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In plane geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles.
Table of contents
- Table of Contents
- Theta In Matlab
- The Difference Between Doing a 180 and a 360
- OpenSCAD User Manual/The OpenSCAD Language - Wikibooks, open books for an open world
Not too noticeable, until you notice them, and then they stick out like a sore thumb. Anyways, awesome work you're doing. Your player is definitely the best I've used for the Rift, so thank you for your hard work!! So until they have tools to generate their Cube at the source, it will look worse. That is true about the re-encoding worsening the quality.
For some of the videos I've produced, I render at x, and upload it to YouTube at Mbps, so by the time YouTube does it's encoding for streaming, the quality hit when played at s60 won't look too bad. But yeah, anytime an encoding happens, quality is going to be lost unless you're encoding losslessly, but that's waaaay too large of a bitrate to be viable.
Yeah, hopefully the EAC format either a goes away or b becomes so big that it becomes a standard for all software for panoramic videos. I'll post again in a week or so to confirm or deny today's findings. Cubemap video is an open standard too, just not as common. Cubemaps' advantage vs. The disadvantage is that the stored image no longer makes intuitive visual sense to a human. Oh yeah, I fully realize and can appreciate the advantages that cubemap projection has over equirectangular.
The problem lies in the following:. Then, YouTube needs to allow videos that are in EAC format to be able to be uploaded to YouTube at a good high bitrate for YouTube to re-encode into the different quality levels that they do. This defeats the whole purpose of the EAC format to begin with, because you're starting with a potentially lower quality source and encoding it into a higher grade format.
I like the metaphor someone used on the Oculus Rift Reddit forums comparing it to someone who re-encodes a kbps mp3 file to kbps The quality isn't going to get any better!
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And every re-encode just makes the quality worse, so these EAC re-encodes just end up making the video blurrier than if it had just remained in its equirectangular original. Animation is still relegated to equirectangular. I have the same issue, but I can download the normal format with Chrome and a Chrome extension named "youtube video downloader" it was already disabled and removed from Chrome extension shop.
I am so strange why youtube-dl download this in invaild format but this extension can do in right. I have tried to download few videos over the last week and I've always found them to use the new EAC cubemap format. Cyroxchan Thanks for the clarification. I was able to download videos in Equirectangular format even for videos which were uploaded prior to Jan However in order to do that, you have to pass a blank "browser user-agent".
If you pass any "browser user-agent" for eg.
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Mozilla 4. I was able to pass a blank "browser user-agent" via a custom C script. As per the google article about pixel densities, you see the green an blue is at top and bottom of picture. You just need to set the viewport to reflect the change. Solve it, in Unity and a little bit of Video editing. I am working now to create a small tool that can import the video you download from Youtube and convert it to Equilateral format. Uncleout Yes, but is not a stable solution Need a conversion from unity again to Equilateral.
Found a solution, thanks to priteshdesai Two programs that work to download the videos:. Using Virtual Desktop, I could play the videos and they don't wrap or chop incorrectly, seems these programs are downloading older versions of the YouTube video and they aren't formatted the new way. Hi everyone, Really interesting reading this thread. So what was the end result did we find a way to download the full 4k video from any youtube video in the original equirectangular format?
Also Is there a way to download just the 2D version in the fullest quality of the video or does it always have to be the 3D version if this is what is available? Would appreciate any help. The Unity player, only displays regular 6 cubemap videos properly.
Theta In Matlab
The YT cubemap isn't natively supported. I'm on this path at the moment, trying to get it to work in Unity myself. I managed to get the transformations to get the right faces into the right locations, but now it's the warping that I have to fix. Part one with faces: Font, left, Right B. Part two with faces: up, back, down.
The Difference Between Doing a 180 and a 360
In a video editing software, I cut the video in half on horizontal, so I got two videos for A and B. I mapped them in Unity with video player and put the camera inside the cube, it works. It works on some videos, but still has a problem with lens since is cube seen with a curved lens. That sounds like what I have so far, except I've done it with a single shader on a single cube or, as of right now, the skybox.
The problem is, it's still distorted because I'm not applying the mapping required to undo the EAC mapping. We can all contribute to it and make it available for all. Now my skybox code has the correct transform to undo the EAC mapping, but the faces don't quite align correctly. I'm assuming YouTube adds some bleed somewhere and that this bleed isn't documented in anything that I've read so far so I don't know how to avoid it when transforming.
The current release is here. The code in there is written for CG but may apply for any C-like language which wants to do similar calculations. The other option was to use the new mesh standard. I had two problems with using this for my own project:. They had documented how to make a custom mesh, and talked about how little space the EAC mesh took up, but didn't mention the actual layout of the EAC mesh itself. I really wanted the image on the actual skybox, and couldn't see any way to get a mesh in there anyway.
Not using the mesh standard may even be why there is a minor issue with alignment still. I'm hoping that getting this initially version out there will encourage some sharing of solutions. So, I'm probably a little late to the game here, but thanks to the work and explanations of priteshdesai and j0hj0h the solution has been discovered!
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Now, on to another YouTube VR-video-related issue! The VR format has some hidden streams that are not being picked up by youtube-dl. Link to issue here: The trap there is that the equirectangular copy can be a lot fuzzier than the EAC copy. This is why I spent time to make a player specifically for the layout I was getting.
Best copies are and I think you'll be pleasantly surprised to find that by passing --user-agent '' , the stream is no longer EAC, but Equirectangular! In the second list, stream is And yeah, the for 30fps or for 60fps stream is in almost all cases the best quality version to download -- the vp9 codec is vastly superior in quality compared to the avc1 codec. Stream is as sharp in Equirectangular as it is in EAC. Yeah, OK. It does send a different video after all. So my only concern left is the quality, right?
Both videos are packing the information into x, but the EAC one should be fitting better quality in the same size. Assuming that they introduced it for this reason, which seems to be what the blog posts are claiming.
OpenSCAD User Manual/The OpenSCAD Language - Wikibooks, open books for an open world
For sure, the EAC one should, in theory be better quality. It really all depends on the size and quality of the original upload. If, for example, the author uploaded their video at x resolution in equirectangular format, then there is essentially no way the EAC version of the video at x is going to be better quality. If the author uploaded the video at a higher resolution, say x resolution in equirectangular format, then the EAC version of the video at x could end up better quality than an equirectangular one at the same resolution.
EAC has its merits for sure, but it's not universally accepted. Until it is, I'll prefer my locally saved files in equirectangular. At s and below, the old equirectangular format only is used.