Latest post Wed, Feb 15 2006 9:30 PM by Todd Sanderson. 11 replies.
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  • Thu, Feb 9 2006 3:59 PM

    • mf_edit
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    Exporting

    I have run into several problems exporting from the Avid to create DVD's. I finally narrowed down to using Sorenson Squeeze 4 and have fine tuned the settings in there, but I continue to have a problem when exporting. Mainly there is a field/interlacing issue that causes the video to play back with the field lines showing during any kind of motion.

    I have tried multiple combinations of settings and still get the same results. It appears that once I Squeeze the file the problem goes away, but I want to make sure that it will be consistent for every clip.

    Has anyone else experienced this and know what to do, or if it is not an issue, or what settings may be off and causing it?

    Thanks
  • Thu, Feb 9 2006 4:02 PM In reply to

    • xyedit
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    Re: Exporting

    Where are you seeing the problems?

    If you're watching on a computer monitor you will see interlacing because computer monitors are non-interlaced.   If you play back on a TV, then they will appear fine if the field order is correct.

     

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  • Thu, Feb 9 2006 5:10 PM In reply to

    Re: Exporting

    Also make sure you are not mixing video resolutions on a project. If you have clips at 1:1, 3:1, ect mixed with DV footage you need to flatten everything before you export.

    If you are NTSC export lower field first.
    MCA Macintosh 2.7, Mac 10.4.9 G5 dual 2GHz. Lots of RAM. [view my complete system specs]
  • Mon, Feb 13 2006 3:04 PM In reply to

    • mf_edit
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    Re: Exporting

    It is in a TV monitor, on finished DVD's that I am seeing the problem. I have played with settings all the way down the line, but continue to see the issue in Sorenson when I do a split screen looking at my exported file, so I am pretty sure the problem is happening as I come out of Avid.

    I have tried this with flattened tracks and non flattened with the same issue, also using lower field and still getting the same results.
  • Mon, Feb 13 2006 3:23 PM In reply to

    Re: Exporting

    What is the source footage? DV25, 3-1, 2-1, 1-1, etc.?  I have had this issue with DV25 footage.  My solution was to do a video mixdown of the sequence and also convert the footage to 2-1.  That did the trick for me.

    HTH,
    Todd
    MC 2018.9, Blackmagic UltraStudio 4K, 12-Core MacPro, 64 GB RAM, 24 TB Thunderbolt Storage [view my complete system specs]

    Conformity is the jailer of freedom and the enemy of growth. Motion Inc

  • Mon, Feb 13 2006 4:03 PM In reply to

    • mvegas
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    Re: Exporting

     Todd Sanderson wrote:
    What is the source footage? DV25, 3-1, 2-1, 1-1, etc.?  I have had this issue with DV25 footage.  My solution was to do a video mixdown of the sequence and also convert the footage to 2-1.  That did the trick for me.

    HTH,
    Todd

    Curious about that technique.  DV media is native 520 x 480, all other is 520 x 486.  Wouldn't you soften the DV media during the mixdown as you are adding additional scan lines to existing media?

  • Mon, Feb 13 2006 4:35 PM In reply to

    Re: Exporting

    Perhaps... a few things though.  I digitized the footage at 720x486 to begin with, even though I was using the DV25 codec.  I had a very long, low budget project, and was nearly out of drive space as well.  The footage was shot on DVCPro50, which is 720x486 I believe.  I digitized it using the DV25 codec to save space.  I left the video input settings at 720x486 though.  Does the DV25 codec override the 720x486 input settings?  When I was done, I exported sixteen 5 minute QT's for DVD encoding.  4 of them ended up showing the same issues being described in this thread.  I went back and mixed them down to 3-1 and all 4 were fixed.  If there was any softening, it was indecipherable to my eye, when compared to the other 12 files.  This was awhile ago and was also the only time I experienced this issue.  Reconsidering now, I realize I may have tainted the footage from the get go by capturing it this way.

    Todd
    MC 2018.9, Blackmagic UltraStudio 4K, 12-Core MacPro, 64 GB RAM, 24 TB Thunderbolt Storage [view my complete system specs]

    Conformity is the jailer of freedom and the enemy of growth. Motion Inc

  • Mon, Feb 13 2006 7:02 PM In reply to

    • mf_edit
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    Re: Exporting

    <BLOCKQUOTE><table width="85%"><tr><td class="txt4"><img src="/exchange/Themes/default/images/icon-quote.gif">&nbsp;<strong>Todd Sanderson wrote:</strong></td></tr><tr><td class="quoteTable"><table width="100%"><tr><td width="100%" valign="top" class="txt4">What is the source footage? DV25, 3-1, 2-1, 1-1, etc.?  I have had this issue with DV25 footage.  My solution was to do a video mixdown of the sequence and also convert the footage to 2-1.  That did the trick for me.<br><br>HTH,<br>Todd<br></td></tr></table></td></tr></table></BLOCKQUOTE>

    Everything being used is 1:1, coming in component from digiBeta. I have even re-imported so evertything is one track of video and 2 tracks of audi completely mixed, and then tried exporting that and that is where I keep getting these lines. I am worried that reducing the resolution will hurt the quality of the spot, but I can give that a try.
  • Mon, Feb 13 2006 9:52 PM In reply to

    Re: Exporting

    If everyhting is 1-1, I would not mixdown to 3-1.

    You said you are exporting lower field first.... are you also encoding your m2v files lower field first?
    MC 2018.9, Blackmagic UltraStudio 4K, 12-Core MacPro, 64 GB RAM, 24 TB Thunderbolt Storage [view my complete system specs]

    Conformity is the jailer of freedom and the enemy of growth. Motion Inc

  • Mon, Feb 13 2006 9:59 PM In reply to

    Re: Exporting

    One way to test whether the issue is with Avid or Sorenson, is to create the m2v file using QT Pro, rather than Sorenson.  If you can create a good, non-interlacy m2v file using QT, then the exported file is OK and the issue lies in Sorenson.  I use Bitvice, so I'm not clear on Sorensons nuances unfortunately.
    MC 2018.9, Blackmagic UltraStudio 4K, 12-Core MacPro, 64 GB RAM, 24 TB Thunderbolt Storage [view my complete system specs]

    Conformity is the jailer of freedom and the enemy of growth. Motion Inc

  • Wed, Feb 15 2006 8:55 PM In reply to

    • mf_edit
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    Re: Exporting

    I have set everyhting to lower field (and every other combination thereof) and stil have the problem.

    Also, just tried the Quicktime export and still get the problem, also get the problem in Compressor, and BitVice, so I am pretty sure it is in Avid that the issue is being caused. Playing back in the timeline is always fine, and playing out of Avid into a DVD recorder and creating a DVD that way looks and plays fine. It is only when exporting from the timeline out of Avid that this issues appears.

    Also, we have 2 Avid Adrenalines here and we have tried exporting from both systems and we still get the issue. Again it is not every single time, but certain sequences do it. We have tried re-importing from tape and the same spot will have the same issues. So we are pretty puzzled here as to what the variable could be, unless it is wrong coming in, but somehow going through the Avid box the problem is corrected, as opposed to just exporting from the program. The Avid box itself is the only other variable I can think of, although everything looks fine in my program monitor, but I do see the problem in Quicktime, so I know the computer monitor is not compensating.
  • Wed, Feb 15 2006 9:30 PM In reply to

    Re: Exporting

    So on these certain problem sequences... is the entire sequence bad or only a certain number of specific shots?  If the latter, are there any variables about those shots that a different from the good shots?  Different tape stock, decks, captured differently, etc...

    Have you tried creating a new project and moving the bins over, just in case the project is corrupted?  Also, try trashing your MCSTATE and perhaps the mdb files on your Avid drives. 

    MC 2018.9, Blackmagic UltraStudio 4K, 12-Core MacPro, 64 GB RAM, 24 TB Thunderbolt Storage [view my complete system specs]

    Conformity is the jailer of freedom and the enemy of growth. Motion Inc

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