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Different framerate issues
Hi everyone,
Yet another topic on matching frame rates. Searching the forum I found answers to some of my questions, but still I haven’t been able to figure out the best way to go for my case.
I have some footage with different frame rate, 50% at 23.98 fps and 50% of it at 25fps. It actually doesn’t matter whether my final export is at 23.98 fps or 25 fps.
The footage shot at 23.98 was shot with a better camcorder and overall it’s the footage with the best quality, thus I would be happy not to compress it and leave it at the same frame rate (23.98).
The quality of the rest of the footage instead is not as good (although still HD 1980×1080). and I thought I could conform its 25fps to the 23.98fps of the rest (either with compressor or with cinema tools). Eventually I’d have all the footage at 23.98 fps.
However, I feel that it might work better to do it the other way around and conform the footage at 23.98 to 25fps.
Considering the tools I have available (Compressor and Cinema Tools), which way would you suggest me to go?
Thank you very much
Regards
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16 Replies
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compressor will take a long time, and might not look so great
CInemaTools is instantaneous looks good but wil alter your payback speed, and audio pitch.if these are for multi clipping, or if sync between the cameras is important, then Compressor is the only way.
using CinemaTools, if you have the same people on both cameras, then the change in audio pitch will be a bit disturbing, but isn’t insurmountable.
with not very good pitch correction in FCP, it is a genuine “fix it in the mix” situation..nick
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As Nick says.
Conforming (CinemaTools), do not process the picture, so whatever option you chose you will end up with the same original quality.
Compressor only makes a real Conforming when you chose the “Rate Conversion: Fast (Nearest Frame)”. Any other option will process the image.
rafael -
I haven’t used Compressor to do this myself.
Rafael, the “Rate Conversion: Fast (Nearest Frame)” option,
does that just drop or repeat frames to make up the difference?
simply dropping the shot into a miss=matched FCP timeline will do the same thing.nick
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[Nick Meyers] “Rafael, the “Rate Conversion: Fast (Nearest Frame)” option,
does that just drop or repeat frames to make up the difference?
simply dropping the shot into a miss=matched FCP timeline will do the same thing.”
No if you set “Set duration” other than 100%.
If you set:
– 24@25
– 23,98@24
– etc
you do not drop, don’t add any frame, you get a plain Conforming of the file.
rafael -
Thank you guys for your help. I was actually going to do a multiclip thus it seems that I’d better use Compresor for this. However, I am not really concerned about altering sound as I have a separate audio file I will synch to all my footage.
Would there be any difference conforming 23.98 footage to 25fps footage and conforming 25fps footage to 23.98? Any particular reason that you know for which I should prefer one way over the other?
Thanks
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[Davide Marchesi] ” I was actually going to do a multiclip thus it seems that I’d better use Compresor for this. However, I am not really concerned about altering sound as I have a separate audio file I will synch to all my footage.”
Wait, wait!!
If you intend to sync audio with files that have been conformed, the audio will end up slipping out of sync because video won’t be playing anymore at the original speed.
rafael -
Right, thanks Rafael, I didn’t realise I was missing that step. What other solution am I left with then?
I am clearly starting to think that I should use the 25p conformed footage as little as possible in my final edit, but I might still need a few clips from it.
Would it be possible to slightly speed up the footage after conforming it? I feel that it’d just be a big mess…
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you have to run it though compressor and do a frame rate conversion.
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[Davide Marchesi] “Would it be possible to slightly speed up the footage after conforming it? I feel that it’d just be a big mess…”
Right.
You will mess everything and you won’t achieve the main objective of conforming, that is to not process the footage.
As Nick says, retime the p25 to p23,98 in Compressor and avoid audio syncs issues.
rafael -
Thank you guys, I must have misunderstood Rafael’s post because I was going to use Compressor but I thought that with workflow I would jeopardize my chance of synchronizing the audio. So conforming with Cinema Tools is going to present me with an audio synchronization problem, but not Compressor right?
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