The file you are referring to is actually a binary distribution that does not need to be compiled anymore. -- Lenz Grimmer ...
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ID Status▲ Resolution Sev Product Comp Assignee▲ Reporter Summary
51146 NEW --- nor Sisyphus gstreame aris savelevpa Невозможно воспроизвести видео формата H.264 в контейнере MP4 на устройствах с Nvidia при помощи Gstreamer.

File a new bug in the "gstreamer-vaapi" component of the "Sisyphus" product