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owncast/build/javascript/node_modules/@videojs/http-streaming/docs/mse.md
dependabot[bot] dab7914eab
Bump @justinribeiro/lite-youtube from 0.9.0 to 0.9.1 in /build/javascript (#273) 
* Commit updated Javascript packages

* Bump preact from 10.5.4 to 10.5.5 in /build/javascript (#265)

* Trying a new github workflow to install javascript packages

* Bump tailwindcss from 1.9.2 to 1.9.4 in /build/javascript (#266)

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss) from 1.9.2 to 1.9.4.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/compare/v1.9.2...v1.9.4)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Commit updated Javascript packages

* Bump preact from 10.5.4 to 10.5.5 in /build/javascript

Bumps [preact](https://github.com/preactjs/preact) from 10.5.4 to 10.5.5.
- [Release notes](https://github.com/preactjs/preact/releases)
- [Commits](https://github.com/preactjs/preact/compare/10.5.4...10.5.5)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: Gabe Kangas <gabek@real-ity.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Owncast <owncast@owncast.online>

* Bump @justinribeiro/lite-youtube in /build/javascript

Bumps [@justinribeiro/lite-youtube](https://github.com/justinribeiro/lite-youtube) from 0.9.0 to 0.9.1.
- [Release notes](https://github.com/justinribeiro/lite-youtube/releases)
- [Commits](https://github.com/justinribeiro/lite-youtube/commits)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: Owncast <owncast@owncast.online>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Gabe Kangas <gabek@real-ity.com>
2020-10-20 15:15:56 -07:00

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Media Source Extensions Notes

A collection of findings experimenting with Media Source Extensions on Chrome 36.

  • Specifying an audio and video codec when creating a source buffer but passing in an initialization segment with only a video track results in a decode error

ISO Base Media File Format (BMFF)

Init Segment

A working initialization segment is outlined below. It may be possible to trim this structure down further.

  • ftyp
  • moov
    • mvhd
    • trak
      • tkhd
      • mdia
        • mdhd
        • hdlr
        • minf
    • mvex

Media Segment

The structure of a minimal media segment that actually encapsulates movie data is outlined below:

  • moof
    • mfhd
    • traf
      • tfhd
      • tfdt
      • trun containing samples
  • mdat

Structure

sample: time {number}, data {array} chunk: samples {array} track: samples {array} segment: moov {box}, mdats {array} | moof {box}, mdats {array}, data {array}

track chunk sample

movie fragment -> track fragment -> [samples]

Sample Data Offsets

Movie-fragment Relative Addressing: all trun data offsets are relative to the containing moof (?).

Without default-base-is-moof, the base data offset for each trun in trafs after the first is the end of the previous traf.

iso5/DASH Style

moof |- traf (default-base-is-moof) | |- trun_0 + 0 | - trun_1 <size of moof> + 100 - traf (default-base-is-moof) - trun_2 <size of moof> + 300 mdat |- samples_for_trun_0 (100 bytes) |- samples_for_trun_1 (200 bytes) - samples_for_trun_2

Single Track Style

moof - traf - trun_0 + 0 mdat `- samples_for_trun_0