rdm-jpg
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 |
update flag
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
coding mode
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 |
x-axis mv / y-axis mv
bytes : ((width>>3))*((height>>3))
mv ranges from -128~127
jpeg compression quality
bytes : 1
quality ranges from 0~100
pixel data
difference YUV pixel value between two frames
bytes : width*heigh*3
value ranges from -255/2~255/2
decode
