create yuv4mpeg filters
'yuv4mpeg' is a Perl module which provides access to the yuv4mpeg library, which is part of mjpegtools. The library provides functions for reading/writing stream and frame header information, as well as the frame data itself. Also, the Perl bindings have been augmented with some fast data-access methods to make it quick and easy to pull out the raw frame data in various forms. The module is meant to lets users create yuv4mpeg filters in Perl.
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