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Converting 25 fps to 30fps

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Brad Mirman
Converting 25 fps to 30fps
on Aug 16, 2010 at 6:15:54 pm

I just shot a little commercial on my Canon 7D at 1020x1080 30 fps. I found a piece of stock footage that would be great for it but it is only available at 25 fps. Is there anyway to convert to use in my sequence?


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Shane Ross
Re: Converting 25 fps to 30fps
on Aug 16, 2010 at 11:52:12 pm



Use Cinema Tools to conform from 25fps to 24fps. Then use Compressor to convert 24fps to 29.97fps.

23.98 to 29.97 via Compressor:

1. Drop clips you want to convert into Compressor

2. In Compressor, select your video then right click and choose NEW TARGET WITH SETTING > APPLE > FORMATS > QUICKTIME > APPLE PRORES 422 (HQ). Or pick whatever codec you like to work with.

3. Click on that newly created compression setting to open it in the Inspector window. Click the Encoder tab. Click the Video: (Settingsā€¦) button. Make the frame rate 29.97. Check the interlaced box. Set it's drop down menu to Bottom field first. Click OK.

4. Click the Frame Controls tab. Set Frame Controls to On. Set Output Fields to Bottom first. Leave Deinterlace on Fast. Leave Adaptive Details checked. Leave Rate Conversion set to Fast. Leave the Set Duration to: on 100% and make sure it's radio button is selected and NOT the "so source frames play at 29.97 fps" button.

5. Make changes to the Filters or Geometry sections as needed. Those settings listed above are the ones critical to getting the proper 3:2 pulldown added.

6. Submit the compression, then bring the resulting video back into Final Cut Pro. Place it in a 29.97 timeline and make sure you watch it on an NTSC monitor to verify that it looks good. If you step through it frame-by-frame you should see the familiar pattern of 2 split/interlaced frames followed by 3 whole frames. This is a very important step. I tried many solutions that looked OK playing back on the computer monitor, but looked terrible on the NTSC monitor.


Read my blog, Little Frog in High Def

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Brad Mirman
Re: Converting 25 fps to 30fps
on Aug 17, 2010 at 10:59:29 pm

Thanks so much.

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