Jan

Stinky-Dinkins said:

Hay Harmy, on the BD will the DTSHDMA (I'm assuming this is the lossless codec you're using for audio) also have a lossy DTS core? I know nothing about the technical side of these things, or if that DTS core is automatically included in every DTSMA track (as it is with standard retail BD releases) but I was just wondering if it would automatically strip out the DTS lossy track from the lossless when that's selected and send it out optical if I choose to watch it with that setup. My 5.1 system and receiver isn't hooked up right now (not enough space) so I can't decode lossless at the moment, I am using a soundbar that accepts standard DTS, though.

A DTSHDMA track contains a lossy DTS core plus extensions that are added to make is lossless. So yes, the core is always there.

Harmy said:

The one from 3P0 in the desert to R2 in the canyon?

Yes

Could you do a clip of the wipe we talked about and which you said you redid? I'd like to see how it looks now

csl said:

Jan said:

DoomBot said:

Harmy said:

Actually, I'm definitely doing the BD now but it will come out later than the AVCHD and MKV, because it will need some work to make a BD release worthwhile.

Is the AVCHD and MKV going to be the same bitrate and quality as the BD?

 

Well that's surely possible. What you, Harmy, could do is to encode the video stream using settings for BD compliancy. You can also take this video stream and mux it straight into mkv. You'll only need to make two encodes then, one for BD and mkv and the second one for AVCHD (both 2pass ideally).

CRF is more ideal than 2pass ;)

Why would it be? As I said a few pages back, CRF will give the same quality than 2pass when the encodes are at the same bitrate. This is also confirmed by x264 developers. 

Now in the case of bluray you have a optical disc with limited capacity, hence you should use 2pass because you'll now the final bitrate before doing the encode. If you use CRF you don't know that and hence you might either waste (a lot of) disc space, or your file won't fit on the disc.

It's maybe not that much of a problem when you're using 720p and aiming for BD25, as you'll have plenty of space then, but for AVCHD it surely is.

DoomBot said:

Harmy said:

Actually, I'm definitely doing the BD now but it will come out later than the AVCHD and MKV, because it will need some work to make a BD release worthwhile.

Is the AVCHD and MKV going to be the same bitrate and quality as the BD?

Well that's surely possible. What you, Harmy, could do is to encode the video stream using settings for BD compliancy. You can also take this video stream and mux it straight into mkv. You'll only need to make two encodes then, one for BD and mkv and the second one for AVCHD (both 2pass ideally).

If you want to use lossless audio then you'll be somewhat limited when it comes to formats. Bluray only supports LPCM, DTS-HD and TrueHD.

+2 ;-)

Harmy said:

@Jan: Well, this is something that happens every time there is a wipe, the noticeability of it depends on how different the colourtiming is from shot to shot.

Ah I see. Is there anything you can do about that, f.e. selectivly color correcting certain areas of the frames? 

Just watched WP3R1 and I'm really really impressed Harmy.

There's only one color incosistency that "bugs" me a bit:

Beginning of the fade: [IMG]http://thumbnails52.imagebam.com/17409/1d2e40174086901.jpg[/IMG] 

End of the fade: [IMG]http://thumbnails65.imagebam.com/17409/286092174086905.jpg[/IMG] 

1pass VBR should be quite worse than 2pass, since in 2pass the first pass is done so that the encoder can determine how to best distribute the bits between the frames to achive both given bitrate and a good quality. In 1pass however the encoder has to sort of guess.

This results in scenes that get too many bits when they might not bee needed, and not enough bits when they would be needed (blocks and other artifacts will be visible).

Maybe I'll do some tests on the weekend, but I think 1pass VBR is worse than CRF as well.

First of all I wanna say thank you Harmy for the outstanding work you're doing, really fantastic. You can't imagine how much I'm looking forward to actually getting v2.0

I've watched WP2.3 yesterday and I liked it alot. Apart from the things that others have mentioned before there's one framing error that I noticed. Now I don't know wheter it was always there, but at least it's in the GOUT as well.

Frame 4032:

[IMG]http://thumbnails26.imagebam.com/17404/e115e2174036621.jpg[/IMG] 

About the encoding. I checked your settings in WP2.3 and see, I know it's a workprint and I know that you probably aimed for speed here and not for perfect quality, but I think for the final encode settings could still be improoved quite a bit.

What I suggest is that you aim for so called DXVA compatibility. This ensures that your file can be played back on the PC as well as on network media players and Bluray players. When using a resolution of 1280x542 as you did, the following settings should be chosen to achieve DXVA compatibility:

Profile: High (Main would work as well of course, but is very limited in other regards)

Level: 4.1

Reference Frames <= 12

Partitions: All but P4x4

VBV: Maxrate of 38000 and Bufsize of 30000 is safe

These are the settings used in x264, but I think they have similar names in the Adobe Encoder.

Now regarding 2pass vs. CRF (1pass). In CRF mode you choose a single value (so called CRF value in x264) which represents quality directly. This means that an encode made with CRF16 will have a different (better) quality than one made with CRF20. However, you can't predetermine the actual bitrate that the encoder is going to use. As it only does 1 pass and is therefor faster, this mode is recommended as long as you do not want to store the files on optical discs.

In 2pass mode however you choose the bitrate and the encoder is going to adjust the quality by itself in a way so that the bitrate is almost exactly met. This mode is therefore recommended if you want to store the encode on a DVD or Bluray. 

My point is that in the end you will get the exact same quality both in CRF and 2pass when both file have THE SAME BITRATE. 2pass does not have any better quality at all, it just lets you predetermine file-size, thats all.

Well, I would be glad if I could give any further suggestions regarding encoding settings and such.

Regards Jan