初始提交：短剧库源码（含转码优化 ultrafast）

internal/app/ui_ffmpeg.go

@@ -0,0 +1,24 @@
+package app
+
+import (
+	"context"
+	"net/http"
+)
+
+func (app *UIApp) handleFFmpeg(writer http.ResponseWriter, request *http.Request) {
+	installer := app.downloader.ffmpegInstallation()
+	switch request.Method {
+	case http.MethodGet:
+		writeJSON(writer, http.StatusOK, installer.snapshot())
+	case http.MethodPost:
+		var input struct{}
+		if !readPlaybackRequest(writer, request, &input) {
+			return
+		}
+		installer.retry()
+		go func() { _, _ = installer.ensure(context.Background()) }()
+		writeJSON(writer, http.StatusAccepted, map[string]bool{"ok": true})
+	default:
+		writeJSON(writer, http.StatusMethodNotAllowed, map[string]string{"error": "method not allowed"})
+	}
+}