Thanks for the feedback.
You are right about the variable bitrate, but the audio has the same problem. I was just wondering since someone came up with a stardard audio bitrate to calculate from, that the same could be done for video.
For instance, using a blank DVD-RAM in my Panasonic, the disk-info screen tells me I have 2 hours of video that I can record in Standard Play mode. If I change modes, it adjust the time accordingly.
Now, when I remove the DVD-RAM from the living room and place it in my PC (Samsung DVD recorder), it tells me I have 510 minutes. And if I have a 1-hour recording on it, the Panasonic tells me I have 1 hour of space left, while the Samsung under IB tells me I have 250 minutes of space left.
I was hoping that we could select a bitrate as a benchmark . . . say . . . a fixed bitrate that would allow a 2-hour recording on 1 single-sided DVD, and calculate video time from there.
It really isn't a big deal for me, I was just curious about how the "510" is being calculated, and what it actually represents.