2520kbps is there really a need to go higher in a SVCD ??

[Draven]

Is there a meaning in using more cd's for a movie just for the sake of better performance ?? I mean that you could use 3 cd's for a movie that is 2 hours long when you use 2520kbps in video and 224kbps in audio....If you have a dvd player that supports higher bitrate can you se a difference if you go upp to 4000 in VBR 2pass mode and use 4cd's, is it worth the effort i mean???

[SingSing]

I think the pratical limit of CD per movie is 3.
Too short playing time per CD, normal make
the viewer lost interest and feel discontinous.

4 CD = 4 x 800mB approx = 1 DVDR disc.

[adam]

For just about any movie there will be a number of scenes that would benefit from a max bitrate above ~2600kbits. And of course just raising the max bitrate doesnt really do much unless you also raise your avg bitrate, so yes raising your bitrate and spreading your movie over an extra disk will have a noticable increase in quality in most cases.

Once your avg starts approaching 3mbits then you are coming very close to the bits per pixel ratio of your source so there really isn't any benefit using a higher bitrate unless you also increase the resolution.

If your svcds are compliant than you will almost never even be able to use 4 cdrs. If you do choose to make an xsvcd, then there is no point to using 4 cdrs unless you use a very high max bitrate and encode in VBR.

Whether or not that extra cdr is worth the extra amount of quality is up to you. Personally I think it is overkill, but then again I think compliance is the most important thing so more than 3 cdrs is out of the question anyway.

[Draven]

Thanks Adam.
And when i got your attention,do you think we can make SVCD's or XSVCD's with DTS audio in a near future ...?

[adam]

Well SVCD's definitely not. The standard is pretty much set in stone and even if they did come out with an updated version, there is no way they would implement DTS or Dolby Digital 5.1 because any existing player wouldn't be able to play it, only new ones. See the standard comes first, then the hardware that supports it. With dvd recordable drives so cheap I seriously doubt they would invest millions of dollars to reinvent SVCD. Besides that, SVCD already supports multichannel surround sound and there is already an incredible lack of hardware support to the point where it is just about obsolete.

As far as xvcds, the only way to get DTS or DD is to multiplex the video track with the original AC3 stream off the dvd. Needless to say there are almost no dvd players that can properly play these back.

With SVCDS you are pretty much stuck with stereo which can be played back in dolby surround, prologic, or prologic II.

[Draven]

Hmmm.. Sorry to hear that Adam.
I have a pretty expensive audio equipment, and my audio reciever don't support mpegmultichannel.....