Interlaced vs. Progressive - Newbie Question

[joe355]

When creating DVD compatible MPEGs(PAL), most encoders say that the standard is 720x576 25fps interlaced(Field Order A). Will an MPEG with same resolution 25fps progressive still be DVD compatible? If so, will the quality of the DVD be poor if viewed on a TV?

[manono]

Hey Joe, and welcome to the forum.

most encoders say that the standard is 720x576 25fps interlaced

They do? That's news to me. As far as I know, never having seen a PAL DVD in my life, they're mostly progressive, at least the good ones are. If you're viewing over a standard Interlaced TV Set, I don't think it matters much whether it's progressive or interlaced. It definitely does matter when watching over a progressive display, such as a monitor, DLP or LCD HDTV, projector, etc. And interlaced encoding requires a much higher bitrate for the same quality. I say go progressive if you can. If your source, such as a video camera, is interlaced, it may be better to keep it that way, though. But others may have other opinions. And I may be completely wrong.

But 25fps progressive is definitely DVD compatible.

What say you oddyseus or killingspree (or others)?

[Kast]

Originally posted by manono
never having seen a PAL DVD in my life

That's the key phrase of your whole post. The lamers here in europe aren't doing such a good work. I'm encoding the newest movie i bought (Bent it like Beckham) and it's interlaced.

[Zhnujm]

Maybe its encoded interlaced but the movie is surely not interlaced.

[manono]

Hi-

Yeah, Zhnujm's right. A major movie like that can't be interlaced. On what are you basing that claim? DVD2AVI? It lies. If you open the .d2v in something like GKnot, you shouldn't see any interlacing. And even if you do, put on Telecide(order=1,Guide=2,Post=0) in your .avs and watch the interlacing magically disappear.

By the way Kast, please don't mention rented DVDs. There's a Announcement (http://forum.doom9.org/announcement.php?s=&forumid=6) at the top of this forum that spells it out. In this case point 6 applies. Thanks.

[killingspree]

as a native PAL encoder, I can assure manono, that the standard PAL DVD is encoded progressive, the main movie that is. when it comes to extras or basically almost all content encoded with an AR of 4:3 approx 90% of the content is interlaced.

to come to joe355's question: as manono said, both 720x576 progressive and interlaced are perfectly fine, and honestly i wouldn't notice a difference on a standard TV. still, i've never seen true 16:9 content encoded interlaced, never.

so point is, as manono pointed out already, if your source is already interlaced you might want to go for an interlaced PAL DVD, otherwise i see absolutely no reason for interlacing progressive content!

cheers
steVe

[joe355]

thx all. Most of my source content is progressive, so if there is no drop in quality on a standard TV, there shouldn't be any reason to change it.

[Kast]

Originally posted by manono
Hi-

Yeah, Zhnujm's right. A major movie like that can't be interlaced. On what are you basing that claim? DVD2AVI? It lies. If you open the .d2v in something like GKnot, you shouldn't see any interlacing. And even if you do, put on Telecide(order=1,Guide=2,Post=0) in your .avs and watch the interlacing magically disappear.

By the way Kast, please don't mention rented DVDs. There's a Announcement (http://forum.doom9.org/announcement.php?s=&forumid=6) at the top of this forum that spells it out. In this case point 6 applies. Thanks.

Shoot me right now, just shoot me! I had no idea! Damn i've been deinterlacing progressive movies all that time? And I'm really sorry for breaking the rules.