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59.94 or 29.97 for Broadcast Stations

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Justin Toney59.94 or 29.97 for Broadcast Stations
by on Nov 20, 2014 at 3:39:06 pm

Please pardon my ignorance on this one. Recently we upgraded from the analog SD world with a resolution of just 720x480 29.97. Now we are at a point where production needs to be 1280x720 59.94 Progressive.

My question is in regards to After Effects, for a progressive image, does it matter if I'm rendering in 29.97 or 59.94? In Premiere, yes that would matter.

Some issues we are having is that clips in a 29.97 rate play twice as fast in the 59.94 project. Since my news room is still SD I'm having to contend with this for some projects.

Thank you


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Dave LaRondeRe: 59.94 or 29.97 for Broadcast Stations
by on Nov 20, 2014 at 4:20:21 pm
Last Edited By Dave LaRonde on Nov 20, 2014 at 5:06:13 pm

My station's in the same boat. We're cutting on Avid -- Newscutter 9 in the newsroom in SD 16x9, Media composer 6 in production & promotion at 720p 59.94. No problems here handling 29.97 footage. And the motion looks okay; it's just a little soft-looking. Cripes, it should -- it's stretching out a picture that's about a quarter of the size!

Something tells me Premiere isn't set properly on your end. You ought to be seeing the same frame twice when using SD footage on a high-def edit system; it shouldn't be playing at twice-normal speed.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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James ArchibaldRe: 59.94 or 29.97 for Broadcast Stations
by on Nov 20, 2014 at 6:02:32 pm
Last Edited By James Archibald on Nov 20, 2014 at 6:03:26 pm

Yikes, NTSC standards are messy!

But yeah, Premiere is usually pretty sane with its handling of different framerates on a timeline. It should playback uniformly, adding extra frames to keep up (with the option to blend them during export). Check your prefs and project settings.

Why the framerate increase in the first place, out of curiosity? I understand the increase in resolution, but what's the advantage of going to 59.94?

• Archie •


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Dave LaRondeRe: 59.94 or 29.97 for Broadcast Stations
by on Nov 20, 2014 at 6:21:54 pm
Last Edited By Dave LaRonde on Nov 20, 2014 at 6:26:33 pm

Because NTSC HD 720 broadcast is at 59.94 complete frames per second, that's why.

There's no interlacing like at 1080... 1080i 29.97, y'know.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Justin ToneyRe: 59.94 or 29.97 for Broadcast Stations
by on Nov 21, 2014 at 5:59:24 pm

Which is why if I'm working in a 1280x720 59.94p project with 720x480 29.97 clips then I need to know what is the best practice.



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Dave LaRondeRe: 59.94 or 29.97 for Broadcast Stations
by on Nov 21, 2014 at 6:45:22 pm

Scale the clips up in Premiere, do the edit, export to AE, and do your AE voodoo.

I'm told Premiere's scaling is better than AE's. At least for sdcaling up.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Ben MarcheskiRe: 59.94 or 29.97 for Broadcast Stations
by on Dec 9, 2014 at 5:47:40 am

Don't forget to double check your upper/lower field dominance if you are exporting footage to/from After Effects. Scaling vs. traditional HD up conversion could add more problems if the footage isn't interpreted properly, but both apps will give you Interpret Footage options.


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