I am still trying to sort out the best way to capture lossless AVI using my Blackmagic Decklink Mini Recorder. Currently am working on vdub and believe I am closer to understanding why vdub (including vdub2) garbles the audio:
When listing available directshow devices in ffmpeg, I am getting:
"Blackmagic WDM Capture" (audio, video)
"Decklink Video Capture" (video)
"OBS Virtual Camera" (video)
"Line In (Blackmagic DeckLink Mini Recorder 4K Audio)" (audio)
"Decklink Audio Capture" (audio)
I have tried to do a basic capture in ffmpeg specifying:
Code:
video="Blackmagic WDM Capture":audio="Blackmagic WDM Capture"
(i.e. same device for video and audio as intended) the audio sounds great. However if I do the capture using:
Code:
video="Blackmagic WDM Capture":audio="Line In (Blackmagic DeckLink Mini Recorder 4K Audio)"
the audio is tremendously distorted and out of sync.
To replicate this in vdub/vdub2 I tried to specify the video source and audio source as "Blackmagic WDM Capture", however when doing this vdub displays a black screen and once I activate capture, the error "Unable to Start Capture" is thrown.
When I in vdub specify the sources video: Blackmagic WDM Capture" and audio: "Line In (Blackmagic DeckLink Mini Recorder 4K Audio)" I get the same distortion as when doing this through ffmpeg.
So it could seem that vdub doesnt support "hybrid" devices which are both video and audio sources such as "Blackmagic WDM Capture" (audio, video). I also tried various combinations using "Decklink Video Capture" (video) and "Decklink Video Capture" (audio) but neither of these seems to provide any stream at all - not sure what they are meant for.
I guess in the end I may end up working up a good set of syntaxes I can use in ffmpeg, although I was hoping to be able to use a GUI of some sort to capture.
Any thoughts / workaround ideas would be appreciated.