Resolution: I don't understand something, please explain. at DVinfo.net

Norris Combs · May 19th, 2008, 10:28 PM

Commercial SD DVD movie is MPEG-2.
For burning my home movie project, I of course selected MPEG-2 as well.
Why is it that when I play the commercial DVD movie, blown up full screen on a 28" monitor (1920 x 1200), I don't see jagged edges. However, when playing my home made DVD, there are jagged edges. Both DVDs are 720 x 480, right?

Thanks,

Glenn Chan · May 19th, 2008, 10:42 PM

You might get jagged edges depending on how you downconvert your material.

The MPEG2 encoding may also introduce stairstepping.

What is your source material?

Stas Bobkov · May 19th, 2008, 11:28 PM

If source material for your home DVD is interlaced (like 60i footage from a miniDV camera) then you'll see jagged edjes on computer monitor which is a natively progressive device, unless de-interlacing feature is enabled in your software DVD player.
Commercial movie DVDs are made of progressive material (film) so there is no interlacing artefacts while playing them on PC.
Maybe this is your case - interlaced vs de-interlaced source on progressive display.

Norris Combs · May 20th, 2008, 10:32 AM

Quote:

Originally Posted by Glenn Chan

You might get jagged edges depending on how you downconvert your material.

The MPEG2 encoding may also introduce stairstepping.

What is your source material?

The source material is HD from a Canon HV10.
Thanks,

Norris Combs · May 20th, 2008, 10:35 AM

Quote:

Originally Posted by Stas Bobkov

If source material for your home DVD is interlaced (like 60i footage from a miniDV camera) then you'll see jagged edjes on computer monitor which is a natively progressive device, unless de-interlacing feature is enabled in your software DVD player.
Commercial movie DVDs are made of progressive material (film) so there is no interlacing artefacts while playing them on PC.
Maybe this is your case - interlaced vs de-interlaced source on progressive display.

I played the home DVD using 3 different applications: Nero, Window Media Center, and Windows Media Player. Do you know if this "de-interlacing function" is available with what I have? What do YOU use to play your home DVDs?

Thanks,

Stas Bobkov · May 20th, 2008, 04:10 PM

I rearly play DVDs on computer (normally on a standalone DVD player) but when I do I use PowerDVD, it de-interlaces video by default. Windows Media Player de-interlaces by default too. I'm not familiar with other two you mentioned but I can also recommend VLC player with the most extended options for de-interlacing.
I didnt realize you had an HD source. This might be downscaling distortions then, nothing to do with de-interlacing. It's hard to say though without seeing the picture.

May 19th, 2008, 10:28 PM	#1
Norris Combs Major Player Join Date: Apr 2008 Location: OC, CA Posts: 344	Resolution: I don't understand something, please explain. Commercial SD DVD movie is MPEG-2. For burning my home movie project, I of course selected MPEG-2 as well. Why is it that when I play the commercial DVD movie, blown up full screen on a 28" monitor (1920 x 1200), I don't see jagged edges. However, when playing my home made DVD, there are jagged edges. Both DVDs are 720 x 480, right? Thanks,

May 19th, 2008, 10:42 PM	#2
Glenn Chan Inner Circle Join Date: Jun 2003 Location: Toronto, Canada Posts: 4,750	You might get jagged edges depending on how you downconvert your material. The MPEG2 encoding may also introduce stairstepping. What is your source material?

May 19th, 2008, 11:28 PM	#3
Stas Bobkov Regular Crew Join Date: May 2008 Location: Nanaimo, BC, Canada Posts: 46	If source material for your home DVD is interlaced (like 60i footage from a miniDV camera) then you'll see jagged edjes on computer monitor which is a natively progressive device, unless de-interlacing feature is enabled in your software DVD player. Commercial movie DVDs are made of progressive material (film) so there is no interlacing artefacts while playing them on PC. Maybe this is your case - interlaced vs de-interlaced source on progressive display.

May 20th, 2008, 04:10 PM	#6
Stas Bobkov Regular Crew Join Date: May 2008 Location: Nanaimo, BC, Canada Posts: 46	I rearly play DVDs on computer (normally on a standalone DVD player) but when I do I use PowerDVD, it de-interlaces video by default. Windows Media Player de-interlaces by default too. I'm not familiar with other two you mentioned but I can also recommend VLC player with the most extended options for de-interlacing. I didnt realize you had an HD source. This might be downscaling distortions then, nothing to do with de-interlacing. It's hard to say though without seeing the picture.