How to Merge Audio into Video File

1. Open audio files at first.
2. (Optional) Edit the audio data.
3. Click menu--<File>--<Merge into Video File> to merge the whole loaded audio data into video file. Click menu--<File>--<Merge Selection into Video File> to merge the selected audio data into video file.

<Source Video File>: Merge audio data with this file. (Optional)You can select the video piece to merge with audio data.
<Target Video File>: Generated new video file (The source video file will not be altered)

<Retain original audio of source video file>: The generated new video file will retain original audio and images of source video file.
<Remove original audio of source video file> The generated new video file will only retain images of source video file. (The source video file will not be altered)