VideoFileSphericalMetadataEquirectProjection

Specifies usage of equirectangular projection. More specifically, these are the proportion of projection cropped from each edge not covered by the video frame. For uncropped frame, all values are 0. For v1 metadata, this contains CroppedArea information (CroppedAreaLeftPixels, CroppedAreaTopPixels, CroppedAreaImageWidthPixels, CroppedAreaImageHeightPixels)

VideoFileSphericalMetadataMeshProjection

Specifies usage of mesh projection. "content" contains the mshp atom: version/flags, CRC, compression method, description of the mesh(es) (vertices, coordinates corresponding to each vertex, and vertex lists to describe the projection). See go/pir-spec for mshp atom data layout.