diff --git a/.gitignore b/.gitignore
index 7c61fcff1..7b8ac41c9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -104,4 +104,4 @@ AGENTS.md
 .codex
 operations-log.md
 verification.md
-act
\ No newline at end of file
+act
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4de9d9b9a..5712a3cd6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -210,6 +210,33 @@ list(APPEND OLIVE_LIBRARIES
   FFMPEG::swresample
 )
 
+# Detect FFmpeg pixel formats that may not exist in all versions
+include(CheckCXXSourceCompiles)
+set(CMAKE_REQUIRED_INCLUDES ${FFMPEG_INCLUDE_DIRS})
+check_cxx_source_compiles("
+#include <libavutil/pixfmt.h>
+int main() { AVPixelFormat f = AV_PIX_FMT_GRAYF16; (void)f; return 0; }
+" HAVE_AV_PIX_FMT_GRAYF16)
+check_cxx_source_compiles("
+#include <libavutil/pixfmt.h>
+int main() { AVPixelFormat f = AV_PIX_FMT_RGBF16; (void)f; return 0; }
+" HAVE_AV_PIX_FMT_RGBF16)
+check_cxx_source_compiles("
+#include <libavutil/pixfmt.h>
+int main() { AVPixelFormat f = AV_PIX_FMT_RGBAF16; (void)f; return 0; }
+" HAVE_AV_PIX_FMT_RGBAF16)
+unset(CMAKE_REQUIRED_INCLUDES)
+
+if(HAVE_AV_PIX_FMT_GRAYF16)
+  add_compile_definitions(HAVE_AV_PIX_FMT_GRAYF16)
+endif()
+if(HAVE_AV_PIX_FMT_RGBF16)
+  add_compile_definitions(HAVE_AV_PIX_FMT_RGBF16)
+endif()
+if(HAVE_AV_PIX_FMT_RGBAF16)
+  add_compile_definitions(HAVE_AV_PIX_FMT_RGBAF16)
+endif()
+
 # Static FFmpeg (e.g. our Linux CI build) needs system libs for libavcodec/libavformat.
 find_package(ZLIB REQUIRED)
 list(APPEND OLIVE_LIBRARIES ZLIB::ZLIB)
diff --git a/act b/act
deleted file mode 100755
index d23696743..000000000
Binary files a/act and /dev/null differ
diff --git a/app/common/ffmpegutils.cpp b/app/common/ffmpegutils.cpp
index c693ee712..cd6427896 100644
--- a/app/common/ffmpegutils.cpp
+++ b/app/common/ffmpegutils.cpp
@@ -170,7 +170,11 @@ AVPixelFormat FFmpegUtils::GetFFmpegPixelFormat(const PixelFormat &pix_fmt,
 		case PixelFormat::U16:
 			return AV_PIX_FMT_RGB48;
 		case PixelFormat::F16:
+#ifdef HAVE_AV_PIX_FMT_RGBF16
 			return AV_PIX_FMT_RGBF16;
+#else
+			return AV_PIX_FMT_RGB48;
+#endif
 		case PixelFormat::F32:
 			return AV_PIX_FMT_RGBF32;
 		case PixelFormat::INVALID:
@@ -184,7 +188,11 @@ AVPixelFormat FFmpegUtils::GetFFmpegPixelFormat(const PixelFormat &pix_fmt,
 		case PixelFormat::U16:
 			return AV_PIX_FMT_RGBA64;
 		case PixelFormat::F16:
+#ifdef HAVE_AV_PIX_FMT_RGBAF16
 			return AV_PIX_FMT_RGBAF16;
+#else
+			return AV_PIX_FMT_RGBA64;
+#endif
 		case PixelFormat::F32:
 			return AV_PIX_FMT_RGBAF32;
 		case PixelFormat::INVALID:
diff --git a/app/render/plugin/pluginrenderer.cpp b/app/render/plugin/pluginrenderer.cpp
index 5994317b9..311666ba7 100644
--- a/app/render/plugin/pluginrenderer.cpp
+++ b/app/render/plugin/pluginrenderer.cpp
@@ -93,7 +93,11 @@ static AVPixelFormat GetOfxAVPixelFormat(const OFX::Host::ImageEffect::Image &im
 		} else if (pixel_format == olive::core::PixelFormat::U16) {
 			pix_fmt = AV_PIX_FMT_GRAY16LE;
 		} else if (pixel_format == olive::core::PixelFormat::F16) {
+#ifdef HAVE_AV_PIX_FMT_GRAYF16
 			pix_fmt = AV_PIX_FMT_GRAYF16;
+#else
+			pix_fmt = AV_PIX_FMT_GRAY16LE;
+#endif
 		} else if (pixel_format == olive::core::PixelFormat::F32) {
 			pix_fmt = AV_PIX_FMT_GRAYF32;
 		}
@@ -871,7 +875,11 @@ static AVPixelFormat GetDestinationAVPixelFormat(const olive::VideoParams &param
 		} else if (params.format() == olive::core::PixelFormat::U16) {
 			pix_fmt = AV_PIX_FMT_GRAY16LE;
 		} else if (params.format() == olive::core::PixelFormat::F16) {
+#ifdef HAVE_AV_PIX_FMT_GRAYF16
 			pix_fmt = AV_PIX_FMT_GRAYF16;
+#else
+			pix_fmt = AV_PIX_FMT_GRAY16LE;
+#endif
 		} else if (params.format() == olive::core::PixelFormat::F32) {
 			pix_fmt = AV_PIX_FMT_GRAYF32;
 		}
diff --git a/tests/gtest/plugin_ofx_integration_test.cpp b/tests/gtest/plugin_ofx_integration_test.cpp
index 5585de241..9951225f1 100644
--- a/tests/gtest/plugin_ofx_integration_test.cpp
+++ b/tests/gtest/plugin_ofx_integration_test.cpp
@@ -65,7 +65,12 @@ TEST(PluginIntegration, ChromaKeyerCreateAndRender)
 		}
 	}
 
-	olive::plugin::loadPlugins(QString::fromUtf8(path));
+	QString raw = QString::fromUtf8(path);
+	const QChar separator = QDir::listSeparator();
+	const QStringList paths = raw.split(separator, Qt::SkipEmptyParts);
+	for (const QString &p : paths) {
+		olive::plugin::loadPlugins(p);
+	}
 
 	auto *cache = OFX::Host::PluginCache::getPluginCache();
 	OFX::Host::Plugin *found = nullptr;
diff --git a/tests/gtest/plugin_ofx_misc_test.cpp b/tests/gtest/plugin_ofx_misc_test.cpp
index c08ae5e1c..89741e4fa 100644
--- a/tests/gtest/plugin_ofx_misc_test.cpp
+++ b/tests/gtest/plugin_ofx_misc_test.cpp
@@ -215,7 +215,12 @@ bool ShouldSkipTest() {
 	
 	static bool plugins_loaded = false;
 	if (!plugins_loaded) {
-		loadPlugins(QString::fromUtf8(path));
+		QString raw = QString::fromUtf8(path);
+		const QChar separator = QDir::listSeparator();
+		const QStringList paths = raw.split(separator, Qt::SkipEmptyParts);
+		for (const QString &p : paths) {
+			loadPlugins(p);
+		}
 		plugins_loaded = true;
 	}