targetSubtitleFromVideo static method

Implementation

static Future<SubtitleItem?> targetSubtitleFromVideo({
  required File file,
  required Language language,
  required Function(SubtitleItem) onItemComplete,
}) async {
  Directory appDocDir = await getApplicationDocumentsDirectory();
  Directory subsDir = Directory('${appDocDir.path}/targetSubtitles');
  if (!subsDir.existsSync()) {
    subsDir.createSync(recursive: true);
  }

  String inputPath = file.path;

  String threeLanguageCode = language.threeLetterCode;
  String outputPath = '${subsDir.path}/extractSrt.srt';
  String command =
      '-loglevel quiet -i "$inputPath" -map 0:m:language:$threeLanguageCode -map -0:a -map -0:v "$outputPath"';

  File outputFile = File(outputPath);

  if (outputFile.existsSync()) {
    outputFile.deleteSync();
  }

  final FlutterFFmpeg _flutterFFmpeg = FlutterFFmpeg();

  await _flutterFFmpeg.execute(command);

  await Future.delayed(const Duration(seconds: 1));

  if (outputFile.existsSync()) {
    SubtitleItem item = await subtitlesFromFile(
      file: outputFile,
      type: SubtitleItemType.embeddedSubtitle,
    );
    onItemComplete(item);
    return item;
  } else {
    return null;
  }
}