Quality-related metrics

Here you'll find a list of the quality-related metrics you can use.


Name	Description	Unit	Audience Analytics - Standard	Audience Analytics - Aggregate View	Audience Analytics Events	QoS Monitor - All	Viewer Diagnostics
% Rebuffering Plays	Weighted average of the proportion of rebuffering sessions calculated at 1 minute, expressed as a percentage. You can plot this metric with content, ad, and geo dimensions to understand when rebuffering occurs most and the size of audience it affects. Use with other behavioral metrics like play duration per visit and rebuffer abandons to understand the effects of rebuffering on audience behavior.	Percentage	✓	✓	✓	✓
Attempts	Sum of attempts to play back content (title/main stream).	Number	✓	✓	✓	✓
Availability	Average availability across all attempts (excluding user abandons). Calculated as the number of plays divided by plays + startup errors.	Percentage	✓	✓	✓	✓
Average Rebuffer Time per Play	Average time spent on rebuffering per play.	Seconds	✓	✓	✓	✓
Bandwidth	Average overall bandwidth experienced by end users.	kbps/mbps	✓	✓	✓	✓
Bitrate	The weighted average of bitrates played during sessions (kbps). Samples are taken at regular intervals during playback (~500ms).	kbps	✓	✓	✓	✓	✓
Bitrate Downshift	Average number of times users experienced a bit rate downshift per session.	Number	✓	✓	✓	✓
Bitrate Upshifts	Average number of times users experienced a bit rate upshift per session.	Number	✓	✓	✓	✓
Dropped Frames	Average number of dropped frames per play.	Number	✓	✓	✓	✓
Errors	Sum of play attempts that ended before start of playback and mid-play due to errors.	Number	✓			✓
Frames per Second	Average frames per second of the video experienced by end-users for the chosen dimension.	Number	✓	✓	✓	✓
In-Play Errors	The number of errors encountered after the play has started. This does not include startup errors.	Number					✓
Max Bandwidth	The maximum bandwidth with which the client was able to consume the content. This is measured as average over an interval of 5 seconds.	Number					✓
Play Duration (Bitrate Level)	Sum of play duration across all plays at each bitrate. You can plot this metric with the bitrate dimension to note the bitrates used most and leverage the information to decide on the bit rates to retain in the stack.	Hours	✓	✓	✓
Plays (Bitrate Level)	Sum of plays across all plays at each bitrate. You can plot this metric with the bitrate dimension to identify bitrates used most and leverage the information to decide on the bit rates to retain in the stack.	Number	✓		✓
Plays with Errors	Sum of play attempts that ended before start of playback due to errors.	Number	✓	✓	✓
Plays with Rebuffers	Sum of plays with at least one rebuffering event.	Number	✓	✓	✓	✓
Rebuffer Abandons	Sum of plays that were abandoned during a rebuffering event.	Number	✓	✓	✓	✓	✓
Rebuffer Time per Minute	Average amount of time spent rebuffering per minute of playback.	Seconds	✓	✓	✓	✓
Rebuffers per Minute	Sum of rebuffers across all plays divided by sum of plays.	Number	✓	✓	✓
Startup Abandonment Rate	Percentage of plays user-abandoned before the initial buffer fill.	Percentage	✓	✓	✓
Startup Abandons	Sum of plays that were abandoned before the initial buffer filling. This metric can also be defined as abandons that occurred as a result of user-initiated actions and not due to systemic or stream start up failures.	Number	✓	✓	✓
Startup Errors	Sum of plays that did not start due to errors.	Number	✓	✓	✓	✓	✓
Startup Time	Average time between the initial play attempt and the first rendered frame, in seconds.	Seconds	✓	✓	✓	✓	✓
Title Abandons	This is applicable only for on demand video. It indicates the number of titles viewed for less than 95% of the title duration.	Number					✓
Total Play Duration	Sum of play duration across all plays in seconds. This is meant to be used for bucketed dimensions like Max Bitrate (play level).	Seconds	✓	✓	✓
Total Rebuffer Count	Sum of rebuffers across all plays.	Number	✓	✓	✓
Total Rebuffer time	Sum of time spent rebuffering across all plays.	Seconds	✓	✓	✓