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Old July 3rd, 2007, 02:27 PM   #1
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Optical Flow in Motion 3

Has anyone had decent results using optical flow in Motion 3? There are no settings so you can't tweak anything.

If you want... test this.

- Here is a 720p60 clip. (http://www.genecrucean.com/misc/8203TS.mov 73mb DVCProHD)
- Use FRC to convert to 30p (29.97).
- Drop it into a 30p timeline.
- Adjust the speed to 50%
- Send to Motion
- Open the Inspector and at the bottom is Timing. Open that and change the frame blending to Optical Flow. Wait for it to calculate. Save.
- Back in FCP... render the new .motn clip.

This is MY result. http://www.genecrucean.com/misc/RC_3...pticalflow.mov 9.5mb H.264
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Old July 3rd, 2007, 02:30 PM   #2
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Ehh... Motion 3.0.1 btw.
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Old July 3rd, 2007, 04:58 PM   #3
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You have the fields reversed somehow...
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Old July 4th, 2007, 12:06 AM   #4
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Umm, It's all progressive 720p60 footage shot with an HVX. But... I'll look into that more tomorrow. Thanks for the comment Glenn.
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Old July 24th, 2007, 09:24 PM   #5
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Same problem

Hi Guys,

This is kindof an old post but I was treversing through the posts and found it. I have the same problem! I have tried numerous times...all the same settings...30p, just super jagged. Hope someone has had better luck!
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Old July 25th, 2007, 06:46 PM   #6
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Yeah this is still un-resolved with me too.

There are a few deal breakers for me personally with FCS2. I hope they release an update soon.
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Old July 25th, 2007, 06:54 PM   #7
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Let me take a stab at it, but what is FRC?
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Old July 25th, 2007, 08:57 PM   #8
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Frame Rate Converter, chief.
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Old July 26th, 2007, 05:06 AM   #9
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Ah, DVCPRO HD virgin here.

I downloaded the clip and followed the directions and I also got the same stuttery output. At this point, it could either be how frames are spit out of the FRC (I used non-self contained) or the way Motion is screwing up the analysis. My bet is on Motion. I must say, I very rarely use Motion, but it is extremely unrefined and buggy. It needs some serious QA fixes.

The good news is you can get the 120fps slowdown look using Compressor 3 with its frame rate control. I have been able to successfully slow the bike footage using this method.

The bad news is, even with optical flow, the slowdown exhibits some motion artifacts such as shimmering and waviness in interpolated frames. Even if you could get Motion/FCP to do a proper slow-down, the results will not look pretty.
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