Troubé with Base64 and qCompress/qUncompress

I need to compress and coded a QString in base 64. I wrote 2 methods for this task. These methods are:

/*
* Compress a QString and converts to Base 64
*/
QString BlackBerry10Utils::compressAndBase64(const QString ¶mString)
{
    QByteArray byteArray;
    byteArray.append(paramString);

    byteArray = qCompress(byteArray);
    byteArray.toBase64();
    byteArray.remove(0, 4);

    QString result = QString(byteArray);

    return result;
}

/**
 * Converts from Base 64 and un-compress a QString
 */
QString BlackBerry10Utils::base64AndUnCompress(const QString ¶mString)
{
    QByteArray byteArray;
    byteArray.append(paramString);

    byteArray = QByteArray::fromBase64(byteArray);
    byteArray = qUncompress(byteArray);

    QString result = QString(byteArray);

    return result;

}

And my test code:

QString str ("Hello, World!");
Str = BlackBerry10Utils::compressAndBase64 (str);

Str = BlackBerry10Utils::base64AndUnCompress (str);

However, the process does not return a str than its original value.

I used the same method in Android, Java, BlackBerry, WindowsPhone, and works very well...

There is a line in base64AndUnCompress:

QString result = QString(byteArray);

It is the equivalent of the call to QString::fromAscii() which does not work properly for most of encodings.

Try to replace it with:

QString result = QString::fromUtf8(byteArray.data(), byteArray.size());

To do the same thing according to compress too much, but it is not important for base64-encoded data, it does not use the 8th bit.

In compressAndBase64, replace

   QByteArray byteArray;
    byteArray.append(paramString);

with

QByteArray byteArray(paramString.toUtf8());

Tags: BlackBerry Developers

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Could someone please help me solve this problem?

Not only based on what you already said.

I want to create a film based on shots from my personal camera. I started to work with IMovie to create a sequence of opening and added his musical band. I exported the scenes in Quick Time format without any problem. However, when I merge the exported sequence of I film with shots of my video camera, the soundtrack is completely eliminated.

How would you"merge" files? (I.e. a "QuickTime" format is any form of data compatible with the platform of supply and the specific structure of QT incorporated into real employment that is stored in a container of MOV file on any of up to 99 tracks possible). Also, what app do you use for reading the file 'merged '? (For example, some media players ignore secondary audio tracks as a result of some methods of 'fusion' of files so it is important to know how the files are "merged," whether or not the audio data are "scattered" several tracks, and/or if the Media Player supports playback of multiple, sequential audio popular.)

I checked on the Internet and saw that there might be a problem of "Codecs". To avoid this, I exported the sequence IMovie with Codecs of same as one of my video camera files.

The specific codecs and settings using the specific version of iMovie? (The current Mac OS X operating systems have two X QT and 'classic' Qt integrated structure so it is important to know what structure is used here and how).

Now, if I compare the files exported from I Movie and those of my video camera, they have identical characteristics. However, the soundtrack will always disappear when I merge them.

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