AVT also known as Audio Video Tools is all in one app for Compress Merge Join Trim VIDEO and AUDIO files. Video formats like. Mp4. Wmv. Divx. M4v mpg 3gp mp4v mpg4 movie m4u flv mjpeg mkv mts webm can be compressed to mp4 format. Audio formats like mp3 mp4 acc ogg wav 3gp m4a flac can be converted to mp3 format. Audio utilities included in this app.