Meeting Minutes

dash.js 2024-04-16

Time: 17:00 - 18:00 CEST

Participants: Stephan Schreiner, Mike Dolan, Casey Occhialini, Thomas Stockhammer, Daniel Silhavy

General

  • @Daniel to prepare dash.js roadmap planing for one of the next IOP calls

  • Potential contribution from Pluto for XLink@onRequest

    • @Daniel contacted Dan and Kevin again, waiting for feedback

Version 4.7.5

Version 5.0.0

General

Latest additions (see project board for all changes)

Currently Ongoing

Discussion Items

  • Annex I - Flexible Insertion of URL Parameters

    • Definitely interest to have at least basic support for this

    • @Will: To create an issue for this

  • Running dash.js on Set-Top boxes and SmartTVs.
    • Specific settings

  • Custom changes

  • Testing

  • Can we share some kind of best practices / recommendations?

  • Also thinking about dedicated dash.js “profiles”. Enable a specific mode and the settings are adjusted for “best performance” on a certain platform or for a certain feature.

    • Low Latency

    • SmartTV playback

  • High/Medium/Low performance mode –> Different profiles

  • @Daniel: To check with Casey what kind of settings Paramount uses

  • Discussion item for face to face

  • Subtitle Issues

  • Discuss adding a flag to disable the capabilities check. In this case it would be like try and error.

    • If the content is not conformant it might still play (e.g. if the codec string is wrong)

Other items

Common Media Library

  • Mapping between Essential Properties to Media Capabilities API

  • CEA-608 support coming up as a PR to dash.js

    • Two versions of hls.js and dash.js library are merged

    • CTA might have test content to verify implementation. @Casey to talk to @Mike

    • MPEG-TS into VLC as a reference

  • Couple smaller projects

    • Consolidate functionality around content steering

MWS

Livesim2

  • MPD patching was added

  • CMCD support: TU Berlin student project

 

2024-02-27

  • Time: 17:00 - 18:00 CET

Participants

Will Law, Ali Begen, Caleb Hallier, Casey Occhialini, Matt Stephenson, Mike Dolan, Stephan Schreiner, Torbjörn Einarsson, Alex Giladi, Thomas Stockhammer, Daniel Silhavy

General

  • DASH + Fairplay: @Daniel to check with Thasso if Castlabs has any content
    • Talked to Thasso at MHV they can provide content
  • @Daniel to prepare dash.js roadmap planing for one of the next IOP calls
  • Potential contribution from Pluto for Xlink@onRequest
    • @Daniel contacted Dan and Kevin again, waiting for feedback

Version 4.7.4

  • Released on 20 Feb
  • Milestone: https://github.com/Dash-Industry-Forum/dash.js/milestone/61
  • Release notes: https://github.com/Dash-Industry-Forum/dash.js/releases/tag/v4.7.4

Version 5.0.0

  • Project Board:https://github.com/orgs/Dash-Industry-Forum/projects/8/views/2
  • Added Github action to deploy v5.0.0 branch to https://reference.dashif.org/dash.js/v5/samples/dash-if-reference-player/index.html

General

  • Merged changes from 4.7.4 into 5.0.0 branch
  • Created two new v4 branches for potential minor additions and bugfixes to v4
    • V4_Development: https://github.com/Dash-Industry-Forum/dash.js/tree/v4_development
    • V4_Main: https://github.com/Dash-Industry-Forum/dash.js/tree/v4_main
  • Going to merge v5.0.0 branch into development now
  • New documentation for dash.js via Github pages: https://dashif.org/dash.js/
    • Dedicated branch to update markdown files: https://github.com/Dash-Industry-Forum/dash.js/tree/gh-pages
    • Question: What is the best way to host the markdown files:
      • As part of the development branch in a dedicated folder
        • Advantage would be to do a PR of a new feature together with the corresponding documentation
      • Dedicated gh-pages branch as of today

Latest additions (see project board for all changes)

  • Refactor CMSD implementation to use the Common Media Library’s CMSD parser
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4351
  • Enhanced EssentialProperty handling
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4385
    • Allow registering async functions in the custom capabilities filter: https://reference.dashif.org/dash.js/latest/samples/advanced/custom-capabilities-filters.html
    • CTA-WAVE has a mapping of EssentialProperty/Manifest information to MediaCapabilitiesAPI calls
    • Check CTA Playback Spec for detailed instructions. DASH profile for CMAF content
    • @Daniel: Check robustness of MediaCapabilitiesAPI* Parse ID3 payloads for inband events
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4391
  • Improve the AbandonRequestsRule.js by using traces from progress event
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4369
  • Refactor ABR rules and allow configuration of parameters via
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4373
  • https://github.com/Dash-Industry-Forum/dash.js/pull/4378
  • https://github.com/Dash-Industry-Forum/dash.js/pull/4379
  • Support for @ref and @refid in ContentProtection elements
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4380
  • Fix transition from unencrypted to encrypted periods
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4383
    • @Daniel: Create issue for that: Discussed with Thasso during MHV. To optimize this, we should synthesize an encrypted init segment and append that prior to the unencrypted init segment.

Currently Ongoing

  • New Reference UI
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4234
  • Refactor BOLA rule and check for bugs
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4301
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4377
  • Throughput calculation for low latency streams
    • https://github.com/Dash-Industry-Forum/dash.js/issues/3538
    • @Zafer, Ali, Daniel: Check this together
    • @Will: Side load previous segment to validate throughput
    • Assign high priority as people are using dash.js in production for low latency streaming
  • Initial tests of current ABR behavior against ABR testbed
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4008

Other items

Common Media Library

  • @Casey also working CEA-608 support for the CommonMediaLibrary
    • Port of existing code
  • Montevideo summer camp
    • https://github.com/orgs/streaming-video-technology-alliance/projects/12

MWS

  • Planning for dash.js face to face in Berlin co-located with MWS and DASH-IF face to face
    • https://www.fokus.fraunhofer.de/go/mws/
    • dash.js: June 10
    • MWS: June 11 and 12
    • DASH-IF: June 13 and 14

Livesim2

  • Support for ECCP
    • https://github.com/Dash-Industry-Forum/livesim2/pull/150
    • @Daniel: Add testvector to DASH-IF reference list

2024-01-16

  • Time: 17:00 - 18:00 CET

  • Participants: Ali, Casey, Will, Stephan, Tobbe, Bertrand, Daniel

General

  • Casey talking to Dan if they can provide DASH + Fairplay content
    • Not sure if any content available at this point
  • Daniel to check with Thasso if Castlabs has any content
  • Daniel to prepare dash.js roadmap planing for one of the next IOP calls
  • Potential contribution from Pluto for XLink onRequest
    • Daniel contacted Dan and Kevin again, waiting for feedback

Version 4.7.4

  • Planned release date is the 30th January
  • Milestone: https://github.com/Dash-Industry-Forum/dash.js/milestone/61

Closed

  • Add settings for IMSC rollUp and displayForcedOnly parameters. Previously those parameters were hardcoded
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4336
    • rollUp: new lines of text appear at the bottom of the screen and push the previous lines of text upward, creating a rolling effect.
    • displayForcedOnly: If and only if the value of displayForcedOnlyMode is “true”, a content element with a itts: forcedDisplay computed value of “false” SHALL NOT produce any visible rendering
  • Add API endpoint to trigger manifest refresh
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4330
  • Include HTTP request range in data that is passed to modifyRequest callback
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4350
  • Fix errors in Typescript definitions
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4348
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4349
  • Fix invalid warning in StreamProcessor
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4355
  • Remove Chrome workaround in CI/CD as there is a fix for the CircleCI browser tools plugin now
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4335
  • Remove unused dependencies from the package.json
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4356

In Progress

  • Add support for downloadable font functionality as defined in DVB DASH
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4338
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4337
  • Fix flickering/blinking of IMSC subtitles
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4359
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4358
  • Add subtitle event handling for manual rendering of subtitles
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4360
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4317

Open

  • Update getting started guide and contribution guidelines
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4347
  • Fix HbbTV testcases
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4328
  • Rapid seeking causes playback to stall
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4318

Version 5.0.0

  • Project Board:https://github.com/orgs/Dash-Industry-Forum/projects/8/views/2
  • Added Github action to deploy v5.0.0 branch to https://reference.dashif.org/dash.js/v5/samples/dash-if-reference-player/index.html

General

  • After release of version 4.7.4 merge changes from v5.0.0 branch to development and completely focus on this new version

Latest additions (see project board for all changes)

  • Use CommonMediaRequest and CommonMediaResponse classes from the SVTA Common Media Library.
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4299
  • Allows us to use the RequestInterceptor and ResponseInterceptor methods

Currently Ongoing

  • Refactor CMSD implementation to use the Common Media Library’s CMSD parser
    • https://github.com/Dash-Industry-Forum/dash.js/pull/4351
  • New Reference UI
    • https://github.com/Dash-Industry-Forum/dash.js/issues/4234
  • Merge latest changes from development into v5 branch
    • Requires a lot of manual work as we have lots of merge conflicts

Others

  • Stephan might be coming up with additional changes regarding EssentialProperty

Other items

Common Media Library

  • SVTA issuing open call for suggesting work items and then prioritize the items afterwards
    • Open call still running, couple of items identified
      • Common Media Library accepted for Montevideo summer camp
      • Common ContentSteering model
  • Ultimate goal: Get this integrated into open-source players e.g. dash.js and hls.js
    • Casey also working CEA-608 support for the CommonMediaLibrary
  • Port of existing code
    • ID3 utilities in the CommonMediaLibrary, potential integration in dash.js. Would add additional functionality to dash.js.
    • Parse the payload of the emsg events
    • ID3 events can be detected via the schemeIdUri in the InbandEventStream
    • Casey. To issue a PR soon.

MHV and SVTA Segments:2024

  • dash.js presentation at Segments 2024
  • Who is attending
    • Will (MHV), Ali (both), Casey (not sure), Guillaume, Christoph

Livesim2

  • Issue with the UTC timing element
    • https://github.com/Dash-Industry-Forum/livesim2/issues/147
    • Tobbe, Daniel: Check specification and continue discussion in Github issue
  • Support for Clearkey
    • https://github.com/Dash-Industry-Forum/livesim2/issues/122