Matrox Maevex Series – User Guide
19
Encoder Settings
The settings specific to an encoder are:
Encoder information
– The information for the currently selected encoder.
The information provided is the serial number of the unit, its firmware version, its
IP address, and its status. Click
Start encoding
when you want the encoder to start
transmitting.
While the encoder is transmitting, the URL for the stream is also listed. To assign a
stream to a decoder, copy this URL and paste it in the
Stream address
box of the decoder
window.
Click
Stop encoding
when you want the encoder to stop transmitting. You can also click
on the
Reboot
button to restart the unit.
While the encoder is transmitting, the average and current bit rate plus the average and
current frame rate are provided for the current stream.
Capture
– The capture settings provide the information on the video and audio signal
received by your encoder.
Select the frame rate for video capture. Possible choices are to grab every frame, every
other frame, or down to one frame every 30 frames.
Select the audio source to use for audio capture. Select the bit rate used to transmit audio
and the sampling rate used to receive audio.
Encoding
– The encoding settings define how the video and audio signal are compressed and
sent by your encoder.
By enabling
Use a specific video size
, you can scale the video before it’s encoded. Specify
the width and height in pixels of the video. If your video source uses a different size, your
encoder scales the video to the specified size and distortion may occur.
The
Bit rate limit
is the maximum bandwidth in Mb/s (MegaBits per second) used by
your encoder to transmit the streaming signal. The actual bandwidth used by your
encoder varies according to your source and your encoding method.
To determine how the bandwidth allocated to your encoder is used, select which aspect
you want to favor between speed and quality under
Strategy
.
Enter the number of frames making up your
Group of pictures
(GOP) and the number of
frames at which a P frame is inserted. A smaller group of picture and a higher number
of P frames have a higher image quality but require more bandwidth.
If you enable
Use Rate Control
, select the range of
QP
(Quantisation Parameter) used to
compress the various frames in your GOP. The range of QP is from 0 to 51. We
recommend using increasing values from I to B frames.
Preliminary
–
Engineering
samples
