Teradek Cube Reference Guide - Manual (Page 19)

Version 2 Dec „11 © Teradek, LLC 2011. All rights reserved.
Page | 19
1. Options (in order of display):
1.1. Title Text: Enter your desired title text here. Check „Show Title‟ to display the title text on your
video stream. If the title text is enabled, you can also display Cube‟s system time by checking
„Show Time Code.‟ The title text is also used as your channel name, and is displayed wherever
you see a Cube stream advertisement. The default name is „Channel 1.‟
1.2. Video Bitrate: Allows you to select different bitrates or manually enter your stream‟s target bitrate
(in bits per second). Lower bitrates require less bandwidth and may allow for a more stable
stream. Higher bitrates offer better video quality, but require more network bandwidth.
1.3. Audio Bitrate: Similar to above video bitrate setting. Use this to adjust the audio bitrate, if
applicable.
1.4. Output Resolution: Adjust Cube‟s streaming resolution. If your network conditions have
bandwidth restrictions or if you are streaming to mobile devices or the Internet, you can scale
Cube‟s video to a smaller size to maintain video quality. You can also adjust the video stream‟s
frame rate here.
1.5. Key Frame Interval: Adjusts the number of frames between full picture refreshes. Increasing this
value allows for better video quality at a given bitrate as the full image is not transmitted as often.
Decreasing the value may lower the overall image quality, but will allow for quicker recovery of
the stream if data is lost during transmission.
1.6. Compression Profile: High profile encoding typically gives the best image quality at a given bit
rate and is ideal for most applications. Main and baseline profiles utilize slightly different
features, and may be required by certain decoder clients (e.g. mobile devices, set top boxes,
etc.).
1.7. Latency Options – Caching value: This value can be left at its default (300 ms) in most cases. By
decreasing the value, you can reduce overall latency, but video quality and stability may suffer if
the value is set too low. By increasing the value, you can increase the stream stability. Increase
this value if your video stream stability is affected by a poor or challenging network environment.
Recommended values are 300ms when Intra-refresh (see below) is disabled, 75 ms when
enabled.
1.8. Intra Refresh Mode: This mode allows for the lowest possible latency when streaming between
Cube encoders and decoders. It also allows the above caching value to be set lower without
affecting the stream stability. This mode is not currently compatible with available software
decoders (e.g. VLC, Quicktime, etc.).
1.9. Rate Control Settings: For most applications, Rate Control Settings can be left at their default
values (Mode – Auto, Static Scene Detection – Disabled, and Complexity Detection – Enabled).
Adjusting the rate control settings manually gives more control over the streaming bandwidth,