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Of Frame Rate and Time Base


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#1 Vivek Venkatraman

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Posted 22 February 2016 - 08:24 AM

Hey,

 

So I am facing a small problem on a project I recently shot on the Sony A7s 2.

 

The film is a combination of 24 FPS shots as well as some 100 FPS shots - the issue is that with every 100 fps shot the time base in the camera changes to 100 as well.

Now my editor is stuck with 2 different time bases of 24 and 100 respectively and claims that it is a problem to edit such footage as AVID sets one timebase for the entire sequence ?

Somehow I remember testing this out on adobe premiere and it worked fine..

Is there a work around for such an issue ?

Will there be a problem for me in the conforming process ?

 

Thank you for your help :)

 

 


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#2 Satsuki Murashige

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Posted 22 February 2016 - 04:09 PM

In Premiere you can select a new timebase for an individual clip by right-clicking on it in the media browser and selecting:

Modify>Interpret Footage>Assume this frame rate [23.976].

It will help if you separate the media on your hard drive into a 23.98fps folder and a 100fps folder. That way, when you import the 100fps folder you can 'select all' and change the clip properties all at once instead of one at a time.

Don't know if Avid can do this but in the worst case scenario, just put all the 100fps footage on a 23.98 timeline in Premiere, reset all the clips to 23.98, then transcode to a codec of your choice (Prores, DNxHD, etc.) and just deliver those.
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#3 Vivek Venkatraman

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Posted 22 February 2016 - 06:00 PM

Thanks Satsuki

 

Thats helpful


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