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24p to 29.97p
Hello,
I work at a small cable company and am experimenting with producing commercials with more of a film look. My deliverable is required to be 29.97p (or 59.94p). We’re using a JVC GY-HM750CHU camera, shooting in 24p at 59.94fps with shutter at 1/48. I’ve been shooting some examples and editing in Premiere CC 2014 (I’ve tried both a 24p timeline and a 59.94p timeline), but when I export my final version, the pans and zooms look very jerky, no matter how slow or fast I make them. I’m sure it has to do with how Premiere adds frames, but is there any way to change how it does that to smooth things out? What is the secret to shooting 24p and getting smooth movement in 29.97p/59.94p? What am I missing?
Thanks in advance for any insights you can provide.
David Hawksworth
Video Producer
Eagle Communications, Inc.
Abilene, KS -
5 Replies
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First I would make sure that your footage is correctly interpreted at 23.976 when you import it in Premiere Pro. Then to eliminate any issue related to Premiere processing, I would cut your commercial in your native frame rate (I believe it should be 23.976 because it is wrapped up in a 59.94 video stream). Then I would create your master (for broadcast it must be 1080i59.94) adding pull-down: I usually prefer to use After Effects for that last step, because I feel I have more control, but with some experimentation you might be able to achieve the same with Premiere Pro.
Also remember that is part of the issue when you are shooting at 24: you have to understand the acceptable speed of your pan to avoid “stuttering”. If you’ve got Twixtor plugin, you may want to see if you can smooth things out.
For future shooting, and if you are not afraid of more post work ;-), you may want to experiment shooting at 29.97 (that will allow you to have extra frames for your pans and motion), cut at 29.97, then convert to 23.976 (to get your film look), before adding pull-down for your master.
Good luck,
David Baud
Post & VFX
KOSMOS PRODUCTIONS
Denver – Paris
http://www.kosmos-productions.com -
Thank you David. This has certainly improved my results, though I still would like to experiment with the cadence and field order to see what differences they may make. I appreciate your advice.
David Hawksworth
Video Producer
Eagle Communications, Inc.
Abilene, KS -
24p to 29.97p won’t look good. Not without some magic in After Effects. The best way to cover up the frame difference in 23.98 to 29.97 is with interlacing (so 24p to 60i)…adding pulldown. What happens when you transfer film to video tape. The frames are spread out amongst the fields. But 24p to 30p…no fields to spread…so frames are then duplicated.
24p to 60p is easier too…more frames to handle the duplicated frames from 24p. But 60p is only a broadcast format at 720p. But it does work.
24p to 30p is the odd one.
Shane
Little Frog Post
Read my blog, Little Frog in High Def -
Thanks Shane. I’m also having ok results with blending frames in Premiere (Clip>Video Options>Blend Frames). I’ll have to look at the results on an SDTV, but overall I don’t like the blurriness of the pans. Unless an SDTV shows me otherwise, I’ll probably abandon the idea. Thanks for all the advice.
David Hawksworth
Video Producer
Eagle Communications, Inc.
Abilene, KS -
You can also try to modify your clips: pull down menu- CLIP — MODIFY —- INTERPRET FOOTAGE and set your clip frame rate to whatever you are trying to match. I’ve had good luck using this method for editing in b-roll. This adjusts the actual length of the clip, so a 23.976 clip interpreted to 29.97 will playback in slow motion. You can also After Effects, MPeg Streamclip, or any one of a number of other tools to transcode the media to a common format.
TV- It’s why Kennedy beat Nixon
david seay
https://www.davidseayproductions.com
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