Channel Setting



Video Source



In order to use the MVS to view live video streams from other MPEG-4/M-Jpeg video streams, the sources must first be defined here.
To define a new source, select a video source from 1-4 and input the following parameters.
IP Address - IP Address for the video source
Port - HTTP Port for the IP address
Video Type - Select MPEG4 for 1400 or MJPEG for other video servers that use MJPEG as video type.
Rotation - Select the rotation in which the video is displayed. Values run from 0 to 4, which is 0, 90, 180, 360 degrees clockwise rotation respectively.

Video Channel - Select the channel number for the IP Address
Username - Input the username for the Video source;as for default PiXORD devices come with username as "root"
Password - Input the password which belongs to the username;as for default PiXORD devices come with username as "root",the password is "pass"
MAC - Input the MAC address for the device's channel to be displayed.

Apply - Saves the changes made


Image Adjust

Basic


Capture Resolution V There are 6 different resolutions to choose from:
D1 V 720x480 NTSC/720x576 PAL
VGA V 640x480
SIF V 352x240 NTSC/352x288 PAL
QSIF V 176x112 NTSC/176x144 PAL

Video Encoder Bitrate V There are 12 different bitrates to choose from between 64Kbps and 4Mbps, with examples of the network connections required to achieve those speeds.
For good quality D1 at full frame rate (30 fps NTSC/25 fps PAL) the bitrate should be set to 1.5Mbps or higher.
For good quality VGA at full frame rate, the bitrate should be set to 1Mbps or higher.
For good quality SIF/QVGA at full frame rate, the bitrate should be set to 512Kbps or higher.
Video Frame Rate V The frame rate can be set between 1-30fps.
TV Standard - Select the TV mode according to your needs, options are NTSC, PAL and SECAM
Apply - Saves the changes made

Advanced


MPEG Sequence mode -There are 3 different modes available:
I-frames only
I-frames and P-frames
I-frames, or Intra-coded frames, are compressed images, somewhat similar to JPEG images.
P-frames, or predictive frames, are predicted based on prior P or I-frames plus some additional data. They have a much higher compression ratio than I-frames.
B-frames, or bi-directionally predicted frames, are predicted based on the appearance and location of past and future frames. Their compression ratio is the highest of all.
I-frame only mode has very little compression resulting in large file sizes.
I-frame and P-frame mode offers relatively good compression with medium file sizes. Although this requires more work on the host PC to decode the video.

Video Encoder Format - Currently, only MPEG-4 Simple Profile is supported.

Interlace mode - There are two modes available: Interlaced or Progressive.
Interlaced mode is a storage mode. An interlaced video stream contains fields rather than frames, with each field containing half of the lines of a frame.
A progressive video stream consists of only full frames.
Interlaced video streams can bring a lower bitrate but may cause lower quality.

Video Encoder Peak Bitrate - This is used to set a maximum bitrate that can be achieved. This is useful for setting bitrates between the values that are available from the Video Encoder bitrate list.

Encoder Bitrate Control Mode - Select between a Constant Bit Rate (CBR) and various qualities of Variable Bit Rate (VBR).
CBR frames are all the same size regardless of the amount of difference from one frame to the next.
VBR frames vary according to the amount of difference between frames.
When there is very little activity VBR can achieve better compression, resulting in smaller file sizes or better throughput, at the same or better quality.
When there is a lot of activity CBR file sizes are smaller and the throughput is better, although the quality may not be. The MVS can be set to CBR, or anywhere between a high quality of 4 or low quality of 30 VBR.

GOP Size - GOP stands for Group Of Pictures. It defines the number of frames from one I-frame to the next. Since an I-frame uses very little compression, while P/B frames use much higher compression, a larger GOP size, results in smaller file sizes. For more information about I/P/B-frames, see below.
For MPEG-4 there is no maximum GOP size defined. It can be as low as 1 V just an I-frame - or into the thousands. However, as the GOP size increases, the compression increases, and therefore the more likelihood of errors. A higher GOP size also results in higher buffering times.
For DVDs the GOP size is 15. The default on the MVS is set to 60, which offers fair compression with a low likelihood of errors.

Audio Raw Format: Select the wether to turn on the audio broadcasting or turn it off.

Apply - Saves the changes made

Image Adjust

Contrast, brightness, hue and Saturation can be adjusted.
Values run from -100 through 100.
Load Default - sets the image adjustments back to factory default.


On Screen Display

The on-screen display is used to identify a video source from the video stream.
On Screen Display-Click enabled to use the on-screen display.
OSD Text- Enter a description of the video source.
OSD Coordinate X/Y - Select the X/Y coordinates. The default is the top left-hand side.
Display Font Grey Level - Define the shade of gray used for the font. The level goes from 0 to 255.
Apply - Saves the changes made