Video & Audio Muxer – Easily Merge Video and Audio Files
You can choose any video format from your local computer. In addition, it supports many other formats such as MPEG, 3GP, AAC, APNG, GIF, GEO, MKV, MOV, etc. The process is quite simple and intuitive. You just need to select the video file, press the button -> Mux -> Start, and then you will be able to download the resulting video file.
As for audio files, you can choose from many different formats such as WAV, AIFF, MP3, etc. You can also use the audio file to generate the video file with audio.