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Revl Arc cam: Anybody preorder one?

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ptraykovski
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Re: Revl Arc cam: Anybody preorder one?

Postby ptraykovski » Mon Jan 15, 2018 7:50 pm

CaptainArgh wrote:
Mon Jan 15, 2018 5:03 pm
ptraykovski wrote:
Mon Jan 15, 2018 6:14 am
Shot some footage with the revl this weekend. Still definitely needs some work on the stabilization and leveling, but fairly watchable and not too complicated.

This is with a bit of post stabilization with mercalli software
Thanks for sharing that, looks like a fun day!

The image quality is kind of shitty. Is that just the compression from the YouTube upload and such or did it look similar raw out of the camera?

Lost a bit of iq in processing/ upload , light was bad and forgot to take plastic shipping film off the lens.
One step down in iq than go pro still, but not too bad in good light

I'd agree that there are some stability issues still, BUT, it's still a lot better than doing it manually with keyframes in post processing. So, to capture a quick sessions, not bad. Easy to edit into a larger flick.

Also, what did you use for a line mount?

Ugo works well. A bit narrower fov than GoPro so mount pretty far up

ouno
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Re: Revl Arc cam: Anybody preorder one?

Postby ouno » Tue Jan 16, 2018 4:11 pm

ptraykovski wrote:
Mon Jan 15, 2018 6:21 am
ad this is my own gopro IMU backback from a few years ago wth active horizon tracking in post processing...very complicated and slow to process. not much hand editing though, and I think is better than the commercial offerings :D
Nice !

Btw, did you know the gopro 5, gopro 5 Session and gopro 6 all include IMU data stream directly in their MP4 files ? For example the gopro 5 session writes 400Hz 3-axis gyros data and 200Hz 3-axis accelerometer data in the MP4 files it produces. Theoretically, you don't need any additional IMU backpack with these gopros, all the information for flat horizon correction is directly integrated in the video files...

Someone worked a bit on this metadata extraction here: https://forum.processing.org/two/discus ... o5-sensors
He produced this video for example with his tools: https://www.youtube.com/watch?v=bg8B0Hl_au0
(notice the parts in the rollercoaster sequences where he compensates automatically the roll to keep the horizon straight, exactly the same problem we have with the linemount videos...)

GoPro also officially made an open-source tool to extract these IMU data automatically: https://github.com/gopro/gpmf-parser

ptraykovski
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Re: Revl Arc cam: Anybody preorder one?

Postby ptraykovski » Tue Jan 16, 2018 4:43 pm

ouno wrote:
Tue Jan 16, 2018 4:11 pm
ptraykovski wrote:
Mon Jan 15, 2018 6:21 am
ad this is my own gopro IMU backback from a few years ago wth active horizon tracking in post processing...very complicated and slow to process. not much hand editing though, and I think is better than the commercial offerings :D
Nice !

Btw, did you know the gopro 5, gopro 5 Session and gopro 6 all include IMU data stream directly in their MP4 files ? For example the gopro 5 session writes 400Hz 3-axis gyros data and 200Hz 3-axis accelerometer data in the MP4 files it produces. Theoretically, you don't need any additional IMU backpack with these gopros, all the information for flat horizon correction is directly integrated in the video files...

Someone worked a bit on this metadata extraction here: https://forum.processing.org/two/discus ... o5-sensors
He produced this video for example with his tools: https://www.youtube.com/watch?v=bg8B0Hl_au0
(notice the parts in the rollercoaster sequences where he compensates automatically the roll to keep the horizon straight, exactly the same problem we have with the linemount videos...)

GoPro also officially made an open-source tool to extract these IMU data automatically: https://github.com/gopro/gpmf-parser
All I had when I did that project was a gopro 4.

I did not know you could get the data on the new ones..I thought it was locked up. That is very useful info and opens all sorts of possibilities, especially with the new 360 camera. Maybe I should get a Gp6 and revive my project...but I need to sleep at night and not fiddle with all sorts of tricky coding!

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CaptainArgh
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Re: Revl Arc cam: Anybody preorder one?

Postby CaptainArgh » Tue Jan 16, 2018 8:51 pm

ouno wrote:
Tue Jan 16, 2018 4:11 pm
...Btw, did you know the gopro 5, gopro 5 Session and gopro 6 all include IMU data stream directly in their MP4 files ? For example the gopro 5 session writes 400Hz 3-axis gyros data and 200Hz 3-axis accelerometer data in the MP4 files it produces. Theoretically, you don't need any additional IMU backpack with these gopros, all the information for flat horizon correction is directly integrated in the video files...

Someone worked a bit on this metadata extraction here: https://forum.processing.org/two/discus ... o5-sensors
He produced this video for example with his tools: https://www.youtube.com/watch?v=bg8B0Hl_au0
(notice the parts in the rollercoaster sequences where he compensates automatically the roll to keep the horizon straight, exactly the same problem we have with the linemount videos...)

GoPro also officially made an open-source tool to extract these IMU data automatically: https://github.com/gopro/gpmf-parser
I did NOT know that. Thanks for sharing!
Any idea of FCPX taps into that data for stabilization or if they have a plug-in that does so?

Joaspi
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Re: Revl Arc cam: Anybody preorder one?

Postby Joaspi » Tue Feb 20, 2018 12:57 pm

Hello guys I make a review about the Revl Arc, here : https://www.youtube.com/watch?v=q1fGFFlhJLY

phpBB [video]


If you have any questions ask me.

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Re: Revl Arc cam: Anybody preorder one?

Postby Sgallian » Tue Feb 20, 2018 2:32 pm

Great, thanks for the review!
This confirms that we would be better off with the Quark: at least we can change the GoPro on it. Only pb would be the greater risk of tangled lines in it...

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POACHER
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Re: Revl Arc cam: Anybody preorder one?

Postby POACHER » Tue Feb 20, 2018 5:34 pm

Yeah I could get past the slightly reduced image quality, (I'm not making movies for Industrial Light & Magic...) but the image stabilization is a total fail by my estimation. This video is of someone riding a bike on pavement. PAVEMENT.
https://www.youtube.com/watch?v=SohBxXCkRsw
My GoPro 4 would have similar poor results. Put this on a technical mountain bike trail and it would be unwatchable. (just like my Hero 4 is)

I don't want to openly bash this thing, but I think people should be aware of it's limitations and what they're getting for $400. Being able to auto horizon is cool, but a useless feature for most sporting applications. (exceptions being kiting line mounts and or bungee jumping, sky diving) The stabilization is really lacking by all videos of seen so far. The crap audio quality is also a big negative.

I really want this company to succeed and in fact bring a truly integrated, stabilized camera to market.
Here's to hoping that Version 2.0 is in the works and on the way...

rogue_kiteboarder
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Re: Revl Arc cam: Anybody preorder one?

Postby rogue_kiteboarder » Tue Feb 20, 2018 6:17 pm

I could not even read the street signs it was shaking so bad. And that was a Fat Tire bike, imagine what that would look like on a road bike.

But, it looked like he had it mounted on the bike itself, which is kinda dumb. Any FPV should be mounted on the rider, which stabilizes the footage even more than good stabilization.

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Re: Revl Arc cam: Anybody preorder one?

Postby Brin » Tue Feb 20, 2018 9:39 pm

Still waiting for mine ordered in 2017, June................yawn...........no response from them to any direct communication via website or email....are they still breathing?

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Re: Revl Arc cam: Anybody preorder one?

Postby CaliRider » Sat Feb 24, 2018 5:21 pm

Going to order a rylo next week. Heard that the gopro6 has problems and this revl looks like a POS for the money. Im not dropping 4 bills on a camera to be a test dummy and from what i can see they don't have any stats they claimed working yet at all. and theres some weirdness in their videos when the CEO dude is riding in the wake part and he does things and the speed and other data isn't changing until like a few seconds after. i don't know much about this but the movement and the data should happen at the same time. i think they FOS.


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