Capture to Memory

[c-michail]

Hello,
Can you add capturing to eg. TStream instead of a file ?
Also the ability to Get/Remove a single frame.
This will be suitable for streaming purposes!

Thank you

[FactoryXCode]

Hi,
Can you provide a sample or piece of code from your project?
If so, please drop it in the sandbox directory.
If not, you better read the Microsoft documents about Media Foundation and the streaming chapter: Networking in Media Foundation

Thank you, Tony.

[FactoryXCode]

You could do it like this:

//
// Dumps the media buffer contents of an IMFSample to a stream.
// [in] pSample: pointer to the media sample to dump the contents from.
// [in] pStream: pointer to the stream to write to.
//
function WriteSampleToStream(pSample: IMFSample;
                                                   pStream: TStream): HResult;
var
  hr: HResult;
  strres: LongInt;
  MediaBuffer: IMFMediaBuffer;
  BufferLength: DWORD;
  ByteBuffer: PByte;
  BufferMaxLength: DWORD;
  BufferCurrLength: DWORD;

label
  done;

begin
  strres := 0;

  hr := pSample.ConvertToContiguousBuffer(MediaBuffer);

  if SUCCEEDED(hr) then
    hr := MediaBuffer.GetCurrentLength(BufferLength);

  if SUCCEEDED(hr) then
    begin
      BufferMaxLength := 0;
      BufferCurrLength := 0;
      hr := MediaBuffer.Lock(ByteBuffer,
                             @BufferMaxLength,
                             @BufferCurrLength);
    end;
  if SUCCEEDED(hr) then
    strres := pStream.Write(ByteBuffer,
                            BufferLength);
  if (strres = 0) then
    hr := E_FAIL;

done:
  Result := hr;
end;

Regards, Tony.

[FactoryXCode]

Further information you might find in the MFCameraFrameCapture sample.
That sample uses the TMemoryStream, descendant of TStream.

Regards, Tony.