Normalize Audio Volume Levels in Video on Mac with Sound Normalizer

Sound Normalizer IconDifferent volume levels in videos can be a real pain. I have a folder with dozens of music videos that I like to watch from time to time, and often one song will be very quiet and I need to raise the volume to hear it, then the next song will blow the speakers apart because it is so loud.

Sound Normailzer fixes all of that by adjusting the volume of each video to be the same – so you can set your volume once then sit back and enjoy your videos.

Sound Normalizer Default ScreenThe program seems to be built on, or at the very least modeled after MP3Gain Express For Mac, so for those of us who have normalized our music collection, the interface and simple usability will be very familiar.

Just drag and drop your video files into Sound Normalizer, and it will start analyzing the volume levels.

Sound Normalizer Analyzing Video FilesOnce analysis has finished, you will see the results listed. It shows you the current dB rating of the track, and the amount of gain it needs to apply or subtract to achieve the desired dB level. The desired level is set by default 89dB which is pretty much the standard most people will want. You can adjust this if you want to, but I advise leaving it alone.

Sound Normalizer Results

If you are happy to proceed and make the changes to your videos, press “Apply Gain” in the bottom right hand corner, and Sound Normalizer will start fixing up your videos.

The good thing is that it doesn’t actually adjust your original video, it adjusts a copy, and saves it to a new location which can be selected in the preferences. The new copy’s file name is appended with the normalization target dB, which in most cases will be 89dB.

Sound Normalizer OutputSound Normalizer works with all of the most popular Video AND Audio file types.
Video formats such as MP4, MKV, FLV, AVI, RMVB, WebM, 3GP, TS, M2TS, MTS, MOV, WMV, MPG, DivX, etc.
Audio formats such as MP3, WMA, AAC, AC3, AU, M4A, MMF, OGG, FLAC, WAV, MP2, etc.

File Types

Sound Normalizer is not free however, but it is well worth the $7.99 price tag. Grab your copy today in the app store, or find out more on Sound Normalizers Preview Page HERE.

Normalize Audio Volume Levels in your MP4 Videos with MP4Gain

MP4Gain – Normalize Audio Volume Levels in your MP4 Videos

MP4Gain-Logo

Mac users please see my Mac specific article HERE.

I have been saving episodes of the Discovery Channel show “How It’s Made” for years. Recently I compiled and organized them into an archive on my WDTV Live Hub, and I found that as I have used several different devices to record the episodes over the years, the audio volume levels range from barely audible to deafening. I needed a way to make the audio volume level of all of my mp4 video files the same. This process is called “Normalizing”.

A Google search returned only one batch MP4 volume normalizer of note, MP4Gain. The author offers a trial version, which I downloaded and installed. This is what the main window looks like.

mp4gain video normalizer main windowThe program is VERY easy to use. For straight out “Normalizing” all you need to do is simply add your video files and press “Normalize”. In my case, I wanted to adjust the bit rates of the audio and do a little re-equalizing.

Equalizer

The program includes a level meter with fall-offs, so you can play your file and have a visual representation of the sound levels. The functionality is bit raw at the moment, but I’m sure in future versions this will be refined, and hopefully you will be able to adjust the fall-off times to make them stay at the peaks a little longer, as they seem to drop off a little to quickly.

MP4Gain Video Normalizer

Once I set my EQ levels and bit rates, I pressed “Normalize” and away it went!

MP4Gain ProgressMP4Gain processes the files very quickly, and once it is complete, all your video files are the same volume! Its VERY cool!

You can download the trial version of MP4Gain HERE. The trial is fully functional and allows you to process about 15-20 files before asking you to buy a license.

In summary, this program is great, and I’m hoping that future versions polish up a few minor issues, like a missing vertical scroll bar (program is difficult to use on a small screen as the Normalize button is right down the bottom, and off the screen), and the jerky level meter. The major killer of this program is the price. At $40, it is pretty expensive (In My Humble Opinion). If it was somewhere in the $15 – $20 range it would definitely be hard to pass up.

It is able to normalize volume levels in the following video file types:

  • mp4, flv, avi
  • mpeg, mpg
  • 3gp, wmv

MP4Gain can also normalize your audio music files. It can also normalize MP3, MP2, AAC, AC3, FLAC, OGG, WAV and M4A files to!