Qt Data transfer

[anda_skoa]

If you want to dynamically allocate the buffer, then you should use QAbstractSocket::bytesAvailable() to find out what is waiting, then allocate your array to that size before calling read().

Sure, but dynamically allocating memory is what we are trying to avoid here :-)
If that would be OK the easiest way would be to use use the original code.

1+2. Data = new char(0); is this good?what is the optimal size ,if there is such a thing, in defining the buffer? is leaving it zero is ok?

As already mentioned, this allocates a single char.

char *buffer = new char[1024]; // allocate 124 chars

char *buffer = new char[1024]; // allocate 124 chars

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or simply have a QByteArray member in your class and either initialize it with the buffer size or call reserve() with the buffer size.
Nice side effect of this is that you don't have to take care about deleting the memory later on.

Cheers,
_

[ChrisW67]

Dumb question, is your program doing anything to the data coming from netcat before you send it to mplayer?