mpegtsjs-metric

What it is

• An approach to get QoS-related metrics from mpegts.js/flv.js player.
• Compatible with both mpegts.js/flv.js libraries.
• Only applicable to MSEPlayer

Install And Usage

• npm i mpegtsjs-metric

• import EnableQoS from 'mpegtsjs-metric'
  
  // enable mpegts.js/flv.js with qos-related metrics
  EnableQoS()
  
  // get metric from the MSE player
  player.getMetric.then(metric=>{
    // do something
  }).catch(err=>{
    // fail to get metric
  })

Metrics

• The resolved object metric includes the following properties:

property	explanation
buffered	An array that containes multiple objects, each of them has start and end property, representing the startTime and endTime of the current video buffer
duration	The duration of the video source. Infinity when the source is live.
currentTime	The current playback time of the video
mimeTypes	Audio/Video type and Codec. Undetected when there is no video/audio
currentKBps	Current speed of pulling network stream KB/s
mediaInfo	Meta/video/audio Info of the current media
stashUsed	Current stash size used to handle media data KB
stashSize	Total stash size used to handle media data KB
totalVideoFrames	mdn
droppedVideoFrames	mdn
resolution	The resolution of the video, string format eg. 1024x960
prestoredTime	The buffered time ahead of current playback time
presentedFrames	A count of the number of frames submitted for composition
presentationTime	The time at which the user agent submitted the frame for composition
frameRate	FPS

• Most of above are retrieved from mpegts.js and Web APIs, and this npm package provides a unified interface.

Build

• npm run build

Issue

• Compatibility
  • mpegts.js/flv.js
  • requestVideoFrameCallback API