When will DVD's be improved upon?

CaTaClYsM · Post by **CaTaClYsM** » Thu Jan 16, 2003 10:19 pm

I wonder when that will be, because DVD's just don't cut it.

NicholasDWolfwood · Post by **NicholasDWolfwood** » Thu Jan 16, 2003 10:37 pm

CaTaClYsM wrote:
NicholasDWolfwood wrote:There's your problem. SVCD uses like a 2520kbps bitrate. 600kbps isn't going to confine by the SVCD spec, therefore not play.
umm, SVCD's and XVCD's can have variable bitrates. I made and XVCD with a bitrate of 2300 in MPEG 1 that played just fine on the DVD player in my other room, but hte one in the LIVING ROOM crapped out.

Umm...no. SVCDs have a bitrate of 2520kbps or somewhere around that. Dunno about XVCDs, as I've never used it before.

alternatefutures · Post by **alternatefutures** » Thu Jan 16, 2003 10:43 pm

According to www.vcdhelp.com S and X VCDs have a maximum of 2500kps and, from what it looks like, can have a variable bitrate.

RadicalEd0 · Post by **RadicalEd0** » Thu Jan 16, 2003 10:46 pm

omfg guys please, this is pathetic.

The DVD specs include; VBR Mpeg2 and Mpeg1 from 0kbps to 9000kbps (total stream cannot exceed 9mbps) frame rates of 23.976 progressive and 29.97 interlaced, and resolutions of 720x480, 704x480, 352x480, and 352x240.
ALL commercial DVDs use VBR Mpeg2 at 720x480 and 99% of which are 29.97 interlaced.
SVCD specs include VBR Mpeg2 at 29.97fps and 480x480 res. Bitrate between 0 and 2600 kbps. Total stream cannot exceed 2756 kbps.
VCD spec includes CBR Mpeg1 at 29.97 or 23.976fps, 352x240 res and a fixed bitrate of 1150 kbps (video), 1374kbps total.

All DVD players support DVD (no shit). Most players support VCD. Many support SVCD. Few support miniDVD or DVD video authored on a CD.
What jbone mentioned about CD read speed is correct, a lot of players (especially older ones) don't read past 1x. Similarly, a lot of players will fudge up under 300kbps and a few don't read under 1150kbps. Either way there's no golden rule or logical application that says a DVD player should or shouldn't be able to play something. Different formats that share only the same codec have no guarantee of being cross compatible.
You can check from the compatibility list on www.vcdhelp.com to see if your player is supposed to support SVCD.

Also, no DVDs contain Mpeg4 video. It isn't part of the spec and couldnt be played in modern players.

As for HDDVD, we've got awhile to wait, but the format is probably going to be based on 20-25gb per layer 400nm lazer discs using 1920x1080i and 1280x720p high definition video at 30mbps. I'd like to say they're using mpeg-4 for this task, but it would take probably > 3 ghz processor to decode 1920x1080 mpeg4 and they're not going to be putting those in standalone players. Maybe by the time they actually get around to releasing the format that won't be so far fetched, but it isnt in the plans.

Zarxrax · Post by **Zarxrax** » Thu Jan 16, 2003 10:51 pm

I'd like to say they're using mpeg-4 for this task, but it would take probably > 3 ghz processor to decode 1920x1080 mpeg4 and they're not going to be putting those in standalone players. Maybe by the time they actually get around to releasing the format that won't be so far fetched, but it isnt in the plans.

Note that it takes more processing power on a PC to play back MPEG-2 than it does MPEG-4.

RadicalEd0 · Post by **RadicalEd0** » Thu Jan 16, 2003 11:00 pm

at the same bitrate?

RadicalEd0 · Post by **RadicalEd0** » Thu Jan 16, 2003 11:01 pm

well have fun with it here, a whole debate about HDDVD and mpeg2 vs mpeg4
http://forum.doom9.org/showthread.php?s ... genumber=2

its like the 3rd post down that it really starts

jonmartensen · Post by **jonmartensen** » Thu Jan 16, 2003 11:31 pm

You're so smart Ed, we love you! 8)

CaTaClYsM · Post by **CaTaClYsM** » Thu Jan 16, 2003 11:50 pm

all I want is the vid to be put in a lossles codec, is that to much to ask.

btw, the gamecube can do divx bitrates up 20 4000 in what I would asume be the standard TV resolution.

CaTaClYsM · Post by **CaTaClYsM** » Thu Jan 16, 2003 11:51 pm

*up to, not up 20, damn me and my typo's.