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Converting a 1080p 23.976 fps project to 720p60 for broadcast

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Sharad Patel
Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Jun 7, 2010 at 3:32:12 pm

I was wondering if compressor can handle a conversion
from 23.076-fps-progressive-(1080p)
to
a broadcast standard of H264-codec that is 720p60 or 1280x720-59.64-fps (the ABC broadcast format)

it would imply making a progressive pull-down as opposed to the an interlaced pull-down.

Does anyone know the proper settings to achieve this?

I prefer Rob Bottin to Rick Baker


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Jeremy Garchow
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Jun 7, 2010 at 4:04:46 pm

[Sharad Patel] "Does anyone know the proper settings to achieve this? "

Compressor can do this, yes.

You can also do this in FCP itself. FCP is acutally correct at handling pulldown in a 720p world.

What I would do is export your 1080p23.976 movie as a self contained.

Bring that movie back in to FCP, setup a 720p59.94 timeline with the codec of your choice and drop the movie in there and hit no when FCP asks if you want to change the settings. You will notice progressive 3:2 pulldown.

If you want to use Compressor you can do that too.

Or, if you have an AJA capture card, you can simply cross convert this in hardware on output.

Jeremy


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Sharad Patel
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Jun 7, 2010 at 4:13:54 pm

thanks!

I prefer Rob Bottin to Rick Baker


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Matt Campbell
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 20, 2011 at 8:15:09 pm

Bring that movie back in to FCP, setup a 720p59.94 timeline with the codec of your choice and drop the movie in there and hit no when FCP asks if you want to change the settings. You will notice progressive 3:2 pulldown.

Jeremey, progressive pulldown? Stepping through, is that 1 dup frame, 1 new frame. 2 dup frames, 1 new frame? Sound right?

I'm doing this now (I know we've been through this before in other posts), I have a 1080p23.98 file going into a 720p59.94 timeline. All same codec, ProRes 422. Just seems like there's some weird frame blending n what not. I've also tried Compressor for this with frame controls on. Good results through playback, but stepping through it just looks odd. Maybe I just need to get over how it looks stepping through and go by playback on our broadcast monitor, which is fine. thx

OS 10.6.3, Mac Pro 2 x 2.66 ghz quad-core intel xenon, 16 gb ram, with BM Intensity Pro card


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Jeremy Garchow
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 20, 2011 at 8:40:16 pm

[Matt Campbell] "Jeremey, progressive pulldown? Stepping through, is that 1 dup frame, 1 new frame. 2 dup frames, 1 new frame? Sound right?"

SHould be frame, dupe, new frame, 2 dupes, frame, dupe, new frame, 2 dupes, etc.

It's 3:2 pulldown, just using whole frames instead of fields.


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Matt Campbell
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 20, 2011 at 8:58:17 pm

Yeah it is. I just worded it backwards. Thx.

thought i was correct.

OS 10.6.3, Mac Pro 2 x 2.66 ghz quad-core intel xenon, 16 gb ram, with BM Intensity Pro card


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Jeremy Garchow
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 20, 2011 at 8:58:31 pm

[Matt Campbell] "thought i was correct."

Yessir! What did oyu mean by frame blending? Shouldn't be doing that.

Jeremy


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Matt Campbell
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 20, 2011 at 9:51:58 pm

I meant that with the one I did in Compressor, turning on the frame controls to best, I think the optical flow was interpulating or blending the 2 frames to create a new one. Not sure if that's the right terminology or not but sounded good to me. haha

image below.



OS 10.6.7, Mac Pro 2 x 3 ghz quad-core intel xenon, 4 gb ram and AJA IoHD


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Jeremy Garchow
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 20, 2011 at 9:54:56 pm

[Matt Campbell] "I meant that with the one I did in Compressor, turning on the frame controls to best, I think the optical flow was interpulating or blending the 2 frames to create a new one. Not sure if that's the right terminology or not but sounded good to me. haha"

Yes, you are right. If using compressor, use the "fast" options for deinterlace and rate conversion (and make sure output fields are set to progressive). That should get you the frames instead of interpolation. You can still use "best" for frame size.

It's just like adding interlaced 3:2 pulldown, you leave those setting to fast and it will create the fields properly.

Jeremy


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Matt Campbell
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 21, 2011 at 3:13:10 am

Huh, did not know that. But that will def come in handy for batch encoding. Especially the interlacing tip. I'd been doing those in AE, adding 3:2 interlaced that way. Thx. Those are nine tips.

OS 10.6.7, Mac Pro 2 x 3 ghz quad-core intel xenon, 4 gb ram and AJA IoHD


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Jeremy Garchow
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 21, 2011 at 3:18:17 am

[Matt Campbell] "I'd been doing those in AE, adding 3:2 interlaced that way."

That works too. Compressor is a little easier for batches, and will keep similar tc to original.

[Matt Campbell] "Those are nine tips."

Nine? I thought it was just a few! ;-D


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Matt Campbell
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 21, 2011 at 8:34:33 pm

Jeremy, does this hold true for 1080 23.98 footage into a 1080 29.97 sequence? And how about for SD? I know FCP/Compressor handles it correctly for 720p material, but will it not for SD and 1080?

OS 10.6.7, Mac Pro 2 x 3 ghz quad-core intel xenon, 4 gb ram and AJA IoHD


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Jeremy Garchow
Re: Converting a 1080p 23.976 fps project to 720p60 for broadcast
on Sep 21, 2011 at 9:04:33 pm

[Matt Campbell] "Jeremy, does this hold true for 1080 23.98 footage into a 1080 29.97 sequence?"

For interlaced 3:2 pulldown (23.98 to 29.97), you set the output fields to upper to lower depending on your format. HD is upper, SD is lower. Then yes, you keep the rate conversion and deinterlace set to fast and it adds proper 3:2 pulldown.


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