[FFmpeg-user] Blackmagic Intensity Pro - how to capture video with audio?

Damian Głodny damian at artnmedia.pl
Mon Sep 8 14:12:13 CEST 2014

Hello, I have Blackmagic Intensity Pro video card and I want to stream video
from that card to multicast using ffmpeg. But my problem is that I can get
only video from that card, no audio. 

Ok, time for some commands.


List of my dshow devices:


ffmpeg -list_devices true -f dshow -i dummy


[dshow @ 0000000004437720] DirectShow video devices

[dshow @ 0000000004437720]  "Blackmagic WDM Capture" <- it is Intensity Pro

[dshow @ 0000000004437720] DirectShow audio devices



As you can see Intensity Pro does not provide a separate DirectShow audio



Blackmagic WDM Capture options:



ffmpeg -f dshow -list_options true -i video="Blackmagic WDM Capture"


[dshow @ 00000000043e7720] DirectShow video device options

[dshow @ 00000000043e7720]  Pin "Video Capture"

[dshow @ 00000000043e7720]   pixel_format=uyvy422  min s=1280x720 fps=50 max
s=1280x720 fps=50

[dshow @ 00000000043e7720]  Pin "Audio Capture"



As you can see THERE IS a pin called "Audio Capture".  But how I can use it?



So here is my question: how I can map that Audio Capture pin as a ffmpeg
audio input?


I tried following commands (ffplay):

ffplay -f dshow -i video="Blackmagic WDM Capture" -> I can see only video,
no sound

ffplay -f dshow -i video="Blackmagic WDM Capture":audio="Blackmagic WDM
Capture" -> error: [dshow @ 0000000002a8f480] Could not find audio device.


Is it possible or Intensity Pro "is not compatible" with ffmpeg?








More information about the ffmpeg-user mailing list