Avformat-lav-57.dll file is part of FFmpeg container format library product developed by FFmpeg. It is responsible for FFmpeg Project functionality. This part is required for FFmpeg container format library to function. If you are planning on replacing avformat-lav-57.dll with a new version make sure that you backup your old file. Replacing avformat-lav-57.dll file with a diffent version can cause FFmpeg container format library to malfunction.
|Dll file name
|FFmpeg container format library
|Program Files MPC-HC LAVFilters64