As a result of examining 10 each of Monoscopic and Stereoscopic videos of 360 videos, most of them (about 80%) became the format distribution shown in the table.
| Resolution | AV1 HFR High | AV1 HFR | AV1 | VP9.2 HDR HFR | VP9 HFR | VP9 | H.264 HFR | H.264 |
|---|---|---|---|---|---|---|---|---|
| MP4 | MP4 | MP4 | WebM | WebM | WebM | MP4 | MP4 | |
| 4320p | 402/571 ---/EQU |
272 --- |
--- |
|||||
| 2160p | 701 --- |
401 EQU |
337 --- |
315 EAC |
(313) EAC |
(305) --- |
(266) --- |
|
| 1440p | 700 --- |
400 EQU |
336 --- |
308 EAC |
(271) EAC |
(304) --- |
(264) --- |
|
| 1080p | 699 --- |
399 EQU |
335 --- |
303 EAC |
(248) EAC |
299 EAC |
(137) EAC(*EQU) |
|
| 720p | 698 --- |
398 EQU |
334 --- |
302 EAC |
247 EAC(*EQU) |
298 EAC |
136 EAC |
|
| 480p | 697 --- |
397 EQU |
333 --- |
244 EAC |
135 EAC |
|||
| 360p | 696 --- |
396 EQU |
332 --- |
243 EAC |
134 EAC |
|||
| 240p | 695 --- |
395 EQU |
331 --- |
242 EAC |
133 EAC |
|||
| 144p | 694 --- |
394 EQU |
330 --- |
278 EAC |
160 EAC |
---: Nothing
EQU: Equirectangulr
EAC: Equi Angular Cubemap
In some videos, 137 and 247 were Equirectangulers with metadata.
Metadata refers to Spherical Video (V2).
example
https://www.youtube.com/watch?v=533QhqMQWQ4
https://www.youtube.com/watch?v=-_nhjmLeGYw
https://www.youtube.com/watch?v=1Jo4U-a7YkQ All formats in this video were Equirectangular with metadata.
This format is often used for 360 videos (images).
Youtube's Stereoscopic Equirectangular uses Top and Bottom (Over Under) (Left Eye Top).
Youtube uses a 360-degree video format called "Equi Angular Cubemap" in addition to Equirectangular. Equi Angular Cubemap has the feature that artifacts that occur directly above and below are less likely to occur in Equirectangular.
The 6 faces of the Cube are arranged in two rows, top and bottom, and during playback, the upper and lower rows are combined like a baseball to form a Cube. However, if you paste it on the Cube mesh, the angle will stand out, so actually paste it on the Sphere mesh and play the video.
The format is a Monoscopic Equivalent Angular Cubemap rotated 90 degrees to the left and arranged side by side (the left is the left eye).
