Creating DVD's on CD/R disks

[Dropbear]

Hi!.

Instead of creating SVCD specked ISO's, would it be possible to create files that can be placed on CD/R disks, that the DVD player thinks are DVD files?

Ie: encode the DVD file down to 2Kbps, mux in the AC3 stream and then burn the files as DVD's instead of SVCD's?

Would a stand-alone DVD player play these files, or will it baulk at not having the full 6Kbps bitrates? Do you need DVD authoring software to make this kind of image?

I guess we've learnt that we can't put 5.1 audio streams into a SVCD and hope for them to be played on stand-alone players, but how about "mini DVD's????"

[Matthew]

Yes you need DVD authoring software. Personally I'd use dvd2svcd to make the video stream and mux it with the AC3 in dvdmaestro. You make it just like if you were authoring a DVD-R.

However, AFAIK there aren't that many players that support miniDVD. Plus to be DVD compliant you need to either use the original resolution, which means you gotta keep the bitrate high to avoid blockiness, or use half size (CVD). Half size is lower than SVCD resolution so its less crisp (although some people like it). I remember reading about how you can patch SVCD video streams to fool DVD authoring programs into accepting them, but that sounds a bit dodgy.

In regards to bitrate, well dvd players often don't read at high speeds off cd-r/rw (e.g. I can't go above 2500 max on my pioneer) so even if yours supports minidvd you might have to be careful with the max bitrate.

[Dropbear]

If I am going to be using 80min cd's then what size should I tell DVD2SVCD the size of the CD is then? I presume the AC3 sound track is going to be bigger than the mp2 one, so I need to leave room on the cd for the "bigger" muxed file right?

[Toffy]

Yes, you are right. The AC-3 sound needs 384 Kbps and that can be set as audio bitrate. The miniDVD must be burned as UDF/ISO-file format. Unfortunally, this format uses the error correction while SVCD does not for the film. The difference is 13%. Therefore you have set the value for a 80 min.700Mb disk to 700.

Toffy

[orbit-r]

hi
@matthews:when you making minidvd`s you can go to ~5000kbs (if youre player is minindvd compatibel) with no problems, cause for a minidvd the standalone uses the dvd-laser which can transport much more data then the cd laser which is used for svcd`s,vcd`s and so on...

@toffy:its possible to reencode the .ac3 sream with lower kbs (surley more work)


gruss
orbit-r:cool:

[Chetwood]

Originally posted by Dropbear

Instead of creating SVCD specked ISO's, would it be possible to create files that can be placed on CD/R disks, that the DVD player thinks are DVD files?


From all what I've read you can't simply because the DVD player - when recognizing the structure of a DVD - also expects a physical DVD medium and calibrates the laser to read from it. As the CDR has a different reflection it cannot be read. AFAIK this is with most standalone DVD players. You might wanna check groups.google.com on that...

[Toffy]

@orbit-r
Thanks for your info on AC-3.
Sorry, but I don´t know what you mean by a miniDVD. For me it is a CD-R with a DVD directory and file structure. And if these datas are on a CD then it will be played back as CD with the specs of a CD, i.e the max. bitrate of the CD-player (DVD-player). E.g. my standalone DVD-player ends slightly below 3 Mbps.

Toffy

[orbit-r]

me again
toffy a cd-r with file structure of a dvd is called mini dvd..
thats why its possible to put ac3 sound on it cause the dvd player thinks its an original dvd(when the standalone is compatible with playing mini dvd`s),and therefor as i said he uses the dvd-laser to read the disc and not the cd laser...this is the nice thing on mini dvd`s ...but the other thing is its very poor supportet by dvd-players...

gruss
orbit-r:)

[Toffy]

ok orbit-r,
next try. :D
I agree with you and that I have already done in my last post to the structure of a miniDVD and that it is a CD-R. But a CD-R is played back by the CD-player in the DVD-player with the laser of the CD-player and the datarate of a CD-player whatever information is on it.
And that is what causes the problems with the bitrate of miniDVDs. (Beside all other problems of miniDVDs)
I am sorry that I disagree with you in this point.
But I think this couldn´t be solved by discussion. ;)

Bis denn
Toffy