Playback does not end with truncated Akamai streams when subtitles are displayed

[defagos]

When playing a truncated Akamai stream with subtitles enabled (truncation via start and end parameters), the subtitles track is correctly aligned at the beginning, but its length is bigger than the stream duration. As a result, the player never reaches the end state.

Issue type

Incorrect behavior

Description of the problem

Subtitles track for truncated streams is an Akamai beta feature. We should report the bug and implement a workaround in the meantime.

Environment information

• Library version: Any
• iOS version: Any
• Device: Any

Reproducibility

Always reproducible

Steps to reproduce

1. Play an Akamai stream having subtitles, truncated with start and end parameters, for example https://rtsvodww-vh.akamaihd.net/i/journ-19h30/2019/journ-19h30_20190603_full_ca7d9d68-58aa-4acd-b2e5-a6af7470bc8d-,301k,701k,1201k,2001k,3501k,6001k,.mp4.csmil/master.m3u8?caption=journ-19h30/2019/journ-19h30_20190603_full_500048834.m3u8:fra:Fran%C3%A7ais&start=267.36&end=387.36
2. Enable subtitles.
3. Wait until playback reaches the end. The player never ends playback.

[pyby]

feature/akamai-subtitles-end-fix is our proposition and it's merged to develop.