enum class EncodingFormat : int
{ANSI = 0,//GBKUTF16LE,UTF16BE,UTF8,UTF8BOM,
};
EncodingFormat VideoPlayer::FileCharacterEncoding(const QString &fileName)
{//假定默認編碼utf8EncodingFormat code = EncodingFormat::UTF8;QFile file(fileName);if (file.open(QIODevice::ReadOnly)){//讀取3字節用于判斷QByteArray buffer = file.read(3);quint8 sz1st = buffer.at(0);quint8 sz2nd = buffer.at(1);quint8 sz3rd = buffer.at(2);if (sz1st == 0xFF && sz2nd == 0xFE){code = EncodingFormat::UTF16LE;}else if (sz1st == 0xFE && sz2nd == 0xFF){code = EncodingFormat::UTF16BE;}else if (sz1st == 0xEF && sz2nd == 0xBB && sz3rd == 0xBF){code = EncodingFormat::UTF8BOM;}else{//嘗試用utf8轉換,如果無效字符數大于0,則表示是ansi編碼QTextCodec::ConverterState cs;QTextCodec* tc = QTextCodec::codecForName("utf-8");tc->toUnicode(buffer.constData(), buffer.size(), &cs);code = (cs.invalidChars > 0) ? EncodingFormat::ANSI : EncodingFormat::UTF8;}file.close();}return code;
}

上面是解析文件格式，下面是按照格式讀取內容

QString srtfile = "D://test.srt";
EncodingFormat code = FileCharacterEncoding(srtfile);QFile file(srtfile);if(!file.open(QIODevice::ReadOnly)) {qDebug()<<"未找到外掛字幕文件："<<srtfile<<endl;}m_SrtInfoLst.clear();QTextCodec::ConverterState state;QTextCodec *codec = QTextCodec::codecForName("UTF-8");if(code==EncodingFormat::UTF16LE){codec = QTextCodec::codecForName("UTF-16LE");}else if(code==EncodingFormat::UTF8){codec = QTextCodec::codecForName("UTF-8");}else if(code==EncodingFormat::UTF8BOM){codec = QTextCodec::codecForName("UTF-8");}else if(code==EncodingFormat::UTF16BE){codec = QTextCodec::codecForName("UTF-16BE");}QTextStream stream_src(&file);stream_src.setCodec(codec);//這里就是按照對應格式解析出來了while(!stream_src.atEnd()) {QString str = stream_src.readLine();//一行一行獲取內容//TODO:......}file.close();