Make ffmpeg directory path absolute #3250

Job	Run time
generate-matrix / generate	7s
Build and Upload wheel / build-manywheel-py3_10-cuda13_0	19m 20s
Build and Upload wheel / build-manywheel-py3_10-cuda12_6	20m 20s
Build and Upload wheel / build-manywheel-py3_10-cuda12_9	21m 16s
Build and Upload wheel / build-manywheel-py3_10-cuda12_8	20m 44s
Build and Upload wheel / upload / upload-manywheel-py3_10-cuda12_6	23s
Build and Upload wheel / upload / upload-manywheel-py3_10-cuda13_0	21s
Build and Upload wheel / upload / upload-manywheel-py3_10-cuda12_9	17s
Build and Upload wheel / upload / upload-manywheel-py3_10-cuda12_8	22s
build-docs	18m 51s
install-and-test (3.10, 12.6, 6)	31m 27s
install-and-test (3.10, 12.6, 8.0)	23m 23s
install-and-test (3.10, 13.0, 6)	30m 37s
install-and-test (3.10, 12.6, 7)	34m 54s
install-and-test (3.10, 12.6, 4.4.2)	13m 26s
install-and-test (3.10, 13.0, 8.0)	22m 26s
install-and-test (3.10, 13.0, 4.4.2)	12m 39s
install-and-test (3.10, 13.0, 7)	34m 22s
	5h 5m 15s

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