update ffmpeg path

Author: debugly

.github/workflows/generate-test-videos.sh

@@ -26,13 +26,8 @@ HOST_ARCH=$(uname -m)
 
 # Candidates order of preference
 CANDIDATES=(
-    "build/product/macos/bin/ffmpeg"
-    "build/product/macos/ffmpeg8-bin-${HOST_ARCH}/bin/ffmpeg"
-    "build/product/macos/ffmpeg8-bin-arm64/bin/ffmpeg"
-    "build/product/macos/ffmpeg8-bin-x86_64/bin/ffmpeg"
-    "product/macos/universal/bin/ffmpeg-macos-${HOST_ARCH}"
-    "product/macos/universal/bin/ffmpeg-macos-arm64"
-    "product/macos/universal/bin/ffmpeg-macos-x86_64"
+    "build/product/macos/universal/ffmpeg/bin/ffmpeg-macos-${HOST_ARCH}"
+    "build/product/macos/universal/ffmpeg/bin/ffmpeg-macos-arm64"
 )
 
 for path in "${CANDIDATES[@]}"; do