Difference between .m4v (H264 BD) and .mpg (H264 BD)

[guada2]

Hello everyone,

I have a strange question:
what is the difference between these 2 extensions.

Extension 1: .m4v
Extension 2: .mpg

I specify that extension1 is : H264 Bluray from Mainconcept encoder / Adobe media encoder (Adobe Premiere pro CS3): and, extension 2 : H264 AVC PRO/BlurayHD (Mainconcept Reference encoder).

Why Adobe Pro uses this extension? What are the advantages and the disadvantages?
what is the player able to play this extension without problem?
MPC, PowerDVD 7 =0 whereas Adobe Premiere pro CS3: OK

To finish, another information:
Bitrates are very high 35 Mbit/s

:thanks:

[Manao]

m4v usually refers to the mpeg4 elementary stream, ie the video without any encoder. It shouldn't contain any audio, so it isn't meant to be played, only to be muxed later on.

mpg refers to a multimedia stream inside a mpeg ps container. It can contain almost anything multimedia related, from video to audio & subtitles.

[guada2]

Thank you for this clarification.
It is true Manao.

But, i tried to play this file .m4v make with Adobe, no player could play it.
It is really strange.....Only Adobe is able to play it in previsualisation.
It is not practical and not very pleasant.
.
but, could you explain me why also one uses the extension .h264 and the .m4v for the same codec.

For example
Adobe Premiere Pro CS3 + Codec MainconceptH264 H264/Bluray HD = .m4v
and
Mainconcept Reference + Codec MainconceptH264 H264AVC Pro/Bluray HD = .h264

Thank you very much.

[guada2]

Sorry, Manao you are right :)

.m4v+ (Lpcm or ac3) MUX by Ts = .m2t :Adobe PP CS3

and

.h264 + (mpa, Lpcm) or ac3 = .h264,mpa or .h264,ac3
.mpg + (mpa, lpcm) or ac3 Mux by TS or PS = .mpg

Mainconcept Reference.

Many thanks Manao.
Bye.