PieroF

Q: Compound & Multicam Clips Rendering

Hello,

I got into a problem with my project made of a sequence of compound clips, each built on a multicam clip with 4 angles. In some cases (fortunately not many) a change in the multicam clip is ignored by the compound clip, which doesn't show the orange rendering line, and doesn't render at all; not only: even sharing the outer project ignores the change in the multicam.

So far the only workaround I found is to delete all render files (at least those of the affected project) and then both rendering and sharing become aware of the change I made.

Even if for sharing this is not such a big issue (as long as I remember to first delete the render files), it is very annoying during editing, because I get confused about what is actually the result of those changes in the compound and in the project...

 

Thanks Piero

 

Running FCPX 10.2.3 on El Capitan and iMac 27" late 2013, 16 GB RAM, almost 1TB available space on disk

Input clips: H.264, AAC, 1920x1080 30p, stereo 48 kHz

iMac, OS X El Capitan (10.11.6), FCP X 10.2.3 - Canon HF M56 PAL

Posted on Sep 16, 2016 10:55 AM

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Q: Compound & Multicam Clips Rendering

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  • by BenB,

    BenB BenB Sep 17, 2016 3:04 PM in response to PieroF
    Level 6 (9,941 points)
    Audio
    Sep 17, 2016 3:04 PM in response to PieroF

    Are you putting Multicam Clips inside of Compound Clips?  I certainly hope NOT!  That is a recipe for disaster!

     

    Go to the Final Cut Pro X menu, to Preferences, to Editing, and turn Background Rendering the heck OFF.  Render manually (Command-Shift-R) only when you have to for playback.  I'd also delete all render files for the whole Library to be safe.  PLUS, re-lauch FCPX while holding both the Option and Command keys together.  When prompted, chose to delete Preference files.  Then move on with your work.

  • by PieroF,

    PieroF PieroF Sep 18, 2016 12:58 AM in response to BenB
    Level 5 (4,283 points)
    Video
    Sep 18, 2016 12:58 AM in response to BenB

    Thanks for your reply.

    In fact this is my second major project (3 hour) where I use multicam clips in compound clips. In the previous one I never had this issue.

     

    In the current one this issue occurs when I do just a bit more than (manually) synchronizing clips: eg. I used blade to remove a short portion of clip in one angle, and added a transition to it. Then:

    - everything is ok in the angle viewer

    - the multicam clip re-renders as expected

    - the compound clip including multicam, and the project including this compound seems to behave erratically: sometimes the render bar appears and everything works as expected; sometimes not: and then I have to find a trick to force rendering in the compound, in the project and in the share...

     

    Tricks that worked: make some other change in the affected angle (eg. do a simple "blade speed" without any speed modification), or delete render files.

    Manual render doesn’t work because FCPX believes there is nothing to render (no orange bar).

     

    Now I’ll try your proposal: turn background rendering off, and possibly delete preferences.

     

    However I don’t understand why the problem affects sharing as well: I thought rendering was only for playback (right ?) and sharing would render from scratch. Why deleting all render files makes sharing behave ?

     

    Thanks!

    Piero

  • by BenB,

    BenB BenB Sep 18, 2016 6:50 AM in response to PieroF
    Level 6 (9,941 points)
    Audio
    Sep 18, 2016 6:50 AM in response to PieroF

    WHY are you putting Muticams inside of Compounds?  What is the purpose?  That's not a good idea to do.

     

    Corrupted render files can in some cases effect export.  Export can sometimes read off of established render files.

     

    When manually rendering, be sure NOTHING in the Timeline is highlighted, and Render All (cmd-shift-r).

     

    But I'm baffled as to why you have Multicam clips inside of a Compound?  Seriously, what is that achieving?  If you have a purpose, I'm sure there's an easier way to achieve it.

  • by PieroF,

    PieroF PieroF Sep 18, 2016 7:31 AM in response to BenB
    Level 5 (4,283 points)
    Video
    Sep 18, 2016 7:31 AM in response to BenB

    It was my choice to make a "modular" project.

     

    My overall movie is made of 4 .mp4 files created each from a separate 40 min project (this to keep each file under the 4GB limit).

     

    Each of my 40 min project has more or less 100 switches between its 4 different angles.

    I cannot handle this with a single multicam clip: my synchronization is manual and requires lot of fixing by trial and error to get the best result for each switch. Much better to work on shorter clips.

    So I decided to split this 40 min multicam into 6 sections of 6-7 min each; to me an obvious solution was to use a compound clip for each section, for clarity. Having the 6 multicam in a sequence into the project is confusing: I want to give a name to each section and check and fix it separately from the others, and edit them into the final project only when they are all ready for sharing.

     

    Now I learn from my experience and from your post that compound clips have problems with multicam... too bad! For sure I can survive without them, editing all multicams in sequence into the project, but I believe their reason to exist (as for sequences in the old FCP 7) is exactly to make modular projects.

     

    Do you agree with my point ?

    Thanks

     

    Piero