iJoysoft MP4 to MP3 converter can convert MP4 to MP3 convert MPEG4 to MP3 and also extracts MP3 from many SD and HD videos like MP4 MPEG-1 MPEG-2 MPEG-4 WMV AVI 3GPP 3G2 MOV RM RMVB DV H.264/AVC video files. In addition this MP4 to MP3 Converter can convert MP3 from various audios files including WAV WMA AAC AC3 AIFF AIF CDA FLAC MPA and M4A. iJoysoft MP4 to MP3 converter can convert MP4 and other videos and audios to MP3 compatible with Zune iPod shuffle iPod nano iRiver PMP-100 Creative Zen Vision and portable MP4/MP3 players. 1. Choose all the files you plan to convert and conversion will be automatically completed one by one. 2. When converting MP4 to MP3 converter will auto detect dual core CPU type to give you the fastest conversion speeds. 3. Compress a large file to small size with the Bitrate Calculator or split large file into several segments to better fit your media players. 4. Set start time and duration to get the desired segment 5. Edit MP3 title author album genre composer year and other ID3 tag information to help you categorize your MP3s. 6. You have the option to run the program in background and then automatically execute the task complete actions. Power management CD decoding resizable player with adjustable aspect ratio (4:3 and 16:9) and pictures from camera as input are available.