Extra JPEG File
Must be a multiple of 16 in width and height.
marker | description |
---|---|
APP3 | update flag |
APP4 | coding mode |
APP5 | x-axis mv |
APP6 | y-axis mv |
APP7 | jpeg compression quality |
bytes : ((width>>3))*((height>>3))>>3
(n)|(n+1)<<1|(n+2)<<2|(n+3)<<3|(n+4)<<4|(n+5)<<5|(n+6)<<6|(n+7)<<7
bytes : ((width>>3))*((height>>3))>>1
(n)|(n+1)<<4
value | coding mode |
---|---|
0 | golden frame |
1 | golden frame + MV |
2 | inter frame |
3 | inter frame + MV |
4 | intra frame |
bytes : ((width>>3))*((height>>3))
mv ranges from -128
~127
bytes : 1
quality ranges from 0
~100
difference YUV pixel value between two frames
bytes : width*heigh*3
value ranges from -255/2
~255/2