Display of TX3G in RTMP

[jeroen]

Embedded MP4 captions over RTMP do currently not work in the player. They are likely sent as messages instead of inline cues. See the forum thread for more info.

Note this update focuses on VOD streams solely. Ingestion of TX3G data in live streams seems extremely rare/custom and not something we can test.

[jeroen]

Did some debugging. The issue seems to be the trackinfo not getting sent as part of the initial metadata.

Coded a quick workaround for this and gave it to Wowza for testing. The workaround picks up textdata events and displays them, without checking if the textdata belongs to the right track. This works fine for single-track captions, but not for multitrack. For the latter, info is missing to paint the complete picture though.

Waiting on feedback from Wowza before actually committing/documenting in the player.

[jeroen]

This works fine at present. We should add a test case for it to the plugin, so we can confirm its continued working.

[jeroen]

Not needed for the beta, since we'll hold on CC support there.

Note this ticket is not so much for implementation, as well as for adding tests/docs.

[jeroen]

Note Wowza implemented some fixes on their end to support single-track TX3G. They deliberately ignore multitrack TX3G, supporting solely closed captions and not video subtitles.

Closing out this ticket, since there's nothing to do on our end for this.