Any point converting a 1000kbps AVI to an 8000kbps MPEG?

[bazzzzzzzzz]

If an AVI has a bit rate of say 1000 is there any point of converting it to DVD with the bit rate of 8000? I've never had an AVI with a bit rate much over 1000 and using TMPGENC I see the Low Resolution DVD bit rate is 1150, or is an AVI better quality than an MPEG with the same bitrate?
know nothing grateful if anyone could clear that up for me

[mats.hogberg]

Rule of thumb is to use ~4 times AVI bitrate when encoding as DVD mpg, if the AVI is DivX or XviD.
1150 kbps DVD=VCD quality, something not many are satisfied with these days.

/Mats

[jman98]

This is a very good question. Well, it depends on the codec, but if you are talking about Divx/Xvid, then yes, the AVI will be better quality at the same bit rate than MPEG. If you converted the AVI to DVD with a bit rate of 8000, you would have very very little quality loss. Any conversion from one lossy codec to another will lower quality, but at that high a bit rate for MPEG, you shouldn't notice any difference between the two. If you have a good reason for converting to DVD, say maybe your DVD player won't play AVI, then I'd say using such a high bit rate makes sense if you want to preserve as much quality as possible from the AVI source. At that high a bit rate, you'll only have room for about 60 minutes or so of video on a single layer DVD disc, so if the video is longer than that, you'll need to either use VBR instead of CBR (my calculations are based on CBR by the way) or a lower bit rate.

[bazzzzzzzzz]

Thankyou both for your answers, yes it's XVID mostly, sometimes DIVX, I'll use a higher bitrate in future, I've converted short animations for VCD but changed to Low Res DVD after I was told it's basically the same (my computer's old and found the quality good enough for me)
thanks for that

[jagabo]

My rule of thumb for converting Divx/Xvid files to MPEG2 with TMPGENC Plus is to use "Constant Quality (CQ)" encoding. Set quality to ~85, encode.