eLine Technology ETV_v7 - Manual (Page 55)

ETV System Server Software - User’s Guide Page 55
MPEG4 CODEC Settings
To switch the recording CODEC to MPEG4, select the MPEG4 option from the CODEC drop-down menu.
Key-frame Rates
Sets the number of key-frames recorded per second. The higher the value, the greater the data
space needed for recording, but the higher the quality of the video.
Motion Search
Scope
Changes the size of the regions used to detect motion.
Quantization
Method
Selects the type of compression. H263 offers higher compression than MPEG4 but requires more
CPU usage.
ME Accuracy
Motion Estimation Accuracy includes two options: Full Pixel and Half Pixel. Full Pixel checks for
motion comparing differences of full pixels. Half Pixel will check for motion using an interpolation
method that detects finer movements.
Note: Half Pixel is a CPU intensive setting.
ME Algorithm
The Motion Estimation Algorithm changes the shape of the area used for motion detection and
includes two options: Full Search and Fast Search. Fast Search will save CPU time but Full Search is
more accurate.
ME Vectors
Sets the number of vectors tested for motion from 1 to 4. The greater the number, the more CPU
processing is required.
Hardware CODEC Settings
Depending on the DVR model, it may use Hardware CODEC recording, which has slightly different
customization options. For some types of cards the CODEC used can be changed in the DVR Settings |
Hardware Tab via the Hardware CODEC Dropdown box.
Variable Bit Rate
The default setting of Variable Bit Rate allows the encoder to change its recording bit rate
automatically as required. This option offers the best combination of file size and visual quality.
Constant Bit Rate
Changes a variable bit rate into a constant bit rate. A setting of Constant Bit Rate with a very high
bit rate selected will provide the maximum video quality settings, although this is at the expense of
storage space.
Restrict Maximum
Bit Rate
Sets a hard limit on the maximum quality that can be recorded. Use the slide bar to select the
desired maximum bit rate.