HDV and DVD, maybe an idea.

farss wrote on 1/1/2005, 1:06 PM
This maybe a really dumb thought but here goes.
I've been working with a lot of 16:9 lately and that does use pretty well stretched pixels. Now with DV25 that's just the way it is so no point trying anything interesting.
However coming off HiRes stills or HDV things could be different. I'm thinking 16:9 with square pixels, 1049x576 in PAL. I can see no technical reason why a DVD player would not cope (specs not withstanding), it seems I can run Vegas that way. The DVD player just feeds analogue RGB or YUV to the TV so shouldn't be an issue there either. I don't know if DVDA will cope or not.
If no one can think of a reason why this wouldn't work I might give it a whirl.
I've got a DVD of footage off a HDW F900 and it still looks better than anything I can get off very high res stills or HDV, did the guy who authored it know something I (we) don't?
Bob.

Comments

farss wrote on 1/2/2005, 8:21 AM
Anyone, sorry for the bump but things that maybe of some real interest seem to be slipping.
Grazie wrote on 1/2/2005, 8:38 AM
Sorry Bob , . . I've been reading your great ideas, but being a dumb-ass limey - well I can't add . .I think I understnad . . but then I loose it again . . sorry PAL!

Grazie
Barry_Green wrote on 1/2/2005, 8:40 AM
Are you asking if it's possible to provide a non-standard signal to a television from a DVD player? Won't work. DVD players play back NTSC or PAL video streams, not raw RGB data. The data has to be encoded at specifically 720x480 or 720x576, 4:2:0 MPEG-2 in order for the DVD player to be able to play it. Nothing else will work.

A DVD-ROM with your own custom software and custom hardware, yes, that could do what you're asking. But commercially-available NTSC-compatible and PAL-compatible DVD players won't do what you're asking. Unless I've misunderstood what you're asking...
farss wrote on 1/2/2005, 9:08 AM
No, I;m trying to send a standard signal to the TV, the interconnect being analogue doesn't know about pixels, and the more horizontal line of resolution the better.
So my thinking is if the mpeg file is 1049x576 1.0 PAR the player should play out the SAME signal to the TV but with more horizontal res.
After all, my sources have 1.0 PAR and well over 1049 line of horizontal res. At the moment throughout the process resolution is being thrown away, pixels sqaushed and stretched etc. Hope this makes some sort of sense. Maybe I'll just try it and see, blank DVDs are pretty cheap! My only concern is it MIGHT work on my gear but have issues on others.
Bob.
<edit> OK, maybe I'm stupid, after all the TV is stretching the image! And technically I can get around 700 lines of res out of a DVD without fudging anything and I doubt the average TV would come even close to that, I'll still give it a go, you never know. Actually I could rip a short section of a commercial DVD and just see how they've done it.
Barry_Green wrote on 1/2/2005, 12:54 PM
I think I see what you're trying to do, but... I don't think it's gonna work. The DVD player is set up to recognize DVD-compliant MPEG-2 files, and those are going to be 720x480 or 720x576. Sending it a different size isn't likely to work.

But yes, you can certainly experiment and see... it would be *very* interesting if what you suppose is possible.