static MediaFile()
{
streams = new Dictionary <string, Stream>();
// Create FFmpeg protocol for reading .NET streams
protocol = new URLProtocol();
protocol.openfunc = Open;
protocol.readfunc = Read;
protocol.seekfunc = Seek;
protocol.closefunc = Close;
protocol.name = "stream";
// Write protocol to pointer
streamprotocol = Allocate <URLProtocol>();
Marshal.StructureToPtr(protocol, streamprotocol, false);
// Register protocols and codecs with FFmpeg
FFmpeg.av_register_all();
FFmpeg.register_protocol(streamprotocol);
}
/// <summary>
/// Register FFmpeg for all convert requests.
/// Method is called once by FFmpegManager on application load.
/// </summary>
public void RegisterFFmpeg()
{
if (_ffmpegRegistered)
{
return;
}
try
{
// Setup Data list / attributes
_nextConvertId = 0;
_videoMemoryStreams = new Dictionary <int, MemoryStream>();
// Create defraser (input) protocol
_protocol = new URLProtocol();
_protocol.openfunc = ProtocolOpen;
_protocol.readfunc = ProtocolRead;
_protocol.seekfunc = ProtocolSeek;
_protocol.closefunc = ProtocolClose;
_protocol.name = "defraser";
// Write protocol to pointer
_pDefraserProtocol = Allocate <URLProtocol>();
Marshal.StructureToPtr(_protocol, _pDefraserProtocol, false);
// Register DLL and 'defraser' protocol
_ffmpeg.AvRegisterAll();
_ffmpeg.RegisterProtocol(_pDefraserProtocol); // calls av_register_protocol
_ffmpegRegistered = true;
}
catch (Exception e)
{
Console.Error.WriteLine(e.Message + Environment.NewLine + e.StackTrace);
//MessageBox.Show("FFmpeg was not able to register itself, frame visualisation is not available." + Environment.NewLine + e.Message,"FFmpeg not available",MessageBoxButtons.OK,MessageBoxIcon.Error); //FIXME: add commandline argument to be visual-style or user interaction allowed or not.
}
}
public static extern int register_protocol(ref URLProtocol protocol);
