Sometimes when using a video clip in your ProShow slideshows, you may only want the visuals from the video to appear and not the audio. In essence, you want to mute your video clip’s audio so that just your show’s soundtrack plays.
To do this in ProShow Gold and ProShow Producer, double-click on the slide that contains your video to bring up the Slide Options dialog. Now, click on your video layer on the left, go to Layer Settings > Video Settings and lower the video clip volume to 0%. This will mute your video so that your slideshow’s soundtrack plays and you won’t hear the video clip’s audio.
If you’re using ProShow Web, upload your video clip and make sure it’s selected. Towards the bottom right of the screen you’ll see a series of buttons next to the video preview. Select the button for ‘Mute’ and your video clip will be muted when it plays back in your slideshow.