VP9 Encoded DASH files (help understanding Non Chunked & Non muxed)

[Brian Hayes]

Keep in mind I am new to VP9 encoding.

I am interested in doing VP9 encoded DASH streaming however the after looking through documentation with FFMPEG and Webm Wikis. It seems there is only support for Non Chunked and Non Muxed webm files to use in a DASH player like dash.js.

Is there a reason VP9 encoded files aren't able to be chunked into smaller webm files(or some other intermediate format like .ts/.m4s) to be combined in the receiver's buffer like is done with H264 encoded DASH .m4s files or HLS .ts files?

I assume there is a philosophical difference or is it just because that is the only current support? Is there an advantage to not wanting to chunk video files?

Any feedback on the topic would be very helpful.

[Mayank Agarwal]

Hi Brian,

I am also working on DASH player.First i am trying to understand open source libdash library.In mpd file we have H .264 encoded small chunks with extension .m4s.Once we combine the individual chunks with the corresponding .mp4 segment then we can be able to play the segment with chunk corresponding to the bitrate quality.Is my understanding correct or is different algorithm of playing mpd.

Regards

Mayank

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[Brian D. Hayes]

Your understanding of how DASH playback works with the H264 encoded files matches mine. I am still trying to figure out what monitors the bandwidth or where the rate adaption algorithms reside. I am also trying to figure out what specifically the media source extensions (MSE) of the browser do specifically for DASH.

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Brian Hayes
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