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