Not possible to set external player for ISO files by default

[Solarunit]

Bug report

Describe the bug

Not possible to set external player for ISO files by default.
I have tried different rules combinations to force play ISO files with external player but internal VideoPlayer is always selected as default one.
I can select external player to play ISO files from the Play Using context menu and it works.

My rules examples:

<rule name="dvdimage" dvdimage="true" player="my-player" />
<rule name="iso" filetypes="iso|ISO" player="my-player"/>

Here is kodi log:

debug <general>: CPlayerSelectionRule::GetPlayers: matches rule: discimage
debug <general>: CPlayerSelectionRule::GetPlayers: adding player: VideoPlayer for rule: discimage

Kodi adds VideoPlayer as default one.

Expected Behavior

External player should be default player when it was set to play ISO files in the playercorefactory.

Actual Behavior

VideoPlayer as set to be default player instead of external player.

Possible Fix

• maybe there is a way to disable system rule (for discimage) or override it?
• force external player rule for ISO files

To Reproduce

Steps to reproduce the behavior:

1. Set rule for ISO files to play them in external player (or script)
2. Play ISO file
3. See in kodi logs that VideoPlayer is set as default player

Debuglog

Here is kodi log:

debug <general>: CPlayerSelectionRule::GetPlayers: matches rule: discimage
debug <general>: CPlayerSelectionRule::GetPlayers: adding player: VideoPlayer for rule: discimage

Kodi adds VideoPlayer as default one.

Your Environment

Used Operating system:

• Android

• iOS

• tvOS

• Linux

• macOS

• Windows

• Windows UWP

• Operating system version/name: Solus

• Kodi version: Kodi 20.5 flatpak

[Solarunit]

found related issue #15841

If this rule is disabled in /system/playercorefactory.xml :

<rule name="discimage" discimage="true" game="false" player="VideoPlayer" />

https://github.com/xbmc/xbmc/blob/master/system/playercorefactory.xml#L29

then external player can play ISO files by default.

VideoPlayer is also listed in the Play using menu and can play ISO file too.

I assume that /system/playercorefactory.xml file would be overwritten on the any next Kodi update, so this is a bad workaround.