Installation guide

Crestron CEN-NVS100 Network Video Streamer
Before configuring video settings, be aware of the following:
• For the best real-time video images, the network bandwidth should be large
enough to allow a transmission rate of greater than 20 image frames per
second (fps).
⇒ If the broadband network is above 1 Mbps, set Constant Bit Rate
to 1000 Kbps or 1200 Kbps or set Fixed Quality to Excellent. Set
the Maximum Frame Rate to 30 fps.
⇒ If the network bandwidth is above 512 Kbps, set the Constant Bit
Rate according to the network bandwidth and set the Maximum
Frame Rate to 30 fps. If the images vary dramatically in your
environment, it may be preferable to slow the maximum frame rate
down to 20 fps in order to lower the rate of data transmission and
allow for better video quality.
⇒ If the network bandwidth is below 512 Kbps, set the Constant Bit
Rate according to the network bandwidth and fine-tune the
Maximum Refresh Rate to obtain the best performance. In a slow
network, a larger frame rate results in blurred images. In addition,
video quality varies depending on the number of users viewing on
the network. Performance may also suffer due to poor connectivity
because of the network’s burst constraint.
• For the best video quality but less real-time performance, set Fixed Quality
to Detailed or Excellent and adjust the Maximum Frame Rate to match the
network bandwidth. If the network is slow and “broken” pictures result,
select TCP or HTTP as the MPEG-4 protocol option on the “Client
Settings” page as the more appropriate mode of transmission. The images
may suffer a time delay due to a slower connection. In addition, the delay
increases with an added number of users.
• To compromise between real-time and video quality, set Fixed Quality to
Good or better. You can also set Constant Bit Rate according to the
network bandwidth and adjust the Maximum Frame Rate. To adjust the
Maximum Frame Rate, start with 30 fps for best results and adjust the
frame rate downward but not below 15 fps. If the image quality does not
improve, select a lower Constant Bit Rate setting.
Progressive Mode: Select the checkbox to convert interlaced pictures to progressive
pictures.
NOTE: Progressive mode must be enabled when using the largest frame size with
Firefox.
Mode: From the drop-down list, select MPEG-4 or JPEG:
• MPEG-4 allows video and audio transmission but requires a Web browser
for playback.
NOTE: Most cell phones support media streaming with MPEG-4 video.
• JPEG (motion JPEG) is compatible with Crestron TPMC touchpanels that
support the MJPEG Viewer application. Audio is not supported.
Operations & Installation Guide – DOC. 6873A Network Video Streamer: CEN-NVS100 • 43