[Avid-L2] Re: DNxHD QuckTime FCP Import Question

It is my understanding that the Avid DNX codec is alway considered to be 601 not RGB. When you check the RGB for export you are telling QT to adjust the video levels from RGB to 601 level when making the QT so that when the Avid imports it the levels will always be interpreted as 601 and come out right. By definition the DNX codec is 601. You can get fouled up if your source is RGB but you check 601 option then it will not lower the RGB levels to 601. If you are exporting from an Avid timeline that would be 601 space so I don't think it would be correct to check RGB on export. If you are exporting captured material that too would be 601 level. Am I missing something here. It was just last week I read about this and I thought the light had finally turned on for me regarding why some imports in Avid codecs don't change no matter RGB or 601 on import. Is my light fading, please say it ain't so.

--- In Avid-L2@yahoogroups.com, Dennis Degan <DennyD1@...> wrote:
>
>
> On Feb 4, 2010, at 5:30 PM, jim howat wrote:
>
> > Anyone advise on the cleanest route from Avid DNxHD timeline to FCP?
>
> I say:
>
> I just advised on this earlier today. Here's a updated version of
> what I said:
>
> Export the Avid timeline as "Same As Source" (IOW, Avid CODEC, DNxHD)
> and use "RGB" color space to make a Quicktime Movie, self-contained.
> Using "RGB" as the color space ensures that there is no gamma shift.
> "As far as DNxHD is concerned, you CAN import Avid DNxHD QT Movies into
> FCP. You need the Avid CODEC package installed on your Mac. HOWEVER,
> you still cannot EDIT in FCP with the Avid DNxHD CODEC. Once you
> import the Avid QT Movie, you'll need to convert it to a CODEC that FCP
> will work with. I'd suggest you use ProRes422 or ProRes422(HQ). I've
> done this and it works well; it just takes more time.
> Here's my procedure: Open the drive that contains the Avid QT and
> Drag & Drop the Movie(s) into a bin in FCP. They will be highlighted
> in the bin. Pull down the File Menu to select "Media Manager" to open
> the MM window. Select "Recompress", choose a ProRes CODEC, and set
> your destination drive, then click OK. Wait until the process has
> finished.
> Once the recompression has completed, select the bin where the Avid
> QT's are highlighted and delete them (they are the original QT's; you
> can't use them). Of course this does not delete the actual QT's from
> your drive; it only deletes them from the bin.
> Find the NEW recompressed QT's on your destination drive and drag them
> to a bin, or use IMPORT to find them and place them in a bin. You may
> now edit like crazy.
> One final note: Older versions of Avid do not carry over timeline or
> clip timecode or clip reelname when exporting to Quicktime Movies. If
> that's important, you must note the starting TC of each timeline and
> clip (and reelname of each clip) when you do the Avid export, then
> Modify the new ProRes clip in FCP to put the correct TC into it. Bouke
> at Video ToolShed has a free application that can assist you with this
> called QTChange:
> <http://www.videotoolshed.com/product/42/qtchange>
>
> Dennis Degan, Video Editor-Consultant-Knowledge Bank
> NBC Today Show, New York
>

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