Finished Quality

[reyna12]

Putting an SVCD and XVID movie on a dvd, both movies are 2 cds

2885mb in total

When i get the finished dvd files, the picture on both its pixely, blocked.

Although would easily fit on a dvd, the size is 4.5 gb final, so howcome theres a loss of picture quality on top of the pixelled, blocked images

[ChrissyBoy]

no idea, can you post the log so i can see what is going on?

[reyna12]

Attatched

svcd2dvdlog.txt

[ChrissyBoy]

ok. The svcd should not be pixelated as it has not been reencoded. The avi has been reencoded but at a low bitrate due to the overall duration of your source files.

You really need to put each movie on a seperate DVD to remove the pixalation as you are attempting to put nearly 3 1/2 hours on to a DVD which means poor quality.

[reyna12]

2885mb is the total size, it has an added 2gb when going to dvd, why would quality decrease ?

[ChrissyBoy]

because you are putting 3 1/2 hours of video on to a 4.37GB disk.... The size of your source is irrelavent.

omitting audio etc:
4.37GB /3.5 hours gives a bitrate of less than 3000kbs which is sub standard for a DVD. Do the avi movie on its own and you will see what i mean.

[jagabo]

2885mb is the total size, it has an added 2gb when going to dvd, why would quality decrease ? :(

Because MPEG4 (Xvid) is better at compressing than MPEG2 (DVD).

[reyna12]

What length are we ideally looking at for a dvd then? 2 and a half hours?

[jagabo]

What length are we ideally looking at for a dvd then? 2 and a half hours?

Single layer DVD:

High quality source to high quality DVD -- 1 hour.

High quality source to ok quality DVD -- 2 hours.

Anything else -- depends on source.

And what you can tolerate...

[kasimir]

I put sometimes a bit more as 4 hours an one singele layer DVD (two movies SVCD = 6 CDs) and i can not see that the quality is going down. The quality is the same as the source.

[CBC]

Yes, because w/ SVCD S2D is not having to re-encode, it just adds the NAV packs needed to conform it to DVD standard for playback. If you were to try the same thing using .avi sourcefiles, you would notice the huge hit in quality squeezing all of that onto one disc would cause, due to S2D re-encoding at a low enough bitrate to fit it all.