9cf66ae643
Old ffmpeg has a lot of vulnerabilities that have been fixed in newer versions, see https://www.cvedetails.com/vulnerability-list/vendor_id-3611/Ffmpeg.html.
SH4 optimizations have been removed in commit d6096a67422534918405abb46dafbbac4608cbc3 The last revission with the optimizations is cbfc9046e1c7e295b74f252902ae6f255eef4e78 If you want to maintain these (or other) SH4 optimizations in ffmpeg, then please contact ffmpeg-devel@ffmpeg.org