upgrade: gwencoder v3.1 with interactive menu and Tdarr alignment

gwencoder/scripts/add_resolution_feature.sh

@@ -0,0 +1,74 @@
+#!/bin/bash
+# Script to add resolution preset support to main.go
+# This script will guide you through the manual changes needed
+
+echo "================================================================"
+echo "Resolution Preset Integration Script"
+echo "================================================================"
+echo ""
+echo "Since main.go is in .gitignore, please make the following changes manually:"
+echo ""
+
+cat << 'EOF'
+
+STEP 1: Add Resolution field to EncodingOptions struct
+-------------------------------------------------------
+Find the EncodingOptions struct (search for "type EncodingOptions struct")
+Add this field:
+
+    Resolution string  // Resolution preset (480p, 720p, 1080p, original)
+
+
+STEP 2: Add resolution flag in parseFlags() function
+----------------------------------------------------
+Find where flags are defined (search for "flag.String" or "flag.Bool")
+Add this line with the other flag definitions:
+
+    resolution := flag.String("resolution", "", "Target resolution (480p, 720p, 1080p, original)")
+
+Then in the EncodingOptions initialization, add:
+
+    Resolution: *resolution,
+
+
+STEP 3: Integrate into encodeFile() function
+--------------------------------------------
+Find the encodeFile() function and locate where FFmpeg command is built.
+Add this code BEFORE building the FFmpeg command:
+
+    // Build scale filter for resolution preset
+    scaleFilter := ""
+    if opts.Resolution != "" {
+        filter, err := encoding.BuildScaleFilter(file, opts.Resolution)
+        if err != nil {
+            fmt.Printf("⚠️  Warning: Could not build scale filter: %v\n", err)
+        } else if filter != "" {
+            scaleFilter = filter
+            targetHeight := encoding.GetResolutionPresetHeight(opts.Resolution)
+            fmt.Printf("📐 Scaling video to %dp\n", targetHeight)
+        }
+    }
+
+Then when building the FFmpeg args array, if scaleFilter is not empty,
+add it to the command arguments (typically after video codec args).
+
+
+STEP 4: Update printHelp() function
+-----------------------------------
+Find the printHelp() function and add in the appropriate section:
+
+    fmt.Println("\n📐 Resolution Options:")
+    fmt.Println("  --resolution <preset>     Scale video to target resolution")
+    fmt.Println("                            Options: 480p, 720p, 1080p, original")
+    fmt.Println("                            Only scales down, never upscales")
+
+
+EOF
+
+echo ""
+echo "================================================================"
+echo "After making these changes:"
+echo "  1. Save main.go"
+echo "  2. Run: make clean && make build"
+echo "  3. Test with: ./build/gwencoder --help"
+echo "================================================================"