Can MEP2013 create a Progressive DVD that will play correctly without aliasing and jerking on set top DVD players

Scenestealer wrote on 5/8/2013, 3:02 AM

Hi All

I am having a hard time creating a 720x576 Progressive DVD disc from 1080p footage that will play correctly on my own and other DVD players.

I have performed many test encodes and burns with different settings, bitrates and discs and while they all play correctly on my PC's DVD burner and as files (VOB or MPEG2) on my plasma TV, via my WDTV Live player, none of them will play on standalone DVD/Bluray players without extreme or intermittently extreme aliasing plus jerking on pans.

My obsevations so far:-

It is as though the player can not decide/recognize that the the disc is progressive and tries play it as though it is interlaced and the field order is wrong. Horizontal (or perhaps diagonal) lines eg. looped telephone lines become broken and severe aliasing or moire occurs on for example, a corrugated iron fence in the background.

The breakthrough came today when I tried the disc on a Pioneer BDP150 player in a shop and it appeared to play correctly with only sporadic dropouts back to the above disturbances.

Whilst all my AVCHD 1080 50p material and project settings are Progressive as are my advanced encoder settings either through the MPEG2 export or DVD burn set to Progressive PAL 720x576 16:9 - a Media Info analysis of the MPEG export or VOB file, curiously reports: Scan type - Progressive, Scan order - Bottom Field first. Is this a clue? How can progessive have a field order? Gspot also reports the files are interlaced.

Delving into the depths of the Advanced MPEG2 encoder settings where it warns you not to go, there is a section where you can set Motion search parameters etc., there is a setting for something called a sequence extension which can be set to indicate the stream is Progressive and interlaced set = 0 or Progressive only set=1. The default is =0. Could this be the problem??

Has anyone experienced the above problems when starting with Progressive material and trying to maintain this right through the chain? Maybe this is not so common with video although I am sure some have burned progressive DVD's with stills where you probably would see it with Pans and zooms of the images.

Peter

Comments

johnebaker wrote on 5/10/2013, 1:21 AM

Hi SS

I have the same problem in reverse ie Progressive to Interlaced and it is due to Pulldown

The biggest problem is on pan shots as you have experienced - unless they are very slow the is a visible amount of jerking.

AFAIK PAL spec is Interlaced and you cannot create a progressive DVD - at least al my attempts have failed .

Good article on Interlacing here.

John

Scenestealer wrote on 5/11/2013, 2:07 AM

Hi John

That is a good article which possibly gives some clues as to why my progressive material looks bad if the TV is trying to interlace it as in the animated gif of the green ball demonstrating "progressive video on an interlaced display". In this example it shows a much larger horizontal displacement in time which would explain more noticeable jerking but I guess the question is why is the Flat panel TV which uses a progressive panel not able to display a progresive picture from the DVD player? It could be that the DVD player is interlacing the signal or that the TV is trying to deinterlace the signal that is not interlaced and creating a mess. These modern displays being progressive obviously have deinterlacing built in because all broadcast signals are interlaced to my understanding.

Also why can the Media player display the same progressive VOB file correctlly but the disc player not? Also I have tried the discs on a DVD player that you can choose Progressive or interlaced connected to a CRT TV that allows you to choose Prog. or Int. but no improvement.

This can not be a pulldown problem becausethe original footage from my camera is 50 frames progressive PAL and the DVD is burnt 25fps Progressive.

Peter