Standard metrics

Media Analytics provides a number of metrics that you can use to create reports.

Here, you'll find a list of the standard metrics used with Media Analytics.


Metric	Definition and methodology
Aggregate Play Duration	Aggregate Play Duration is the total amount of time users played content during the time period displayed.
Attempts	The total number of attempts made to play the stream(s).
Audience Size	The total audience represented at a particular point in time; unlike other metrics in QoS Monitor which are aggregate values, this is an instantaneous value.
Average Encoded Bitrate	The weighted average of bitrates played during sessions (kbit/s); The weighted average is calculated as (b1 t1 + b2 t2 + ..)/(t1 + t2 + ..) Where b1 = Bitrate 1, t1 = Playing Time Spent in Bitrate 1 b2 = Bitrate 2, t2 = Playing Time Spent in Bitrate 2 The samples are taken at regular intervals during playback (~500 ms).
Bandwidth	The average bandwidth experienced by users watching the stream(s); The byte rate at which player buffer fills is sampled at regular intervals (~500 ms); The sum average of all such samples are represented as the average bandwidth (bps).
Bitrate	The average bitrate at which stream is being played back (bps); Samples for calculation are taken at regular time intervals during playback (~500 ms).
Buffer Time	The average time spent over initial buffering before the play starts per session (secs).
Connect Time	The average time spent over the initial connection to the server per session (secs).
Downshifts	The average number of times users experienced a bitrate downshift per session.
Dropped Frames	The average number of frames dropped per session during playback.
Errors	The total count of all errors.
First Rebuffers	Null
Frames per Second	The average number of frames rendered per second per session during playback. The frames per second values are sampled at regular intervals during playback (~500 ms).
Views	Views are the number of sessions (plays) where the content was played for a minimum of 5 seconds for the time period displayed.
HD Play Duration	The time over which the stream played in HD quality (>=2.5 Mbps, in hours) HQ Play Duration The time over which the stream played in HQ quality (>=1.5 Mbps and <2.5 Mbps, in hours).
Percentage Rebuffering	The percentage of sessions experiencing rebuffers; calculated as the ratio of the number of sessions rebuffering at least once to the total number of active sessions expressed as a percentage.
Play Duration per Session	The average playtime per session (mins).
Rebuffer Ratio	The ratio of time spent rebuffering to time spent playing the stream.
Rebuffer Time per Session	The average time spent on rebuffering per session (secs).
Rebuffering	The percentage of sessions experiencing rebuffers; calculated as the ratio of a number of sessions rebuffering at least once to the total number of active sessions expressed as a percentage.
Rebuffering Sessions	The number of sessions that had at least one rebuffer.
Rebuffers Per Session	The average number of rebuffers experienced per session.
SD Play Duration	The time over which the stream played in SD quality (<1.5 Mbps, in hours).
Sessions	The number of stream initiation attempts (includes streams with errors).
Sessions Ended	The number of ended sessions.
Sessions Started	The number of successfully initiated streams (that is excluding attempts with startup errors).
Start Up Errors	The number of startup errors.
Start Up Time	The average startup time per session.
Successful Attempts	The overall availability of the stream(s); calculated as a percentage of successfully initiated sessions to total sessions.
Upshifts	The average number of times users experienced a bitrate upshift per session.