Having had an ailiasing/interlacing 'mare last time after working with various 3D file imports and DV captures [http://community.avid.com/forums/p/59085/331183.aspx#331183}. I am now trying to stick to only DV25 and am importing all other material with EVEN (lower field first) as the import setting.  Already its not looking that promising - but burning a DVD (or buying a Mojo!) would help tell further down the line I guess...

Thing is I have some stunning 3D photorealistic modelling being done and I want to import these sequences of TIFF's at a higher than DV res to get better colours.  However I am scared to do so in case I get ailiasing nightmares as per last time (and last thread!).

Can anyone advise from experience here if it is OK to mix PAL DV25 (from tape) with say a nice MPG50 res (of imported stills) on same timeline with a view to outputting to DVD in the end?

Thanks

D

PAL 625 SD project on MC3

Transcode all your DV25 to DV50.  From then on everything will be the same field dominance.

 You could work in 1:1 for all material and that would insure best quality. If for some reason you need to work in DV25 make sure all material is mixed down to that format before exporting, personally I would favor working in 1:1.

Importing with lower field first to MPG50 will not make it lower field first it is just the way it will interperate the footage on import.  

if the supplied video is upper field first and you import is as lower field then that will give you issues immediately.

If you are not monitoring it on a interlaced monitor then enter effect mode and use the arrow keys to go through the footage field by field, if field 2 looks as though it is back in time from field one the footage has been imported with the incorrect field order. 

Thanks guys, 

This is bad news: "Importing with lower field first to MPG50 will not make it lower field first it is just the way it will interperate the footage on import." I thought I already had problems...

I think I will have to unpick and re-create all the DV25 captured stuff (complex layered treated moving backgounds) and transcode to a higher res.  This also incudes dozens of Marquee animated captions (yes someone does use it ;) ). What a total and utter PITA!!!!!

D

 Shouldn't be a PITA. On the Avid timeline everything is bottom field first in NTSC. Upper field DV25 is padded with a black line at the top to make it bottom field - just import the upper field footage with the upper field option. Exporting a timeline of mixed DV25 (480 lines) and full 486 line video can cause problems in a QT reference file. Best is to make a complete mixdown to 486 MXF format. Again - keep in mind that DV footage is 480 lines and you will see some black on top and bottom on the Avid timeline which is 486 lines.

 Never mind what I just said - i c you are doing PAL and I don't understand why you are having a problem there as long as your footage is imported with the correct field order...

DIESELE:

This is bad news: "Importing with lower field first to MPG50 will not make it lower field first it is just the way it will interperate the footage on import." I thought I already had problems...

Before you panic, try what I suggested.  If you've already created your edit, clip out a small section and transcode that sequence.  Drop in some of your animation and field step through the sequence.  The command palette has the field-step commands, which I have mapped to the shifted right and left arrow keys for convenience.  If your problem is solved field 2 (shown by a small "2" at the top right of frame) will never go backwards as you step forwards.

You may be agreeably surprised at the result.

If your problem has been corrected by that process, transcode the whole sequence.

Guys - really appreciate this info - surely enough to let me sort it.

Usefully MC3 has a 'delete all renders' command.  Since almost all my timeline has an effect applied (and particularly the captured DV25 stuff which has motion effects/bump maps/colorisation etc) I deleted all renders and re-did them in DV50 upper field first. I'm hoping this is equivalent to a transcode command?   New material will also be imported as DV50 upper field first and I will hope to find existing DV25 lower field first imports and batch import them now as as DV50uff.

Finally (and I hope this will help anyone of us regularly in this annoying and continuing problem) I would be totally happy to drop a film field effect on the whole timeline from Sapphire or a de-interlace from Boris maybe.  That should fix it with MINIMAL 'hard labour' unpicking to re-do and correct clips????

Cheers

D

So far so good & now I'm onlining...  But, when I pop a Boris CC effect on it I get MASSES of interlacing errors - destroys the picture really.  A std matte key using Avid works fine, but when I use Boris to do it it all goes pear shaped - the whole picture ends up sawtoothed. Doesnt seem to be any field dominance options in Boris (e.g BCC Glint).

I am working in DV50 and have imported everything UFF.  PAL DV 25 video is rendered out as DV50.

What a palaver this field dominance is (and now i notice how many inadvertantly get it wrong whilst  watching TV!!)

Any suggestions guys - or i'll have to drop the Boris effects otherwise.  The nice 'glow in' matte keys would have been nice though - once I worked out you DONT hold the ALT key when dropping them on.

D

Whatever I do to V1 with a Sapphire film effect (lose a field/make lower field dominant etc) when the Boris is placed above on V2 there is a small V line shift and immediate ailising/wrong interlace on V1.  Not good on expensive 3D!  There is no setting in media creation for field order - why is this happening ohh Boris!?  This is DEFINITELY happening on DV50 UFF material - TIFFS imported from 3D

Thanks for any advice as I deliver tomorr

D

In case it helps anyone else tearing their jittery hair out I can confirm that the Boris Lens Flare effect screws up your PAL field dominance.  I tried using it today in a facility on SDI captured footage of definite correct field dominance - it immediately caused jitter on my lovely leaderboard.  The Sapphire lens flare used instead worked fine.

D