2.4.5 Streaming Encoder

Streaming encoder functionality is supported by certain DeckLink devices such as the H.264 Pro Recorder. Uncompressed video and audio streams may be encoded into a compressed bitstream and made available to suitable applications involving compressed video and audio.

2.4.5.1 Streaming Encoder Capture

An application performing a typical streaming encoder capture operation should perform the following steps:

• Enumerate the preset video encoding modes by calling IBMDStreamingDeviceInput::GetVideoEncodingModePresetIterator(). For each reported video encoding mode call IBMDStreamingDeviceInput::GetCurrentDetectedVideoInputMode() and IBMDStreamingDeviceInput::DoesSupportVideoEncodingMode() to check if the current video input mode and video encoding mode are supported.

• If desired, call IBMDStreamingVideoEncodingMode::CreateMutableVideoEncodingMode() to change the encoder bitrate or other encoder settings.

• IBMDStreamingDeviceInput::SetVideoEncodingMode()

• IBMDStreamingDeviceInput::SetCallback()

• IBMDStreamingDeviceInput::StartCapture()

While capture is running:

• receive calls to IBMDStreamingH264InputCallback::MPEG2TSPacketArrived() with MPEG transport stream data to process both compressed video and audio alternatively, receive calls to IBMDStreamingH264InputCallback::H264NALPacketArrived() and IBMDStreamingH264InputCallback::H264AudioPacketArrived() to process compressed video and audio data separately.

• IBMDStreamingDeviceInput::StopCapture()