# How to make an audio volume envelope effect?

# Sample code

var audioFile = new AudioSource(file, segments, null);

streams.Add(new FFMPEGStream
{
                Filename = "c:\\samples\\!video.avi",
                ID = "v"
});

Add audio stream from mp3 file. The ID is set to "a" to add the audio stream. Must be "a" for audio files.

var envelope = new AudioVolumeEnvelopeEffect(70);

Add audio stream from another AVI file. The ID is set to "a" to add an audio stream from a video file.

streams.Add(new FFMPEGStream
{
                Filename = "c:\\samples\\!video2.avi",
                ID = "a"
});

VideoEdit1.Input_AddAudioFile(audioFile, TimeSpan.FromMilliseconds(0), 0, new []{ envelope });

Visit our GitHub page to get more code samples.