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My Gopro 3+ Black 180 degree stereo rig

mediavrmediavr Posts: 234
Art3mis
Here is a 180 equirectangular stereo movie done with a twin Gopro 3+ Black rig
https://www.dropbox.com/s/gslyccr43c8whwy/eveleighmarkets.mp4

In VR Player under Media you need to set Format to Side by Side and Projection to Dome

Until recently there was no way to get good synchronization reliably with recent Gopros for stereo but there is now a sync cable you can buy from http://3dguy.tv/ which works well. I am not sure if the concept behind it can be extended to work with more than 2 cameras

Basically my rig for this video looks like this http://www.mediavr.com/gopro3plusfisheyestereorig.jpg
with replacement Sunex lenses to get about 180 by 150 degree coverage on the 1920 by 1440 format on the Gopros

It is very simple to shoot 3d for the Rift with this because all you need to do is hold the camera level and point it generally in the right direction.

For more accurate composition I can plug a Gopro LCD Backpak into the cable or I can plug a 7" monitor into the HDMI socket of one or other of the Gopros -- I have this one
http://www.ebay.com.au/itm/FEELWORLD-7-TFT-LCD-HDMI-Monitor-FW678-HD-O-W-Sun-Shield-Shoe-Mount-f-Camera-/141125167872?pt=LH_DefaultDomain_15&hash=item20dbb72b00&_uhb=1

With two LCD Backpaks connected you can get stereo previewing of the video if you arrange some optics (spare Rift lenses maybe).
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Comments

  • Very cool! I plan on making a stereoscopic paragliding vid this spring, and will use a couple of hd hero 3s for it.

    For synch, couldn't you use an audio cue to tie the two cameras together with?

    Regards,

    Mark
  • geekmastergeekmaster Posts: 2,866
    Nexus 6
    Very cool! I plan on making a stereoscopic paragliding vid this spring, and will use a couple of hd hero 3s for it.

    For synch, couldn't you use an audio cue to tie the two cameras together with?

    Regards,

    Mark
    Skaven252 wrote:
    The biggest drawback of this system is that the cameras do not perfectly sync. For that you need a genlock.
    I've had similar issue with my two VIO POV.HD cameras, and turns out this was caused by variable framerate. As in, the timecode is actually accurate enough between the cameras, but when the cameras drop frames inconsistently, the streams go out of sync when the footage is multiplexed together, and quantized to frames at a constant framerate.

    Vegas Movie Studio actually refuses to pair two video clips if their average framerates differ too much (due to dropped frames). However, I tried the demo of another editing software, the Magix Movie Maker Pro, and it appears to be able to handle dropped frames and variable framerate that are inconsistent between stereo pairs, and keep them in sync.

    I haven't been able to try this with six video streams (!), but I can imagine the problem can be sixfold. :)
    This may be obvious to you, but in case it can help even a little, I will add my "two cents worth" to this discussion:

    The "old school" solution to this back in the analog days was to record a timecode with your video. I have an old 8-bit ISA MIDI card that could read and write SMPTE timecodes to an audio track, but these days it is usually written to the VBI (where things like Closed Captions are also commonly stored). Digital cameras may be able to interleave timecodes into the digital video stream. Beware that the timecode needs to be sinewave modulated (like my MIDI card did) or the square wave harmonics will not record well on a compressed audio track.

    Here are some people recording audio timecodes with goPro cameras:
    http://jwsoundgroup.net/index.php?/topic/15114-audio-and-timecode-onto-a-gopro/

    Essentially, you can use one of the audio tracks to hold a (sinewave modulated) timecode on each camera. It can even be subsonic (not accurate to an individual frame) so you can still put audio on all tracks, and filter out the timecodes later...

    The problem with using the internal timecode generator in video cameras is that they are NOT genlocked and can drift. It is much better to use a single timecode generator to keep them all genlocked (often an output from one of the cameras that is fed into the others). For cameras that do not support genlock, these days you could use a little embedded processor like an arduino to generate the common SMPTE audio signal that gets recorded on one audio track on each of the video cameras.

    More on timecodes:
    http://campbellcameras.blogspot.com/2011/08/importance-of-time-code.html
  • mediavrmediavr Posts: 234
    Art3mis
    edited December 2013
    Re sync
    I think it is very important. With the Gopro 2 3d Kit the linked Backpac units provide a synced video start and then it relies on the cameras having no relative drift to stay in sync -- which they do in my experience. With the sync cable from 3dguy.tv the principle seems to be the same, except it works with Gopro Black 3 and 3+ (maybe other 3 models too). The sync is as good as with the 3dkit for the Gopro 2 I would say. There are inconveniences though with having to use scripts on the cards, and having to pre-choose the duration of each sequence (30sec, 5 minutes etc).

    Also if you want to get the closest interaxial with the Gopro3s-- cameras horizontal, one inverted relative to other -- you are out of luck for fast action scenes as the rolling shutter is different and you get missyncs. The closest you can get otherwise is with the cameras vertical, and both up the same way. Also mp4 compression can introduce missyncs sometimes even if everything else is ok.

    For audio syncing it is simple to line up audio tracks in After Effects etc if you have sharp sounds. People use Pluraleyes a lot to automate this. But the sync is only to a frame accuracy, not subframe which is what you need. I think the sync error should be less than 1/500 ideally. As the Rifts get higher res missyncs will be more and more painful
  • mediavrmediavr Posts: 234
    Art3mis
    Here are a couple of pics of a side by side vertical Gopro Black 3+ rig
    http://www.mediavr.com/verticalgopro3drig.jpg
    http://www.mediavr.com/verticalgopro3drig2.jpg
    This works well as a handheld rig where you look through the magnifer at the LCD Backpac image from one camera with one eye while the other eye monitors a bubble level

    and here is a short video shot with it
    https://www.dropbox.com/s/e7ipoxoii8ccci4/woolworths.mp4 (23Meg)

    (In VR Player under Media you need to set Format to Side by Side and Projection to Dome)

    The closer lens interaxial helps when people get very close to the camera

    One issue with shooting full circle fisheye views with Gopros is that the camera sees a lot of black around the image circle and thinks the scene is dark and often overexposes it. It does this even if you choose spot metering mode. Lately there is a hack for the autoexec file you put on the memory cards (for the syncing). You need to add a line at the start of the script which locks the exposure for video - so you point the camera somewhere bright at the start and it locks the exposure at a darker setting.
    See https://github.com/KonradIT/autoexechack/tree/GoPro/LockVideoExposure

    This works great and removes an aggravating glitch for shooting 180 3d movies with Gopro 3+ stereo rigs.
  • 3dguy3dguy Posts: 8
    Brain Burst
    Looks good! I am working on a 3D printed Oculus Rift Rig. Anyone interested please contact me. 8-)
  • mediavrmediavr Posts: 234
    Art3mis
    I was asked to write an article about 3d panoramic videoing for the Rift by Stereoscopynews ..
    here it is
    http://www.stereoscopynews.com/hotnews/3d-technology/software-a-hardware-tools/3493-a-vertical-3d-rig-for-360-3d-video.html

    someone on Reddit/Oculus asked why my videos were short ... short attention span maybe .. but I gave this answer too ...

    The workflow for converting the fisheye videos into side by side movies in a format for VRPlayer for the Rift has quite a few steps -- so it is time consuming to do longer movies. This is what I typically do- load both videos into After Effects and trim off bits of the videos I dont want. Align the videos (using distant features in the views) in After Effects. Export both videos as image sequences (plus a sound track). Batch process each of the image sequences in Photoshop to improve the image quality -- denoise, color correction etc. Load the first of the L images and the first of the R images into PTGui Pro (a panorama stitching program). Get the program to find common features in distant areas (using masking to constrain point finding to distant areas). Using the first L shot as the reference get PTGui to work out the roll, pitch, and yaw, and H and V shift values of the first R shot to bring it into exact alignment with the first L shot for the distant areas. Save this data as a template. Then you use the intrinsic lens values you have for the first L shot (fov, a, b and c distortion factors - by a precalibration process with a panorama head) to apply to all the L shots. Export from PTGui all the L shots in a 180 by 180 equirectangular format. Then load all the R shots, set the roll, pitch and yaw values and H and V values (shift) and intrinsic lens characteristics values you have obtained by precalibration to all the R shots and export those. Then load both new L and R image sequences into After Effects, use the Mesh Warp distort filter to fine tune vertical alignment in local areas, and export as another image sequence. Then load both new image sequences into After Effects again, arrange in side by side mode, add the sound track and export as an mp4 for VRPlayer and upload it to Dropbox.
    As you can see there can be quite a lot of processing steps in After Effects, Photoshop and PTGui Pro -- some of which can be slow, though generally each step is fast as the images are small -- so for demonstration purposes I am inclined to make shorter movies, especially as it is hard to see if will work well til you finish.
    One reason why it is so convoluted is that Gopros have quite loose tolerances in the assembly of the sensor units so often the lens barrel is off centre (by many pixels) in respect to the sensor (the sensor is just taped on to the sensor barrel). So the vertical and horizontal alignment of Gopro shots , even from exactly the same position will be very different generally in two cameras , requiring quite rigorous alignment processing for good results.
    Yes I should do a proper tutorial on all this -- but at least the process is very replicable, and a precise rig gives good starting points and the good sync and exposure lock now possible with the latest Gopros is very motivating.
  • mediavrmediavr Posts: 234
    Art3mis
    I have been experimenting with hyperstereo lens separations -- like 20cm for this video
    https://www.dropbox.com/s/t6sfuw6tt435lek/pittstmime.zip (64Meg)
    After you load the video with VRPlayer go ... Tools/Load Preset and select the file with the "json" extension

    This 180 degree wide 3d video was shot with the aid of a pole with the cameras about 4 meters in the air. With too much separation you get "toyification" where everyone looks like a doll but this looks pretty natural to me. I had the cameras tilted down a bit so there is a quite a bit of detail at the nadir. With scenes like this with a lot to look at at the nadir it is more comfortable to be standing rather than sitting sometimes.
  • mediavrmediavr Posts: 234
    Art3mis
    Here is a slow motion test with my cameras at 48fps and played back at 24fps.
    http://www.reddit.com/r/oculus/comments/1vw43t/slomo_180_degree_3d_video_with_gopros_3_black/
  • CyborgMcloudCyborgMcloud Posts: 24
    Brain Burst
    I think this should also be relevant for stereoscopy video recording:

    http://www.indiegogo.com/projects/3d-webcam/x/6220875
  • mediavrmediavr Posts: 234
    Art3mis
    Here is a new 180 3d video for the Rift -- a large scale art installation
    http://www.reddit.com/r/oculus/comments/1yqchn/what_do_you_guys_think_about_a_virtual_reality/cfnr0w2

    This is with the Gopros side by side with one inverted -- giving the minimal interocular separation.
  • mediavrmediavr Posts: 234
    Art3mis
    Gopro recently released a new firmware version for 3+ Black -- with big enhancements in Protune including +/- EV controls. Which is good news. But the bad news is, according to the Gopro User forums, it is bricking some user cameras so they have withdrawn it for the time being.

    But to get back to good news .... that the firmware adds commands in the internal scripting language for the cameras that refer to 3d Backpacs for the camera i.e. an official Gopro solution for 3d syncing for Gopro 3+ Black
    https://gist.github.com/KonradIT/9494326

    Also there are USB control features in the new script commands -- so things are looking brighter for panoramic 3d Gopro solutions for the Rift
  • kclaikclai Posts: 18
    Hi, that github also very resourceful in manipulating the autoexec script, and I've asked Konrad to try making a HDR script for photo (https://github.com/KonradIT/autoexechack/tree/GoPro/HDRPhoto) which help taking fisheye shot alot. btw, are there any update to the hero 3 black 3D script? thx
  • mediavrmediavr Posts: 234
    Art3mis
    edited March 2014
    I notice Letus is making an anamorphic adapter for Gopro 3/3+ now which gives you wider coverage (for $200). You can adapt the case or clamp it directly to the Gopro lens (with an accessory clamp Letus sell). As well as giving an anamorphic stretch (which needs to tweaked in Gopro Studio for best pictorial results) it gives considerably wider horizontal coverage.
    http://letusdirect.com/cart/anamorphx-gp.html
    This is meant to be used horizontally but you could orient it vertically and get wider vertical coverage I think, making it a better option maybe for Rift lookaround videos.
    Also the clamp looks nicely made
    http://letusdirect.com/cart/anamorphx-gopro-lens-clamp.html -- a useful thing if you are into making customs lens shades for Gopros. Or you could find a small regular fisheye convertor, attach it to the clamp and put it on your Gopro to get circular 180 coverage without hacking your camera. Since the original Gopro 3+ lens is very excellent quality, with a quality fisheye adapter you still might get very good quality with the combination.
  • mediavrmediavr Posts: 234
    Art3mis
    Here is a new 180 3d video (of a political protest on a very wet day).
    https://www.dropbox.com/s/767c38i1a8ss6k1/protestsbs.mp4

    In VR Player

    Media/Format .... Side by Side
    Projection ... Dome
    Device/Layout ... Cross-eyed
    Tools/Settings/Display ... Horizontal Offset -42

    I am very happy with this one because I have worked out a way of getting better vertical alignment and it makes the depth much better in the nadir and zenith.

    PTGui Pro which I use for camera calibration and alignment, and format conversion, does a pretty good job ... but it lacks a feature in an early stitching program .. viz. "morph to fit" . But it will do it if you install the earlier program as a sort of a plugin.
    http://www.ptgui.com/ptguihelp/main_panoramaparams.htm
    You need to install PTStitcher and PTOptimizer and point to them in the Options in PTGui.
    http://www.ptgui.com/panotools.html
    Load your aligned equi L/R first frames into PTGui
    Set Image type to Rectilinear, fov 100/100 (I know this is not right, but it is a hack to make it work)
    Set Panorama type to Rectilinear, fov 105/100
    Set Optimizer to PTOptimizer.
    Set Stitcher to PTStitcher
    Set "morph to fit" to all control points in the Panorama tab
    Generate control points
    Select all control points in the Control point table and change type to Horizontal . (this is the salient bit, it forces all the L/R control point pair components to have equal height in the adjusted image pair)
    In the Optimizer tab optimize only the Yaw of the R image
    Delete outliers in the control points. Optimize again.
    Delete the L image and add all the rest of the R images and set the parameters to be identical to the first R image.
    Export as individual layers.

    (I know this is greek to all but panorama freaks but it is the only way I have found to get perfect vertical alignment with equi stereo video with Gopro footage)

    Btw for depth map extraction to be high quality vertical alignment is important I think.
  • mediavrmediavr Posts: 234
    Art3mis
    Google's Trekker Street View camera -- I photographed it last week with my rig in an industrial location
    http://www.reddit.com/r/oculus/comments/217okq/googles_trekker_portable_street_view_rig_in/

    The article I link to there says 15 cameras -- there is probably not a a lot of overlap but if they used wider lenses you could use this sort of setup for stereo capture too.

    Btw -- this is an interesting thing -- a Gopro tracker sensor device
    http://www.indiegogo.com/projects/gon-feel-for-gopro-camera-share-gps-motion-physics-onto-your-hd-sport-videos
    -- you would need a third Gopro to use it with a stereo rig. Tracks orientation among other things. You could use to post-stabilize Gopro footage very accurately. I am starting to think mobile cameras will work fine with the Rift if they are steady enough.
  • Does this type of setup enable you to "look around" within the panoramic video, using the rift? Would it be possible to do this during a live video feed?
  • kclaikclai Posts: 18
    The new Dual Hero sync cable for hero3 black will be out soon. Looking forward to modify for multiple gopro sync
  • mediavrmediavr Posts: 234
    Art3mis
    jonfaiella wrote:
    Does this type of setup enable you to "look around" within the panoramic video, using the rift? Would it be possible to do this during a live video feed?


    Yes you can "look around" and ("up and down") in 180 3d movies in the Rift (in VR Player) . Actually you might not want to look around particularly but just the freedom to have headtracking not run out of image is immersive.

    ... "live video feed" ...I dont know if there is a Player that can do that yet. VR Player can stream from an url but the latency is high. I suspect you might be able to do it soon in Firebox VRWeb.
  • trippedouttrippedout Posts: 11
    hey mediavr just curious if you've continued to work on this in the past month - the newest version of PtGui has a whole lot more controls than what i could figure out from what u wrote above and im struggling to get anything to look as good as that protest you posted.

    let me know if there is anyway way you'd be down to talk more specifics about it - tryin to do some cool stuff now :D
  • uvflyeruvflyer Posts: 134
    If I may ask a question. What do you guys suggest if I want to make 3d videos for the vrcinema in terms of placement, horizontal or vertical? And can I seperate the camera's more than the human eye, or will that result in a strange depth feeling?
  • vcarvcar Posts: 4
    Hi mediavr, I am very eager to know how you make your stereo movie using gopro3 camera? As far as I know, the video creation process would be:
    1. Extract every single frame from captured video stream.
    2. Use PTGUI or some program similiar to do the stitch parameter estimation, and batch process all the frames.
    3. Re-generate the video files from the stitched images.
    I would like to know whether there exist some tools can handle these steps more intelligently.....
    mediavr wrote:
    Here is a 180 equirectangular stereo movie done with a twin Gopro 3+ Black rig
    https://www.dropbox.com/s/gslyccr43c8whwy/eveleighmarkets.mp4

    In VR Player under Media you need to set Format to Side by Side and Projection to Dome

    Until recently there was no way to get good synchronization reliably with recent Gopros for stereo but there is now a sync cable you can buy from http://3dguy.tv/ which works well. I am not sure if the concept behind it can be extended to work with more than 2 cameras

    Basically my rig for this video looks like this http://www.mediavr.com/gopro3plusfisheyestereorig.jpg
    with replacement Sunex lenses to get about 180 by 150 degree coverage on the 1920 by 1440 format on the Gopros

    It is very simple to shoot 3d for the Rift with this because all you need to do is hold the camera level and point it generally in the right direction.

    For more accurate composition I can plug a Gopro LCD Backpak into the cable or I can plug a 7" monitor into the HDMI socket of one or other of the Gopros -- I have this one
    http://www.ebay.com.au/itm/FEELWORLD-7-TFT-LCD-HDMI-Monitor-FW678-HD-O-W-Sun-Shield-Shoe-Mount-f-Camera-/141125167872?pt=LH_DefaultDomain_15&hash=item20dbb72b00&_uhb=1

    With two LCD Backpaks connected you can get stereo previewing of the video if you arrange some optics (spare Rift lenses maybe).
  • mediavrmediavr Posts: 234
    Art3mis
    I'm still working on Gopro stuff. Finally the Gopro sync kit for Gopro 3+ black is available from Gopro directly (but not in shops yet).
    http://www.stereoscopynews.com/hotnews/3d-cinema/shooting-cameras-rigs/3693-gopro-dual-hero-housing-and-sync-cable-are-available.html

    I got mine yesterday -- aka the Dual Hero System. It gives sync for all video modes, stills and time lapse stills. I have been working a lot with gimbal stabilizer tech -- see the thread in this subsection. It makes me think you can video moving around much more and still be able to watch Gopro 3d in the Rift comfortably if it is steady enough.

    Re workflows. The most recent description in this thread about "morph to fit" vertical disparity removal in PTGui is I am afraid not really applicable to Rift processing Ive decided (though it is good to use for showing equirectangular panoramic stereo on 3d tvs etc). I think PTGui plus After Effects is still the way to go though. The main thing is to use standard PTGui (or Hugin) optimization to get distant areas of L and R equirectangulars aligned very exactly (vertically and horizontally) and not worry about vertical alignment for closer foreground areas . The reason being that when you take those equirectangulars and view them in VR Player as rectilinear views say then those same views in rectilinear perspective have good alignment close and far - if they are not yawed too much to the left or right. With a 180 equirectangular pair there are more basic issues preventing good alignment in views much to the L or R especially up and down views. It is hard to demonstrate these issues online without making anaglyph versions and most people dont have anaglyph glasses.

    I will write a detailed list of my current PTGui/After Effects workflow steps soon.
  • mediavrmediavr Posts: 234
    Art3mis
    Here is an example of the Gopro Dual Hero System (with my Sunex equipped Gopros and using my gimbal stabilizer).

    http://www.reddit.com/r/oculus/comments/25xwuq/gopro_dual_hero_system_now_available_good_for/

    It is really great to be able finally to rely on very perfect sync for fast action subjects (dancing here)!
  • eraynaieraynai Posts: 5 Oculus Start Member
    Hi,

    Based on this very interesting thread, I have a few questions as I'm a bit new to this. I just purchased the dual hero system so that I can sync my two gopro hero 3+'s. My main question is...does having the two 180 fisheye lenses and steady camera moves using a gimbal enough to make the 3D video feel immersive in the oculus or do I really have to find a way to stitch everything together using panoramic equipment on a tripod.

    Any advice you can give would be wonderful,

    Thanks,
    Elli
  • jayserpjayserp Posts: 3
    NerveGear
    eraynai wrote:
    Hi,

    Based on this very interesting thread, I have a few questions as I'm a bit new to this. I just purchased the dual hero system so that I can sync my two gopro hero 3+'s. My main question is...does having the two 180 fisheye lenses and steady camera moves using a gimbal enough to make the 3D video feel immersive in the oculus or do I really have to find a way to stitch everything together using panoramic equipment on a tripod.

    Any advice you can give would be wonderful,

    Thanks,
    Elli

    Also new to this but I'll try to answer based on my understanding so far... the two 180 fisheye lenses will work to give you presence in a single direction, however, without the correction for the distortion, you won't get a perfect 1:1 mapping of real world to rift. However, you should still be able to get a good sense of presence.

    I'm currently working on a 3D video player and am able to map both a single fisheye video and full 360 video (4 fisheyes stitched together) to a dome in Unity. If anyone here is able to get some 3D fisheye footage, I would appreciate any content. Out the country for the moment, so no Oculus and no easy way to get hold of the equipment I need so any help is welcome :)
  • kclaikclai Posts: 18
    Hi Peter, this is my experimental 3D walkthrough video with dual full circular fisheye gopro using the same approach.
    http://vrplayer.tv/archives/480

    Best to view the 4K version in VRPlayer. I filled the 2nd half sphere with some deco for making it more enjoyable :) next time I shall not taking the sun into the fisheye lens as it's very difficult to grade a nice color in the post.

    And here is my adjustable rig: http://ge.tt/625pkuj1/v/0?c

    btw, as long as the frames were remapped in PTGUI, this is how I get perfect sync without the 3D cable: when the gopro were started by the wifi remote, I fired a quick flash light at the beginning. When I've converted the video into frames, I put the L/R frames in different folders. Then pick the frame with all white-out as the new starting point and bulk rename the image series with a script. This will garantee the sync easily.

    The new PTGui 10 use OpenCL for accelerating the stitching. The performance jump 10X that is now comparable to the other GPU stitchers.

    Cheers,
    KC
  • mediavrmediavr Posts: 234
    Art3mis
    Hi KC
    I had a problem using Keepvid to download the video
    The website you are trying to download from ( keepvid.com ) is not supported by KeepVid at the moment. If you would like to download from this site, feel free to e-mail us a request for this site to be added.

    you motivated me to get the PTGui upgrade -- batch processing speed is important with this stuff :-)

    The lenses look like the Ragecam 1.4
    http://ragecams.com/shop/14mm-circular-fish-lens-hero3-panoramic-view-p-535.html?osCsid=f563cb20400afa9fa031f0642511a419

    Is that what they are? Or some other brand? I would be interested to see some stills with it if you have some.

    Sync with your method will get to within a frame but for fast action you probably need more. The Dual Hero System is
    great but you dont have the flexibility of having any separation you like.

    [edit] I got to see it in the end -- with another downloader -- and it works ok. The alignment is good . The 180 panorama of the car as a kind of viewing platform is a good idea -- but it would be better if it was stereo too. The video itself seems very soft. Maybe your lenses need more focusing or a lot of software sharpening. I shoot in Gopro Protune mode where the video is very soft and find I have to do this to get sharp looking videos -- Unsharp Mask, 1.4 pixels, 200% then I use Gaussian Blur Horizontal 0.4 pixels, Gaussian Blur Vertical 0.7 pixels, then Unsharp Mask again 1.0 pixel 50% (in After Effects) -- in a Filter stack.
  • kclaikclai Posts: 18
    Hi Peter,

    I'm not using the 1.4mm lens from ragecam. I got one but the quality was not ok. (http://ge.tt/8sETg5m1/v/0 , the one at top-right corner) I took it for a lab test and it was marginnally rated to 1MP, waste of $$. At the end I crafted my own lens, 1.39mm 10MP. Getting the optimal focus is a tedious job as I cannot see the fine details with the HDMI output or the wifi app. Changing the gopro lens by violence may distort the mounting screw and may resulted in partial focus (e.g. only half of the image wwas in focus, the remaining half was in total blur). I have to buy some repair parts to get them working again.

    The output from Protune was not sharp and I have to make some adjustments in the gopro studio. Converting to equirectangular make it even softer. anyway shooting in direct sunlight was my mistake as the color would hurt no matter how I did in the post. I've tried sharpening the image as you instructed, and it looks better. see the comparison here:
    http://ge.tt/2BWEj5m1

    Cheers,
    KC
  • mediavrmediavr Posts: 234
    Art3mis
    Can someone check this Youtube video in a Rift please?
    https://www.youtube.com/watch?v=zhflLzmOxwM (watch fullscreen and HD)

    It is a test for using greater than normal fov images for non-interactive Youtube 3d Rift videos. Is it comfortable to see in 3d? It is from 180 degree fisheyes converted to stereographic perspective (less barrel distortion with extreme angles). The view in the Rift is 20 or 30 degrees wider than normal. On the Reddit forum there was a report it was difficult to view.
  • mediavrmediavr Posts: 234
    Art3mis
    Kclai said
    Getting the optimal focus is a tedious job as I cannot see the fine details with the HDMI output or the wifi app. Changing the gopro lens by violence may distort the mounting screw and may resulted in partial focus (e.g. only half of the image wwas in focus, the remaining half was in total blur). I have to buy some repair parts to get them working again
    .

    The only way I have found to accurately focus these lenses is to make marks every couple of mm around the circumference and do test still photos at the different settings and look at them closely.
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