Hybrid SD/HD DVDs.

[Big Vern]

Been wondering this for a while now. Is it possible to encode a blu-ray down to say a DVD9 as a normal DVD, but with a AR of 1280x720 or 1920x1080?
So when it plays on a normal DVD player, it displays as SD via a SCART lead, and when it plays on a blu-ray player via HMDI, it displays as 720 or 1080.
It would obviously have to be encoded as 720 or 1080 to get the HD signal, and I know a SCART would only display a SD signal, are these DVDs possible? If so, what tools are required?

I know its sounds like anidiot question, but was just wondering if they can be done?

Regards.........

[laserfan]

You said "a AR of 1280x720 or 1920x1080" where presumably you meant "resolution"--these resolutions, even on a DVD disc, are not to DVD spec therefore will never play on a DVD player--they won't be recognized as a DVD video disc.

[yetanotherid]

The combo discs being sold now have a BluRay layer and a DVD layer so they'll play in either player, but I don't think anyone makes blank combo discs.

Maybe the closest you could get would be to convert the video twice, once to MKV/HD and once to AVI/Xvid (for example) making sure between them they still fit on a single disc. Then any MKV capable BluRay player and any DivX capable DVD player should be able to play the appropriate file.

Might be just as easy to use two discs though, and I doubt there's a way around encoding the video twice. I wish there was.... I convert MKVs to AVIs fairly regular for other people in this house. Oh well... at least I've finally got them off DVD9 discs and moved up to AVIs. ;)

[Ghitulescu]

Supposingly it would work, there's only one solution to this.

Create a DVD and a BDMV. Burn the first session as UDF1.02 that contains the VIDEO_TS and a second session as UDF2.50+ that contains the BDMV files. One can even combine them into one session, with two FS descriptors that contain different filesets, but this is extremely hard to manage, and definitively not possible with normal software (like Nero). Then burn the image.
Normally, the DVD player would recognise the DVD part, but the BD players might have problems in picking up the right format (DVD or BD).

Never though of trying it as it is useless, unless one has say 10 minutes of video from eg a HD camcorder. Otherwise the video won't fit the DVD.