AstroAviBrowser is a small tool for astronomy imaging capture/processing. It allows you to open a video file, select the good frames, and save the new sequence in a new avi file using raw or lossless codecs. You may also de-bayer your frames and separate RGB plans. It's a kind of "AviRaw" for Linux.
FF Multi Converter is a simple graphical application that converts audio, video, image, and document files between all popular formats, using and combining other programs. It uses ffmpeg for audio/video files, unoconv for document files, and the ImageMagick library for image file conversions.
FFmpegPHP is a pure OO PHP port of the ffmpeg-php wrapper. It adds an easy to use, object-oriented API for accessing and retrieving information from video and audio files. It has methods for returning frames from movie files as images that can be manipulated using PHP's image functions. This works well for automatically creating thumbnail images from movies. It is also useful for reporting the duration and bitrate of audio files (MP3, WMA, etc.). It can access many of the video formats supported by ffmpeg, including MOV, AVI, MPG, and WMV.
Sinthgunt is a graphical user interface for ffmpeg, a program that can convert digital audio and video into numerous formats. It is easy to use, and has more than 100 pre-configured conversion settings. It automatically detects which presets are supported by your version of ffmpeg. It is easy to extend, since the conversion settings are stored in an XML file.