HuffyUV capture + AviSynth + CCE = Luminance Levels?

[FulciLives]

Hello :)

I'm a fairly experienced user (or so I like to think) but I've always used PICVideo MJPEG on the 19 quality setting because my slow computer would drop frames here or there using HuffyUV BUT now ...

I got a new very fast computer and I want to use HuffyUV but since I never used it I never paid it much attention and I have a couple of questions:

I got HuffyUV V2.1.1 CCESP Patch v0.2.2

This is how I have it set up ... is this correct?

http://www.cryptofhorrors.com/medion/huffuv.jpg

Will this produce a YUY2/YUV capture?

Now I use AviSynth with CCE SP so is there anything special I need to know there in terms of luminance levels? Any special commands I need in AviSynth?

As for CCE SP do I want to use 0-255 or 16-235 for my setting? When I used PICVideo MJPEG with AviSynth and CCE SP I used the 0-255 setting.

Thanks for the help :)

- John "FulciLives" Coleman

[tedkunich]

John,

Settings look ok, although I seem to remember that the default filed threshold being higher something like 288.

As far as luminance levels, leave CCE at 0-255. Unless things have changed with later versions, selecting 16-235 compresses the range of the incoming signal whether it is needed or not. Set the proper luma ranges of your source and destination within your script where you know what is happening.


T

[FulciLives]

Originally posted by tedkunich
Set the proper luma ranges of your source and destination within your script where you know what is happening.
What exactly do you mean by this?

Are you talking about the last line in the AviSynth script being ---> ConvertToYUY2()

... or are you talking about something different?

- John "FulciLives" Coleman

[tedkunich]

Originally posted by FulciLives
What exactly do you mean by this?

Are you talking about the last line in the AviSynth script being ---> ConvertToYUY2()

... or are you talking about something different?

- John "FulciLives" Coleman

Sorta... that is always a good suggestion as some YV12 codecs do not behave as you would expect. What I mean by my previous post was to check and adjust if nessesary, that your source is within the proper luma range for your destination (PC or DVD) within the AVS script.

If you put ColorYUV(analyze=true) in your script (or a histogram), it will show you the max and min of the three channels (luma, U and V) Material destined for a DVD burn should have the luma in the 16-235 range, while those destined for PC usage (xvid, etc...) should be in the 0-255 range.


T

[Boulder]

You could use "Predict gradient", it's faster to decode. There's a newer version of HuffYUV than the one you appear to be using, it might be worth updating.

http://forum.doom9.org/showthread.php?s=&threadid=76396&highlight=huffyuv

[Schlumpf]

Originally posted by FulciLives
[...snip]
Will this produce a YUY2/YUV capture?


As far as I can see, this would produce a RGB-stream. When the setting "<-- Convert To YUY2" is not checked in the RGB-Box, the codec defaults to RGB-Compression.
And thx for the hint on that new version of Huffyuv, Boulder.

[Wilbert]

Material destined for a DVD burn should have the luma in the 16-235 range, while those destined for PC usage (xvid, etc...) should be in the 0-255 range.
... should also be 16-235. This luminance setting in CCE only does something if you feed it with RGB (check CCE faq for more info).