Bd-rebuilder: what is a good configuration?

[lauguru]

I do not understand, or get nothing. I just want to remove the grain.
filer in avs editor to be put?

RemoveGrain (mode = 17) ????:script:


http://subir.cc/images/avsfilter.jpg


please .. I see that there are enough people following the post, I need to know to put in the script, to do something in terms.
I write this, and it does not work:

Import ("C: \ Program Files (x86) \ AviSynth 2.5 \ plugins \ MCTemporalDenoise.v1.4.20.avsi")
MCTemporalDenoise (settings = "very low")



help please :(

[MrT.]

hello, I have a couple questions.
I read recently that it was possible to do 2 pass always when it sets to Auto? I was thinking Auto(good 95% of time) + 2 pass would be a better choice overall then HQ 2 pass.
(less time)

My other question is aboout output size. With auto(good) it leveled out at 22.1GB. HQ -2 pass, leveled out at 21.4GB. I changed the custom output size to 24000mb when using HQ and it leveled out at 22.0.
The default size you set..what output size do you expect? Is it ok to raise the custom output size in order to meet the expected output size?
Or would this mess with the process somehow. I read one of your post (jdobbs) months ago, which i can not find, but you mention 23,500mb is good cause it leaves room for errors or something like that? Is 22.1GB sounds right? or can i raise custom output until it outputs at 22.9GB. I thought 22.1GB was optimal, but it's actually 22.9Gb(23500mb).
TY for BD_RB

[rpareja]

Hello,
I have questions that may sound dumb for a lot of users, so I apologize in advance.

Question 1:
Is the bitrate value shown when encoding, directly related to the quality of the output? So the higher, the better?

Question 2:
Whenever I select AUTOMATIC SETTINGS, the log shows me the bitrate being used in the encoding process.
Is there a way to know what bitrate is being used whenever I select CRF or ABR encoding?

Question 3:
If CRF is selected, there is a line in the log that looks like this:
[13:22:40] Performing CRF Prediction...
- Analyzing 11.00 30.50 17.55 15.86 16.47 [16.50]
Encoding using constant rate factor.
Does this mean that after encountering bitrates of 11.00, 30.50, 17.55, etc. throughout the movie, the final constant bitrate that will be used is 16.50?

In case there is a way of knowing the bitrate that will be used in CRF or ABR, then I could try some settings combinations and see any considerable impact on the bitrate quality. Then decide which configuration I want to use before letting the program finish completely.

[jdobbs]

Hello,
I have questions that may sound dumb for a lot of users, so I apologize in advance.

Question 1:
Is the bitrate value shown when encoding, directly related to the quality of the output? So the higher, the better?

Question 2:
Whenever I select AUTOMATIC SETTINGS, the log shows me the bitrate being used in the encoding process.
Is there a way to know what bitrate is being used whenever I select CRF or ABR encoding?

Question 3:
If CRF is selected, there is a line in the log that looks like this:
[13:22:40] Performing CRF Prediction...
- Analyzing 11.00 30.50 17.55 15.86 16.47 [16.50]
Encoding using constant rate factor.
Does this mean that after encountering bitrates of 11.00, 30.50, 17.55, etc. throughout the movie, the final constant bitrate that will be used is 16.50?

In case there is a way of knowing the bitrate that will be used in CRF or ABR, then I could try some settings combinations and see any considerable impact on the bitrate quality. Then decide which configuration I want to use before letting the program finish completely.

1. Generally yes. But the value is relative -- so don't think it is linear. A complex source benefits from higher bitrates, while a simple source (e.g. a blank or all white screen) may have an upper limit over which higher bitrate has little or no impact. Also, bitrate isn't the only value that impacts quality. There are "bells and whistles" that can get more from a given bitrate -- many of which are reflected in the level of quality selected (High, Good, etc.).

Remember too, that BD-RB is using variable bitrate encoding (VBR). So the value shown is only an average. The 2 pass method analyzes the stream to determine where higher and lower bitrates are appropriate and they are allocated as needed. So a complex scene might be getting twice the shown bitrate while a lower complex scene might be getting half.

2. Bitrate doesn't really apply to CRF except as an upper limit. CRF attempts to encode at a constant quality level, ignoring size. When BD-RB uses CRF it first performs analysis passes to see which CRF value is results in output that is closest to the specified target size and uses that CRF value. ABR simply applies an algorithm that attempts to hit a specified average bitrate while doing only one pass. Both CRF and ABR use variable bitrates in BD-RB.

3. Those values aren't bitrates, they are quality settings. In CRF the bitrate used is whatever it takes to get to the specified quality level at any point in the video. In your example it was determined that a quality value of 16.5 would result in the correct size on output. 16.5 is an exceptional value for CRF and results in output that is virtually indistinguishable from the source.

[rpareja]

I know that it depends on the source and also in a lot of variables (length of the movie, quality of the source, bitrate, etc, etc)... but in general terms, if I want to compress a bd50 to a bd25 with movie-only selected (which in the stream window appears with approximately 32gb)... Will the output have better quality if I select AUTOMATIC SETTINGS (and let BD-Rebuilder decide everything) or if I manually select HIGH-QUALITY (which is the default) with ONE-PASS CRF selected?

[jdobbs]

I know that it depends on the source and also in a lot of variables (length of the movie, quality of the source, bitrate, etc, etc)... but in general terms, if I want to compress a bd50 to a bd25 with movie-only selected (which in the stream window appears with approximately 32gb)... Will the output have better quality if I select AUTOMATIC SETTINGS (and let BD-Rebuilder decide everything) or if I manually select HIGH-QUALITY (which is the default) with ONE-PASS CRF selected? In most cases you wouldn't see a difference. That's because AUTOMATIC chooses what is needed to get you to the best quality level based on the size (in framecount) of the source and the target size for output. If the source is challenging you might end up getting the HIGH QUALITY setting anyway.

AUTOMATIC is meant to save you time in encoding by only using the quality level that is necessary.

But... if the amount of time isn't a concern, and you'd rather not have to worrry about quality -- just set it to HIGH QUALITY and leave it there.

[roofrabbit]

I'm using "Highest (very slow)" settings for video on BD Rebuilder, ABR encoding . Compressing Blu-ray to 25 GB.

What is the best setting for audio in Setup? By best, I mean the way to keep the audio track as highest quality, which I assume is that comes with the original disk to be backed up.

V0.50.18

[jdobbs]

I'm using "Highest (very slow)" settings for video on BD Rebuilder, ABR encoding . Compressing Blu-ray to 25 GB.

What is the best setting for audio in Setup? By best, I mean the way to keep the audio track as highest quality, which I assume is that comes with the original disk to be backed up.

V0.50.18Check out this post in the FAQ:

https://forum.doom9.org/showthread.php?p=1447836#post1447836