Fix CRF UI sync and stabilize player

internal/player/unified_ffmpeg_player.go

@@ -12,8 +12,8 @@ import (
 	"sync"
 	"time"
 
-	"git.leaktechnologies.dev/stu/VideoTools/internal/utils"
 	"git.leaktechnologies.dev/stu/VideoTools/internal/logging"
+	"git.leaktechnologies.dev/stu/VideoTools/internal/utils"
 )
 
 // UnifiedPlayer implements rock-solid video playback with proper A/V synchronization
@@ -555,7 +555,6 @@ func (p *UnifiedPlayer) detectVideoProperties() error {
 		}
 	}
 
-
 	if p.frameRate > 0 && p.duration > 0 {
 		p.videoInfo = &VideoInfo{
 			Width:      p.windowW,
@@ -589,13 +588,18 @@ func (p *UnifiedPlayer) writeStringToStdin(cmd string) {
 
 // updateAVSync maintains synchronization between audio and video
 func (p *UnifiedPlayer) updateAVSync() {
-	// Simple drift correction using master clock reference
+	// PTS-based drift correction with adaptive timing
+	p.mu.RLock()
+	defer p.mu.RUnlock()
+
 	if p.audioPTS > 0 && p.videoPTS > 0 {
 		drift := p.audioPTS - p.videoPTS
-		if abs(drift) > 1000 { // More than 1 frame of drift
+		if abs(drift) > 900 { // More than 10ms of drift (at 90kHz)
+			logging.Debug(logging.CatPlayer, "A/V sync drift: %d PTS", drift)
+			// Gradual adjustment to avoid audio glitches
+			p.ptsOffset += drift / 10 // 10% correction per frame
+		} else {
 			logging.Debug(logging.CatPlayer, "A/V sync drift: %d PTS", drift)
-			// Adjust sync clock gradually
-			p.ptsOffset += drift / 100
 		}
 	}
 }

internal/ui/colors.go

@@ -44,7 +44,7 @@ var (
 // Audio Codec Colors (Secondary but Distinct)
 var (
 	ColorOpus   = utils.MustHex("#8B5CF6") // Violet - Modern audio
-	ColorAAC    = utils.MustHex("#7C3AED") // Purple-Blue - Common audio
+	ColorAAC    = utils.MustHex("#06B6D4") // Cyan - Common audio (distinct from purple codecs)
 	ColorFLAC   = utils.MustHex("#EC4899") // Magenta - Lossless audio
 	ColorMP3    = utils.MustHex("#F43F5E") // Rose - Legacy audio
 	ColorAC3    = utils.MustHex("#F97316") // Orange-Red - Surround audio

main.go

@@ -6883,6 +6883,22 @@ func buildConvertView(state *appState, src *videoSource) fyne.CanvasObject {
 	manualQualityOption := "Manual (CRF)"
 	var crfEntry *widget.Entry
 	var manualCrfRow *fyne.Container
+	var crfContainer *fyne.Container
+
+	normalizeBitrateMode := func(mode string) string {
+		switch {
+		case strings.HasPrefix(mode, "CRF"):
+			return "CRF"
+		case strings.HasPrefix(mode, "CBR"):
+			return "CBR"
+		case strings.HasPrefix(mode, "VBR"):
+			return "VBR"
+		case strings.HasPrefix(mode, "Target Size"):
+			return "Target Size"
+		default:
+			return mode
+		}
+	}
 
 	// State setters with automatic widget synchronization
 	setQuality := func(val string) {
@@ -6898,6 +6914,17 @@ func buildConvertView(state *appState, src *videoSource) fyne.CanvasObject {
 					crfEntry.SetText("23")
 				}
 			}
+			if normalizeBitrateMode(state.convert.BitrateMode) == "CRF" {
+				if manualCrfRow != nil {
+					manualCrfRow.Show()
+				}
+				if crfEntry != nil {
+					crfEntry.Enable()
+				}
+				if crfContainer != nil {
+					crfContainer.Show()
+				}
+			}
 		} else {
 			if state.convert.CRF != "" {
 				state.convert.CRF = ""
@@ -7214,7 +7241,6 @@ func buildConvertView(state *appState, src *videoSource) fyne.CanvasObject {
 		qualitySectionSimple       fyne.CanvasObject
 		qualitySectionAdv          fyne.CanvasObject
 		simpleBitrateSelect        *widget.Select
-		crfContainer               *fyne.Container
 		bitrateContainer           *fyne.Container
 		targetSizeContainer        *fyne.Container
 		resetConvertDefaults       func()
@@ -7913,12 +7939,6 @@ func buildConvertView(state *appState, src *videoSource) fyne.CanvasObject {
 		"VBR":         "VBR (Variable Bitrate)",
 		"Target Size": "Target Size (Calculate from file size)",
 	}
-	normalizeBitrateMode := func(mode string) string {
-		if shortCode, ok := bitrateModeMap[mode]; ok {
-			return shortCode
-		}
-		return mode
-	}
 	bitrateModeSelect = widget.NewSelect(bitrateModeOptions, func(value string) {
 		// Extract short code from label
 		if shortCode, ok := bitrateModeMap[value]; ok {