diff --git a/.github/actions/build/action.yml b/.github/actions/build/action.yml
index 40d74eb..bcc9542 100644
--- a/.github/actions/build/action.yml
+++ b/.github/actions/build/action.yml
@@ -7,6 +7,8 @@ inputs:
   tests:
     description: Unit tests.
     default: false
+  ffmpeg-path:
+    description: Path to ffmpeg
   platform:
     description: Target platform.
     required: false
@@ -29,8 +31,9 @@ runs:
           SCONSFLAGS: ${{ inputs.sconsflags }}
           SCONS_CACHE: ${{ inputs.scons-cache }}
           SCONS_CACHE_LIMIT: ${{ inputs.scons-cache-limit }}
+          FFMPEG_PATH: ${{ inputs.ffmpeg-path }}
       run: |
         cd gdextension_build
-        echo "Building with flags:" platform=${{ inputs.platform }} target=${{ inputs.target }} ${{ env.SCONSFLAGS }}
-        scons platform=${{ inputs.platform }} target=${{ inputs.target }} ${{ env.SCONSFLAGS }}
+        echo "Building with flags:" platform=${{ inputs.platform }} target=${{ inputs.target }} ffmpeg_path=${{ env.FFMPEG_PATH }} ${{ env.SCONSFLAGS }}
+        scons platform=${{ inputs.platform }} target=${{ inputs.target }} ffmpeg_path=${{ env.FFMPEG_PATH }} ${{ env.SCONSFLAGS }}
         ls -l build/addons/ffmpeg/
diff --git a/.github/workflows/linux_builds.yml b/.github/workflows/linux_builds.yml
index a3b8544..6b0238b 100644
--- a/.github/workflows/linux_builds.yml
+++ b/.github/workflows/linux_builds.yml
@@ -35,6 +35,11 @@ jobs:
         with:
           submodules: recursive
 
+      - name: Download ffmpeg
+        run: |
+          wget https://github.com/EIRTeam/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-linux64-lgpl-godot.tar.xz
+          tar xvf ffmpeg-master-latest-linux64-lgpl-godot.tar.xz
+
       - name: Setup python and scons
         uses: ./.github/actions/deps
 
@@ -42,6 +47,7 @@ jobs:
         uses: ./.github/actions/build
         with:
           sconsflags: ${{ env.SCONSFLAGS }} ${{ matrix.sconsflags }}
+          ffmpeg-path: "../ffmpeg-master-latest-linux64-lgpl-godot/"
           platform: linux
           target: ${{ matrix.target }}
           tests: ${{ matrix.tests }}
diff --git a/.github/workflows/windows_builds.yml b/.github/workflows/windows_builds.yml
index b38cd03..f5b70d3 100644
--- a/.github/workflows/windows_builds.yml
+++ b/.github/workflows/windows_builds.yml
@@ -42,10 +42,24 @@ jobs:
       - name: Setup MSVC problem matcher
         uses: ammaraskar/msvc-problem-matcher@master
 
+      - uses: suisei-cn/actions-download-file@v1
+        id: downloadfile
+        name: Download the file
+        with:
+          url: "https://github.com/EIRTeam/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-win64-lgpl-godot.tar.xz"
+          target: .
+
+      - name: Extract tgz
+        uses: ihiroky/extract-action@v1
+        with:
+          file_path: ffmpeg-master-latest-win64-lgpl-godot.tar.xz
+          extract_dir: .
+
       - name: Compilation
         uses: ./.github/actions/build
         with:
           sconsflags: ${{ env.SCONSFLAGS }} ${{ matrix.sconsflags }}
+          ffmpeg-path: "../ffmpeg-master-latest-win64-lgpl-godot/"
           platform: windows
           target: ${{ matrix.target }}
           tests: ${{ matrix.tests }}
diff --git a/gdextension_build/SConstruct b/gdextension_build/SConstruct
index 351b115..b333321 100644
--- a/gdextension_build/SConstruct
+++ b/gdextension_build/SConstruct
@@ -55,9 +55,13 @@ else:
 
 opts = Variables([], ARGUMENTS)
 opts.Add(BoolVariable("verbose", "Enable verbose output for the compilation", False))
+opts.Add(("ffmpeg_path", "Path to FFmpeg", ""))
 
 opts.Update(env)
 
+if not "ffmpeg_path" in env or not env["ffmpeg_path"]:
+    raise RuntimeError("ffmpeg path not found")
+
 if not env["verbose"]:
     methods.no_verbose(sys, env)
 
@@ -65,12 +69,13 @@ env.Append(CPPDEFINES=["GDEXTENSION"])
 env.Append(CPPPATH=["../"])
 sources = Glob("../*.cpp")
 sources.extend(Glob("*.cpp"))
+ffmpeg_path = env["ffmpeg_path"]
 
-env.Prepend(CPPPATH="../thirdparty/ffmpeg/include")
-env.Append(LIBPATH="../thirdparty/ffmpeg/lib")
 ffmpeg_libs = ["avcodec", "avfilter", "avformat", "avutil", "swresample", "swscale"]
 
 env.Append(LIBS=ffmpeg_libs)
+env.Prepend(CPPPATH=f"{ffmpeg_path}/include")
+env.Append(LIBPATH=[f"{ffmpeg_path}/lib"])
 
 if env["platform"] == "windows" and sys.platform == "win32" and not env.get("is_msvc", False):
     # Workaround for https://github.com/godotengine/godot-cpp/issues/1064
@@ -100,13 +105,9 @@ else:
         source=sources,
     )
 
-FFMPEG_DUMMY = "../thirdparty/ffmpeg/LICENSE.txt"
-ffmpeg_download_action = ffmpeg_download.ffmpeg_download_builder(env, FFMPEG_DUMMY, "ffmpeg_download.py")
-ffmpeg_install_action = ffmpeg_download.ffmpeg_install(env, f"#{addon_platform_dir}", "../thirdparty/ffmpeg")
+ffmpeg_install_action = ffmpeg_download.ffmpeg_install(env, f"#{addon_platform_dir}", ffmpeg_path)
 env.Depends(sources, env.Install(addon_base_dir, "ffmpeg.gdextension"))
-license_install_action = env.InstallAs(f"{addon_base_dir}LICENSE-ffmpeg.txt", FFMPEG_DUMMY)
 env.Depends(sources, ffmpeg_install_action)
-env.Depends(sources, license_install_action)
 
 env.GLSL_HEADER("../yuv_to_rgb.glsl")
 env.Depends(Glob("../*.glsl.gen.h"), ["#glsl_builders.py"])
diff --git a/gdextension_build/command_queue_mt.cpp b/gdextension_build/command_queue_mt.cpp
index 4d4cff1..d3770e4 100644
--- a/gdextension_build/command_queue_mt.cpp
+++ b/gdextension_build/command_queue_mt.cpp
@@ -71,10 +71,8 @@ CommandQueueMT::SyncSemaphore *CommandQueueMT::_alloc_sync_sem() {
 	return &sync_sems[idx];
 }
 
-CommandQueueMT::CommandQueueMT(bool p_sync) {
-	if (p_sync) {
-		sync = memnew(Semaphore);
-	}
+CommandQueueMT::CommandQueueMT() {
+	sync = memnew(Semaphore);
 }
 
 CommandQueueMT::~CommandQueueMT() {
diff --git a/gdextension_build/command_queue_mt.h b/gdextension_build/command_queue_mt.h
index 4c4f77c..f4f1260 100644
--- a/gdextension_build/command_queue_mt.h
+++ b/gdextension_build/command_queue_mt.h
@@ -28,8 +28,8 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef ET_COMMAND_QUEUE_MT_H
-#define ET_COMMAND_QUEUE_MT_H
+#ifndef COMMAND_QUEUE_MT_H
+#define COMMAND_QUEUE_MT_H
 
 #ifdef GDEXTENSION
 
@@ -418,7 +418,7 @@ class CommandQueueMT {
 		_flush();
 	}
 
-	CommandQueueMT(bool p_sync);
+	CommandQueueMT();
 	~CommandQueueMT();
 };
 
@@ -440,4 +440,4 @@ class CommandQueueMT {
 
 #endif
 
-#endif // ET_COMMAND_QUEUE_MT_H
+#endif // COMMAND_QUEUE_MT_H