is a m2v a mpg file?

[pcexpress-guy]

if I see a m2v file, is this the same as a mpg file? What's the difference?

Thanks!!

[Meteor]

An m2v file is an mpeg2 file without audio. An mpg file usually has audio but there can be cases where they don't.

[pcexpress-guy]

thanks!

is this true...

is a m2v always MPEG2 without audio?

is a .mpg file be either mpeg1 or mpeg2, mostly with audio, but sometimes can be without audio track.

is this the deal?

[petar]

These are Windows extensions and unfortunately not all applications are uniformed regarding their use. Normally m2v is an elementary stream and mpg is a system stream. But then, CCE adds mpv to the elementary stream. Others add mp2 for mpeg2 elementary video stream whereas audio tools understand mp2 as mpeg1 layer 2 audio. If you're not sure it's best to open the file with some MPEG utility (like the MPEG tools built into TMPGEnc) and will tell you what it is.

[pcexpress-guy]

this may sound stupid, but why do they call a "system" file, one which has both audio & video streams (or more?) and an "elementary file" one which only has audio or video stream?

just curious.

thanks!