CCE's image quality priority

[forjononly]

Thx for all ur help so far ppl. Anyway, after I started encoding SVCDs at image quality priority 17 ( as in the guide ), i noticed that for high action parts, the quality seems to go down, as in u can see the pixels and such. So in order to get rid of this, what image quality priority should I use?

[Clixo]

i use 1, and get god results

[Mozart]

let image quality priority - which is not the same thing of Qfactor - as default. Its value, 17, is good enough for any movie. These problems with high action scenes are correlated with the combination number_of_pass+average_bitrate. For example, If you are using 1passVBR, CBR or multipass 2 pass VBR, with a bitrate smaller than 2300, you will have these issues.

@clixomano:
It is not wondering that you have mosquito noise in your encoding, as you had reported in another thread. Using image quality priority equal to 1, CCE will try to optimize the edge as if they were points...

[markrb]

There is a thread in the CCE forum that has a pretty good explanation.

Qouting western shinma here
This setting is widely misunderstood. It has nothing to do with VBR, as far as I can tell. Basically, lower settings result in reduced noise around edges, but if you go too far then you get artifacts in flat areas like backgrounds. The default of 25 seems to work pretty well, although I prefer using a lower number since there always seems to be some edge noise.

Keep in mind that by changing this tab you are throwing off the calculations made by DVD2SVCD for the number of cd's used. A lower setting will create a larger image file.

Before I mess with that setting I would take a look at your bitrates. Remember that the Avg rate is adjusted to make the movie fit the number of CD's you select, but does not exceed the Max Avg setting in the bitrate tab.

Take a look at the DVD2SVCD_log.txt file. In this you will find the three setting of Max, AVG and Min. If the Avg is below the Max Avg of the bitrate tab, DVD2SVCD has reduced the bitrate to make it fit. To fix this increase the number of cd's used for a given time period.

You can also adjust the Max tab. I personally use 2525, because my DVD player can handle this rate no problem. This will help with high motion complex scenes. Check to see what you player is capable of at www.vcdhelp.com or do what I did and take very complex chapters and make test encodes at various bitrates on a CDRW disk. Check for audio problems as well as video as the audio is usually the first to have problems with too high a bitrate. A good test disc is Waterworld and almost all of the fighting chapters have very high bitrate needs.

Best way to learn is test, test, test, but first start at what will make the greatest difference and that is the bitrate.

Mark

[Linux]

Originally posted by markrb
Basically, lower settings result in reduced noise around edges, but if you go too far then you get artifacts in flat areas like backgrounds.
Mark
Now I am confused.

If I look at the help in CCE it say as following:
"As this value becomes small, more bits will be allocated to complex pars. As a result. mosquito noise will be reduced. Conversely, if this value becomes large. more bits will be allocated to flat part. Then contouring noise on a flat part will be reduced."

What is the difference with "reduced noise around edges" and "contouring noise on a flat part".
Is my English so bad or does not contour and edge meen the same thing?

If I want to reduce edge effects, shall I make the Image Quality priority Larger or Smaller?

[markrb]

Linux I am no expert on CCE. I pulled that qoute from the CCE forum. Although we use CCE here and have at least a halfway decent knowledge of it, I think more technical questions could be better answered in the CCE forum. I am not blowing you off or anything, just showing the limits of my knowledge on this subject. Those guys know much more about the inner workings and tweaks then we do here.
Try searching through there and then if you don't find what you need try a post in the CCE forum. I suspect you will get a better answer.
Most people are pretty happy with with the default setting and don't question it here.

Mark

[SiliconSoul]

kiss of the dragon a good movie to test with?