About the test video: This concert event was streamed live from the National Mall by FCI on June 27th, 2012. The event was streamed at four bit rates, 4000 kbps (720p, HD), 1000 kbps (640x480, SD), 700 kbps (512x288, Broadband), and 250 kbps (480x270) in order to provide the best possible experience for the widest possible audience.
If video does not load/play, you may have a firewall issue. Please conduct a firewall port test.
Quality Monitor System Description
The quality monitoring system consists of two components. The overlay on the top of the video lists/charts the current quality metrics. Additionally, messages are presented in the middle of the screen related to players decision to switch between streams (from high quality, to medium quality, to lower quality), based on Internet connectivity and computer performance.
Please note the HD stream will not play in the window above, to view the HD stream you need to view the stream full-screen, and your monitor must have a resolution of at least 720 x 1280 pixels.
The bandwidth of the current connection, in kilobits per second (green).
The number of frames dropped per second (red).
The width of the video screen (blue).
The currently playing quality level including target width and bandwidth (white).
In addition to these four metrics, the plugin displays two quality related messages in the middle of the screen, (1) the moment an actual quality transition occurs (in green text) and (2) the moment a quality level gets blacklisted, as a result of too many framedrops (in red text).
How the Player Selects and Transitions Between Streams:
The player recognizes the various levels of your video and automatically selects the highest quality one that:
- Fits the bandwidth of the server » client connection.
- Fits the width of the player's display (not more than 20% larger).
- Results in less than 25% *frames dropped* at any point in time.
As a viewer continues to watch the video, the player re-examines its decision (and might switch) in response to certain events:
- On a bandwidth increase or decrease, re-calculated at an interval of 2 seconds.
- On a resize of the player. For example, when a viewer goes fullscreen.
- On a framedrop of more than about 7 or 8 fps.
Framedrop is continuously monitored. Spikes are ruled out by taking 5-second averages. Once a quality level results in too large a framedrop, it will be blacklisted (made unavailable) for 30 seconds. After 30 seconds, it will be made available again, since the framedrop might be a result of a very decoding-heavy section in the video or external forces (e.g. the user opening Microsoft Office).
- - - - - - - - - - - - - - -
Firewall Port Test:
If the results of this test show "success" on any port, you should be able to view this webcast video. [Success on any port does not guarantee the stream will play. If all the tests show failure, there is definitely a firewall blocking access to the video/stream.]
IP Addresses Serving This Live Event:
The below IP addresses are being used to serve this live event. These IP addresses should NOT be blocked (RTMP on ports 1935 and 80, RTMPT port 80).