Fix some edge case issues in RKMPP #1088

Job	Run time
build_ubuntu / Build FFmpeg (focal, amd64)	1h 4m 49s
build_portable_linux / Build Portable FFmpeg (amd64)	1h 53m 7s
build_ubuntu / Build FFmpeg (focal, arm64)	15m 53s
build_debian / Build FFmpeg (bullseye, amd64)	56m 12s
build_portable_linux / Build Portable FFmpeg (arm64)	1h 42m 55s
build_ubuntu / Build FFmpeg (focal, armhf)	15m 35s
build_portable_mac / Build Portable FFmpeg (macos-13, x86_64)	50m 20s
build_ubuntu / Build FFmpeg (jammy, amd64)	58m 30s
build_debian / Build FFmpeg (bullseye, arm64)	15m 23s
build_portable_mac / Build Portable FFmpeg (macos-14, arm64)	21m 44s
build_portable_windows / Build Portable FFmpeg (win64)	38m 4s
build_ubuntu / Build FFmpeg (jammy, arm64)	16m 34s
build_debian / Build FFmpeg (bullseye, armhf)	13m 54s
build_ubuntu / Build FFmpeg (jammy, armhf)	14m 18s
build_debian / Build FFmpeg (bookworm, amd64)	1h 8m 9s
build_portable_windows_clang / Build Portable FFmpeg (CLANG64, win64)	1h 7m 54s
build_ubuntu / Build FFmpeg (noble, amd64)	1h 10m 31s
build_debian / Build FFmpeg (bookworm, arm64)	14m 48s
build_debian / Build FFmpeg (bookworm, armhf)	14m 8s
build_ubuntu / Build FFmpeg (noble, arm64)	16m 21s
build_ubuntu / Build FFmpeg (noble, armhf)	15m 10s
build_portable_windows / Publish Portable Release	0s
build_portable_mac / Publish Portable Release	0s
build_portable_windows_clang / Publish Portable Release	0s
build_debian / Publish Release	0s
build_ubuntu / Publish Release	0s
build_portable_linux / Publish Portable Release	0s
	14h 24m 19s

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