calculate video mpeg

videoguy wrote on 9/23/2003, 5:14 PM

Can someone tell me the formaula to calculate the video output of a mpeg 2 file. For example I have a 40 Gig file and when I render it out using the default DVD-NTSC template it comes out to be 5GB bigger than a cd. My question is how can I tell in the future approximatly what the output site will be. Is there a way so compute a formula. The movie in vegas is 2hours long. I am a little confused. By the way I know that can reduce the sound to ac3. So finally if someone can give me a general formula or a webpage that I can go to that would really help me out. Thnaks for all your help

Comments

johnmeyer wrote on 9/23/2003, 5:27 PM

First (not an answer to your question, but as background) if you render using the NTSC DV template (i.e., as DV video), your video will consume just under 14 Gbytes for each hour. This is a constant rate.

When you create MPEG-2 files for DVD, you can change how much disk space (or DVD space) the file will consume by changing the bitrate. The average bitrate setting (which you can find by clicking on "Custom" after you click on "Render As") determines how much space your video will take. There is a calculator, available online, that will help you with this computation. Click here:

Bitrate Calculator

videoguy wrote on 9/23/2003, 5:40 PM

In your first part do you mean capture from my camcorder. I am not sure what you mean. The rest is very good. One question I have is, what bit rate should I make my sound? Thanks for all your help. Very helpful

John_Cline wrote on 9/23/2003, 10:10 PM

Here is a link to a TERRIFIC MPEG2 bit rate calculator:

BitCalc v1.04

John

markrad wrote on 9/23/2003, 10:17 PM

Another excellent calculator can be found online at
http://dvd-hq.info/Calculator.html

Mark

johnmeyer wrote on 9/24/2003, 12:41 AM

In your first part do you mean capture from my camcorder. I am not sure what you mean.

What I said: "if you render using the NTSC DV template (i.e., as DV video), your video will consume just under 14 Gbytes for each hour. This is a constant rate."

It actually doesn't matter. DV video takes up 14 GBytes/hour, period. It takes up that much space on your DV tapes. It takes up that much bandwidth as it streams across the 1394 cable. As you capture, it takes up that much space on your hard disk. And finally, when you render the results of all your editing back to the hard disk using the Video For Windows AVI NTSC (or PAL) DV template, it takes 14 Gbytes/hour.

As for audio, if you render to MPEG-2 and use the standard "DVD NTSC" template (or "DVD PAL" template if you're in Europe), it will choose 224 Kbps for the audio. This is the correct rate to use.