716x358 -> 848x358 AVC video: x264 @ 1850 kbps AAC audio: faac @ 160 kbps Help! Thanks, Chris.