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Specifications and tools for 360º video and spatial audio.
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Question VR180 meta in st3d, sv3d #220

Open dreamcancometrue opened 5 years ago

dreamcancometrue commented 5 years ago

How can i distinguish between VR180 (Stereo LEFT AND RIGHT) and VR360(stereo LEFT AND RIGHT) in st3d, sv3d meta data(v2 RFC spec.)?

What is the difference VR180 (Stereo LEFT AND RIGHT) and VR360(stereo LEFT AND RIGHT) in st3d, sv3d meta data(v2 RFC spec.)?

wuchangchang commented 5 years ago

st3d have the same meaning for VR180 and VR360, and their difference is in content of the proj box inside sv3d.

VR360 typically uses an 'equi' box corresponding to 360x180 (yet, a 360x180 'mesh' is allowed). VR180 could use either 'mshp' box (fishey meshes or cropped equirect mesh) or 'equi' box (cropped equirect).

dreamcancometrue commented 5 years ago

@wuchangchang Thanks for your advice! I understood that VR360 and VR180 can use 'equi' box, VR180 should change projection_bounds_left, projection_bounds_right (in equi box) to show VR180 cropped quirect. Is it right?

dreamcancometrue commented 5 years ago

I wonder how to represent the fov difference of VR180 and VR360 in RFC spec.