Question: deringing within MPEG2Source

Chainmax · 3rd August 2005, 23:10

I want to use deringing on the MPEG2Source line in one of my DVDs. Is it ok to just put MPEG2Source("X:\wherever\blahblah.d2v",cpu2="ooooxx") or should I add ipp=true?

Cyberia · 4th August 2005, 00:49

Well, you are really asking two different questions there.

Code:

cpu2="ooooxx"

specifies de-ringing only. While:

Code:

ipp=true

specifies whether or not to force interlaced or progressive post-processing. If you do not specify the ipp parameter, DGDecode will follow the PROGRESIVE_FRAME flag on a per-frame basis. That is, the post-processing mode is re-evaluated for every frame.

cpu2 and ipp are completely independant, so you can use one, the other or any combination.

Chainmax · 4th August 2005, 02:00

I know that the cpu2 line I posted means deringing only, but what I'm asking is that since I'm going to dering an interlaced stream (using that cpu2 call in the MPEG2Source line), shouldn't I set ipp=true? I thought that one had to set ipp=true for interlaced streams.

Video Dude · 4th August 2005, 15:09

Yes, set ipp=true when you have interlaced video.

Cyberia · 4th August 2005, 15:43

I'll repeat:

ipp specifies whether or not to force interlaced or progressive post-processing. If you do not specify the ipp parameter, DGDecode will follow the PROGRESIVE_FRAME flag on a per-frame basis. That is, the post-processing mode (ipp) is re-evaluated for every frame.

You do not have to specify ipp=true for interlaced video.

I would probably not specify the parameter and let DGDecode decide. If that doesn't work to your satisfaction, you can force one mode or another.

Chainmax · 4th August 2005, 17:32

Ok, I understand now. Sorry for the pig-headedness

.

What would be the advantage of using this switch instead of letting DGDecode evaluate each frame, depending on the source? Maybe a speed increase?

Cyberia · 4th August 2005, 17:54

Well you'd want to use the ipp switch if the PROGRESSIVE_FRAME flag appears to be unreliable (ie: bad encode/mastering errors)

3rd August 2005, 23:10	#1 \| Link
Chainmax Huh? Join Date: Sep 2003 Location: Uruguay Posts: 3,103	Question: deringing within MPEG2Source I want to use deringing on the MPEG2Source line in one of my DVDs. Is it ok to just put MPEG2Source("X:\wherever\blahblah.d2v",cpu2="ooooxx") or should I add ipp=true?

4th August 2005, 00:49	#2 \| Link
Cyberia Moderator Join Date: Nov 2002 Location: Inside Posts: 718	Well, you are really asking two different questions there. Code: cpu2="ooooxx" specifies de-ringing only. While: Code: ipp=true specifies whether or not to force interlaced or progressive post-processing. If you do not specify the ipp parameter, DGDecode will follow the PROGRESIVE_FRAME flag on a per-frame basis. That is, the post-processing mode is re-evaluated for every frame. cpu2 and ipp are completely independant, so you can use one, the other or any combination.

4th August 2005, 15:43	#5 \| Link
Cyberia Moderator Join Date: Nov 2002 Location: Inside Posts: 718	I'll repeat: ipp specifies whether or not to force interlaced or progressive post-processing. If you do not specify the ipp parameter, DGDecode will follow the PROGRESIVE_FRAME flag on a per-frame basis. That is, the post-processing mode (ipp) is re-evaluated for every frame. You do not have to specify ipp=true for interlaced video. I would probably not specify the parameter and let DGDecode decide. If that doesn't work to your satisfaction, you can force one mode or another. Last edited by Cyberia; 4th August 2005 at 15:46.

4th August 2005, 02:00	#3 \| Link
Chainmax Huh? Join Date: Sep 2003 Location: Uruguay Posts: 3,103	I know that the cpu2 line I posted means deringing only, but what I'm asking is that since I'm going to dering an interlaced stream (using that cpu2 call in the MPEG2Source line), shouldn't I set ipp=true? I thought that one had to set ipp=true for interlaced streams.

4th August 2005, 15:09	#4 \| Link
Video Dude Senior Member Join Date: Apr 2004 Posts: 1,054	Yes, set ipp=true when you have interlaced video.

4th August 2005, 17:32	#6 \| Link
Chainmax Huh? Join Date: Sep 2003 Location: Uruguay Posts: 3,103	Ok, I understand now. Sorry for the pig-headedness . What would be the advantage of using this switch instead of letting DGDecode evaluate each frame, depending on the source? Maybe a speed increase?

4th August 2005, 17:54	#7 \| Link
Cyberia Moderator Join Date: Nov 2002 Location: Inside Posts: 718	Well you'd want to use the ipp switch if the PROGRESSIVE_FRAME flag appears to be unreliable (ie: bad encode/mastering errors)