Monday, November 19, 2012

[Avid-L2] Re: 23.98 sequences in 59.94I 1080 master?

 

While I'm pretty sure it was originally intended to be a way to use the 8 bit portion of the 10 bit data as a "proxy", I'm not aware that this was ever actually exposed to the users.

--- In Avid-L2@yahoogroups.com, "johnrobmoore" <bigfish@...> wrote:
>
> Could this be invoked with the digital cut pull down menu for 8 or 10 bit? Maybe that's why the broke it out that way. Somewhat like Red cameras R3D files are constructed in a way that makes debayering more efficient on the fly with the various quality choices. I'm just speculating about the Red files in that I know it is relatively easy to pull out the various quality choices on the fly, or so I was told.
>
> --- In Avid-L2@yahoogroups.com, "herdsman101" <jfriend@> wrote:
> >
> > Yes, the "packed" codecs store 10 bits per component. These are stored in the media file as two sections per frame, an uncompressed 8 bit part and an 2 bit part. I believe the original intention was to make it more efficient to utilize a low rez playback of only 8 bits per frame, but I'm not aware of that ever actually being done. Typically they are run through an "unpacker" which outputs a 10 bit frame.
> >
> > -jf
> >
> > --- In Avid-L2@yahoogroups.com, Michael Brockington <brocking@> wrote:
> > >
> > > Hi John:
> > >
> > > I believe the 'packed' codecs ARE 10-bit. Here's Michel Rynderman's
> > > comment:
> > >
> > >
> > > > Yes, by "packed" we mean that we arrange the bits, losslessly, 10 per
> > > > component,
> > > > into some form that is more efficient in either size or performance.
> > >
> > > http://movies.groups.yahoo.com/group/Avid-L2/message/84197
> > >
> > > Cheers,
> > > --Michael
> > >
> > > On 12-11-17 11:39 AM, johnrobmoore wrote:
> > > >
> > > > I recall Mr. Rynderman mentioning there was a time when the x stood
> > > > for "Packed" not ten bit. QT Pro shows the media as 1:1x but we don't
> > > > capture 1:1X in Avid. This is why I think the "1:1x" displayed in
> > > > QTPro is not standing for 10 bit but the "Packed" codec. I may be
> > > > wrong but given we capture 8 bit I think it is QTPro misrepresenting
> > > > the codec.
> > > >
> > > > --- In Avid-L2@yahoogroups.com <mailto:Avid-L2%40yahoogroups.com>,
> > > > "Job ter Burg (L2B)" <Job_L2@> wrote:
> > > > >
> > > > > Huh? 1:1x is not 10-bit...?!
> > > > >
> > > > > On 17 nov. 2012, at 05:48, "johnrobmoore" <bigfish@> wrote:
> > > > >
> > > > > > This is an Avid 1:1x media, the x for packed not 10 bit
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
>

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