The AVI player is a plug-in for XMMS, giving it the ability to play Windows AVI (including DivX ;-)) and ASF files on your Linux or FreeBSD box. You can simply add movies to your playlist and the plug-in will call aviplay to play the movie files. Many aviplay options are supported, such as fullscreen playback and true hardware acceleration on XFree86 4.x.x.
Avifile is a library that allows you to read and write compressed AVI files in most common video & audio formats (Indeo® Video, DivX, etc.) under x86 Linux. Compression and decompression are performed with Win32 DLLs. It includes a simple AVI player and a Video4Linux capture program. Currently it is under heavy development, and while some features (such as AVI playback) already work, some (audio compression) are not yet successfully implemented.
Avifile Glue for mpeg2_movie started as a simple patch against heroinewarrior mpeg2_movie to utilize libavifile, however the project got out of hand and currently supports the Nuppelvideo file format for input and the MJPEGtools' mpeg2enc YUV4MPEG format for output. Originally, this project's intent was not to become a new package, but only to provide direct AVI to MPEG conversion for the GNU/Unix/Linux community until the core feature (linking against libaviplay) was integrated into the main encoder, but this goal has been abandoned. The project's current goad is to enable as many encoders as possible with the ability to read AVI, NUV, and QT.
avtv is an SVGAlib/X11 program to capture and display TV or video input from all Accuview based TV/Video cards. This includes Reveal TV500, PBTV 4, Aztech TV/Video 500, and Comp Express TV/Video. It supports selecting input from TV tuner or external RCA connectors, capturing an image, and saving to a file.
bttvgrab is a program for grabbing video sequences using a bt848-based frame grabber card (e.g. Hauppauge WinTV, Miro PCTV...). The goal of bttvgrab is to provide high-quality grabbing suitable for video recording. Currently, this is accomplished by trying hard not to leave out a single frame, and to catch temproary delays by buffering several frames. In the future, synchronized sound will be part of it. Then you can create mpeg movies using mpeg2enc, the output files will be prepared for that, so that the conversion can be done by a simple shell script.