How to use Gopro .LRV-File as proxy file in FCPX

Question

gisler1987 Author

Level 1

8 points

How to use Gopro .LRV-File as proxy file in FCPX

Hi there

Video editing on my Macbook Air is obviously very slow. Using the proxy media function in FCPX helps a lot. However, the transcoding of my original 1080p Gopro footage takes for ever!

Since the Gopro automatically generates a low res video file for each clip (.LRV - low res video), I would like to use this file as my proxy file. This would save me from generating all the proxy files which takes forever.

How do I do this? How can I tell FCPX that I want to use proxy files but I'd like to use my own .LRV-proxy files. Is this possible? Thanks for any help.

Regards

Matt

Final Cut Pro X, OS X Mountain Lion (10.8.5), Macbook Air

Posted on May 17, 2014 1:59 AM

Reply

Answer 1

BenB

Level 6

13,216 points

May 17, 2014 8:56 AM in response to gisler1987

.LRV is a proprietary codec to the GoPro, which FCPX does not support.

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Answer 2

gisler1987 Author

Level 1

8 points

May 17, 2014 9:28 AM in response to BenB

I know but is there any way I can transform this small LRV-file to a codec that FCPX supports?

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Answer 3

BenB

Level 6

13,216 points

May 17, 2014 11:02 AM in response to gisler1987

Not that I am aware of, and if there was, it would take as long to transcode to ProRes Proxy as anything else would, on an Air.

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Answer 4

gisler1987 Author

Level 1

8 points

May 20, 2014 10:23 AM in response to gisler1987

I actually found out how it works:

1. Import HD content to FCPX (no proxy, no optimization)

2. Add .LRV file to Final Cut Events/YourEvent/Transcoded Media/Proxy Media and rename files to .mov

3. Restart FCPX (this was my mistake… FCPX showed "changed file")

4. Edit using proxy media, then change back to original media

5. Export

Exporting still takes ages but I only have to wait once 🙂

Best

Matt

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Answer 5

BenB

Level 6

13,216 points

May 20, 2014 10:26 AM in response to gisler1987

No way! You lie! I'm going to have to try it with my own GoPro footage tomorrow to test. I can't belive this actually works. You sure? Dude, that is a pretty slick discovery! You must be kidding. It can NOT be that easy. REally? NO WAY BRA!!!!!

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Answer 6

gisler1987 Author

Level 1

8 points

May 20, 2014 10:32 AM in response to BenB

It works 🙂

It actually works better (faster) with these smaller proxy files but it is harder to color correct and similar tasks since the quality of the footage is quite bad. At least it is good enough for the quick edit :-)

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Answer 7

BenB

Level 6

13,216 points

May 20, 2014 10:52 AM in response to gisler1987

Oh no, you NEVER color correct with proxies! No! That is just a waste of time.

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