TMPGENC Xpress VS Plus File Sizes....

[drfaustmd]

Hello, I've been using TMPGENC Plus 2.5 for a few years now, but recently I decided to upgrade to Xpress 4.0, but I seem to be having a bit of a problem. When I used to use the standard NTSC template for 2.5 the file size for a 90 minute movie would typically be about 1.5gb - 1.7gb and the bitrate would be 8000KB/S. Well when I use the Xpress on the same 90 minute file it is usually 4gb and when I set it to 8000KB/s it goes way over 4gb, am I doing something wrong? The files don't really look any different (at least to me) but I would like to get the highest quality possible, is there really a big difference quality wise between 2.5 and xpress 4.0? Am I just encoding it wrong and thats why the file sizes are so big? Any help is appreciated, thanks!

[guns1inger]

The bitrate wasn't 8000kbps in the old days. It could not have been. To fit a 90 minute movie on a DVD, with 20 MB for menus and overhead, allows a maximum bitrate of 6570 kbps, if you use 192 kbps audio. To get the size down to around 1.5GB you are looking at the low 2000 kbps range, which is very low for full D1.

So somewhere along the way you have got your numbers way out of whack.

[drfaustmd]

yeah I probably did, when I put the mpg through gspot it says its 8000, but it's probably reading it wrong

[guns1inger]

I'm betting it's an older version of g-spot, and is just reading the bitrate in the header. Update to the current version (2.70+) and it will scan the stream and get a much more accurate bitrate based on the actual encoding, not what the encoder wrote in the header.

FWIW, an SD digital stream I grabbed off FTA the other night has 15000 in the header as the bitrate, but is in fact 5400 and wavers only a couple (literally) of kbps either side of that. Headers lie : data doesn't.