02-05-2003, 01:27 PM
|
Free Member
|
|
Join Date: Dec 2002
Location: Corvallis, OR
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
@kwag
I just watched two of my one-disc encodes, one encoded MPEG1 and the other MPEG2.. in both of them, in scenes where there was a lot of red, the quality of the picture seemed to drop dramatically. The two movies I noticed it in was in Chicago and The Thing -- Chicago has a lot of scenes with red lighting and The Thing as well. In Chicago, there is a part where the lighting changes quickly from red to blue, and there is an almost instant change in quality (seems like once the GOP caught up, the quality went back to normal).. I'll post clips soon..
Anyone else notice this?
|
Someday, 12:01 PM
|
|
Site Staff / Ad Manager
|
|
Join Date: Dec 2002
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
|
|
|
02-05-2003, 05:39 PM
|
Free Member
|
|
Join Date: Dec 2002
Location: Corvallis, OR
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Here is the sample.
This was encoded using Notch 1a and CQ of 60-something if I remember correctly.
It might not be very apparent watching it on your computer -- if you pause at any point during the scenes with a lot of red, you'll notice lots of artifacts all over the picture (more than usual), including in the background and on the characters.. It is VERY apparent when watched on the TV -- maybe burn it on a CD-RW and watch the sample on a TV..?
What do you think?
EDIT: It also seems to get progressively worse through the red scene, then when it switches back to normal/blue light, the artifacting/noise is back to very little (regular amounts)
EDIT: Or maybe the red just makes it more noticeable..?
|
02-05-2003, 06:28 PM
|
Free Member
|
|
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Hi gonzopdx,
Ok, I watched the sample. Definitively the CQ is too low for that type of film, or you didn't use the appropiate filters. Did you use FaeryDust() and TemporalCleaner()
Because if you didn't, that would really help on that type of film
What is your .avs script?
-kwag
|
02-05-2003, 10:55 PM
|
Free Member
|
|
Join Date: Dec 2002
Location: Corvallis, OR
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
I'm not sure if the CQ was 60 or if it was higher -- it may have been 76
But the quality throughout the rest of the movie is fantastic! It's just when there's a lot of red on the screen that the quality drops, then as soon as the red disappears the quality shoots right back up. I prefer not to use C3D or Dust unless I absolutely have to because it seems that it smooths the image too much and it loses a lot of detail..
My encode of The Thing, which had a CQ of 78, also displays this problem.. I'm pretty sure it's not the .avs script or the CQ, but the encoder's handling of reds or too much red..
My .avs is typical..
Code:
(...plugins...)
source()
Trim()
Crop()
LegalClip()
Resize()
FluxSmooth()
BlockBuster(noise .3)
LegalClip()
...?
|
02-05-2003, 11:01 PM
|
Free Member
|
|
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Hi gonzopdx,
Give SpaceDust() and TemporalCleaner() a try
-kwag
|
02-07-2003, 12:05 PM
|
Free Member
|
|
Join Date: Aug 2002
Location: Canada
Posts: 200
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
I don't know if anyone else has noticed this but...red seems to give Mpeg1 and Mpeg2 a hard time.
I recently rented "Signs" on DVD and I noticed that a scenes showing the red walls that had losts of macro blocks while the rest of the movie is excelent. (I'm talking about the scene where we watch the wall as we listen bumgs going on outside) I've noticed this same problem with red on some other movies also.
I guess what I'm saying is the problem may be with the source.
|
02-07-2003, 12:40 PM
|
Free Member
|
|
Join Date: Jan 2003
Location: S.Paulo-Brasil
Posts: 185
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Same here. In my Insomnia encode, even with spacedust() and temporalcleaner(), I got more blocks on red scenes. Like when AlPacino is in his room trying to sleeping. A low action scene, more red by the afternoon's athmosphere of the room. I'll send a clip, if I can match it.
LaBomba
|
02-07-2003, 12:51 PM
|
Free Member
|
|
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Anyone tried BlockBuster "Noise" with a level of .7 or .8 on these scenes
|
02-07-2003, 01:11 PM
|
Free Member
|
|
Join Date: Jan 2003
Location: S.Paulo-Brasil
Posts: 185
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Nope. I could try it later. Could you give me some hint how to test this filter only in few scenes. Should I make a clip, cutting the film, and then testing some filters? How is the sequence and the tools?
LaBomba
|
02-07-2003, 01:21 PM
|
Free Member
|
|
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Quote:
Originally Posted by labomba
Nope. I could try it later. Could you give me some hint how to test this filter only in few scenes. Should I make a clip, cutting the film, and then testing some filters? How is the sequence and the tools?
LaBomba
|
Just select a source range in TMPEG and encode only that portion.
-kwag
|
02-07-2003, 01:36 PM
|
Free Member
|
|
Join Date: Jan 2003
Location: S.Paulo-Brasil
Posts: 185
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Quote:
Originally Posted by kwag
Quote:
Originally Posted by labomba
Nope. I could try it later. Could you give me some hint how to test this filter only in few scenes. Should I make a clip, cutting the film, and then testing some filters? How is the sequence and the tools?
LaBomba
|
Just select a source range in TMPEG and encode only that portion.
-kwag
|
Sorry Kwag.
I don't know how to select a souce range in TMPEG .
I even tried to open it and look around before reply you, but I can´t see where I can select ranges in TMPEG. Would be on the .avs script or something like in VDub.
Sorry again!
LaBomba
|
02-07-2003, 01:42 PM
|
Free Member
|
|
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Run TMPEG. Then click on "Settings" then click on "Advanced" and double click on "Source Range". Now you can play with start and end position.
-kwag
|
02-07-2003, 02:28 PM
|
Free Member
|
|
Join Date: Jan 2003
Location: S.Paulo-Brasil
Posts: 185
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
|
02-07-2003, 02:44 PM
|
Free Member
|
|
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
Quote:
Originally Posted by labomba
Another thing: are there any way to use specifcs filters on specifics parts, something like encoding the film "a la carte"
Labomba
|
You could do it, but you would have to write functions in your avisynth script, in order to process different ranges with different filters. Not very amusing
-kwag
|
02-07-2003, 02:50 PM
|
Free Member
|
|
Join Date: Jan 2003
Location: S.Paulo-Brasil
Posts: 185
Thanks: 0
Thanked 0 Times in 0 Posts
|
|
NO WAY!!
I really can live with these "little and candy" Blocks at all!
Thanks.
LaBomba
|
All times are GMT -5. The time now is 04:42 AM — vBulletin © Jelsoft Enterprises Ltd
|