modify audio volume of video file?

Hi,

I want to take an existing video file and modify just the volume of that file.  I don't want expensive editing or overly powerful editing tools, I just want to change the volume.

What simple (and hopefully free) software would allow me to do that?  My files will most likely be mp4, mov and mpeg.

If that does not exist, then I would like to be able to strip off the audio (I can modify it in Audacity) and reattach it to the video.  The first method is preferred, though.

Thanks!
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ugebAsked:
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Leslie BloomCorporate & Product Marketing ManagerCommented:
If you are using the Mac OS, iMovie will be of help - http://www.apple.com/mac/imovie/

iMovie support article for adjusting volume from a video - https://support.apple.com/kb/PH14709?locale=en_US

If you are running Windows, Movie Maker will be of help - http://windows.microsoft.com/en-gb/windows-live/movie-maker

To adjust the volume in Windows Movie Maker:

On the Audio or Audio/Music track of the timeline, select the audio clip whose volume you want to adjust.

Click Clip, point to Audio, and then click Volume.

To adjust the volume, do one of the following:
To reduce the volume, slide the Audio volume level slider to the left.
To increase the volume, slide the Audio volume level slider to the right.
To mute the clip, select the Mute clip check box.
To reset the volume to the original volume, click Reset.
ugebAuthor Commented:
This looks interesting, thank you.

I may need to clarify.  I don't want to change the volume of the whole track, but rather there are places within the file that I want to adjust.  For example, let's say there was a loud explosion and I just wanted to lower the volume for a couple of seconds and then return the volume to normal.  Another example, let's say someone used a bad word and I wanted to silence it out.

Can I do that with Movie Maker or what else could I use? (I'm on Windows)

Thanks!
Leslie BloomCorporate & Product Marketing ManagerCommented:
You can do it with Movie Maker, although it's a little odd. This free software doesn't let you directly edit the waveforms of the audio, but you can edit the basic audio volume of certain 'clips'.

What you can do is open the video in Movie Maker, and create clips (just by 'splitting' the video, it won't alter the video playback) and then adjust the basic audio levels of those specific clips.

1. Navigate in the right frame of Movie Maker to the place in the video you want to start your clip.
2. Select "Split" from the top menu.
3. Navigate in the right frame of Movie Maker to the place in the video you want to end your clip.
4. Select "Split" from the top menu.
5. Now you have made a clip of the video!
6. Click on the clip in the right frame of Movie Maker, it should only highlight the area you created.
7. Select "Video Volume" from the top menu, and adjust as needed. This will only adjust the video volume for the clip you selected.
8. In the left frame of Movie Maker, click the play button to preview the file and adjust accordingly.
9. Be sure to save your work!

moviemaker.PNG

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ugebAuthor Commented:
Thank you, I will try that .
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