MediaCoder is a free universal batch media transcoder, which nicely integrates most popular audio/video codecs and tools into an all-in-one solution. With a flexible and extendable architecture, new codecs and tools are added in constantly as well as supports for new devices. MediaCoder intends to be the swiss army knife for media transcoding in all time and at this moment, it already has millions of users from 170+ countries all over the planet.
MediaCoder is a front-end/GUI for a collection of audio/video command line utilities and dynamic libraries (including audio/video codecs and multiplexers). MediaCoder maintains a unified parameter tree whose leaves (parameter values) can be altered through the application GUI, a web-based tree view, user interfaces for specific devices (e.g. PSP, iPhone) and conforming HTTP requests. It maps the parameter tree into command line options or calling parameters for various codecs and tools. MediaCoder pipes the decoder's output into the encoder's input, rather than using temporary files. This allows it to convert large amounts of data without using excessive disk space. Some of the included utilities are also patched to add extra interfaces.

Joboshare Video Converter is easy-to-use, powerful video and audio converting software, which can convert between all popular video and audio formats. It provides rich profiles for popular multimedia devices such as iPod, iPhone, mobile phone, windows mobile, portable multimedia device etc., enables you to convert audio and video to their respective formats supported. Joboshare video Converter supports to adjust parameters of audio/video codec and the ID3 editing function of audio formats such as WMA and MP3. With it, you can also extract and convert the audio from a video file, to recopy a music CD.