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DataAndConfigurationMessages / 104VideoFrameIndex

Video frame index

Channel Number 104
Total Length 9 bytes
Channel Data1 Data2 Data3 Data4 Data5 Data6 Data7 Checksum

If (Data6 & 0x80) = 0,

Video frame index = Data4 * 2^24 + Data3 * 2^16 + Data2 * 2^8 + Data1

If (Data6 & 0x80) = 1,

Video PTS = Data1 * 2^24 + Data2 * 2^16 + Data3 * 2^8 + Data4

CPU load = Data5 * 0.5 (from 0 to 127.5%)

If (Data6 & 0x40) = 0,

Free A/V buffers = Data6 and 0x0F (from 0 to 15)

If (Data6 & 0x40) = 1,

Percentage of free IP buffers = ((Data6 & 0x38) >> 3) x 14.285
Percentage of free SD buffers = (Data6 & 0x07) x 14.285

If (Data6 & 0x40) = 0,

Free MPG CF write blocks = Data7

If (Data6 & 0x40) = 1,

Camera index = ((Data7 & 0xE0) >> 5) (0 to 7)
File index = Data7 & 0x1F (0 to 31)

Camera Index and File Index:
When there are multiple cameras present in a system such as RT Network Video Recorder (NVR), the data will be mapped to video file using the Camera index field. And for a camera, when there are multiple files present due to automatic splitting at 2GB file limit, the file index will be stored to File index field.

Page last modified on June 23, 2017, at 01:12 PM