Getting HLS Chunk Information about videojs-contrib-hls HOT 5 CLOSED

Currently, selectPlaylist() is called every time a chunk finishes downloading. The size of the chunk is not exposed but it is possible to determine the amount of time it took to download it and the estimated bitrate of the network connection based on the download time. What are you thinking of doing with the chunk size and timing info?

from videojs-contrib-hls.

@dmlap Thanks.

I require the start and end of the download time of each chunk to calculate metrics based on the video playback.

How is it that I could determine the start time of the download? Also, is it possible to listen for the start and end of the download, or would I have to fork the project and add my own code into the selectPlaylist() function?

from videojs-contrib-hls.

The total download time is exposed as player.hls.segmentXhrTime after each chunk is downloaded. I'll update the README so that's clearer. If you need an absolute start time for the download, you should be able to subtract that value from Date.now() to get it.

selectPlaylist() is a public part of the API so you don't need to fork the repo to modify it. I would save a reference to the default implementation and override it with a function that calculates your metrics and then delegates back to the original. Patching over selectPlaylist() does seem a little weird for what you're trying to achieve and we may end up adding a first-class event for segment downloads if this turns out to be common. The override solution would still work if we end up going that direction, though.

from videojs-contrib-hls.

Thank you for the information, that should be what I need.

I'm assuming the loadedmetadata event has information associated with it such as the target duration of the chunks?

from videojs-contrib-hls.

Glad to hear that worked!

The loadedmetadata event itself doesn't carry much information but you can look on the HLS tech when it fires to see how the playlist was parsed. The media() method on the playlists object always contains the most up-to-date info on the active playlist, including the target and segment durations.

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