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Sequence settings when mixing 25fps (1920x1080) and 50fps (1280x720) ??

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Ricky Gibb
Sequence settings when mixing 25fps (1920x1080) and 50fps (1280x720) ??
on Dec 16, 2010 at 2:48:56 pm

I've got some DSLR footage filmed at different frame rates (25 and 50) and as a result also different sizes (1920 x 1080 / 1280 x 720) compressed as H.264.... can anybody advise me as to what format the footage would edit best in (fastest render times) what my sequence settings (frame rate and frame size) should be in FCP while editing a mixture of both these types of footage? I understand that setting the frame rate at 50 is suitable for slowing 50fps footage down by 50% but would this affect the 25fps footage?

Any help would be brilliant, cheers.


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Paul Jay
Re: Sequence settings when mixing 25fps (1920x1080) and 50fps (1280x720) ??
on Dec 16, 2010 at 4:33:22 pm

Convert All to ProRes422 in original formats.
Then use Cinema tools to conform 720p50 to 720p25 ( half speed, double length)
Then edit all in a 1920x1080 25p ProRes422 timeline.
Your 720 files will be scaled up.

( or edit all in a 720p25 ProRes422 timeline. Then your 1920x1080 footage will be scaled down)


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Rafael Amador
Re: Sequence settings when mixing 25fps (1920x1080) and 50fps (1280x720) ??
on Dec 16, 2010 at 5:05:54 pm

Put everything in a 720p25 sequence and go.

Don't conform any thing.
If you want to slow down some p50 clips, DUPLICATE de clip before conforming (half speed/double length): This operation is "destructive".
Rafael

http://www.nagavideo.com


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Paul Jay
Re: Sequence settings when mixing 25fps (1920x1080) and 50fps (1280x720) ??
on Dec 16, 2010 at 7:09:42 pm

He should convert to ProRes first. Currently he has H264 files.


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Rafael Amador
Re: Sequence settings when mixing 25fps (1920x1080) and 50fps (1280x720) ??
on Dec 16, 2010 at 9:01:06 pm

Yeah.
Sorry I've been to brief.
The faster workflow would be to transcode the H264 files (MPGSteamclip) keeping all setting and drop everything on a 720p25 sequence.
FC will downscale the 1080p25 while converting the 720p50 to 720p25 on the time line (dropping half of the frames).

Another option is to downscale the 1080p25 to 720p25 while you convert the H264 with MPGStreamclip.
I would transcode the 720p50 keeping it as 50, so you can use it for slow-motion if needed.
Again, all that to a 720p25 sequence.
Cheers,
rafael

http://www.nagavideo.com


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Aymeric De Meautis
Re: Sequence settings when mixing 25fps (1920x1080) and 50fps (1280x720) ??
on Jan 3, 2011 at 8:07:22 am

I have the same problem, I have both 25fps and 50fps and wanted to use the 50fps shots for slow motion, but render it all out at 25fps. However, when I dropped the 50fps into a 25fps sequence (which already contained 25fps footage inside it) it was normal speed (at 100%) and when I slowed it down to 50% it looked real choppy, not like slow mo.

Is cinema tools the only way to go? I don't ever remember having to use it, generally when I dropped 50fps into a 25fps the footage would be slow to begin with (twice as long too) and I would have to speed it up 200% for it to be normal speed...


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Rafael Amador
Re: Sequence settings when mixing 25fps (1920x1080) and 50fps (1280x720) ??
on Jan 3, 2011 at 9:22:45 am

[Aymeric De Meautis] "Is cinema tools the only way to go? I don't ever remember having to use it, generally when I dropped 50fps into a 25fps the footage would be slow to begin with (twice as long too) and I would have to speed it up 200% for it to be normal speed..."
Hi Aymeric,
Yes, Conforming is the way to go.
Conforming is a "destructive process". It doesn't degrades the picture, but you can not "Conform back".
SO, NEVER conform original clips, WORK ALWAYS ON DUPLICATED CLIPS.
Use the "Conformed" clips for slow-mow or speed ramps, and the original clip for normal playing.
Best 2011,
rafael

http://www.nagavideo.com


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