Hi Nigel:
When I was testing this out originally, I was having other issues
with AMA imports, so I don't think I tested it in the same way. It may
well be that AMA import does preserve the 10-bits. The following reply
which I got back then from Michel Rynderman at Avid certainly implies
that it might:
> When you import (not AMA) the imported video from a 10bit third party
> codec will always be truncated to 8 bit. When you import the Avid
> RGBPacked you should be able to see it do a "fast import" in which case
> it just copies the entire frame preserving all 10 bits
When I think about it, I find it hard to believe that AMA linking to
R3D files, for instance, would be considered acceptable if it was only
bringing in 8 bits of info.
Cheers,
--Michael
On 11-04-10 12:39 PM, Nigel Gourley wrote:
>
> Hi there,
>
> Thanks for this, that's very interesting, have you tried any of this with
> AMA?
>
> N
>
> From: Avid-L2@yahoogroups.com <mailto:Avid-L2%40yahoogroups.com>
> [mailto:Avid-L2@yahoogroups.com <mailto:Avid-L2%40yahoogroups.com>] On
> Behalf Of
> Michael Brockington
> Sent: 10 April 2011 19:56
> To: Avid-L2@yahoogroups.com <mailto:Avid-L2%40yahoogroups.com>
> Subject: Re: [Avid-L2] RGB QT export
>
> 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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