Glossary

Error rate

Percent of all play requests with errors that prevented playback experience.

Errors are often caused by player or player plugin misconfiguration. Viewing error rate by device or player can provide direction on where to focus on reducing errors. You can review our Brightcove Player Error Reference for more information on player errors.

Video start time

Average time between the play request and the stream start per video view; this time does not include ad pre-roll time.

The number of player plugins that load, initial stream bitrate, and viewer bandwidth can impact start time. Reviewing players, bitrate ladder, and device/video resolution breakdown can provide direction on improving this.

Counting errors

Distinct fatal errors per session, per viewer. If multiple errors occur in a session, they are de-duplicated.

Video resolution

Percent of engagement events issued by categories of video resolution.

Reviewing resolution breakdown by device in combination with video start time, rebuffering time, and stall rate can show ways to optimize playback.

Rebuffering time

Average seconds of buffering per hour of video viewed.

This often increases when the bandwidth is too low to consume the bitrate of the stream that is playing. Looking at bitrate and video resolution by device or country can provide insights into video resolution adjustments that could reduce rebuffering.

Stall Rate

Stalls per hours viewed in the time range.

Stall rates often increase when the bandwidth is too low to consume the bitrate of the stream that is playing. Looking at bitrate and video resolution by device or country can both provide insights into video resolution adjustments that could reduce rebuffering.

Avg bitrate

Average bitrate (kbps) across all video views in the time range.

Upscale time

Average seconds per hour spent in an upscaled state.

Upscaling has a real impact on picture clarity when video resolution is significantly lower than screen resolution. Review screen resolutions by device to understand the potential impact of upscaling better. Consumers using 4K TVs will often have upscaling occur, but the viewing experience can still be high quality.