bugfix

src/encGroup.js

@@ -206,7 +206,7 @@ export class H264EncWWGroup extends WWGroup {
       try {
         this.#channels[this.#curProcWW].writeStep2();
       } catch (e) {
-        if (e instanceof ChnlSetupConflictError)
+        if (e instanceof ChnlStepConflictError)
           throw new Error("Need to call directWPrepare() before directWConfirm");
       }
     }, false);