Swivel is a free, open-source desktop application that converts  Adobe Flash SWF files into standard video formats through direct rendering rather than capture. It processes Flash timelines frame by frame, translating vector animation data into rasterized multimedia output at custom-defined resolutions. The software handles embedded audio independently of playback and interprets scripted animation logic during export.

Swivel supports both scripted and timeline-driven Flash projects, including complex camera motion and layered visual effects. Output settings allow precise control over resolution scaling, frame rate, and audio handling while preserving the integrity and structure of the original SWF file throughout the conversion process.

Frame-perfect vector output

Swivel performs Frame-Perfect Rendering by executing the Flash file internally and exporting each frame as rendered data rather than recording playback. This method preserves animation timing, scripted motion, and transitional frames without relying on real-time execution. Frame generation follows the SWF timeline precisely, including nested symbols and scripted frame control. The rendering pass produces a deterministic frame sequence suitable for direct video encoding.

Because Flash content is vector-based, it applies Vector Scaling during export to raster video resolutions. Shapes, paths, and text are recalculated mathematically for the target frame size rather than enlarged from pixels. This scaling process allows low-resolution source animations to be rendered at high-definition or ultra-high-definition dimensions while preserving line edges, gradients, and motion paths defined in the original file. However, it lacks an editable project export feature.

Audio handling relies on Direct Audio Extraction from embedded Flash sound data. Instead of capturing system playback, the software decodes sound streams directly from the SWF structure. This approach preserves original channel separation, timing alignment, and sample data. Audio is synchronized to the rendered frame sequence during encoding, avoiding drift caused by playback timing differences or dropped visual frames.

Scripted motion control

Swivel includes tools for scripted playback, resolution control, and synchronized audio export within a single rendering workflow. It supports ActionScript-based timelines and camera motion while converting vector animation into raster video formats. The software does not function as a general Flash runtime replacement and does not export editable project data. Interactive logic is limited to predefined playback paths during rendering rather than full interaction capture.