Graphics

Hey Folks, I've checked this almost everywhere, including Ross Support. Thought I'd throw it out there.

Is there a way to mute or turn down audio that is embedded in a video clip? In a newsroom situation, the producer chooses the video clip with the embedded audio, and that is assigned to a Quad with published material. I would like to have that audio muted so that different audio can play and be heard. 

Instead of re-rendering a lot of clips to take the audio out, I'd rather have Xpression mute it.

I'm working with version 6.5. Thanks for any suggestions.

Hey John,

I'm not sure if this will work, but when you look in the material and select the Video shader, there's a tab called "Audio".

In that tab you can select to set the Channel Mapping of the video.

If you click on it, a popup will be shown and by default the audio will be sent to channel 1 and 2. I can imagine that if you uncheck these channels, that your audio will be muted during playout.

I haven't checked this since I don't have a way here to check embedded audio but it just might work?

And since you are using the same material all the time, even when you select another videoclip, the audio should stay muted I think.

By the way the above screenshot was taken on version 6.7, but I assume it will be the same for version 6.5.

Hey Kenneth,

Thanks for the help. What you suggested didn't work for me but it got me started on the right path. I think when the audio is embedded and the file is replaced by a producer in a newsroom, it just gets passed through.

I found this post that led me to the solution. xpVideoShader.SetVolumeLevel

You can set the volume level in a video shader with SetVolumeLevel.

That way, with scripting, the audio can be muted no matter what video file is chosen.

You'll be pleased to know that on newer versions of XPression you can actually get at the DB levels inside the shader.