AVCapture2

Supported Hardware Devices: Pro Capture cards, USB Capture devices

Contents Demonstrated in the Sample:

1. Preview captured video and monitor captured audio
2. Freely select video capture devices and their corresponding audio devices
3. Freely switch capture parameters: resolution, frame rate, color space
4. Support multi-channel capture: simultaneously capture one or two audio/video streams and render them separately

Call Logic:

1. Obtain version information, initialize and enumerate devices: MWGetVersion, MWCaptureInitInstance, MWRefreshDevice, MWGetChannelCount
2. Filter supported devices based on device information and interface information: MWGetChannelInfoByIndex
3. Create a video rendering layer and overlay it on the current window: createPreviewLayer
4. Open channel: MWGetDevicePath, MWOpenChannelByPath
5. Create audio renderer: MWAudioRenderCreate, MWAudioRenderStart
6. Start video capture: MWCreateVideoCapture
7. Start audio capture: MWCreateAudioCapture
8. Enter main thread loop
9. Click menu to switch audio/video channels or capture parameters:
   1. Stop audio capture: MWDestroyAudioCapture
   2. Stop video capture: MWDestroyVideoCapture
   3. Destroy audio renderer: MWAudioRenderStop, MWAudioRenderDestroy
   4. Close channel: MWCloseChannel
   5. Open channel and capture/render according to set channel and capture parameters: steps 4, 5, 6, 7
10. After clicking the close button, exit capture and release resources:
    1. Stop audio capture: MWDestroyAudioCapture
    2. Stop video capture: MWDestroyVideoCapture
    3. Destroy audio renderer: MWAudioRenderStop, MWAudioRenderDestroy
    4. Close channel: MWCloseChannel
    5. Destroy instance: MWCaptureExitInstance.

Result:

Flowchart: