Dvd to .mkv questions

I can't download you sample as my already slow internet connection is running like a dog at the moment. I live in PAL land so I'm not really good with NTSC anyway. However a couple of thoughts..... VTS_07_0.VOB is only 55 seconds long. Are you sure it's part of the main title? The AVC levels enforce certain encoder restrictions. I use Level 4.1 for everything these days as most newer devices support it. Some older devices don't of course. Standalone players generally support the same level regardless of the video's resolution. Some of the encoder restrictions do change according to the resolution but they're automatically enforced by using a particular AVC level so there's generally no need to change the AVC level according to resolution. You will be able to play video encoded using level 5.1 on a PC but chances are you won't be able to use hardware decoding (assuming your video card supports it) and most standalone devices such as MKV capable Bluray players, TVs with built in media players, and even many newer portable devices support a maximum level of 4.1. I wouldn't use anything higher unless you don't care about standalone device compatibility.

Forget the VTS_07_0.VOB file it's not part of the main title. It was my fault to include it... however, my confusion about different framerates in the other .vob files still remains... Thanks hello_hello for your answer about the different AVC Levels. Could somebody answer to my other questions?

Still no-one???