Make old ffmpeg version a hard error #14475

Job	Run time
cpp-paths-filter	6s
docs-paths-filter	2s
python-paths-filter	5s
rust-paths-filter	4s
web-paths-filter	4s
Checks / Rerun lints	25s
Checks / Check if running codegen would produce any changes	52s
Checks / Lint markdown	18s
Checks / Misc formatting	21s
Checks / Spell Check	7s
Checks / markdown-paths-filter	4s
Update PR Body / Update PR body	26s
Deploy Landing Preview	0s
Python Checks	0s
Checks / Check links	0s
Minimum CLI Build / Set Config (linux-x64)	2s
C++ tests	0s
Rust Checks / Rust lints (fmt, check, clippy, tests, doc)	1m 0s
Rust Checks / Test on macOS and Windows	0s
Build rerun_js / Build rerun_js	47s
Build web viewer / Build web viewer	1m 0s
Minimum CLI Build / Build rerun-cli (ubuntu-latest-16-cores)	41s
Minimum Wheel Build	0s
Minimum Wheel Test	0s
Upload Web	0s
Save PR Summary	0s
	6m 24s

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