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1080i to 720p to NTSC
I have what is, admittedly, a goofy work flow that I’m forced to deal with. And I’m struggling. I’m sure I’ve omitted some useful info in the description below. Let me now if you need more info. I’m grateful for any help.
Background: We produce a television show that airs in standard definition (NTSC anamorphic).
The video we shoot for the show ourselves is 720p (DVCPROHD). So that’s our editing format during the week in FCP 7. (That said, everything ultimately ends up being imported into an Avid Newscutter/ISIS system when the show is assembled on the weekend, with studio segments.)
Each week a client delivers source video to us via ftp that we also use in the show. We have no say in that video format — it comes to us as 1080i, h.264, 29.97.
Issue: This 1080i video is the source of my problem. Using Compressor, I can’t seem to produce good results transcoding this 1080i video to either 720p or directly to NTSC. Either way I get those nasty saw tooth edges. I’ve tried exporting just about every way imaginable, using the various frame control options in Compressor. Deinterlaced, lower, upper. Nothing seems to rectify the problem.
Here’s a FCP screen cap of the 1080i properties:
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16 Replies
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I assume you don’t have hardware for the conversion?
An I/O Card like the Kona 3?It’ll look decent with Compressor, Select the conversion to 720p
Turn frame controls on to best.Chris Tompkins
Video Atlanta LLC -
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Just assuming 60p Choose which ever Frame-rate you are cutting.
Then import the rendered file into edit. Should look Much better.
Chris Tompkins
Video Atlanta LLC -
Thanks Chris. Under frame controls>output fields, are you suggesting I keep it same as source? Or should I select progressive?
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Rafael — the 1080i video is from a live broadcast. So I can’t imagine it would be 24p.
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I’d try progressive for the output fields.
Chris Tompkins
Video Atlanta LLC -
Just had an interesting discovery. I transcoded the file using the “Apple ProRes 422 for Progressive material” preset. And the video looked good, though still 1920×1080. But using that very same preset, and only changing the size to 1280×720, produced bad video.
And that’s the hitch: I need to bring the video down from 1080 to 720.
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[Matt Smith] “Rafael — the 1080i video is from a live broadcast. So I can’t imagine it would be 24p.”
And what´s the problem on life-streaming from a camera shooting p24?
That´s plain 1080p24PSF.
1080 stuff (1080p24, 1080p30,1080i60) is ALWAYS streamed as 1080i60. That´s the SMPTE standar.Have a look to this thread about 1080 streaming:
https://forums.creativecow.net/readpost/8/1141042
So, take the pull-down if you want to process
rafael -
Matt,
I don´t want to mislead you (I´m far from my Compressor); just wanted to point you out that your stuff coud be any of three flavors (p24,p30 or i60)if was streamed.
You must find out which one is your footsge.
rafael -
Forgive me if my knowledge base is limited, but by streaming are you referring to an online stream of some sort? None of this is streamed video. It’s all broadcast video.
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