Mixed MPEG2 Output Required

[Walter Soyka]

[Wayne Beckwith] “I have a customer specifying the following video format requirement to play via a CF card in their media player as it does not accept any other format. I am having trouble finding a way/software that outputs a mixed mpeg2 format.”

Perhaps the client made a typo when specifying a muxed MPEG2 file? I’d suspect an MPEG2 program stream would work, but perhaps you could find out more about the playback device to look up its input requirements?

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events

[Jeremy Garchow]

Perhaps they mean muxed?

Muxed means the audio is in the same file as video,
as opposed to two separate files.

Compressor does this, but it’s called a transport stream.

[Walter Soyka]

[Jeremy Garchow] “Compressor does this, but it’s called a transport stream.”

Great point, Jeremy. The deliverable might either a program stream as I originally suggested, or a transport stream as you have mentioned — both are muxed.

That’s probably the best question to go back to the client with if you cannot get any more information on the playback device — do they require a program stream or a transport stream?

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events

[Jeremy Garchow]

I bet either program or transport will do, as long as data rate is high enough.

Sorry,Walter, didn’t see your post before I posted. Sorry to duplicate.

[Wayne Beckwith]

Thanks everyone. I have emailed the client to check 100% the output, but suspect the combined MPEG2 file will be what they are after in which case I will give the Transportation format a try

Regards, Wayne

[Rafael Amador]

[Jeremy Garchow] “Perhaps they mean muxed?

Muxed means the audio is in the same file as video,
as opposed to two separate files.

Compressor does this, but it’s called a transport stream.”
The MPEG-2 muxed with MP2 audio exist far before the terms Transport Stream and Program Streams appeared and they had brought a bit of confusion.
Muxed in facts means only one file. This is possible in MPEG, when picture and audio (MP2) are both MPEG. We end up with a unique MPG file with video and audio wrote in different layers.
When we are packing together two different formats (ie. m2v that is MPG and AC3 that is not) we can not talk about “muxing”. in this case the two files are just wrapped together keeping their original nature and attributes.
rafael

rafael

http://www.nagavideo.com

[Jeremy Garchow]

[Rafael Amador] “Muxed in facts means only one file. This is possible in MPEG, when picture and audio (MP2) are both MPEG. “

I’m not talking about packing two files together, I am talking about making a multiplexed (muxed) file. And I forgot, Compressor can do either a program or transport. I’d use the generic profile as pictured.

Wayne, what it won’t let you do is the off frame size they are asking for. Are you sure that’s correct?

Episode can be an alternative software to use as well.

Jeremy

[Wayne Beckwith]

Thanks Jeremy, yes all the file format requirements were correct, and yes I discovered that it won’t allow for a different frame rate so I left it at 25fps/PAL. I suspect their tech guy is being a bit pedantic about it all?

Regards, Wayne

[Jeremy Garchow]

[Wayne Beckwith] ” suspect their tech guy is being a bit pedantic about it all? “

Well, sometimes you need to be with video standards or it just doesn’t work There’s definitely some odd things going on with that file format that don’t quite add up in my mind, but I don’t know about every single proprietary playback system out there, and sometimes they are just plain weird (it’s what makes them proprietary). I guess if it doesn’t work for them, they’ll tell you.

Jeremy

[Rafael Amador]

Yeah Jeremy.
[Jeremy Garchow] “Compressor does this, but it’s called a transport stream.”
What I mean is that a muxed MPEG-2 is not the same than a Transport Stream.
In a TS, the audio don’t necessarily be MP2, while in a “muxed ” MPEG-2, the audio can only be MP2.
As ou can see in the exports options of MPGStreamclip, you have Transport Stream, and MPEG-2 with MP2 audio. This last is the one we can call muxed (multiplexed).
rafael

http://www.nagavideo.com