Batch MP3 Video Converter, made in Japan, focuses on converting a bunch of video/audio files in a row. Background process provides you with sequential auto conversion while you are sleeping. You can convert video formats, resize video resolution and extract audio from video. Let's get MP4 video and MP3 audio files that are one of the best types for smartphones. 【recommended for those who wants to ...】 ・change video/audio types automatically and sequentially because of having a bunch of files. (codec conversion, format conversion) ・convert high resolution (high definition: HD) video files for PC into the ones for smartphones to save storage space or get quick response. (Changing resolution) ・extract audio from video in a row for playing on your favorite music players. ・find smartphone video converter to get MP4 video files. (FLV conversion, WMV conversion, AVI conversion) 【features】 Batch MP3 Video Converter ... ・can convert many video files into MP4 video files for smartphone in a row. (A recommended resolution and 2 other resolutions can be chosen.) ・can extract MP3 audio files from a bunch of video files in a row. ・can convert a lot of audio files into MP4 video files in a row. ・can convert a large number of audio files into MP3 audio files for smartphone in a row.