How do you determine the encoding bitrate converting from Xvid to DVD?

[parkay2]

I think I've been doing this the LONG way. Anyhow, I take an XVID video, transcode it to DVD overnight, shrink it to fit to one DVD-5 Disk. Start the DVD in PowerDVD and check the bitrate. Then, I start over again with the original Xvid, write my AviSynth Script and encode w/ TMPEGenc using the bitrate that I garnished from my first dry run by transcoding and shrinking. Is there an accurate simple calculator where you can determine the bitrate so that when you start to convert an Xvid to DVD that you use all the DVD disk. Thanks in advance...

P.S. Thank goodness for sleep! I do my best video work when I am asleep

[redwudz]

Unless those are very high quality Xvids, such a HD, that all seems a waste of time. There is only so much bitrate needed to get equivalent quality to the original. I just toss them into ConvertXToDVD and let them come out whatever size it decides. Usually a 700MB Xvid ends up at about 1.5 to 3GB, depending on the length. More bitrate won't make it any better. You could test the quality settings with a sample 10 minute encode of a representative clip. Try different bitrates and settings and check them against each other.

But there are several bitrate calculators in our 'Tools' to the left that are fairly accurate on setting size and bitrate of a MPEG-2 encode.

[jagabo]

Is there an accurate simple calculator where you can determine the bitrate so that when you start to convert an Xvid to DVD that you use all the DVD disk.

file size = bitrate * running time

If you want to fill a DVD with one video use a bitrate calculator:

https://www.videohelp.com/tools?s=1#1

[mats.hogberg]

Rule of thumb: When going from XviD/DivX to DVD mpg, use 3-4 times AVI bitrate to do your source material full justice.

/Mats