Is a low bitrate going to need a high birtate>DVD

[joesphroth]

I'm converting a divx file to dvd using cce sp 2.70 and i was wondering if a high bitrate is needed if the bitrate of the avi is only 1000kb/s. Will i lose quality if i set the bitrate to 1000 when i convert?

[kschang]

Two completely unrelated measurements, actually.

1000 kbps for AVI (using DIVX5? codec) when decompressed, will generate a lot more bits than 1000 kbps through MPEG2, IMHO.

If you're not going to put anything else on the DVD-R, you may as well use the space to maximize the bitrate, right?

[edDV]

Best to make a test DVD (same scene) with various 8, 7, 6, 5, 4, etc. Mbps bitrates and see where the quality falls off.

Divx at 1Mb/s will probably max in the 3-5 Mbps range for MPeg2.

Correction: I think you meant 1000 Kbps = 1Mbps DivX.

[jagabo]

Best to use a constant quality MPEG encoder. Then you don't have to worry about what bitrate is right for any particular source.

[joesphroth]

Best to make a test DVD (same scene) with various 8, 7, 6, 5, 4, etc. Mbps bitrates and see where the quality falls off.

Divx at 1000 Mb/s will probably max in the 3-5 Mbps range for MPeg2.

thanks a lot i'll try that. So you're saying that at over 3-5 Mbps will probaly nto make the video anybetter?
Also I have a couple of divx movies, all about same bitrate, do you think i could put them on 1 dvd without quality loss?

[edDV]

Best to make a test DVD (same scene) with various 8, 7, 6, 5, 4, etc. Mbps bitrates and see where the quality falls off.

Divx at 1Mb/s will probably max in the 3-5 Mbps range for MPeg2.

thanks a lot i'll try that. So you're saying that at over 3-5 Mbps will probaly nto make the video anybetter?
Also I have a couple of divx movies, all about same bitrate, do you think i could put them on 1 dvd without quality loss?

DivX is a high compression format. When you convert to Mpeg2, you will need higher bitrate for the same quality. The test is to see where the MPeg2 bitrate minimizes further quality loss. None of this improves quality.

1000 Kbps DivX is already fairly low quality. You would need 3-5 Mbps DivX to approach commercial DVD MPeg2 quality.