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| 02-03-08 / 15:32 : ScreenFlow : a revolution in screen capture (cjed) |
 ScreenFlow is a revolution in screen capture softwares area : it uses a proprietary compression algorithm (multithreaded, SSE and Altivec, 64 bits) that allow to simultaneously record multiple sources (screen, audio, iSight or DV cam, DVD from DVDPlayer, Keynote presentations), and then to edit them (as with iMovie) before exporting in QuickTime format.Only modified screen area are encoded, and the later editing allows to modify audio level, add zoom effects, shadows, reflection effects, hilight some areas (with circles for tutorials, zoom on cursor with sound, display of an overlay keyboard to display hitted keys), rearrange the pars. QuickTime export is optimized (through the GPU) in order to keep texts readable even when modifying the video resolution. It is available for Leopard only (uses Core Animation, QuickLook, Spotlight, QTKit, Quartz Composer, OpenGL, Core Data), and it requires a G4 with Quartz Extreme compatible graphic card (including Radeon 9000 Pro). A card supporting Core Image is required for some realtime effects (Radeon 9600 Pro min). The software is priced 100$. A demo is provided. |
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