Recine to Avid Adrenaline Workflow

[Gareth Parry]

Hi,

Please assume my complete ignorance in any replies you may give to this thread.

We are using Redcine to create 1080 25 PsF Quicktimes in Avid DNxHD codec, which we are then importing using an ALE into a PAL 16:9 project.

We have just installed the new 1.10 Avid Codec pack, which has resolved our garbled quicktime outputs.

My clients are now questioning the exposure of the footage, as a lot of it seems to be burnt out. I know that Redcine is doing a conversion from Log to Linear, and the settings are:

Colourspace: Redspace
Gamma: Redspace
Number: 2.2

How can I find out if this conversion is correct? I'm hoping to speak to the technician from the shoot in Canada, but I have to wait until he wakes up.

If any one could give me there advice or experience, I would be eternally grateful.

Thanks,

Gareth

 

[Virgil Kastrup]

For offline files I always use camrgb & rec709.

 

[MichaelP]

Since DNxHD is an HD format, you should be targeting a REC709 on output. Your colorspace is up to you and your DP. Be sure to select REC709 settings in the MC import window so none of the values change when importing. If highlights are being lost, work with the images in REDCNE to get the look you want as REC709 before the transcode process.

Michael

 

[Nick Shaw]

As others have said above, you are better off using Gamma=rec709 rather than REDspace. REDspace adds a curve to the image which although it looks more punchy and therefore 'pleasing' at default settings, can often have the effect of burning out highlights, which do in fact still have detail in them.

Set gamma=rec709 in Redcine, and the image will look a bit flat initially, but you can grade as desired, rather than using the REDspace 'preset grade'.

 

[Michael Lindsay]

I agree with all the above.

What I would add is:

For ofline it is sometimes nice to work with a punchier image. If this is the case you could continue using Gamma Redspace but lowering exposure -.19 (in redcine). This should stop most if not all the burning out.

As for colour space I NEVER use REC 709 even though I nearly always use Gamma Rec 709. Colour space rec709 I believe to be broken in the version of Redcine I'm using and unusable. It is very important ot understand the difference between colour space and gamma since they use similarly named option which can confuse.

Also consider redrushes as the tool to create ofline media..

It is 'much' more reliable.

you can create a ALE within this tool at the same time.

And just in case you missed it... it is much more reliable.

good luck

Michael L