Hello,

I am new to vMix, and think the software will do exactly what I need, except I am concerned about the recording of the audio. I would like to use vMix at a live dancing competition, where there are 4 adjudicators who give commentary on the performances. We currently have 6 channels of embedded audio in an HD-SDI video/audio stream (the first 2 are the music of the performance, the last 4 are each individual judge talking into a microphone). This HD-SDI stream is provided by a third party and we can't really mess with their setup or hardware. The video capture system is PC based, and they are using Blackmagic Decklink cards.

Each 3-minute performance is recorded individually, and we want to create a single MP4 file with the 6 channels of embedded audio for each routine. Blackmagic's Media Express will embed the 6 channels of audio into a single file, however the codecs offered will not work for us (no MP4 option). The Mac version of Media Express WILL record to MP4, however as I said before the existing system is entirely PC based. The recorded file is then put online and immediately viewable by the contestant after the performance.

Is this possible with vMix? Ideally we would like to record each audio channel as unique TRACKS in the recorded video file (1 audio channel per track) however we can re-map the channels to separate tracks using FFMPEG before we upload to the internet if necessary.

Thank You for any help in advance!

Hi Rich, Thank You for assisting me. I am able to do as you suggested, however I am only getting two recorded channels. I believe my "Audio Outputs" settings may be incorrect, they are currently on the default settings of the following:
Master Output: Default Windows Playback Device (1+2)
Headphones: Default Windows Playback Device (1+2)
A: None (1+2)
B: None (1+2)

In the "Audio" settings menu, the "Recording Audio" is set to: vMix Audio M A B.

Not sure what I'm doing wrong?

I think the step that is missing is setting the audio source as MAB in the recording setup.

(I don't know what the recording audio setting in the advanced settings part of the audio section in settings does but I've been able to record 6 channels with it still set to it's default of "vMix Audio")

Annotation 2019-07-02 065935.jpg (51kb) downloaded 2 time(s).

Change the option in Settings -> Audio -> Show Advanced Settings -> Recording Audio back to the default of vMix Audio and it should work.

Happening to me too, like for couple weeks I can't hear anything from internal soundcard even if I set it on mastero or BUS still can't hear anything but meters are visible

I know this post is old but it changed my life today !
I thought (never really tried) that MAB or whatever more than 1 stereo channel recording would simply mix all to a stereo track on the MP4, but now I see we can record multichannel !!!
WOW