Making MKV from blu-ray disc using BDRB

[varekai]

Making MKV from blu-ray disc using BDRB:

Alternate Movie-Only output
MKV Container, 1920x1080, Intact Audio (AC3 640kbs)
Constant Rate Factor Output (CRF): 18

Is it possible to enable two pass encoding, I mean without specifying any bitrate?
Better quality with two pass? (I know I'm anal but that's me!) :p

Thanks!

[jdobbs]

I don't think there would be any quality improvement in performing two passes using CRF.

[varekai]

I don't think there would be any quality improvement in performing two passes using CRF.
Is it possible to enable two passes? If so how do I do that?

Thanks!

[Mikeyb123]

Although I've never tried it I believe you would check the "Movie-Only Backup" option under the "Mode" tab, return to the Mode tab and select "Alternate Movie-Only Output". A contextual menu will open and you will de-select the top option if it is checked which should then allow you to select from a variety of different options for the output file. Choose your desired option and just below the output option, check the second option, " Two-Pass Bitrate Encoding." Is that what you mean?

[varekai]

http://oi43.tinypic.com/2rc7qfl.jpg
http://oi43.tinypic.com/2u47l6s.jpg
In picture 2 Two Pass Bitrate Encoding (Kbs): setting 3000 is greyed out.
Question is if I select settings as picture 2 will CRF 18 settings "override" that value of 3000 an compress using CRF 18 with two passes?

[gonca]

@varekai

3000 Kbs will be used, I believe. If you want to change the bitrate, do it in vbitrate in Alternate.txt

[varekai]

@varekai

3000 Kbs will be used, I believe. If you want to change the bitrate, do it in vbitrate in Alternate.txt

OK, thanks, will do some tinkering in there.

Regards

[Groucho2004]

Using n-pass encoding without wanting to hit a specific bitrate seems like utter nonsense to me.

[varekai]

Using n-pass encoding without wanting to hit a specific bitrate seems like utter nonsense to me.

Sorry for being so illiterate...
Maybe a child of five would understand this. Send someone to fetch a child of five.

[Groucho2004]

Sorry for being so illiterate...
Maybe a child of five would understand this. Send someone to fetch a child of five.
No need to be offended. If you feel the need to waste energy - go for it.

[varekai]

No need to be offended. If you feel the need to waste energy - go for it.
Nah, I'm not offended, just trying to get the most out of blu-ray to mkv encode. For shure I'm wasting energy in form of electricity.
Made some encodings with CRF 18 and they look amazing in quality and at a third of original size (60gb).
So I will keep it simple from now on and use CRF 18.

Regards

[Jackie]

Using n-pass encoding without wanting to hit a specific bitrate seems like utter nonsense to me.

I guess the program calcualtes the space required to fit on the medium selected (i.e. BD 25), and calcualtes the bitraterequired to fit the whole video content. That's at least how I would do it... ;)

[writersblock29]

@varekai

If you're using CRF18 on a high definition source, I doubt you'll notice any improvement that you are able to make. You can test this for yourself by encoding a chapter of a demanding movie at CRF18, then re-encoding that same chapter at CRF17. If you can get someone else to open the files for you to view (so you don't know which is which), can you tell them apart? For kicks, try another encode at CRF20 and see if you can tell it from CRF18.

Really it's all about how much space you're trying to save on your hard drive or media. If space isn't a factor and you want the best possible quality, don't re-compress at all. If space is kinda-sorta an issue, but quality is paramount, then create movie-only MKVs by way of remuxing. Then instead of squinting at your screen looking for the slightest variations from source to source, you'll be watching movies. :)