Since the MAX launched 2 years ago, adoption of EAC in the world of video has been slow.
Once more tools start to support EAC, we will be able to skip this conversion step altogether and save even more time since no reprojection is needed.
#Gopro vr player view vr mp4
mp4 in GoPro’s software.Īnd finally, the blended equirectangular mp4 frame looks like this: However, the blending (removal of the stitch lines) using this overlap is done in post processing when you convert the. The GoPro stitches these 2 EAC tracks (example frames above) on the camera. The images below shows overlap areas outlined in red. While the stitching is completed in MAX, the blending is enhanced by retaining a small overlap in post With MAX, we are proud to say we are again setting the bar by retaining the small overlapped areas inside the EAC projection. The reality is, although it might be easy to playback (from a computational point of view), no other players as far as I am aware (except GoPro’s own software) understands this codec correctly to play it back. We built a special player that can decode both streams in real time and re-project them into a sphere. 360 format consists of two video tracks (the top and bottom of the EAC projection). Even then, this is too large as one file for decoders (according to GoPro), hence the. 4032x1344 is very easy for all UHD decoders play back.Īs noted before, the MAX shoots at 6K but the stitched resolution of the EAC image is smaller at 5.6K (the MAX does this on camera). I wrote a post last week providing an explanation of various projection types, EAC being one.īut GoPro then went one step further to account for issues a decoder would face when playing the video…īy breaking the top and bottom faces of the cube map into two separate video tracks, this creates two videos at the resolution of 4032x1344. EAC has a 25 percent drop in pixels for the same resolution as equirectangular. The best projection for this is Google’s Equal Area Cubemap, or EAC. GoPro posted a nice summary of the goals they set out for the MAX camera, and how they achieved them, here.įor example, once you have a 5.6K stitched equirectangular video, that is equivalent to a resolution of 5376x2688, which is near impossible to encode with a modern encoder and, to make things more challenging, most high-end devices (PCs and smartphones alike) struggle to decode such a large file.Īs suspected, encoding and decoding such large equirectangular images was the key driving force behind the creation of the. The MAX is the only camera that currently uses it as an output format.
360 format was released with the launch of the GoPro MAX camera. I decided to take a deeper look and see if it was possible to remove the GoPro middleman and improve the user experience in converting them into mp4’s.
360 format is used as a more efficient codec to capture high-quality / high-frame-rate videos than would otherwise be possible (see my post on FPS, Bit rate, Compression and 360 Video Quality). Limited functionality based on GoPro’s feature choices.
#Gopro vr player view vr software
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