Videoswitch Vi-R4000 Series - Manual (Page 26)

Vi-R4000 Series
Videoswitch Page 20 Mdr602a.doc
3.4.3 Quality
Medium quality is appropriate for most applications but this can be adjusted to achieve required
playback quality. Setting this higher will use disc space up more quickly.
When you change the quality, make sure you also change the Max Bitrate (Kbps) accordingly.
3.4.4 Frame Rate
The frame rate has the next greatest impact on disc space usage. Refer to the tables in section Error!
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to choose highest record rates whilst achieving sufficient retention of
recordings. Set this for Normal and Event recording. Typically, normal recording would have a lower
frame rate to conserve disc space and achieve the required retention period whereas activity recording
would use the maximum rate to maximise evidence during periods of particular interest.
When you change the quality, make sure you also change the Max Bitrate (Kbps) accordingly. It
should be within the range indicated by Max Bitrate Range Recommended which is displayed on the
screen.
3.4.5 Max Bitrate
This should be set once the Resolution, Quality and Frame Rate have been selected. Set Max Bitrate
within the range indicated by Max Bitrate Range Recommended, somewhere near the higher figure
is recommended.
Note:
If Max Bitrate Mode is set to General you can chose Max Bitrate from a list of options
If Max Bitrate Mode is set to Customer you can enter any value for Max Bitrate.
Recommended max bit-rates are shown in this table:
2CIF 4CIF Frames
per
second Lowest Lower Low Medium Higher Highest Lowest Lower Low Medium Higher Highest
1 147 221 258 295 370 518 295 370 445 518 592 890
2 167 252 295 336 421 590 336 421 506 590 675 1012
4 208 313 366 418 523 733 418 523 626 733 838 1258
6 250 375 438 500 626 877 500 626 751 877 1002 1503
8 291 436 510 582 728 1020 582 728 875 1020 1166 1750
10 331 497 581 663 831 1163 663 831 997 1163 1330 1996
12 372 558 653 746 933 1307 746 933 1120 1307 1493 2241
15 433 651 761 868 1087 1522 868 1087 1305 1522 1740 2610
16 455 682 796 910 1138 1593 910 1138 1366 1593 1821 2732
18 495 743 868 991 1241 1737 991 1241 1488 1737 1985 2978
20 536 803 940 1073 1343 1880 1073 1343 1612 1880 2148 3225
22 577 866 1011 1155 1446 2023 1155 1446 1735 2023 2312 3470
25 640 960 1120 1280 1600 2240 1280 1600 1920 2240 2560 3840
3.4.6 Copy settings to all other Cameras
Once you have set everything for one camera, you can copy its settings to all other cameras: