It is the only source filter that has proper variable framerate (VFR) support.It is the only source filter that has support for Unicode filenames that are not representable in the system codepage.In addition to being able to open almost any common audio or video format, the Avisynth plugin has a number of more or less unique properties that other Avisynth source filters lack:

This plugin is a part of the FFMS2 project and is available for download here for documentation see the Avisynth user guide. Avisynth and VapourSynth pluginįor the end user, the most visible use of FFMS is the implementation of both an Avisynth and a VapourSynth source plugin that uses the FFMS library to open media files. The official Windows builds are GPLv3 for this reason.įor more information on using the library, see the API documentation and the changelog. There are optional components that require a GPL FFmpeg, and if those are compiled in FFMS2 itself becomes covered by the GPL as well. The source is available under the MIT license, but the license of the binaries depends on how FFmpeg was compiled. The library is written in C++, but the public API is pure C, so if you can link to a C library, you can use FFMS2. It gives you an easy, convenient way to say 'open and decompress this media file for me, I don't care how you do it' and get frame- and sample-accurate access (usually), without having to bother with the sometimes less than straightforward and less than perfectly documented FFmpeg API. FFmpegSource (usually known as FFMS or FFMS2) is a cross-platform wrapper library around FFmpeg.

32 bit ffmpeg library download