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.
MultiVideo is an image sequence viewer that is targeted to researchers in the image processing field. It features the ability to display several sequences simultaneously in multiple synchronized views, supports many sequence formats, (including formats without compression that are very useful for researchers), displays very long image sequences without loading them in memory, and runs on multiple platforms thanks to the wxWindows library.