FFmpeg filters: keep value in TS unit, move time-based values to `_time` #11623

Job	Run time
build_details	4s
build_details	4s
build_opam (4.14.x)	9m 7s
build_opam (4.14.x)	9m 7s
build_js	2m 18s
build_js	2m 18s
build_opam (5.2.x)	5m 32s
build_opam (5.2.x)	5m 32s
lezer_parse	55s
lezer_parse	55s
update_doc	11m 13s
update_doc	11m 13s
build_no_depopts	6m 20s
build_no_depopts	6m 20s
tree_sitter_parse	48s
tree_sitter_parse	48s
build_posix (debian_trixie, amd64)	13m 19s
build_posix (debian_trixie, amd64)	13m 19s
build_posix (debian_bookworm, amd64)	14m 21s
build_posix (debian_bookworm, amd64)	14m 21s
run_tests (@citest)	12m 32s
run_tests (@citest)	12m 58s
build_posix (ubuntu_oracular, amd64)	15m 23s
build_posix (ubuntu_oracular, amd64)	15m 23s
build_win32 (x64)	17m 50s
build_win32 (x64)	17m 50s
run_tests (@doctest)	7m 44s
run_tests (@doctest)	7m 44s
build_posix (ubuntu_noble, amd64)	14m 47s
build_posix (ubuntu_noble, amd64)	14m 47s
run_tests (@mediatest)	12m 28s
run_tests (@mediatest)	12m 28s
build_posix (alpine, amd64)	11m 49s
build_posix (alpine, amd64)	11m 49s
fetch_s3_artifacts	22s
fetch_s3_artifacts	22s
build_docker (amd64)	2m 19s
build_docker (amd64)	2m 19s
build_docker_alpine	0s
build_docker_alpine_minimal	0s
build_docker_minimal	0s
build_docker_release-minimal	0s
build_docker_release-minimal	0s
update_release	0s
update_release	0s
build_docker_release	0s
build_docker_release	0s
build_docker_minimal (amd64)	2m 13s
build_docker_alpine_minimal (amd64)	45s
build_docker_alpine (amd64)	48s
	5h 22m 34s

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