TMPGEnc Maximum File Size for Authoring?

[cym]

I'm trying to maximize my bitrate, to get a 2 hour video on a standard DVD at best quality. From reading the forums and FAQ here, I understand the max capacity of a standar DVD-R is 4,700,000,000 bytes.

Assume I use a video bitrate of 5,000,000 and an audio bitrate of 128,000, totalling 5,128,000 bits/s.

Therefore, for two hours...

(5,128,000 bits/s) * (7200 seconds) * (1 byte/8 bits) = 4,615,200,000 bytes

This is less than 4,700,000,000 capacity.

But for some reason, TMPGEnc indicates my total bit rate is 5220, which if you do the math, puts me over the maximum, and TMPGEnc indeed shows me as being over for a 4.7 GB DVD, requiring ~106% of the media.

Where are the extra 92 kbits/s coming from?

Bottom line is I'd like to be at 5 Mbits/s with the video, with no less than 128 kbits/s audio, and the math indicates to me that should be OK.

CYM

[thegeeman]

My suggestion would be to use a bitrate calculator, I use FitCD. Merely input length of video file and selected audio and it will calculate the max bitrate for you.

bits & bytes:-Although i do see your logic, there's a little more to it than what you are calculating. As mentioned, use a bitrate calculator.

[thegeeman]

Scrap that (its very early in the morning over here lol ). I use Videocalc. There are a few tools here https://www.videohelp.com/tools/sections/bitrate-calculators

[manono]

You neglected to figure in the muxing overhead. That's what bitrate calculators are for. And AC3 audio at 128 kbps is poor quality audio unless it's a mono track, or maybe unless it's all talking. And what's so magical about 5 Mbits/s? Do you believe it to be some sort of dividing line between poor quality and good quality video?