Is it possible to view the audio waveform of mp4

Question

I have been searching all over for a way to display the audio intensity of an mp4 file. I have found many guides on how to do it with wav files and even audio being actively recorded, but I can't find anything about mp4s.

I have a C# windows form that plays a video and allows you to caption it. What I am trying to do next is add a visual representation of the audio intensity so the user can see where the next chunk of speech is. To play the video I am using Windows Media Player

Answer 1

You can refer to this other stackoverflow question: Howplay mp4 songs using NAudio Instead of playing the file you can show the current level with some widget. Just pay attention to the fact that you should probably display the level in dB:

dB = 20 * log10(amplitude/maxAmplitude)