Why is the bit rate of the video with some high-quality areas and some low-quality areas higher than that of the original input video?

[Cassie-yuxiao]

Dear all,
Try to running the examples using the dockerized module:
xiaoyu@xiaoyu-virtual-machine:~/Desktop/360Transformations-master/transformation$ docker run --privileged --rm -v /home/xiaoyu/Desktop/360Transformations-master/transformation/examples:/home/trans360 trans360 trans -c Config_14.2.ini

The input video I used is input.mp4 provided by the website:
https://user-images.githubusercontent.com/64078936/119604871-605ff900-be22-11eb-9069-752b90eadd44.mp4

The following is the configuration file information for generating a video with some high-quality areas and some low-quality areas：

Config_14.txt

`[Global]
;output fps
fps=24
;Names of the Section for the layout flow: [[Equirectangular, CubeMap, FlatFixed], [Equirectangular, FlatFixed]] means: from Equirectangular to CubeMap to FlatFixed AND from Equirectangular to FlatFixed
layoutFlow= [["input.mp4", "Equirectangular", "EquirectangularTiled"]]
;if displayFinalPict is set, it will display the final picture of each flow for each input picture of the original video
displayFinalPict=false
;if not empty, a video will be recorded for each flow using the path + the file name given here (the file name will be unique per flow).
videoOutputName=output14_.mp4
;bitrate goal of the output video in kbps
videoOutputBitRate=0
;videoOutputName=
qualityOutputName =
; qualityToComputeList = ["MS-SSIM", "SSIM", "PSNR", "S-PSNR-NN", "S-PSNR-I", "WS-PSNR"]
qualityToComputeList = []
;["S-PSNR-NN", "S-PSNR-I"]
nbFrames= 25
startFrame= 0

[Equirectangular]
;type of the layout: equirectangular is the state-of-the-art equirectangular layout
type=equirectangular
upscale=false
;Width of the reference equirectangular video
refWidth=3840
;Width of the reference equirectangular video
refHeight=2048
;yaw, pitch, roll of the center point of the equirectangular video (in degree)
rotation= {"type":"euler", "yaw":0.0, "pitch":0.0, "roll":0.0}
;if true, the resolution of the layout is compute based on the resolution of the previous layout (or on the resolution of the reference equirectangular video)
relativeResolution=true
;if relativeResolution=true ratio of the output layout width compare to the reference video; otherwise width size of the output video in pixel number
width=1
height=1
;bitrate ratio of the output video relative to the videoOutputBitRate (if it is the final layout and if the video is encoded).
bitrate=1

[EquirectangularTiled]
type=equirectangularTiled
;Size of the reference input equirectangular video
refWidth=3840
refHeight=2048
;use relative resolution for the face resolutions
relativeResolution=true
;The rotation used to get the center of the front face: type = "euler" or "quaternion" or "angleAxis".
; if type is "euler" you have to give the yaw, pitch and roll angle in degree
; if type is "quaternion" you have to give the w, x, y, z value of the quaternion that represente the rotation. A normalization is performed by the software.
; if type is "angleAxis" you have to give an "angle" in degree and a direction vector x, y, z that generates the rotation axis (this vector should not be (0, 0, 0)).
rotation= {"type":"euler", "yaw":0.0, "pitch":0.0, "roll":0.0}
;rotation= {"type":"quaternion", "w":1.0, "x":0.0, "y":0.0, "z":0.0}
;rotation= {"type":"angleAxis", "angle":90, "x":0, "y":0, "z":1}
;nbHTiles (resp. nbVTiles) indicate the number of horizontal (resp. vertical) tiles
;You have to compile the software with the RANGE_NB_H_TILES and RANGE_NB_V_TILES macro to be able to use this layout.
;For instance in this example the value 8 should be in the macro RANGE_NB_H_TILES and RANGE_NB_V_TILES otherwise a runtime error will be raised
nbHTiles=8
nbVTiles=4
;hTileRation_X and vTileRation_X indicate the relative horizontal and vertical ratio of the tile X. In this example each tile get 1/8 of the equirectangular picture
hTileRation_0=1
hTileRation_1=1
hTileRation_2=1
hTileRation_3=1
hTileRation_4=1
hTileRation_5=1
hTileRation_6=1
hTileRation_7=1
vTileRation_0=1
vTileRation_1=1
vTileRation_2=1
vTileRation_3=1
vTileRation_4=1
vTileRation_5=1
vTileRation_6=1
vTileRation_7=1
;if upscale is set to true, all the tiles will be upscaled to the original tile resolution
upscale=true
;if useTile is set to true, each face will be encoded into an independent video with a target bitrate set by the equirectangularTileBitrate_0_0, equirectangularTileBitrate_0_1, etc. parameters
;if useTile is set to false, the whole projection will be encoded into a unique video (all faces on the same frame) and a global bitrate target set by the bitrate parameter
useTile=false
;resolution of the tile (i,j)=(0,0)
equirectangularTile_0_0=0.25
; bitrate of the tile (i,j) = (0,0). Ratio of r means rvideoOutputBitRate/64
equirectangularTileBitrate_0_0=1
equirectangularTile_0_1=0.25
equirectangularTileBitrate_0_1=1
equirectangularTile_0_2=0.25
equirectangularTileBitrate_0_2=1
equirectangularTile_0_3=0.25
equirectangularTileBitrate_0_3=1
equirectangularTile_1_0=0.25
equirectangularTileBitrate_1_0=1
equirectangularTile_1_1=0.25
equirectangularTileBitrate_1_1=1
equirectangularTile_1_2=0.25
equirectangularTileBitrate_1_2=1
equirectangularTile_1_3=0.25
equirectangularTileBitrate_1_3=1
equirectangularTile_2_0=0.25
equirectangularTileBitrate_2_0=1
equirectangularTile_2_1=1
equirectangularTileBitrate_2_1=1
equirectangularTile_2_2=1
equirectangularTileBitrate_2_2=1
equirectangularTile_2_3=0.25
equirectangularTileBitrate_2_3=1
equirectangularTile_3_0=1
equirectangularTileBitrate_3_0=1
equirectangularTile_3_1=1
equirectangularTileBitrate_3_1=1
equirectangularTile_3_2=1
equirectangularTileBitrate_3_2=1
equirectangularTile_3_3=1
equirectangularTileBitrate_3_3=1
equirectangularTile_4_0=1
equirectangularTileBitrate_4_0=1
equirectangularTile_4_1=1
equirectangularTileBitrate_4_1=1
equirectangularTile_4_2=1
equirectangularTileBitrate_4_2=1
equirectangularTile_4_3=1
equirectangularTileBitrate_4_3=1
equirectangularTile_5_0=0.25
equirectangularTileBitrate_5_0=1
equirectangularTile_5_1=1
equirectangularTileBitrate_5_1=1
equirectangularTile_5_2=1
equirectangularTileBitrate_5_2=1
equirectangularTile_5_3=0.25
equirectangularTileBitrate_5_3=1
equirectangularTile_6_0=0.25
equirectangularTileBitrate_6_0=1
equirectangularTile_6_1=0.25
equirectangularTileBitrate_6_1=1
equirectangularTile_6_2=0.25
equirectangularTileBitrate_6_2=1
equirectangularTile_6_3=0.25
equirectangularTileBitrate_6_3=1
equirectangularTile_7_0=0.25
equirectangularTileBitrate_7_0=1
equirectangularTile_7_1=0.25
equirectangularTileBitrate_7_1=1
equirectangularTile_7_2=0.25
equirectangularTileBitrate_7_2=1
equirectangularTile_7_3=0.25
equirectangularTileBitrate_7_3=1
;bitrate is used only if useTile=false. A ratio r means a bitrate of rvideoOutputBitRate
bitrate=1`

The bit rate of the resulting video is 3945kb/s.
https://user-images.githubusercontent.com/64078936/119604825-48887500-be22-11eb-99fc-a8caada05150.mp4

The following is the configuration file information for obtaining a video with full quality in all areas：
Config_14.2.txt

`[Global]
;output fps
fps=24
;Names of the Section for the layout flow: [[Equirectangular, CubeMap, FlatFixed], [Equirectangular, FlatFixed]] means: from Equirectangular to CubeMap to FlatFixed AND from Equirectangular to FlatFixed
layoutFlow= [["input.mp4", "Equirectangular", "EquirectangularTiled"]]
;if displayFinalPict is set, it will display the final picture of each flow for each input picture of the original video
displayFinalPict=false
;if not empty, a video will be recorded for each flow using the path + the file name given here (the file name will be unique per flow).
videoOutputName=output14.2_.mp4
;bitrate goal of the output video in kbps
videoOutputBitRate=0
;videoOutputName=
qualityOutputName =
; qualityToComputeList = ["MS-SSIM", "SSIM", "PSNR", "S-PSNR-NN", "S-PSNR-I", "WS-PSNR"]
qualityToComputeList = []
;["S-PSNR-NN", "S-PSNR-I"]
nbFrames= 25
startFrame= 0

[Equirectangular]
;type of the layout: equirectangular is the state-of-the-art equirectangular layout
type=equirectangular
upscale=false
;Width of the reference equirectangular video
refWidth=3840
;Width of the reference equirectangular video
refHeight=2048
;yaw, pitch, roll of the center point of the equirectangular video (in degree)
rotation= {"type":"euler", "yaw":0.0, "pitch":0.0, "roll":0.0}
;if true, the resolution of the layout is compute based on the resolution of the previous layout (or on the resolution of the reference equirectangular video)
relativeResolution=true
;if relativeResolution=true ratio of the output layout width compare to the reference video; otherwise width size of the output video in pixel number
width=1
height=1
;bitrate ratio of the output video relative to the videoOutputBitRate (if it is the final layout and if the video is encoded).
bitrate=1

[EquirectangularTiled]
type=equirectangularTiled
;Size of the reference input equirectangular video
refWidth=3840
refHeight=2048
;use relative resolution for the face resolutions
relativeResolution=true
;The rotation used to get the center of the front face: type = "euler" or "quaternion" or "angleAxis".
; if type is "euler" you have to give the yaw, pitch and roll angle in degree
; if type is "quaternion" you have to give the w, x, y, z value of the quaternion that represente the rotation. A normalization is performed by the software.
; if type is "angleAxis" you have to give an "angle" in degree and a direction vector x, y, z that generates the rotation axis (this vector should not be (0, 0, 0)).
rotation= {"type":"euler", "yaw":0.0, "pitch":0.0, "roll":0.0}
;rotation= {"type":"quaternion", "w":1.0, "x":0.0, "y":0.0, "z":0.0}
;rotation= {"type":"angleAxis", "angle":90, "x":0, "y":0, "z":1}
;nbHTiles (resp. nbVTiles) indicate the number of horizontal (resp. vertical) tiles
;You have to compile the software with the RANGE_NB_H_TILES and RANGE_NB_V_TILES macro to be able to use this layout.
;For instance in this example the value 8 should be in the macro RANGE_NB_H_TILES and RANGE_NB_V_TILES otherwise a runtime error will be raised
nbHTiles=8
nbVTiles=4
;hTileRation_X and vTileRation_X indicate the relative horizontal and vertical ratio of the tile X. In this example each tile get 1/8 of the equirectangular picture
hTileRation_0=1
hTileRation_1=1
hTileRation_2=1
hTileRation_3=1
hTileRation_4=1
hTileRation_5=1
hTileRation_6=1
hTileRation_7=1
vTileRation_0=1
vTileRation_1=1
vTileRation_2=1
vTileRation_3=1
vTileRation_4=1
vTileRation_5=1
vTileRation_6=1
vTileRation_7=1
;if upscale is set to true, all the tiles will be upscaled to the original tile resolution
upscale=true
;if useTile is set to true, each face will be encoded into an independent video with a target bitrate set by the equirectangularTileBitrate_0_0, equirectangularTileBitrate_0_1, etc. parameters
;if useTile is set to false, the whole projection will be encoded into a unique video (all faces on the same frame) and a global bitrate target set by the bitrate parameter
useTile=false
;resolution of the tile (i,j)=(0,0)
equirectangularTile_0_0=1
; bitrate of the tile (i,j) = (0,0). Ratio of r means rvideoOutputBitRate/64
equirectangularTileBitrate_0_0=1
equirectangularTile_0_1=1
equirectangularTileBitrate_0_1=1
equirectangularTile_0_2=1
equirectangularTileBitrate_0_2=1
equirectangularTile_0_3=1
equirectangularTileBitrate_0_3=1
equirectangularTile_1_0=1
equirectangularTileBitrate_1_0=1
equirectangularTile_1_1=1
equirectangularTileBitrate_1_1=1
equirectangularTile_1_2=1
equirectangularTileBitrate_1_2=1
equirectangularTile_1_3=1
equirectangularTileBitrate_1_3=1
equirectangularTile_2_0=1
equirectangularTileBitrate_2_0=1
equirectangularTile_2_1=1
equirectangularTileBitrate_2_1=1
equirectangularTile_2_2=1
equirectangularTileBitrate_2_2=1
equirectangularTile_2_3=1
equirectangularTileBitrate_2_3=1
equirectangularTile_3_0=1
equirectangularTileBitrate_3_0=1
equirectangularTile_3_1=1
equirectangularTileBitrate_3_1=1
equirectangularTile_3_2=1
equirectangularTileBitrate_3_2=1
equirectangularTile_3_3=1
equirectangularTileBitrate_3_3=1
equirectangularTile_4_0=1
equirectangularTileBitrate_4_0=1
equirectangularTile_4_1=1
equirectangularTileBitrate_4_1=1
equirectangularTile_4_2=1
equirectangularTileBitrate_4_2=1
equirectangularTile_4_3=1
equirectangularTileBitrate_4_3=1
equirectangularTile_5_0=1
equirectangularTileBitrate_5_0=1
equirectangularTile_5_1=1
equirectangularTileBitrate_5_1=1
equirectangularTile_5_2=1
equirectangularTileBitrate_5_2=1
equirectangularTile_5_3=1
equirectangularTileBitrate_5_3=1
equirectangularTile_6_0=1
equirectangularTileBitrate_6_0=1
equirectangularTile_6_1=1
equirectangularTileBitrate_6_1=1
equirectangularTile_6_2=1
equirectangularTileBitrate_6_2=1
equirectangularTile_6_3=1
equirectangularTileBitrate_6_3=1
equirectangularTile_7_0=1
equirectangularTileBitrate_7_0=1
equirectangularTile_7_1=1
equirectangularTileBitrate_7_1=1
equirectangularTile_7_2=1
equirectangularTileBitrate_7_2=1
equirectangularTile_7_3=1
equirectangularTileBitrate_7_3=1
;bitrate is used only if useTile=false. A ratio r means a bitrate of rvideoOutputBitRate
bitrate=1`

The bit rate of the resulting video is 3903kb/s.
https://user-images.githubusercontent.com/64078936/119605246-03187780-be23-11eb-9f36-2a9e379a303e.mp4

It is easy to get that 3945 is greater than 3903, so why is the bit rate of the video with some high-quality areas and some low-quality areas higher than that of the original input video?

Could you help me solve my doubt？

Regards,
Cassie