There are times when the audio levels on a recorded presentation are just too low and you may need to increase the volume in order for students to easily hear. While setting the correct levels at the time of recording will produce a better quality we understand that is not always possible so we have created the below work around.
Things you will need
1. The video file as mp4 or mov. This file must have a framerate of at least 24 fps in order for the editing software to load.
2. The editing software Lightworks installed on your machine. Please note, if you already have a video editing software on your machine you should check if that tool has an increase audio option first.
Getting Started with Lightworks
- Lightworks is a free video editing tool that requires free registration in order to use beyond 7 days.
- The free version is pretty robust but it will not export your edited video above 720p resolution. This is usually an acceptable quality for online lecture presentations, but if this is a problem this article will not help you.
- Lightworks Quick Start (demo from Lightworks)
How to Import Media, Adjust Audio and Export
Once you have Lighworks installed please view video tutorial on how to import media, adjust audio levels and export video:
Written steps from video:
Once you have Lightworks installed, open and click Create a New Project > provide a title and choose the frame rate of your video, usually 24 fps is sufficient.
On the bottom left you should see the orange title Libraries > click Local Files to locate and import the video file want to edit
Once you have imported click on the top tab called Edit
Select your video and drag and drop it down to the timeline, move the video and audio tracks over to the start of the timeline.
Click on the top tab called Audio
Looking at the audio track you will see a white dotted line, click on the line and raise it. Be sure to listen as you do this, if you raise all the way the audio is likely to get blown out. To play the audio as you adjust the volume level click space on you keyboard.
Once you have adjusted your audio volume to a level you are happy with go back to the Edit tab.
Select both the Video and Audio tracks (they should be highlighted in yellow) and right click your mouse > choose Export.
The export default settings should be fine, you may want to choose a specific location for your new mp4 to go so it is easy to find.