Stalling playback on multi-period MPD

[camelon]

Environment

• The MPD passes the DASH-IF Conformance Tool on https://conformance.dashif.org/
• [] The stream has correct Access-Control-Allow-Origin headers (CORS)
• There are no network errors such as 404s in the browser console when trying to play the stream
• The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ
• The issue occurs in the latest reference client on http://reference.dashif.org/dash.js/ and not just on my page

• Link to playable MPD file: https://raw.githubusercontent.com/camelon/camelon/main/manifest_cml.mpd
• Dash.js version: 4.4.1
• Browser name/version: Chrome 105.0.5195.102
• OS name/version: macOS Monterey

dashjs config:

streaming: {
  buffer: {
    fastSwitchEnabled: false,
    stableBufferTime: 20,
  },
  gaps: {
    enableSeekFix: true,
  }
}

Steps to reproduce

1. Play the MPD

Observed behavior

Playback is stalled at the end of 4th period (id: '1/1'). Previous period (id: '0') contains text tracks. When tracking the problem, I found that while playing the period '0', GapController._shouldCheckForGaps() returns false because _onBufferReplacementStarted on text track. Thus, it dries out the buffer by preventing a small gap jump from period '1/1' to '1/2'.

Repro rate: 100% in my app, 20% on a reference DASH-IF JS player.

Console output

Full log
My print-debug logs of GapController can be grepped by CML: string.

[dsilhavy]

@camelon Can you please check if #4051 would solve this issue for you.

[camelon]

@dsilhavy It works, no stalling occurred. Thank you!