Re: [Avid-L2] DVCPro HD (720P/60), 23.98 ama link 2,2,2,4 Pulldown Transcode 2,2,2,2,2?

Thanks for that....had no idea that was what determined the transcode
method.

On Wednesday, April 17, 2013, Mark Spano wrote:

> **
>
>
> It only matters what your "Field Motion" is set to per clip in the bin. If
> you're in a 29.97i project, and you AMA link to a 23.98 clip, and Field
> Motion is set to Progressive, the motion adapter will be correct (2:3
> pulldown). If the Field Motion is set to Interlaced, or Unknown, the motion
> adapter makes a guess and the guess is wrong (usually blended something).
>
> John, if you were in a 29.97p project, the motion adapter would see
> source:progressive, output:progressive, and most likely set to blended
> interpolated. In other words, creating progressive frames that did not
> exist in the source.
>
> Always check Field Motion before transcoding. It is usually guessed
> correctly with Avid-native codec stuff like P2 / XDCAM, and usually guessed
> wrong with everything else.
>
> On Wed, Apr 17, 2013 at 9:00 AM, electropura212 <electropura212@gmail.com<javascript:_e({}, 'cvml', 'electropura212%40gmail.com');>
> >wrote:
>
> > Had issues with this last year.
> >
> > Noted that doing the AMA link/transcode in a 23.98 project, then moving
> the
> > bins into the 1080i 29.97 project achieved noticeably better looking
> > results. The motion adapter applied in the 29.97 project handled the
> > pulldown differently (and better!). Better still, it's not baked in...you
> > can adjust it by promoting to Timewarp if it gets the cadence wrong.
> >
> > I think transcoding while converting frame rate is using Advanced
> Pulldown,
> > which is really not so nice.
> >
> >
> >
> >
> >
> > On Wednesday, April 17, 2013, johnrobmoore wrote:
> >
> > > **
> > >
> > >
> > > Well in 1080i the transcodes generate 2:3 pulldown like I would expect.
> > So
> > > what methodology is Avid using when I did the transcodes in
> 1080P/29.97?
> > Is
> > > it a fluid motion algorithm? If so does it lead to some of the
> potential
> > > artifacts that fluid motion can generate? Just how is Avid making 5
> > > seemingly unique psf frames from the original 24 frames of the ama
> clip?
> > > Hmmmmm.
> > >
> > > --- In Avid-L2@yahoogroups.com <javascript:_e({}, 'cvml',
> 'Avid-L2%40yahoogroups.com');> <javascript:_e({}, 'cvml',
> > > 'Avid-L2%40yahoogroups.com');>, John Moore <bigfish@...> wrote:
> > > >
> > > > So in my P2 extravaganza tonight I see something that I think I only
> > > partially understand. When I look at ama linked DVCPro HD (720P/60)
> > 23.98
> > > clips and set my project to 1080i/59.94 I see a cadence of 2,2,2,4 but
> > when
> > > I look at the transcoded clips that are
> > > >
> > > > p, li { white-space: pre-wrap; }
> > > >
> > > > DNxHD 220 (HD1080p) and step field by field I see a 2,2,2,2,2 cadence
> > > not 2:3. Is this some magic happening in the transcode because all 5
> psf
> > > frames are unique. Could I be getting fooled by the fact that I did the
> > > transcodes while having the project set to 1080P/29.97. It's late but I
> > > don't see any split frames as I step through field by field. I'm going
> to
> > > redo the transcode while in 1080i/59.94 mode and see what happens then.
> > > >
> > > > John Moore
> > > >
> > > > Barking Trout Productions
> > > >
> > > > Studio City, CA
> > > >
> > > > bigfish@...
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> >
> > Search the official Complete Avid-L archives at:
> > http://archives.bengrosser.com/avid/
> > Yahoo! Groups Links
> >
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>
>
>


[Non-text portions of this message have been removed]



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