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6.6

Send/receive an JPEG image

Asked by Tango42 in Delphi Programming, Graphics

Tags: nmudp, send, stream

Hi,
I am trying to make a image transmission program and a image receiving program on two different computers. The idea is that I load an JPEG image in the transmission program and when I push a send button it should send the JPEG image as a stream to the other computer. I use the NMUDP component on both computers. But I keep getting an error 'access violation at 0x77f60b6f: write of address 0xfd4' when I push the send button... Can anyone see what I am doing wrong... Or does anyone have some source code, that sends and receives an image using UDP.... My procedure is shown below:

procedure TTransmitterForm.btnTransmitClick(Sender: TObject);
var
MyStream: TMemoryStream;
Jpg: TJPEGImage;
begin
NMUDP.RemoteHost := Edit1.Text;
NMUDP.RemotePort := StrToInt(Edit2.Text);
//Create a JPEG image and assign the loaded picture
Jpg := TJPEGImage.Create;
Jpg.Assign(Image.Picture);
try
// Create a stream and save the image to the stream
MyStream := TMemoryStream.Create;
Jpg.SaveToStream(MyStream);
MyStream.Position := 0;
NMUDP.SendStream(MyStream);
finally
MyStream.Free;
Jpg.Free;
end;
end;

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Send/receive an JPEG image

Asked by Tango42 in Delphi Programming, Graphics

Tags: nmudp, send, stream

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