add audio to video

Convert video and audio to iPhone

Convert all video to iPhone MP4/MP3/M4A, or convert audio to iPhone music files.

Convert nearly all popular video/audio formats between each other.

Convert almost all video/audio to iPod touch MPEG-4/MP4 and music MP3, M4A, etc.

It can convert MKV files to most popular video/audio formats with a few steps..

converts among all popular video and audio formats.

Convert most of video between almost any formats and audio.

Convert all popular video and audio for apple iPhone MP4,MOV,AAC and M4A.

Convert video and audio to Zune mp4/mp3

Convert any video and audio formats to Archos MP4, WMV, MP3, WMA, WAV, etc.