Convert QByteArray to object and vice versa

[DiamonDogX]

I have a data structure:

typedef struct
{
    QString IpAddress;
    int Port;
} VideoSource;
 
Q_DECLARE_METATYPE( VideoSource )

typedef struct
{
    QString IpAddress;
    int Port;
} VideoSource;

Q_DECLARE_METATYPE( VideoSource )

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All I want to do is be able to convert this to a byte array in order to send on a socket, and get the object back (deserialize) on the other end. So I am doing this:

int videoSourceMetaTypeId = qRegisterMetaType< VideoSource >();
...
...
VideoSource vs;
vs.IpAddress = "127.0.0.1";
vs.Port = 5678;
QVariant videoSourceAsVariant;
videoSourceAsVariant.setValue( vs );
QByteArray videoSourceBytes = videoSourceAsVariant.toByteArray();
int numBytes = videoSourceBytes.count(); // this is 0

int videoSourceMetaTypeId = qRegisterMetaType< VideoSource >();
...
...
VideoSource vs;
vs.IpAddress = "127.0.0.1";
vs.Port = 5678;
QVariant videoSourceAsVariant;
videoSourceAsVariant.setValue( vs );
QByteArray videoSourceBytes = videoSourceAsVariant.toByteArray();
int numBytes = videoSourceBytes.count(); // this is 0

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Not sure why the byte array's size ends up being 0.
So how do I get the object back? Was trying this but obviously it's wrong...

QVariant testVar( videoSourceBytes );
    if( testVar.canConvert< VideoSource >() )  // returns false
    {
        VideoSource testVs = testVar.value< VideoSource >();
    }

QVariant testVar( videoSourceBytes );
    if( testVar.canConvert< VideoSource >() )  // returns false
    {
        VideoSource testVs = testVar.value< VideoSource >();
    }

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