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xmar / 360Transformations

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Record all face of cubemap projection #16

Open phunm211 opened 7 years ago

phunm211 commented 7 years ago

When I set value of "useTile" is true in CubeMapCompact type, I've received only one video of front face. How can I get the other face?

xmar commented 7 years ago

Hi, The useTile option encode the different faces into different video tracks inside the same mkv container. Here we do not encode the video with the hevc tile. If you look inside your mkv output file you should observe 6 video tracks.

phunm211 commented 7 years ago

Yep I've seen that but I can't use this output file as a CubeMapCompact video to calculate its MS-SSIM point. So if I set layoutFlow is

"layoutFlow= [["../input_equi.mp4", "Equirectangular", "FlatFixed"], ["../input_equi.mp4", "Equirectangular", "CubeMapCompact", "FlatFixed"]]"

and I set "useTile = true" then I change the ratio of bitrateFront,bitrateBack,etc.. . Is my solution correct? Thanks

xmar commented 7 years ago

Hello,

In fact if you define the flow ["../input_equi.mp4", "Equirectangular", "CubeMapCompact", "FlatFixed"], the cubeMap video with the « tiles » will never be encoded and stored on the disk. Only a projection from Equirectangular to CubeMapCompact will happen. If you want to compress the video with different bitrate budget per tile then you need first to run this flow ["../input_equi.mp4", "Equirectangular", "CubeMapCompact"]. This will generate a video file with the « tiled » cubemap projection encoded inside. Then you should compute the MS-SSIM by using this flow: [["../input_equi.mp4", "Equirectangular", "FlatFixed"], ["../yourCubeMapOutputFile", "CubeMapCompact", "FlatFixed"]].

phunm211 commented 7 years ago

I've followed your instruction and Terminal get an error: "Segmentation fault (core dumped)". So how can I solve that? Thanks.