Ogle is a real DVD player that supports DVD menus and navigation. It can access CSS-protected DVDs if you have libdvdcss installed, take screen shots, and view movies in fullscreen mode. It handles angles correctly and automatically uses the correct aspect. You can switch subtitles and audio tracks. It runs on Linux, FreeBSD, NetBSD, OpenBSD, and Solaris.
NewVideoRecorder is a high quality video capture toolkit for Linux. It includes deep buffering of audio and video to reduce frame dropping, a smooth dropping algorithm to keep the video smooth if dropping is required, and dynamic stretching of the audio stream to exactly match the video stream. It can use v4l1 and v4l2 devices as video sources, and OSS devices as an audio source. It can produce QuickTime, AVI, NuppelVideo 0.52 files, MPEG-1 files, and all files supported by ffmpeg (through the ffmpeg library). It also includes tools and utilities for high quality video streaming (multicast and unicast).
XLV is a middle-level interface for Audio/Video (and generic multimedia format) playing, recording, and managing. The idea is that what you can do automatically (with one call) can also be done manually (all the decoding process can be extracted from the automate). XLV comes with a full bunch of plugins, including Vorbis, MPEG audio decoding, MPEG 1/2 video decoding, a Win32 codec interface, AVI decoder, Wave decoder, Quicktime decoder, MPEG/VOB (DVD file) decoder, and more functionalities like auto-format conversion, etc.
PythonTheater is a multimedia player capable of AVI/ASF/WMV/MPEG-1 and VCD playback. It can make use of the XVideo extension where available to provide fast playback and smooth scaling. It also supports features such as drag and drop from Nautilus, gmc, konqueror, rox, and others.