FLV

[Back] This is a page for FLV file analysis (Header). Try sample file:

Try an example

File 1. File 1 View
File 2. File 2 View
File 3. File 3 View

What are we looking for?

For an FLV file, we are looking for "FLV" or, in hex, 46 4C 56 at the start of the file.

Try your own

Or enter your own URL to analyse the first six sectors of the file:

File contents analysis

Object reference not set to an instance of an object.

Sample code

  public string getFlv(byte[] b)
        {
            string TextBox1 = "";
            try
            {
                    
                TextBox1 += "Byte 0 [Should be 46]: " + Global.intToHex(b[0]) + "<br/>";
                TextBox1 += "Byte 1 [Should be 4c]: " + Global.intToHex(b[1]) + "<br/>";
                TextBox1 += "Byte 2 [Should be 56]: " + Global.intToHex(b[2]) + "<br/>";
                TextBox1 += "Byte 3: Version (should be 1): " + Global.intToHex(b[3]) + "<br/>";
                TextBox1 += "Byte 4: Flags (should be 5 - audio and video): " + Global.intToHex(b[4]) + "<br/>";
              
                uint filesize = ((uint)b[8] << 24) + ((uint)b[7] << 16) + ((uint)b[6] << 8) + ((uint)b[5]);
            }
            catch { }

            return (TextBox1);
        }