Please reformat your post, it does not show up correctly on this forum. Most notably, the picture is missing :-)

@VRonin said in Save a text file with Windows/Dos line endings but while preserving encoding in QT.:

if you save text use text mode on the device: if(!file.open(QIODevice::ReadOnly | QIODevice::Text)) and if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) everything else comes for free

I thought the whole point of his question is precisely that he wants to produce text files which are not native to the OS, specifically he wants Windows \r\n regardless of whether his app is running under Win or Linux. That was why I was saying don't use endl etc., and of course you mustn't use QIODevice::Text. Maybe I misunderstood... :)

[SOLVED]

Replace

playlist->load(QUrl::fromLocalFile("C:/Users/Marco/Music/default.m3u"), "m3u");

with

QFile inputFile("C:/Users/Marco/Music/default.m3u"); if (inputFile.open(QIODevice::ReadOnly)) { QTextStream in(&inputFile); in.setCodec("UTF-8"); while (!in.atEnd()) { QString line = in.readLine().trimmed().toUtf8().constData(); playlist->addMedia(QUrl(QFileInfo(line).filePath())); } inputFile.close(); }

and

playlist->save(QUrl::fromLocalFile("C:/Users/Marco/Music/default.m3u"), "m3u");

with

QFile outputFile("C:/Users/Marco/Music/default.m3u"); outputFile.open(QIODevice::WriteOnly|QIODevice::Text); for (int i=0; i < playlist->mediaCount(); i++) { //… QTextStream out(&outputFile); out << mediafile[0].toUpper()+mediafile.mid(1) << endl; //… } outputFile.close();

Thanks @kshegunov !

The c_str() was just something we tested along the way!
The original code was

// Create a Json document from text. Fails for foreign characters! QJsonDocument doc = QJsonDocument::fromJson(msg.toUtf8(), &error);

However, all the variations we/I have tried display the same problem (on CentOS 6.5, as we have discovered).