Mac -> PC !! What CODEC?

[Popoi]

MPEG 2 Part 2

I'm refering to ISO/IEC 13818 2:2000. Which is MPEG-2 Part 2 (Video).

It seemed edDV was trying to pin me when he was talking about codec/standard differences, so i said part 2 to make sure we're talking about compression and level/profiles here.

post-processing

Ok, gotcha.

standardized "Known Good" sample file.

Got any links for such files? are there any standardized?


edDV
Yes you are correct, i want to support MPEG 2 (part 2) Main Profile, Main Level. plus additional restrictions imposed on DVD (such as framerate, audio, aspect ratio, etc.)

With that in mind, i have a question for you: Can a maker of an MPEG2 codec decide only to support Simple Profile but still call it an MPEG2 codec even though it won't support interlacing for instance?


---

I'm still a bit confused why one codec would make a file play completely different than another if they are following a standard. Naturally, you can't control every codec maker to perfectly adhere to the standard, unless there's some "Certified" codecs by MPEG. Are there? [b]Edit]/b] Since MPEG only standardize the bitstream and its interpretation, then the end result could be QUITE different between codecs? no?

Thanks again all, you guys rock.

[edDV]

edDV
Yes you are correct, i want to support MPEG 2 (part 2) Main Profile, Main Level. plus additional restrictions imposed on DVD (such as framerate, audio, aspect ratio, etc.)

With that in mind, i have a question for you: Can a maker of an MPEG2 codec decide only to support Simple Profile but still call it an MPEG2 codec even though it won't support interlacing for instance?

MPeg2 Decoder not codec.

It all depends on what you are doing in your applcation. I don't understand your application. If you control the input (e.g. Video Games) then you can restrict supported video or audio formats. Read your licensing terms.

If you call it a MPeg2 player then you need to support all formats in order to fullfill the MPeg2 standard requirements and quite probably the license. I haven't been envolved with writing a MPeg2 DVD player so I don't know.

I'm still a bit confused why one codec would make a file play completely different than another if they are following a standard. Naturally, you can't control every codec maker to perfectly adhere to the standard, unless there's some "Certified" codecs by MPEG. Are there?

All I can say is you are observing different ways that software DECODERs fail when hardware isn't sufficient or if sufficient, is not being used optimally.

[lordsmurf]

edDV, why are you being so abrasive? If i'm failing to see the "big picture" then please by all means school me - this is a forum for idea and knowledge exchange not for arrogance.

I take offense at this. edDV went out of his way to try and help. This is not a free school online. It's a site of people helping people. Trading tips, tricks, technique, and general information. You still have to help yourself and do LOTS of reading. Your best bet would be to pay somebody to come in an assist on this project.

[Popoi]

I take offense at this. This is not a free school online. It's a site of people helping people. Trading tips, tricks, technique, and general information. .

Eh? if you say it's a site of people helping people trading tips tricks and general information... but i'm not allowed to learn... i fail to understand your logic. And don't worry i actually manage to learn from other sources than you. So save your offense to something worthy.

I'm glad you're able to learn from reading and asking questions, but i don't understand why i'm not allowed to ask questions if you are? You baffle me. I'm not looking for you or anyone here to solve my problems by giving a precanned solve-all answer as you seem to imply.

My question was simple: What's the middle ground for encoding-decoding between Mac and PC. It was elegantly and effectively answered by Cornucopia.

My Problem is solved. Thread closed, go back under the bridge.

thanks all who provided with insight and knowledge (i'll promise to forget it so smurflord won't be offended)

[lordsmurf]

There isn't a middle ground. Your questions come across as non-sense. All of the posts to date have tried to explain this very fact.

MPEG-2 is MPEG-2. I work with both Mac and PC. There are only a few decoders out there, software and hardware. It doesn't matter if you have Mac, PC .... whatever ..... it'll look relatively the same.

[edDV]

You can lead them to water ...
but you can't make them say "decoder"

[Popoi]

There isn't a middle ground. Your questions come across as non-sense. All of the posts to date have tried to explain this very fact.

MPEG-2 is MPEG-2. I work with both Mac and PC. There are only a few decoders out there, software and hardware. It doesn't matter if you have Mac, PC .... whatever ..... it'll look relatively the same.

right.

only in my case, it didn't! The ad company were happy with the files they sent, but when played on my desktop computer AND the target machine they behaved strange.

[lordsmurf]

Then it means your computers have problems.

[jimmalenko]

https://www.videohelp.com/forum/viewtopic.php?p=1396325#1396325

This is not a free school online. It's a site of people helping people. Trading tips, tricks, technique, and general information. You still have to help yourself and do LOTS of reading. Your best bet would be to pay somebody to come in an assist on this project.

Way to pour petrol all over the embers, then throw away the petrol can, staring innocently up at the sky whilst whistling dixie

[lordsmurf]

My Problem is solved. Thread closed

Indeed.