Latest post Mon, Jan 30 2012 6:05 PM by slabross. 6 replies.
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  • Wed, Jan 4 2012 7:16 PM

    • Scott_L
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    Cache FX on linked clip...

    Seems to me that in previous release of DS (Pre V10) that if you linked to a clip, pkaced it on the timeline and added a cache FX and then removed the original source from the system, the cache would allow the clip to be playable as the cache file was not removed, only the source... has this changed?

     

    Thanks-

    Scott

  • Mon, Jan 9 2012 8:39 PM In reply to

    • slabross
    • Top 150 Contributor
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      Moderator: Avid DS

    Re: Is it me? Cache FX on linked clip...

    I tested a Linked clip with Avid DS 10.5.2, processed as a cache, and then I deleted the source linked file. The DS clip retains its cache association, even after adding more effects and processing them.

    Or maybe you are doing something differently? In that case, please send me your steps so I can try.

    Sylvain Labrosse
    Principal Expert | Services and Customer Success

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  • Tue, Jan 10 2012 10:43 PM In reply to

    • Scott_L
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    Re: Is it me? Cache FX on linked clip...

    O.K., just tried it again.  Here's my steps:

    -Linked to a 720p clip 23.98

    -put it on a 525 NTSC timeline (Holding down F while placing on timeline)

    -did a 3:2 expand on the video clip to add pulldown and proper sync to audio

    -dragged audio out to match new length

    -placed a DVE on clip to size to SD NTSC

    -rendered all

    -placed a cache on video and audio clip and rendered (audio this time)

    -saved sequence

    -quit DS and removed drive

    -re-opened DS and no media!

    let me know what you find...

    -Scott

  • Thu, Jan 12 2012 9:50 PM In reply to

    • slabross
    • Top 150 Contributor
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    • Montreal, Quebec, Canada
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    • Avid Employee
      Moderator: Avid DS

    Re: Is it me? Cache FX on linked clip...

    Ok, I see the problem with this workflow.

    The source clip relies on a linked file that is physically removed from the system, so it becomes offline. Even if you add and process a cache associated to the clip, the linked media is gone and the clip goes blank when you reopen the sequence.

    May I propose that you alter your workflow this way :

    Instead of adding a cache, select the clip, click Generate and instead choose Timeline to Clip.

    Note that I also used the Replace Selection option so the linked clip and effects get replaced in the timeline by the newly created single clip.

    Now I can save, exit DS, reopen the sequence and the media remains online. This is because the clip no longer links to a "volatile" linked file but to a local media in the storage.

    Sylvain Labrosse
    Principal Expert | Services and Customer Success

    Avid
    3510 St-Laurent Boulevard
    Montréal, QC H2X 2V2
    Canada
    sylvain.labrosse@avid.com

    Create cases online now at  csportal.avid.com 
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  • Tue, Jan 24 2012 9:39 PM In reply to

    • Scott_L
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    Re: Is it me? Cache FX on linked clip...

    Got your suggestion, but I'm curious... I thought the point of generating a cache file is so that DS renders it to a local .gen file, and then references that cached .gen file no longer requiring the original as it has process a "new" version of that clip.  Is that not the case?

    Thx-

    SL

  • Wed, Jan 25 2012 8:16 PM In reply to

    • Scott_L
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    • Joined on Wed, Oct 26 2011
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    • Points 170

    Re: Is it me? Cache FX on linked clip...

    Interesting tidbit...  I just did another test, pulling a 23.98 clips from a thumb drive, linking to it, adding 3:2 pulldown to it in a 1080i 59.94 sequence, added cache FX and rendered all... then I pulled the thumb drive from the system containing the original linked file.  DS was still happy, would play out etc.  I closed and re-opened the sequence, then the material was gone... so it does appear that DS can use the cached file...  just a DS code programming item to consider... seems it doesn't "really" need the original file to be there after caching can just link to the cached file?

    SL

  • Mon, Jan 30 2012 6:05 PM In reply to

    • slabross
    • Top 150 Contributor
    • Joined on Thu, Oct 13 2005
    • Montreal, Quebec, Canada
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    • Avid Employee
      Moderator: Avid DS

    Re: Is it me? Cache FX on linked clip...

    Yes and no.  Cached media is volatile because it can be purged at any time and you need access to the source media to recapture or relink, thus generate replacement media.

    Avid DS works differently from how you imagine it does.  So even though DS uses one or many caches once processed, you cannot discard the original master media, captured or linked.

    The code architecture is complex because when Avid DS processes minimal or complete, cache layers can be reused or they must be reprocessed fully, and then the need to again use source media is mandatory.

    And there are many other architectural reasons imposing this rule.

    Sylvain Labrosse
    Principal Expert | Services and Customer Success

    Avid
    3510 St-Laurent Boulevard
    Montréal, QC H2X 2V2
    Canada
    sylvain.labrosse@avid.com

    Create cases online now at  csportal.avid.com 
    It's fast, easy and effective!

    We're Avid.  Learn more at www.avid.com  

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