Some questions about DRB Pro

[kristian65]

Hi im a newbie and have some questions i be happy if some1 could help me out with them.

As encoder im using CCE.

1. If i encode a dvd 5 gigs movie only how much better is DRB then lets say clone dvd i mean in output quality?

2. How can i check if my movies is interlaced or progressive?

3. If my movie is 16:9 allready will it do anything if i tick "convert from LB4:3 to 16:9?

4. How many passes should i use dont care about the time it takes since my computer enqodes when im at work, is the 10 passes best quality or is it overkill?

5. Is there any movie quality difference between CCE basic and SP when encoded.

Thanking everybody that will take some time 2 answer my questions Kristian

[Digga]

1. If i encode a dvd 5 gigs movie only how much better is DRB then lets say clone dvd i mean in output quality?Over the course of the past couple of years DVD ripping techniques have changed
dramatically. Newer "one click" programs have made backing up a DVD a fairly
simple process... but there is a significant trade-off. The quality that can
be attained by even the best of these programs is poor in comparison to original
techniques that used Cinemacraft Encoder, HC Encoder, QuEnc, or other top-notch
encoders. The reason is simple. When using one of these encoders the picture
is rebuilt from scratch and optimized for the resulting bitrate. One-touch
transcoders usually drop DCT coefficients or change quantization info in order
to lower the bitrate. This can result in pixelation and poor overall picture
quality.

4. How many passes should i use dont care about the time it takes since my computer enqodes when im at work, is the 10 passes best quality or is it overkill?http://forum.doom9.org/showthread.php?t=53770
"Image quality slightly improves each time encoding is repeated, but quality improvement reaches its limit at 3 ~ 4 times of encoding"

[techmule]

http://forum.doom9.org/showthread.php?t=53770
"Image quality slightly improves each time encoding is repeated, but quality improvement reaches its limit at 3 ~ 4 times of encoding"

Agreed, no point going beyond, 3-4 passes in any encoder. although i like autoqmatenc for its smartness in passes, even if you set lets say 10 passes and only 4 are required for the best output, it will bypass the other ones, in other words, it uses only as many passes as are required for best output and skips the rest, no matter if you have set 10 passes also.

[jptheripper]

Hi im a newbie and have some questions i be happy if some1 could help me out with them.

As encoder im using CCE.

1. If i encode a dvd 5 gigs movie only how much better is DRB then lets say clone dvd i mean in output quality?

2. How can i check if my movies is interlaced or progressive?

3. If my movie is 16:9 allready will it do anything if i tick "convert from LB4:3 to 16:9?

4. How many passes should i use dont care about the time it takes since my computer enqodes when im at work, is the 10 passes best quality or is it overkill?

5. Is there any movie quality difference between CCE basic and SP when encoded.

Thanking everybody that will take some time 2 answer my questions Kristian

1. if you are going from 5gb to 4.7gb the quality difference may not be noticable.

2. you dont need to check if your movie is interlaced or progressive, rb does it for you

3. if your movie is 16:9 and you check convert lb to 16:9 you will hack off the top and bottom of your movie then stretch (and distort) the image to fill the screen (BAD)

4. most agree over 3 passes is overkill. too many passes can actually make things worse (over smooth). all that being said, i do 5-6 passes.

5. cce basic and cce sp (2 pass) are the identical thing. the only (frequently used) difference between the two is the ability to do more passes.

[jdobbs]

1. if you are going from 5gb to 4.7gb the quality difference may not be noticableBut, of course, this is very rare. Most commercial DVDs are close to 8GB. On the vast majority of discs the difference in quality will be obvious.


I personally do two passes on almost all movies. If I decide to stretch it I will do 3. Frankly I can't see a difference between a 3 pass and a 10 pass encode.

[kristian65]

Thanks everybody for making my life easier hehehe.
Just 1 question more

2. you dont need to check if your movie is interlaced or progressive, rb does it for you

Ok does DRB pro check it sand adjust automaticly or should i have disable interlaced checked all the time cause i have been looking and i cant se anywhere in DRB pro that sayes if the movie is interlaced or not.

Thanks again K

[jptheripper]

almost never check it. let the program do it.

[Boulder]

I personally do two passes on almost all movies. If I decide to stretch it I will do 3. Frankly I can't see a difference between a 3 pass and a 10 pass encode.
If you have enabled CCE's adaptive quant matrix feature, there is a quite big difference between the second and third pass when you check what matrices have been used and where. On my short tests, the third pass had longer continuous sections of the same matrix whereas the second pass had many sections that were just one GOP long.

I cannot say which one looks better visually though. Still, it might be that the third pass is necessary to get everything out of the feature - the first pass would be setting the guidelines for bitrate fluctuation, the second one would lay the basic rules for the adaptive matrices and the third one would use the information gathered from the two passes to create an optimal output.