View source for Extension:TimedMediaHandler/2018-2019 work

Current rough plans for the 2018-2019 season's work on TimedMediaHandler:

== Immediate (Q1) ==

'''Feature track'''
* subtitle API with lax runtime conversion from SRT to VTT {{done}}
** finish old subtitle API patch updated with new conversion engine
* deploy, or prepare, deployment of video.js {{done}}
* remove old kaltura player bits from TMH {{not done}}

'''Tech track'''
* [[Extension:TimedMediaHandler/VP9 transition|switch to VP9 transcodes]] (smaller file sizes for many, better quality for most) {{done}}
** merging final patches, then ready to start any time!
* update ogv.js to latest release (minor VP9 fixes) {{done}}
* tweak ogv.js thread management to handle large number of paused players better {{done}}

== Next steps (Q2-Q3) ==

'''Feature track'''
* customize frontend controls for videojs-mode players {{not done}}
** inline start/stop {{done}}
** easy expansion to zooming player into MediaViewer {{done}}
* get video playback working in iOS Wikipedia mobile app {{not done}}
** either tidy up OGVKit or ship the ogv.js player embedded
* clean up reporting tools for transcode errors, queue state (Special:TimedMediaHandler, File: page table) {{not done}}
* experiment with frontend UI for on-wiki audio/video trimming/rotation manipulation tool {{not done}}
* experiment with frontend UI for on-wiki subtitle editing tool {{not done}}

'''Tech track'''
* ogv.js work for MPEG-DASH adaptive streaming {{not done}}
** add MSE interfaces to ogv.js {{not done}}
** get video.js's DASH talking to ogv.js
* ffmpeg research for MPEG-DASH adaptive streaming {{in progress}}
** create webm vp9 file-per-track streams and play them back with video.js
** create webm vp9 chunked streams and play them back with video.js
** create webm vp9 chunked streams through multiple separate ffmpeg invocations and stitch the manifests together (desired for better job queue management)
* research on-wik trimming rotation / manipulation tool {{not done}}
** conversions done with ffmpeg command options

== Medium future (Q4) ==

'''Feature track'''
* experiment with on-wiki trimming / rotation manipulation tool {{not done}}
* experiment or deploy on-wiki subtitle editing tool {{not done}}

'''Tech track'''
* (optional) limit flat files to lower resolution to save space {{not done}}
* deploy MPEG-DASH adaptive streaming to supplement existing flat files {{not done}}

== Farther future ==

'''Feature track'''
* re-evaluate more advanced video manipulation and editing

'''Tech track'''
* evaluate AV1 compression & playback for eventual supplement/replacement of VP9 {{not done}}
* evaluate MP4 H.264, HEVC, AAC ingest {{not done}}
* set up MP4 H.264 output options for compatibility if license issues ever resolved