#874 external subtitle support

CHANGELOG.md

@@ -9,6 +9,7 @@ All notable changes to this project will be documented in this file.
 - Cataloguing: identify Apple variant of HDR images
 - Collection: allow using hash (md5/sha1/sha256) when bulk renaming
 - Info: color palette
+- Video: external subtitle support (SRT)
 - option to force using western arabic numerals for dates
 
 ### Changed

plugins/aves_video_mpv/lib/src/controller.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:io';
 
 import 'package:aves_model/aves_model.dart';
 import 'package:aves_utils/aves_utils.dart';
@@ -9,6 +10,7 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:media_kit/media_kit.dart';
 import 'package:media_kit_video/media_kit_video.dart';
+import 'package:path/path.dart' as p;
 
 class MpvVideoController extends AvesVideoController {
   late Player _instance;
@@ -19,6 +21,9 @@ class MpvVideoController extends AvesVideoController {
   final StreamController<VideoStatus> _statusStreamController = StreamController.broadcast();
   final StreamController<String?> _timedTextStreamController = StreamController.broadcast();
   final AChangeNotifier _completedNotifier = AChangeNotifier();
+  final List<SubtitleTrack> _externalSubtitleTracks = [];
+
+  static final _pContext = p.Context();
 
   @override
   double get minSpeed => .25;
@@ -118,6 +123,22 @@ class MpvVideoController extends AvesVideoController {
     final settingsStream = settings.updateStream;
     _subscriptions.add(settingsStream.where((event) => event.key == SettingKeys.enableVideoHardwareAccelerationKey).listen((_) => _initController()));
     _subscriptions.add(settingsStream.where((event) => event.key == SettingKeys.videoLoopModeKey).listen((_) => _applyLoop()));
+
+    final path = entry.path;
+    if (path != null) {
+      final videoBasename = _pContext.basenameWithoutExtension(path);
+      // list subtitle files in the same directory
+      _subscriptions.add(File(path).parent.list().where((v) => v is File && _isSubtitle(v.path)).listen((v) {
+        final subtitleBasename = _pContext.basename(v.path);
+        if (subtitleBasename.startsWith(videoBasename)) {
+          _externalSubtitleTracks.add(SubtitleTrack.uri(
+            v.uri.toString(),
+            title: 'File ${subtitleBasename.substring(videoBasename.length)}',
+          ));
+          _externalSubtitleTracks.sort((a, b) => a.title!.compareTo(b.title!));
+        }
+      }));
+    }
   }
 
   void _stopListening() {
@@ -280,7 +301,13 @@ class MpvVideoController extends AvesVideoController {
 
   List<AudioTrack> get _audioTracks => _tracks.audio.skip(fakeTrackCount).toList();
 
-  List<SubtitleTrack> get _subtitleTracks => _tracks.subtitle.skip(fakeTrackCount).toList();
+  List<SubtitleTrack> get _subtitleTracks {
+    final externalTitles = _externalSubtitleTracks.map((v) => v.title).toSet();
+    return [
+      ..._tracks.subtitle.skip(fakeTrackCount).where((v) => !externalTitles.contains(v.title)),
+      ..._externalSubtitleTracks,
+    ];
+  }
 
   @override
   List<MediaStreamSummary> get streams {
@@ -375,4 +402,13 @@ class MpvVideoController extends AvesVideoController {
       }
     }
   }
+
+  static bool _isSubtitle(String path) {
+    switch (_pContext.extension(path)) {
+      case '.srt':
+        return true;
+      default:
+        return false;
+    }
+  }
 }

plugins/aves_video_mpv/lib/src/tracks.dart

@@ -36,7 +36,7 @@ extension ExtraSubtitleTrack on SubtitleTrack {
       index: index,
       codecName: null,
       language: language,
-      title: title,
+      title: title ?? '$index ($codec)',
       width: null,
       height: null,
     );

plugins/aves_video_mpv/pubspec.lock

@@ -241,7 +241,7 @@ packages:
     source: hosted
     version: "3.0.0"
   path:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path
       sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"

plugins/aves_video_mpv/pubspec.yaml

@@ -19,6 +19,7 @@ dependencies:
   media_kit_libs_android_video:
   media_kit_native_event_loop:
   media_kit_video:
+  path:
 
 dev_dependencies:
   flutter_lints: