It's also worth mentioning that the same problem exists going in the
other direction.
If you export a 10-bit uncompressed material from the Avid using
same-as-source, you get a 10-bit quicktime. Testing will confirm it
really is 10-bit. But if you bring this into After Effects it shows up
as a footage item with only "Millions of Colours" and pixel values are
truncated to 8 bits.
Cheers,
--Michael
On 11-04-10 2:54 PM, Chris wrote:
>
> So Michael, if I read this right you are saying there is no way to any
> sort of QuickTime out of after effects for Avid import and stay 10 bit.
>
> Correct?
>
> Wow! Is this an Adobe or Avid problem (codec)?
>
> Chris Magid
> RTVF
> Office- 214 350 7212
> Cell---- 214 766 7212
>
> On Apr 10, 2011, at 1:56 PM, Michael Brockington <brocking@sfu.ca
> <mailto:brocking%40sfu.ca>> wrote:
>
> > Hi Nigel:
> >
> > When I was looking into this a few months ago, Avid confirmed that
> > all third-party 10-bit codecs were truncated to 8 bit on both import
> and
> > export. With quicktime, the only way to preserve 10 bits in and out was
> > through fast-import of Avid-codec quicktimes and Same-as-source
> > exports. The other option was to use 16-bit TIFF file sequences, which
> > was what worked best for my circumstances. I am currently working on
> > 5.0.3.x, and that release stills seems to truncate in the same way.
> >
> > In terms of confirming whether your export is 10-bit or not, you
> > could bring your clips into After Effects and check what it reports
> when
> > you select the item in the footage window. It will identify 10-bit
> > footage as having Trillions of Colours (vs Millions for 8-bit.)
> > However, this won't show you if your footage has been truncated to 8
> > bits within the 10-bit range. You would need to do some testing with
> > test patterns to confirm that. The other problem with After Effects, is
> > it doesn't seem to recognize Avid's 10-bit codecs (AvidPacked and
> > RGBPacked) as having 10 bits, only 8. One reason why TIFF sequences
> > work better for me for 10-bit file exchange.
> >
> > Cheers,
> > --Michael
> >
> > On 11-04-10 7:37 AM, Nigel Gourley wrote:
> > >
> > > So we AMA to 4:4:4 prores QT and then want to export as RGB
> > > uncompressed QT.
> > > This all works except I wanted to confirm it was actually a 10 bit
> > > file and
> > > not 8 bit. How do we do this.. We have used mediainfo usually for
> > > finding a
> > > file spec but while it gives bits for some formats it doesn't for
> others
> > > including prores..
> > >
> > > How can we confirm it's a 10 bit file if indeed it is?
> > >
> > > Thanks
> > >
> > > N
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> >
> > [Non-text portions of this message have been removed]
> >
> >
>
> [Non-text portions of this message have been removed]
>
>
[Non-text portions of this message have been removed]
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