Latest post Wed, Mar 5 2014 8:47 AM by jwrl. 5 replies.
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  • Wed, Mar 5 2014 12:06 AM

    • S.Clements
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    'Cinema Tools'-style Speed Conversion Functionality To Fix Varying FPS Sources

    Sometimes, editors need to incorporate 24fps footage in a 25fps Avid sequence.  Avid can interpolate frames to make 24fps footage play at 25fps, however there are ghosting issues with this approach and Avid's fluid motion technology often creates artifacts.  Using FCP's Cinema Tools program to speed convert source clips to 25fps preserves the integrity of the images and is a third party software reccomended as a workaround by moderators on these forums.  Avid should have a similar technology for properly incorporating varrying speed footage.  Frame interpolation is just not good enough.  It would also be good to have tools to automatically fix the pitch of the audio speed changes that also occur, to make them sound correct.

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  • Wed, Mar 5 2014 2:55 AM In reply to

    Re: 'Cinema Tools'-style Speed Conversion Functionality To Fix Varying FPS Sources

    The technology is already there.

    "Promote" the Motion Effect and adjust the settings accordingly.

     

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  • Wed, Mar 5 2014 5:11 AM In reply to

    • S.Clements
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    Re: 'Cinema Tools'-style Speed Conversion Functionality To Fix Varying FPS Sources

    Dom Q. Silverio:

    The technology is already there.

    "Promote" the Motion Effect and adjust the settings accordingly.

     

    Hi, Dom.  Unless I'm missing something, it appears as though you can only produce interpolated frames using this method. Several key admins on this site recommend the cinema tools worklow to ensure your footage is actually running at true 25fps.  I can't get the footage to look right using the interpolated frames (controlled via the motion editor).

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  • Wed, Mar 5 2014 7:19 AM In reply to

    Re: 'Cinema Tools'-style Speed Conversion Functionality To Fix Varying FPS Sources

    I'm teaching an editor today in a one to one class and one of the topics they've raised is bringing in hi spped footage to use in slowmo mode.

    So I'm now faced with having to show console commands to attempt either an AMA link or import ignoring frame rate. Or modifying the frame rate exernally first (cinema-tools style) which won't be easy as it's MXF media.

    This will be another example of making something editors think should be simple be exposed as less than straightforward.

    All we need is an option to force frame for frame handling or better still an option to override the source frame rate on ingest so you can force MC to handle the ingest in a certain way. And that option not be a console command. And that it works.

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  • Wed, Mar 5 2014 7:34 AM In reply to

    Re: 'Cinema Tools'-style Speed Conversion Functionality To Fix Varying FPS Sources

    S.Clements:

    , it appears as though you can only produce interpolated frames using this method. 

    no, if you change the motion adapter to 100%, it will play frame-by-frame, without blending or interpolation.

    Here's a whitepaper on 24<->25 conversions http://www.jobterburg.nl/Publications/TVScenes_25_24.pdf.

     

    An easier method to go about this has been on my list for quite a while. Premiere has an 'Interpret As' function tbat lets you do stuff like this inside the editor.

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  • Wed, Mar 5 2014 8:47 AM In reply to

    • jwrl
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    Re: 'Cinema Tools'-style Speed Conversion Functionality To Fix Varying FPS Sources

    "Interpret As..." is a feature I would kill for.  I've been used to it in AE for years and have always missed it in MC.  And while I haven't used it in Premiere, in AE you can save your current interpretation and load it on mutliple clips.  That would be a handy feature too.

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