DVD Lab no good for demultiplexing?

[jnojr]

I demuxed a couple of .mpg files with DVD-Lab. When it was done, I got an error:

Cause: Bad header or unknown error
This file doesn't seem to be MPEG audio
Check if it is not a wrongly named ac3...

Searching for an answer led me to a post that said "Use TMPGEnc". I was able to use TMPGEnc to get my two files, but... why? Why can't DVD-Lab demux properly?

[Dimmer]

Scenarist for example can't demux at all. This is not a job for an authoring program. The source material must be prepared as elementary streams before authoring.

[jnojr]

But DVD-Lab *does* claim to be able to demux... if it couldn't, why would it have the option?

[Dimmer]

There is a lot of claims commercial companies make in order to increase the sales (not specifically DVD-lab). Sometimes the advertised functionality no as good as consumers would expect.

But at least you found the practical advice: use TMPGEnc.

[mudda_t]

But DVD-Lab *does* claim to be able to demux... if it couldn't, why would it have the option?
9 out of 10 times it will, sometimes you'll run across this problem.
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It's usually the sign of a bad mpeg or bad encoding.
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I like to think it's a warning of things to come.
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Use tmpgenc or mpeg-vcr.:D

[maa]

Or better - demux with PVAstrumento as it gives a report on dropped frames etc.