Replace Worker with Runner

[joschahenningsen]

Motivation and Context

The current worker implementation is hard to maintain, we therefore want to replace it with the new runner. The goal is to have a clean code base that replaces everything the worker does.

todos:

• All API endpoints the current worker offers should be available in the runner
  • [x] Request Stream
  • [x] Request Stream End
  • [ ] Generate live preview
  • [ ] Generate Section images
  • [ ] Delete Section images (low prio)
  • [ ] Combine Thumbnails
• All API endpoints TUM-Live currently offers for the runner
  • [x] Register
  • [x] Heartbeat (nice to have)
  • [ ] request selfstream
  • [ ] notify vodUpload finished
  • [ ] Notify Silence results
  • [x] Notify Stream Started
  • [ ] Notify Thumbnails finished
  • [ ] Get stream info for upload
  • [ ] notify Transcoding Failure

Functionality wise, the runner should:

• When request stream is called:
  • grab the url with ffmpeg and create a hls stream on disk and notify tum-live that the stream is available
  • After the stream is done, convert the files, append them together and upload them to the vod service.
  • create a thumbnail and the thumnails for the seekbar
  • detect silences in the video and send them to tum-live (not high prio for now)
• when a vod is uploaded, everything that happens after a livestream should also happen to the uploaded file
• when a selfstreamer starts streaming
  • ask tum-live for the details of the token and continue just like with a normal stream