Android Media Converter. Media Converter is a robust Android application build on top of FFmpeg with clean UI. As it name, user can convert media file to other encoding format easily with preset commands. The app also can be extended, by allowing user to create their own command. Build app As @JohnSmith and a few other pointed out in the comments, this does not encode the audio in MP3 format and there is no in-built MP3 encoder on Android. The reason this solution seems to work is that MediaPlayer recognizes the encoding as AAC before beginning the track (regardless of the file extension). Add audio and image to see amazing results. "Mp3 to Mp4 converter" app is an innovative audio visualizer that turns audio into video files. Select any mp3 or group of files to convert them into video files adorn with your images. This audio converter helps to save your memorial pictures with your favorite songs and music. The following are some of the latest Android MP4 to MP3 converter applications: 1. iMyFone Filme Lite. Filme Lite is a fantastic app for converting MP4 videos to MP3 audio files in an easy and enjoyable manner. For Android smartphones, the app is available for free download from the Playstore. It doesn't take up any space on your phone or computer. Download audio tracks, playlists and channels to your phone with the Android downloader app. Save content in a variety of formats from multiple sites, just like with the desktop version. File Export and Import Video Transcoder is an application which uses the open source program FFmpeg to transcode video files from one format to another. By selecting the video to process, details for the video are provided and the desired settings can be configured. The following media containers are supported: Avi, Flv, Gif, Matroska, Mp3, Mp4, Ogg, Opus, WebM. A free web app that converts video files, allowing you to change the video format, resolution or size right in your browser. Upload files of up to 4 GB You can upload files up to 4 GB in size. The Best MP4 to MP3 Converter App for Android (News - Alert) & iOS. 9.Video to MP3 Converter. As the name suggests, the audio converter app allows you to extract high-quality audio from your video files and convert MP4 to MP3 on Android devices. ixXu.