Built-in player shows no audio/subtitle tracks for some RD/Torrentio streams

[demiolawunmi]

Stremio Platform

macOS

Describe the bug

On macOS (Apple Silicon), the Stremio web player loads and plays certain streams (commonly Real-Debrid results via Torrentio) but the Audio and Subtitles menus remain disabled/greyed out. Playback uses a single audio track (which I assume is the default), and embedded subtitles are not detected even when the file clearly contains them.

To Reproduce

1. Open Stremio v5 Web on macOS and Stremio Service.

2. Install/enable Torrentio and sign in to Real-Debrid.

3. Pick an item that commonly ships with embedded subs and multiple audio tracks. Example what worked for me to prove this:

Working: Drive to Survive S7E1 [RD+] Torrentio 1080p HDR

Not Working: Windbreaker S1E6 [RD+] Torrentio 1080p (Top Option)

4. Start playback from a Real-Debrid source.

5. Open the player’s Audio/Subtitles menus.

6. Observe the menus are disabled, even though the file contains tracks

Expected behavior

The player should detect and expose available audio tracks and subtitle tracks in the UI on macOS, the same as on Windows as I never had this issue before switching.

Embedded subtitle formats that are supported in the Stremio player should appear as selectable options.

Screenshots

The only reasion subtitles are loading is because of opensubtitles.

Desktop (if applicable)

OS: macOS Sequoia (Apple Silicon – MacBook Pro M4)

Stremio: v5 Web

Add-ons: Torrentio + Real-Debrid

Smartphone (if applicable)

No response

TV (if applicable)

No response

Logs

Access to fetch at 'https://...download.real-debrid.com/...mkv'
from origin 'https://web.stremio.com' has been blocked by CORS policy:
No 'Access-Control-Allow-Origin' header...
HEAD https://... .mkv net::ERR_FAILED 200 (OK)

Notes

Suspect the issue has to do with the formats of the audio and subtitles contained within the file (e.g. ASS vs srt subtitles). On macOS, streams with ASS subs and/or certain multi-audio layouts aren’t exposed to the UI even though the data is present and playable in external players.

Workarounds that help but aren’t ideal:

Playing the same URL in IINA/mpv (works).

[TRtomasz]

It is normal there will be no embedded subs or audio tracks when you use web app without companion stremio/stremio service. these are not something browsers supports out of the box.

[demiolawunmi]

I highlighted in the bug report on top that stremio service was infact active and still these issues were occuring. In the "to reproduce" section. I mentioned stremio service was active and running.

[TRtomasz]

thanks @demiolawunmi missed this will recheck