Need some help! Made a mistake with multi cam shoot and different frame rates! ughhh

maranfilms

maranfilms

Veteran
Yesterday I was on location shooting with two gh4's, I went through both cams to match settings. However, It appears I didn't enable the frame rate on my A cam to match B cam. So basically I ended up shooting one cam at 23.97 and one at 29.97. Yes a stupid amateur mistake I should have never made. I use adobe Premiere CC 2014, Is there a way to convert the 29.97 footage to 23.97 without throwing off audio. I used a zoom h6 at 48k, which technically should work on either? Or am I mistaken? So what would be the best approach?
1. Just drop the mixed footage on a 23.97 time line and export at 23.97? Let premiere try to figure it out
2. Use Twixter or Magic Bullet frames to convert the footage from 29.97 to 23.97?
3. Use the Adobe conform footage feature (doesn't this method just speed it up or slow it down?)

The shutter speed was the same on both cams, Again I know how incredibly stupid It was to let this happen, especially with the monitor displaying the info. WOW!

I'm so mad at myself over this stupid mistake. Any help would be greatly appreciated!!!! THANKS
 
I have a multi can shoot coming up, and now at your expense glad for the reminder of this very easy to make mistake! So I thank you for posting it.

I agree with trying your options 1 and 2. Premiere might have a nice way of doing the conversion. Twixter would surely work as well.

My only advice right now is test a bit of both methods and see.

Good luck
 
Thanks Dennis! I'm going to do a little experimentation later today. I booked a second day just incase, but the light was magic yesterday. One of those rare day's where everything looked beautiful thanks to mother natures diffusion. I will update with what works the best.
 
I would sync the audio to the 24p stuff, put it in a 24p timeline, then modify the speed of the 30p stuff to be as close to correct as possible and cut it in. The only other way would be to use an external tool to convert the 30p to 24p, might get this done by running through Media Encoder where it should do the reverse telecine "decimation" to bring the 30p down to 24p and keep the total time the same (twixter should work too). If it works properly it should look good, it's just counting and dropping frames in the right sequence to get the job done.

Alternate would be to run both up to 60p and finish at 60p. I would definitely use twixter to interpolate the missing frames here, that way you won't have duplicate frames that can throw a flag at automated QC system in broadcast (if broadcast was your intended target).
 
Paging Dave Jimmerson.....

I was asking about mixed frame rates a few months ago, he suggested a 60P timeline? Does that sound right?
 
I've just always cut on a 24p timeline in those instances. Never run into a lot of problems. That is the benefit of premiere, now-a-days you can easily mix frame rates.
 
Is it actually 29.97 -- 30p?

Or is it "29.97" -- 60i, which is really 59.94?

If it's 30p, then you really can't convert it to 24p, or 24p to 30p, without major quality hits -- choppiness, ghosted frames, etc.

But as Scott F says above, yes, you can edit both on a 60p timeline and not lose any quality, though there will be a visual difference between the frame rates. You have to export as 60p, too.

If it's 60i, then you can convert it to 24p, though you will lose vertical resolution.
 
I want to thank you all for taking the time to help out with this. It's refreshing to know that DVX still has members willing to chime in with great advice and help a fellow film maker.
David- It was the 1920 x 1080p / 29.97 fps (200 Mbps) setting. Is that considered 30p? I was under the impression the gh4 had only one setting for true frame rates which is the 24p after changing the cam frequency, but 30p was actually 29.97

I'm going to play around a bit more tomorrow, If Twixter isn't up to the task It's good to know I can fall back on dropping it all on a 60p timeline. I honestly would have never thought of that. So again thanks! It's much appreciated:-) I will report back soon. :-)

My only other option would be to reshoot it, but like I said, the footage looks and sounds petty darn good, even at 29.97
 
@stefanhueberfilms great video man, I wasn't able to really see much difference at all. Looked really good. Thanks for posting!

Great advice GregE, It will be broadcast for sure. thanks!
 
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TSDavis said:
I've just always cut on a 24p timeline in those instances. Never run into a lot of problems. That is the benefit of premiere, now-a-days you can easily mix frame rates.
Click to expand...

I deal with so much 30p secondary footage......GoPros, HDSLRs, consumer camcorders, etc. for the work I edit. (handed off from other sources in most cases)

24p is MY flavor of choice. I'm willing to roll the dice and try shooting & cutting my next project on a 24p timeline. Thanks for your 2 cents and OP, how is everything working out? Just curious.
 
You might be able to get away with it if the 30p footage doesn't have a lot of motion. But the more motion it has, the less likely you'll get good results.

It's not really a question of the software; it's just math. There just isn't enough difference between 24 fps and 30 fps to re-jigger everything smoothly.
 
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