Fix macOS build configuration for FFmpeg and OCR libraries

- Add proper include and library paths for Homebrew-installed FFmpeg
- Add Leptonica and Tesseract library paths for Apple Silicon Macs
- Fix library linking names (use -lleptonica instead of -llept)
- Add ENABLE_OCR flag when building with hardsubx support
- Add FFmpeg include path detection in Rust build.rs for bindgen

Author: prateekmedia

mac/build.command

@@ -20,6 +20,7 @@ while [[ $# -gt 0 ]]; do
       ;;
     -hardsubx)
       HARDSUBX=true
+      ENABLE_OCR=true
       RUST_FEATURES="--features hardsubx_ocr"
       shift
       ;;
@@ -49,6 +50,53 @@ fi
 
 BLD_INCLUDE="-I../src/ -I../src/lib_ccx -I../src/lib_hash -I../src/thirdparty/libpng -I../src/thirdparty -I../src/thirdparty/zlib -I../src/thirdparty/freetype/include `pkg-config --cflags --silence-errors gpac`"
 
+# Add FFmpeg include path for Mac
+if [[ -d "/opt/homebrew/Cellar/ffmpeg" ]]; then
+    FFMPEG_VERSION=$(ls -1 /opt/homebrew/Cellar/ffmpeg | head -1)
+    if [[ -n "$FFMPEG_VERSION" ]]; then
+        BLD_INCLUDE="$BLD_INCLUDE -I/opt/homebrew/Cellar/ffmpeg/$FFMPEG_VERSION/include"
+    fi
+elif [[ -d "/usr/local/Cellar/ffmpeg" ]]; then
+    FFMPEG_VERSION=$(ls -1 /usr/local/Cellar/ffmpeg | head -1)
+    if [[ -n "$FFMPEG_VERSION" ]]; then
+        BLD_INCLUDE="$BLD_INCLUDE -I/usr/local/Cellar/ffmpeg/$FFMPEG_VERSION/include"
+    fi
+fi
+
+# Add Leptonica include path for Mac
+if [[ -d "/opt/homebrew/Cellar/leptonica" ]]; then
+    LEPT_VERSION=$(ls -1 /opt/homebrew/Cellar/leptonica | head -1)
+    if [[ -n "$LEPT_VERSION" ]]; then
+        BLD_INCLUDE="$BLD_INCLUDE -I/opt/homebrew/Cellar/leptonica/$LEPT_VERSION/include"
+    fi
+elif [[ -d "/usr/local/Cellar/leptonica" ]]; then
+    LEPT_VERSION=$(ls -1 /usr/local/Cellar/leptonica | head -1)
+    if [[ -n "$LEPT_VERSION" ]]; then
+        BLD_INCLUDE="$BLD_INCLUDE -I/usr/local/Cellar/leptonica/$LEPT_VERSION/include"
+    fi
+elif [[ -d "/opt/homebrew/include/leptonica" ]]; then
+    BLD_INCLUDE="$BLD_INCLUDE -I/opt/homebrew/include"
+elif [[ -d "/usr/local/include/leptonica" ]]; then
+    BLD_INCLUDE="$BLD_INCLUDE -I/usr/local/include"
+fi
+
+# Add Tesseract include path for Mac  
+if [[ -d "/opt/homebrew/Cellar/tesseract" ]]; then
+    TESS_VERSION=$(ls -1 /opt/homebrew/Cellar/tesseract | head -1)
+    if [[ -n "$TESS_VERSION" ]]; then
+        BLD_INCLUDE="$BLD_INCLUDE -I/opt/homebrew/Cellar/tesseract/$TESS_VERSION/include"
+    fi
+elif [[ -d "/usr/local/Cellar/tesseract" ]]; then
+    TESS_VERSION=$(ls -1 /usr/local/Cellar/tesseract | head -1)
+    if [[ -n "$TESS_VERSION" ]]; then
+        BLD_INCLUDE="$BLD_INCLUDE -I/usr/local/Cellar/tesseract/$TESS_VERSION/include"
+    fi
+elif [[ -d "/opt/homebrew/include/tesseract" ]]; then
+    BLD_INCLUDE="$BLD_INCLUDE -I/opt/homebrew/include"
+elif [[ -d "/usr/local/include/tesseract" ]]; then
+    BLD_INCLUDE="$BLD_INCLUDE -I/usr/local/include"
+fi
+
 if [[ "$ENABLE_OCR" == "true" ]]; then
     BLD_INCLUDE="$BLD_INCLUDE `pkg-config --cflags --silence-errors tesseract`"
 fi
@@ -109,7 +157,42 @@ if [[ "$ENABLE_OCR" == "true" ]]; then
 fi
 
 if [[ "$HARDSUBX" == "true" ]]; then
-    BLD_LINKER="$BLD_LINKER -lswscale -lavutil -pthread -lavformat -lavcodec -lavfilter"
+    # Add FFmpeg library path for Mac
+    if [[ -d "/opt/homebrew/Cellar/ffmpeg" ]]; then
+        FFMPEG_VERSION=$(ls -1 /opt/homebrew/Cellar/ffmpeg | head -1)
+        if [[ -n "$FFMPEG_VERSION" ]]; then
+            BLD_LINKER="$BLD_LINKER -L/opt/homebrew/Cellar/ffmpeg/$FFMPEG_VERSION/lib"
+        fi
+    elif [[ -d "/usr/local/Cellar/ffmpeg" ]]; then
+        FFMPEG_VERSION=$(ls -1 /usr/local/Cellar/ffmpeg | head -1)
+        if [[ -n "$FFMPEG_VERSION" ]]; then
+            BLD_LINKER="$BLD_LINKER -L/usr/local/Cellar/ffmpeg/$FFMPEG_VERSION/lib"
+        fi
+    fi
+    
+    # Add library paths for Leptonica and Tesseract from Cellar
+    if [[ -d "/opt/homebrew/Cellar/leptonica" ]]; then
+        LEPT_VERSION=$(ls -1 /opt/homebrew/Cellar/leptonica | head -1)
+        if [[ -n "$LEPT_VERSION" ]]; then
+            BLD_LINKER="$BLD_LINKER -L/opt/homebrew/Cellar/leptonica/$LEPT_VERSION/lib"
+        fi
+    fi
+    
+    if [[ -d "/opt/homebrew/Cellar/tesseract" ]]; then
+        TESS_VERSION=$(ls -1 /opt/homebrew/Cellar/tesseract | head -1)
+        if [[ -n "$TESS_VERSION" ]]; then
+            BLD_LINKER="$BLD_LINKER -L/opt/homebrew/Cellar/tesseract/$TESS_VERSION/lib"
+        fi
+    fi
+    
+    # Also add homebrew lib path as fallback
+    if [[ -d "/opt/homebrew/lib" ]]; then
+        BLD_LINKER="$BLD_LINKER -L/opt/homebrew/lib"
+    elif [[ -d "/usr/local/lib" ]]; then
+        BLD_LINKER="$BLD_LINKER -L/usr/local/lib"
+    fi
+    
+    BLD_LINKER="$BLD_LINKER -lswscale -lavutil -pthread -lavformat -lavcodec -lavfilter -lleptonica -ltesseract"
 fi
 
 echo "Running pre-build script..."

src/rust/build.rs

@@ -65,6 +65,38 @@ fn main() {
     #[cfg(feature = "hardsubx_ocr")]
     {
         builder = builder.clang_arg("-DENABLE_HARDSUBX");
+        
+        // Add FFmpeg include paths for Mac
+        if cfg!(target_os = "macos") {
+            // Try common Homebrew paths
+            if std::path::Path::new("/opt/homebrew/include").exists() {
+                builder = builder.clang_arg("-I/opt/homebrew/include");
+            } else if std::path::Path::new("/usr/local/include").exists() {
+                builder = builder.clang_arg("-I/usr/local/include");
+            }
+            
+            // Check Homebrew Cellar for FFmpeg
+            let cellar_ffmpeg = "/opt/homebrew/Cellar/ffmpeg";
+            if std::path::Path::new(cellar_ffmpeg).exists() {
+                // Find the FFmpeg version directory
+                if let Ok(entries) = std::fs::read_dir(cellar_ffmpeg) {
+                    for entry in entries {
+                        if let Ok(entry) = entry {
+                            let include_path = entry.path().join("include");
+                            if include_path.exists() {
+                                builder = builder.clang_arg(format!("-I{}", include_path.display()));
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+            
+            // Also check environment variable
+            if let Ok(ffmpeg_include) = env::var("FFMPEG_INCLUDE_DIR") {
+                builder = builder.clang_arg(format!("-I{}", ffmpeg_include));
+            }
+        }
     }
 
     // Tell cargo to invalidate the built crate whenever any of the