error: extern block cannot be declared unsafe

issue:
rust-lang/rust-bindgen#3015
rust-lang/rust-bindgen#2901

error[E0433]: failed to resolve: could not find `offset_of` in mem
issue:
rust-lang/rust-bindgen#2960

Use unsafe extern instead of extern in blocks for any Rust target after 1.82

.github/workflows/build.yml

@@ -201,8 +201,8 @@ jobs:
           echo "PKG_CONFIG_PATH=$PWD/ffmpeg-libs/lib/amd64/pkgconfig" >> "$GITHUB_ENV"
           echo "LD_LIBRARY_PATH=$PWD/ffmpeg-libs" >> "$GITHUB_ENV"
       # rust-version from Cargo.toml
-      - name: Install Rust 1.70.0
-        uses: dtolnay/rust-toolchain@1.70.0
+      - name: Install Rust 1.82.0
+        uses: dtolnay/rust-toolchain@1.82.0
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: "v2-rust"

Cargo.toml

@@ -16,7 +16,7 @@ categories = ["multimedia"]
 include = ["LICENSE", "build.rs", "src/"]
 
 # When changing MSRV: Also update build.yml and README.md
-rust-version = "1.70.0"
+rust-version = "1.82.0"
 
 [dependencies]
 libc = "0.2"

README.md

@@ -27,7 +27,7 @@ If you have significant, demonstrable experience in Rust and multimedia-related
 
 ## Minimum supported Rust version (MSRV)
 
-Both `ffmpeg-the-third` and `ffmpeg-sys-the-third` currently require a Rust version of 1.70.0 or higher. Increases in MSRV will result in a semver MINOR version increase.
+Both `ffmpeg-the-third` and `ffmpeg-sys-the-third` currently require a Rust version of 1.82.0 or higher. Increases in MSRV will result in a semver MINOR version increase.
 
 If you are having issues compiling this crate on your version of Rust, there are two tools you can use to help find MSRV-compatible dependency versions:
 

ffmpeg-sys-third/Cargo.toml

@@ -19,7 +19,7 @@ keywords = ["audio", "video"]
 categories = ["multimedia", "external-ffi-bindings"]
 
 # When changing MSRV: Also update build.yml and README.md
-rust-version = "1.70.0"
+rust-version = "1.82.0"
 
 [lib]
 # Disable doctests as a workaround for https://github.com/rust-lang/rust-bindgen/issues/1313