Features you don't want!

[JER]

I came to this products as I wanted to be able to turn MPEGS from UK digital TV broadcasts into dvd's with the minimum of processing. One problem with many video editors is a strict adhearence to DVD limits which aren't used by tv broadcasts, thus forcing time consuming re-rendering. I've found that digital Tv mpegs turned into DVD's will play on my toshiba despite having a max variable rate of 15000!

So if MPEG compliance checking is ever added please don't make it mandatory. Tmpegenc DVD author only gives you a warning but allows you to progress and that would suite me fine.

[DanR]

So if MPEG compliance checking is ever added please don't make it mandatory.There is a check for certain MPEG compliances when the encoder is called. If I remember correctly it checks that the max image size and bitrates are suitable for the file's MPEG2 profile (usually Main). There is an option in Builds 213+ on the Tools>Options>Advanced Stream to relax these checks, so you should be OK.

[JER]

So if MPEG compliance checking is ever added please don't make it mandatory.There is a check for certain MPEG compliances when the encoder is called. If I remember correctly it checks that the max image size and bitrates are suitable for the file's MPEG2 profile (usually Main). There is an option in Builds 213+ on the Tools>Options>Advanced Stream to relax these checks, so you should be OK.

So someone has asked for a complience check? Does this check compliance with the MPEG spec or the more stricter dvd-video spec?

If you create your own MPEGS using capture software then you can make sure you keep to stricter dvd-video standards to avoid re-rendering. The problems comes with "digital video broadcast" and digital TV cards which dump the unprocessed MPEG stream to disk. These mpegs often exceed dvd-video limits yet I've found that I can make DVD-videos with them without re-rendering which play quite happily. Obviously I can only do this using software which will ignore dvd-video limits, hence my concern!


P.S. I wonder if the reason for broadcasting with a Max Variable rate of 15000 is to cuase problems for copying. One wonders if it's only the descriptor data saying 150000 when the mpegs themsleves never get higher than 8000, as the files themselves are never large at about 1-2gb an hour.

[DanR]

So someone has asked for a complience check? Does this check compliance with the MPEG spec or the more stricter dvd-video spec? Just the opposite, VideoReDo has an MPEG2 compliance check. The frame encoder in VideoReDo does some MPEG2 (NOT DVD) compliance checks. A couple of users had recorded material at bit rates that were outside of the MPEG2 main profile. The encoder choked on it and wouldn't let them edit. The relaxed compliancy option simply removes the these checks. VideoReDo does not check for DVD compliancy. If I did that, half of the people using the product wouldn't be able to use the product. I have one user who as GOPs that average 36 frames! The DVD spec maximum is 18 frames/GOP.

You are correct about the DVB bitstream. The header is marked at 15Mbps, but most of the material I've seen is under 6MB.