tests

Use ffmpeg 6.1.1 #1191

Job	Run time
package-wheel (macos-latest, arm64)	16m 29s
style	20s
package-source	29s
py-3.8 lib-6.1 ubuntu-latest	5m 19s
py-3.8 lib-6.0 ubuntu-latest	4m 25s
py-3.8 lib-5.1 ubuntu-latest	4m 5s
py-3.8 lib-5.0 ubuntu-latest	4m 4s
package-wheel (macos-latest, x86_64)	47m 11s
py-3.8 lib-6.1 windows-latest	4m 1s
py-pypy3.9 lib-6.1 ubuntu-latest	4m 19s
package-wheel (ubuntu-latest, aarch64)	3h 32m 28s
py-3.8 lib-6.0 windows-latest	3m 35s
py-3.8 lib-6.1 macos-latest	6m 3s
package-wheel (ubuntu-latest, i686)	22m 28s
py-3.8 lib-5.1 windows-latest	2m 55s
package-wheel (ubuntu-latest, x86_64)	21m 32s
py-3.8 lib-5.0 windows-latest	3m 10s
package-wheel (windows-latest, AMD64)	15m 50s
publish	48s
	6h 19m 31s

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