Add IDR refresh to encoder. #463

Job	Run time
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=GLFW	23m 41s
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=libretro	24m 6s
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=KHR_DISPLAY	24m 35s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=GLFW	27m 12s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=libretro	22m 16s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=KHR_DISPLAY	25m 51s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=GLFW	22m 23s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=libretro	29m 1s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=KHR_DISPLAY	21m 36s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=GLFW	21m 0s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=libretro	21m 3s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=KHR_DISPLAY	21m 36s
	4h 44m 20s

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