Extract wav file from video file

Question

I am developing an application in which I need to extract the audio from a video. The audio needs to be extracted in .wav format but I do not have a problem with the video format. Any format will do, as long as I can extract the audio in a wav file.

Currently I am using Windows Media Player COM control in a windows form to play the videos, but any other embedded player will do as well.

Any suggestions on how to do this? Thanks

Answer 1

If you want to do this with C#, take a look at NAudio library. It can analyze the audio format (like FFMpeg) and also provide the audio stream. Here's one example.

Snippet from the sample:

using NAudio.Wave;
using System.IO;

...

// contentAsByteArray consists of video bytes
MemoryStream contentAsMemoryStream = new MemoryStream(contentAsByteArray);

using (WaveStream pcmStream =
    WaveFormatConversionStream.CreatePcmStream(
        new StreamMediaFoundationReader(contentAsMemoryStream)))
{
    WaveStream blockAlignReductionStream = new BlockAlignReductionStream(pcmStream);

    // Do something with the wave stream
}

Answer 2

Here is a link on how to extract audio using GraphEdit, GraphEdit is an front end UI for the DirectShow API so everything it can do you can do with API.
You can use the DirectShow.NET liberty which wraps the DirectShow API for the managed world.