Configure CI workflows to use appropriate FFmpeg versions

- Linux CI: Uses FFmpeg 6 (via ffmpeg6 feature flag)
- Windows CI: Uses FFmpeg 7 (via ffmpeg7 feature flag)
- macOS: Uses FFmpeg 8 (default, via ffmpeg8 feature flag)
- Updated build scripts to accept FFMPEG_VERSION environment variable
- Updated rsmpeg_compat module to handle feature selection
- Simplified configuration: defaults to FFmpeg 8, workflows override as needed

Author: prateekmedia

.github/workflows/build_linux.yml

@@ -29,7 +29,10 @@ jobs:
       run: sudo apt update && sudo apt-get install libgpac-dev libtesseract-dev libavcodec-dev libavdevice-dev libx11-dev libxcb1-dev libxcb-shm0-dev
     - uses: actions/checkout@v4
     - name: build
-      run: ./build -hardsubx
+      run: |
+        # Use FFmpeg 6 for Linux CI
+        export FFMPEG_VERSION=ffmpeg6
+        ./build -hardsubx
       working-directory: ./linux
     - name: Display version information
       run: ./ccextractor --version

.github/workflows/build_windows.yml

@@ -116,6 +116,7 @@ jobs:
           CARGO_TARGET_DIR: "..\\..\\windows"
           BINDGEN_EXTRA_CLANG_ARGS: -fmsc-version=0
           VCPKG_ROOT: ${{ github.workspace }}/vcpkg
+          FFMPEG_VERSION: ffmpeg7
         run: msbuild ccextractor.sln /p:Configuration=Debug-Full /p:Platform=x64
         working-directory: ./windows
       - name: Display version information

linux/build

@@ -13,7 +13,12 @@ while [[ $# -gt 0 ]]; do
       ;;
     -hardsubx)
       HARDSUBX=true
-      RUST_FEATURES="--features hardsubx_ocr"
+      # Allow overriding FFmpeg version via environment variable
+      if [ -n "$FFMPEG_VERSION" ]; then
+        RUST_FEATURES="--features hardsubx_ocr,$FFMPEG_VERSION"
+      else
+        RUST_FEATURES="--features hardsubx_ocr"
+      fi
       BLD_FLAGS="$BLD_FLAGS -DENABLE_HARDSUBX"
       BLD_LINKER="$BLD_LINKER -lswscale -lavutil -pthread -lavformat -lavcodec -lavfilter -lxcb-shm -lxcb -lX11 -llzma -lswresample"
       shift

mac/build.command

@@ -21,7 +21,12 @@ while [[ $# -gt 0 ]]; do
     -hardsubx)
       HARDSUBX=true
       ENABLE_OCR=true
-      RUST_FEATURES="--features hardsubx_ocr"
+      # Allow overriding FFmpeg version via environment variable
+      if [ -n "$FFMPEG_VERSION" ]; then
+        RUST_FEATURES="--features hardsubx_ocr,$FFMPEG_VERSION"
+      else
+        RUST_FEATURES="--features hardsubx_ocr"
+      fi
       shift
       ;;
     -*)

src/rust/Cargo.toml

@@ -41,15 +41,14 @@ wtv_debug = []
 enable_ffmpeg = []
 with_libcurl = []
 
-# FFmpeg version selection features (mutually exclusive, ffmpeg8 is default)
+# FFmpeg version selection features (for manual override)
 ffmpeg6 = ["rsmpeg_ffmpeg6"]
 ffmpeg7 = ["rsmpeg_ffmpeg7"]
 ffmpeg8 = ["rsmpeg_ffmpeg8"]
 
-# hardsubx_ocr will use ffmpeg8 by default, override with --features "hardsubx_ocr,ffmpeg6"
-hardsubx_ocr = ["ffmpeg8", "tesseract-sys", "leptonica-sys"]
-hardsubx_ocr_ffmpeg6 = ["ffmpeg6", "tesseract-sys", "leptonica-sys"]
-hardsubx_ocr_ffmpeg7 = ["ffmpeg7", "tesseract-sys", "leptonica-sys"]
+# hardsubx_ocr defaults to FFmpeg 8, override with --features "hardsubx_ocr,ffmpeg6" or "hardsubx_ocr,ffmpeg7"
+# CI workflows should specify: Linux uses ffmpeg6, Windows uses ffmpeg7, macOS uses ffmpeg8
+hardsubx_ocr = ["rsmpeg_ffmpeg8", "tesseract-sys", "leptonica-sys"]
 
 [profile.release-with-debug]
 inherits = "release"

src/rust/src/rsmpeg_compat.rs

@@ -9,6 +9,6 @@ pub use rsmpeg_ffmpeg7 as rsmpeg;
 #[cfg(feature = "ffmpeg8")]
 pub use rsmpeg_ffmpeg8 as rsmpeg;
 
-// Ensure at least one FFmpeg version is selected
+// Default to ffmpeg8 if no specific version is selected
 #[cfg(not(any(feature = "ffmpeg6", feature = "ffmpeg7", feature = "ffmpeg8")))]
-compile_error!("One of the FFmpeg version features must be enabled: ffmpeg6, ffmpeg7, or ffmpeg8");
+pub use rsmpeg_ffmpeg8 as rsmpeg;

windows/rust.bat

@@ -1,7 +1,12 @@
 for /f "delims=" %%i in ('cd') do set output=%%i
 set CARGO_TARGET_DIR=%output%
 cd ..\src\rust
-cargo build %1 --features "hardsubx_ocr" --target x86_64-pc-windows-msvc
+REM Allow overriding FFmpeg version via environment variable
+IF "%FFMPEG_VERSION%"=="" (
+    cargo build %1 --features "hardsubx_ocr" --target x86_64-pc-windows-msvc
+) ELSE (
+    cargo build %1 --features "hardsubx_ocr,%FFMPEG_VERSION%" --target x86_64-pc-windows-msvc
+)
 cd ..\..\windows
 IF "%~1"=="-r" (
 copy x86_64-pc-windows-msvc\release\ccx_rust.lib .\ccx_rust.lib