This IS the Avid L2: Re: [Avid-L2] 100 v 145

Tuesday, October 16, 2012

Re: [Avid-L2] 100 v 145

For a decent codec comparison I like Marco Solorio's technique - using a
test pattern and moving images then comparing results via AE difference
matte.
http://codecs.onerivermedia.com/testing.htm

Of course there are PQR and such but this is something most of us can do.

Dom Q. Silverio

On Tue, Oct 16, 2012 at 1:34 PM, Curtis Nichols <curtisnpcs@sbcglobal.net>wrote:

> I set up some tests using Sapphire Math_Ops set to subtract.
> Test 1: XDCAM35 versus DNxHD 100 : very little difference, not easily
> seen on video monitor. Spikes on the scope are in the 1-2 IRE range.
> Test 2 & 3: XDCAM35/ DNxHD 100 versus DNxHD 145 : edge detail differences
> are easily seen; 20+ IRE.
> Test 4: DNxHD 145 versusDNxHD 220 : less difference than Test 1.
>
>
> The primary content is talking head interviews in a home, and the broll is
> low-action household activity.
> The quality differences are seen on edges of plates and jewelry. Since my
> client is a jewelry company, we'll be using the DNxHD145.
>
> Thanks for everyone's input.
>
>
> Curtis Nichols
> Señor Editor
> PCS Production Co.
> Irving, Tx.
>
> ------------------
>
>
> ________________________________
> From: Greg Huson
> Subject: Re: [Avid-L2] 100 v 145
>
> I'm not sure I agree that 100 is 'good enough.' XDCam35 is NOT 'decimated
> raster, (1440x1080), but rather full raster (1920x1080.) Seems like a
> pretty serious transcode.
>
> Why not just use XDCam35? Unless you're doing lots of layering, or your
> CPU is a dog, MXF-wrapped XDCam35 should work well, and you're not really
> transcoding at all. Yes, XDCam is theoretically not necessarily a good
> editing format, but we've found it works quite well when re-wrapped and
> managed as an Avid-native file. I would, definitely, NOT leave it in AMA,
> but either 'transcode' or import to XDCam35 MXF.
>
> Try it- if you don't like it blame me privately and refuse to ever work
> with me again.
>
> Probably best NOT to set your renders to XDCam35, though, but rather use
> 145 (or better.)
>
>
> [Non-text portions of this message have been removed]
>
>
>
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