Gate AI upscale on ncnn backend

DONE.md

@@ -30,7 +30,15 @@ This file tracks completed features, fixes, and milestones.
   - **UI Polish**
     - "Run Benchmark" button highlighted (HighImportance) on first run
     - Returns to normal styling after initial benchmark
-    - Guides new users to run initial benchmark
+  - Guides new users to run initial benchmark
+
+- ✅ **AI Upscale Integration (Real-ESRGAN)**
+  - Added model presets with anime/general variants
+  - Processing presets (Ultra Fast → Maximum Quality) with tile/TTA tuning
+  - Upscale factor selection + output adjustment slider
+  - Tile size, output frame format, GPU and thread controls
+  - ncnn backend pipeline (extract → AI upscale → reassemble)
+  - Filters and frame rate conversion applied before AI upscaling
 
 - ✅ **Bitrate Preset Simplification**
   - Reduced from 13 confusing options to 6 clear presets
@@ -833,6 +841,9 @@ This file tracks completed features, fixes, and milestones.
 - ✅ Hide quality presets when bitrate mode is not CRF
 - ✅ Snippet UI now shows Convert Snippet + batch + options with context-sensitive controls
 - ✅ Reduced module video pane minimum sizes to allow GNOME window snapping
+- ✅ Added cache/temp directory setting with SSD recommendation and override
+- ✅ Snippet defaults now use conversion settings (not Match Source)
+- ✅ Added frame interpolation presets to Filters and wired filter chain to Upscale
 - ✅ Stabilized video seeking and embedded rendering
 - ✅ Improved player window positioning
 - ✅ Fixed clear video functionality

TODO.md

@@ -66,6 +66,9 @@ This file tracks upcoming features, improvements, and known issues.
   - Quality presets hidden when bitrate mode is not CRF
   - Snippet UI rearranged into Convert Snippet / Batch / Options with context-sensitive visibility
   - Reduce module video pane min sizes to allow GNOME snapping
+  - Cache/temp directory setting with SSD recommendation
+  - Frame interpolation presets in Filters with Upscale linkage
+  - Real-ESRGAN AI upscale controls with ncnn pipeline (models, presets, tiles, TTA)
 
 *Last Updated: 2025-12-20*
 
@@ -109,6 +112,13 @@ This file tracks upcoming features, improvements, and known issues.
   - Creative effects (grayscale, vignette)
   - Real-time preview system
 
+- [ ] **DVD Authoring module**
+  - Output VIDEO_TS folder + burn-ready ISO
+  - Auto-detect NTSC/PAL with manual override
+  - Preserve all audio tracks
+  - Subtitle support (start with SRT)
+  - Chapter sources: existing, manual markers, auto scene length
+
 ### Quality & Compression Improvements
 - [x] **Automatic black bar detection and cropping** (v0.1.0-dev13 - COMPLETED)
   - Implement ffmpeg cropdetect analysis pass

internal/convert/ffmpeg.go

@@ -252,7 +252,7 @@ func ProbeVideo(path string) (*VideoSource, error) {
 
 	// Extract embedded cover art if present
 	if coverArtStreamIndex >= 0 {
-		coverPath := filepath.Join(os.TempDir(), fmt.Sprintf("videotools-embedded-cover-%d.png", time.Now().UnixNano()))
+		coverPath := filepath.Join(utils.TempDir(), fmt.Sprintf("videotools-embedded-cover-%d.png", time.Now().UnixNano()))
 		extractCmd := exec.CommandContext(ctx, FFmpegPath,
 			"-i", path,
 			"-map", fmt.Sprintf("0:%d", coverArtStreamIndex),

internal/modules/handlers.go

@@ -44,6 +44,12 @@ func HandleAudio(files []string) {
 	fmt.Println("audio", files)
 }
 
+// HandleDVDAuthor handles the DVD authoring module (placeholder)
+func HandleDVDAuthor(files []string) {
+	logging.Debug(logging.CatModule, "dvd author handler invoked with %v", files)
+	fmt.Println("dvd author", files)
+}
+
 // HandleSubtitles handles the subtitles module (placeholder)
 func HandleSubtitles(files []string) {
 	logging.Debug(logging.CatModule, "subtitles handler invoked with %v", files)

internal/utils/utils.go

@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+	"sync/atomic"
 	"unicode/utf8"
 
 	"fyne.io/fyne/v2"
@@ -271,3 +272,25 @@ func LoadAppIcon() fyne.Resource {
 	logging.Debug(logging.CatUI, "no app icon found in search paths")
 	return nil
 }
+
+var tempDirOverride atomic.Value
+
+// SetTempDir overrides the app temp directory (empty string resets to system temp).
+func SetTempDir(path string) {
+	trimmed := strings.TrimSpace(path)
+	if trimmed == "" {
+		tempDirOverride.Store("")
+		return
+	}
+	tempDirOverride.Store(trimmed)
+}
+
+// TempDir returns the app temp directory, falling back to the system temp dir.
+func TempDir() string {
+	if v := tempDirOverride.Load(); v != nil {
+		if s, ok := v.(string); ok && s != "" {
+			return s
+		}
+	}
+	return os.TempDir()
+}