Change subtitle preferences to prefer forced-only and PGS

- Change prefer_srt_over_pgs default from true to false
  PGS has better quality when burned in during transcoding

- Add only_forced_subtitles setting (default: true)
  When enabled, only forced subtitles are selected
  Regular subtitles are skipped even if they match the language

- Skip non-forced subtitles in auto-selection when only_forced is enabled
  Prevents selecting regular German subs when watching German content
  Only shows forced subs for foreign language parts

This is useful for native language content where only foreign
language parts need subtitles (forced), not the entire movie.

resources/language/resource.language.de/strings.po

@@ -1325,3 +1325,7 @@ msgstr "Bei keinem Treffer automatisch 'Keine Untertitel' wählen"
 msgctxt "#30701"
 msgid "Abspielen mit Track-Auswahl"
 msgstr "Abspielen mit Track-Auswahl"
+
+msgctxt "#30702"
+msgid "Nur Forced-Untertitel auswählen (keine normalen)"
+msgstr "Nur Forced-Untertitel auswählen (keine normalen)"

resources/language/resource.language.en_gb/strings.po

@@ -1316,3 +1316,7 @@ msgstr "Auto-select 'No subtitles' if no match found"
 msgctxt "#30701"
 msgid "Play with track selection"
 msgstr "Play with track selection"
+
+msgctxt "#30702"
+msgid "Only select forced subtitles (no regular subs)"
+msgstr "Only select forced subtitles (no regular subs)"

resources/lib/play_utils.py

@@ -810,6 +810,7 @@ def audio_subs_pref(url, list_item, media_source, item_id, audio_stream_index, s
     preferred_sub_lang = sub_lang_index_map[sub_lang_index] if sub_lang_index < len(sub_lang_index_map) else ''
 
     prefer_forced = settings.getSetting("prefer_forced_subtitles") == "true"
+    only_forced = settings.getSetting("only_forced_subtitles") == "true"
     prefer_srt = settings.getSetting("prefer_srt_over_pgs") == "true"
     auto_no_subs = settings.getSetting("auto_no_subtitles_if_no_match") == "true"
 
@@ -965,8 +966,8 @@ def audio_subs_pref(url, list_item, media_source, item_id, audio_stream_index, s
         auto_selected = None
         best_score = -1
 
-        log.debug("Auto-selecting subtitle: preferred_lang={0}, prefer_forced={1}, prefer_srt={2}".format(
-            preferred_sub_lang, prefer_forced, prefer_srt))
+        log.debug("Auto-selecting subtitle: preferred_lang={0}, prefer_forced={1}, only_forced={2}, prefer_srt={3}".format(
+            preferred_sub_lang, prefer_forced, only_forced, prefer_srt))
 
         for stream in subtitle_streams_data:
             score = 0
@@ -975,6 +976,12 @@ def audio_subs_pref(url, list_item, media_source, item_id, audio_stream_index, s
             is_forced = stream.get('IsForced', False)
             is_default = stream.get('IsDefault', False)
 
+            # Skip non-forced subtitles if only_forced is enabled
+            if only_forced and not is_forced:
+                log.debug("Skipping non-forced subtitle {0} ({1}) - only_forced is enabled".format(
+                    stream_lang, stream['Index']))
+                continue
+
             # Score based on language match
             if preferred_sub_lang and language_matches(stream_lang, preferred_sub_lang):
                 score += 100

resources/settings.xml

@@ -54,7 +54,8 @@
 		<setting id="auto_select_default_audio" type="bool" label="30687" default="true" visible="true"/>
 		<setting id="preferred_subtitle_language" type="select" label="30688" lvalues="30699|30691|30692|30693|30694|30695|30696|30697|30698" default="1" visible="true"/>
 		<setting id="prefer_forced_subtitles" type="bool" label="30689" default="true" visible="true"/>
-		<setting id="prefer_srt_over_pgs" type="bool" label="30690" default="true" visible="true"/>
+		<setting id="only_forced_subtitles" type="bool" label="30702" default="true" visible="true"/>
+		<setting id="prefer_srt_over_pgs" type="bool" label="30690" default="false" visible="true"/>
 		<setting id="auto_no_subtitles_if_no_match" type="bool" label="30700" default="true" visible="true"/>
                 <setting id="max_play_queue" type="slider" label="30447" default="200" range="20, 10, 1000" option="int" visible="true"/>