fix(ci): Resolve FFmpeg 6.1 pointer mutability and MSYS2 gcc include headers

.github/workflows/release.yml

@@ -118,10 +118,10 @@ jobs:
 
       - name: Build Release Binaries (Windows)
         shell: msys2 {0}
-        env:
-          LIBCLANG_PATH: /mingw64/bin
-          BINDGEN_EXTRA_CLANG_ARGS: "-I/mingw64/include"
         run: |
+          GCC_INC="$(gcc -print-file-name=include)"
+          export LIBCLANG_PATH="/mingw64/bin"
+          export BINDGEN_EXTRA_CLANG_ARGS="-I${GCC_INC} -I/mingw64/include"
           cargo build --release
 
       - name: Package Windows Zip

src/encoder.rs

@@ -584,7 +584,7 @@ impl AudioEncoder {
                 self.swr_ctx,
                 (*out_frame).data.as_mut_ptr(),
                 nb_samples,
-                (*in_frame).data.as_ptr() as *const *const u8,
+                (*in_frame).data.as_ptr() as *mut _,
                 nb_samples
             );