A video usually consists of a video channel an an audio channel, if your intention is to "remove" the video channel and leave the audio channel (Example: converting a video into MP3), You should use a format conversion software. The best free format conversion software is Format Factory (see the related link)
One of it's many features is "All to MP3/WMA/AMR/OGG/AAC/WAV."
In other words, it can convert anything to audio.
I recommend using the "All to MP3" option for best results.
MP3- audio MP4- audio and video MP5- audio, video
In AVS Video Editor, you can extract the audio.
To change the audio in the Audio/Music track, simply delete it and put something else in its place. To change the audio of a video in the video track, first Mute the audio of the video. Then place alternate audio in the Audio/Music track.
There is only one audio track to work with in Windows Movie Maker. The only other audio track is connected to the Video Track (the video's audio).Therefore, you can only have one video (with audio) in the Video Track and one audio/music insertion in the Music/Audio Track.
Video is Audio's partner.
Power Video to Audio Converter
No thats just for converting Audio not Video
You can't run the video's audio while video is paused. But, if you want to hear the video's audio without the distraction of the video, click the + button beside the Video track in the time-line view. Then, click, hold and drag the Audio track down into the Audio/Music track below.Close up the Video track. Then delete the video (or Remove it). The only thing remaining should be the original video's audio in the Audio/Music track. If you want the video back in the project, drag it back down into the Video track.
Audio-visual is a video having video as well as audio. Movies are example of some audio visual technology.
It can be video, audio but mainly its video and audio together. Found on Wikipedia
The way to remove the video from the audio (and only retain the audio) is by dragging the video clip to the MUSIC/AUDIOtrack in the Time-line view of Windows Movie Maker instead of the Video track.Once you have the audio there, publish/finish it. That will change the video to an 'audio' format (in this case a .wma).
There are many different types of audio and video capture devices, such as camcorders. Many phones, such as the iPhone, have audio and video features.