1. 增加配置持久化

2. 完善细节

internal/task/manager.go

@@ -5,6 +5,7 @@ import (
 	"ffmpeg-gui/internal/ffmpeg"
 	"ffmpeg-gui/internal/media"
 	"fmt"
+	"os"
 	"sync"
 	"time"
 
@@ -193,6 +194,26 @@ func (m *Manager) runTask(t *Task) {
 		return
 	}
 
+	// For burn tasks: extract internal subtitles to temp files first.
+	// The subtitles filter (libass) hangs on Windows when re-opening the
+	// input via si= — extracting avoids the file re-open entirely.
+	var tempFiles []string
+	if t.Type == TypeBurn {
+		for i, sub := range t.Subtitle.Subtitles {
+			if sub.Source == "internal" {
+				tmpPath := t.OutputFile + fmt.Sprintf(".sub_%d_tmp.srt", i)
+				if _, err := m.exec.RunSync("-y", "-i", t.InputFile,
+					"-map", fmt.Sprintf("0:s:%d", sub.Index), "-c:s", "srt", tmpPath); err != nil {
+					m.completeTask(t, false, fmt.Sprintf("提取字幕轨道 #%d 失败: %v", sub.Index, err))
+					return
+				}
+				t.Subtitle.Subtitles[i].Source = "external"
+				t.Subtitle.Subtitles[i].FilePath = tmpPath
+				tempFiles = append(tempFiles, tmpPath)
+			}
+		}
+	}
+
 	args := BuildArgs(t, m.hwAccel)
 	t.Args = args
 
@@ -234,8 +255,14 @@ func (m *Manager) runTask(t *Task) {
 
 	<-done
 	runErr := <-errCh
+
+	// Clean up temp subtitle files
+	for _, f := range tempFiles {
+		os.Remove(f)
+	}
+
 	if runErr != nil {
-		m.completeTask(t, false, fmt.Sprintf("编码失败: %v", runErr))
+		m.completeTask(t, false, fmt.Sprintf("%s失败: %v", taskTypeLabel(t.Type), runErr))
 	} else {
 		m.completeTask(t, true, "")
 	}
@@ -260,6 +287,11 @@ func (m *Manager) completeTask(t *Task, success bool, errMsg string) {
 	}
 	t.CompletedAt = &now
 	m.emit(EventTaskUpdated, t)
+	// Emit final progress so frontend bar reaches 100%
+	m.emit(EventTaskProgress, map[string]any{
+		"taskId":   t.ID,
+		"progress": t.Progress,
+	})
 }
 
 func (m *Manager) find(taskID string) *Task {
@@ -276,3 +308,16 @@ func (m *Manager) emit(eventType string, data any) {
 		m.onEvent(eventType, data)
 	}
 }
+
+func taskTypeLabel(typ Type) string {
+	switch typ {
+	case TypeRemux:
+		return "封装"
+	case TypeEncode:
+		return "转码"
+	case TypeBurn:
+		return "字幕烧录"
+	default:
+		return "任务"
+	}
+}

internal/task/task.go

@@ -36,8 +36,8 @@ type Task struct {
 	Encode      ffmpeg.EncodeSettings   `json:"encode,omitempty"`
 	Remux       ffmpeg.RemuxSettings    `json:"remux,omitempty"`
 	Subtitle    ffmpeg.SubtitleSettings `json:"subtitle,omitempty"`
-	Args        []string                `json:"-"`
-	Logs        []string                `json:"-"`
+	Args        []string                `json:"args,omitempty"`
+	Logs        []string                `json:"logs,omitempty"`
 	Error       string                  `json:"error,omitempty"`
 	CreatedAt   time.Time               `json:"createdAt"`
 	CompletedAt *time.Time              `json:"completedAt,omitempty"`