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.
ffmpeg is a multiplatform, open-source library for video and audio files. I have compiled 19 useful and amazing commands covering almost all needs: video conversion, sound extraction, encoding file for iPod or PSP, and more.
Panda is not just a service for encoding your videos for the web; Panda handles the whole process. From the upload form to streaming, Panda takes control.
Panda run's completely in the cloud computing environment provided by Amazon's array of web services. The application runs on a customised EC2 instance with everything pre-installed, including FFmpeg and an plethora of codecs. SimpleDB is used to store all of data for video, encoding, accounts and encoding profiles. Uploaded and encoded video files are then stored on S3.
With StaxRip you can easily convert your DVD's, DVB captures and many more formats into MPEG-4 with codecs like x264, XviD and DivX. As a open source application StaxRip is completely free.