diff --git a/src/ext/lib/ar-detect/ArDetector.js b/src/ext/lib/ar-detect/ArDetector.js
index 8c0c55c..9976501 100644
--- a/src/ext/lib/ar-detect/ArDetector.js
+++ b/src/ext/lib/ar-detect/ArDetector.js
@@ -492,6 +492,13 @@ class ArDetector {
     this.conf.resizer.setAr({type: AspectRatio.Automatic, ratio: trueAr}, {type: AspectRatio.Automatic, ratio: trueAr});
   }
 
+  clearImageData(id) {
+    if (ArrayBuffer.transfer) {
+      ArrayBuffer.transfer(id, 0);
+    }
+    id = undefined;
+  }
+
   frameCheck(){
     if(! this.video){
       this.logger.log('error', 'debug', `%c[ArDetect::frameCheck] <@${this.arid}>  Video went missing. Destroying current instance of videoData.`);
@@ -581,6 +588,7 @@ class ArDetector {
 
       this.logger.log('info', 'arDetect_verbose', `%c[ArDetect::frameCheck] Letterbox not detected in fast test. Letterbox is either gone or we manually corrected aspect ratio. Nothing will be done.`, "color: #fa3");
 
+      this.clearImageData(imageData);
       return;
     }
 
@@ -598,6 +606,7 @@ class ArDetector {
     // if both succeed, then aspect ratio hasn't changed.    
     if (!guardLineOut.imageFail && !guardLineOut.blackbarFail) {
       this.logger.log('info', 'arDetect_verbose', `%c[ArDetect::frameCheck] guardLine tests were successful. (no imagefail and no blackbarfail)\n`, "color: #afa", guardLineOut);
+      this.clearImageData(imageData);
       return;
     }
 
@@ -617,6 +626,7 @@ class ArDetector {
       this.guardLine.reset();
       this.noLetterboxCanvasReset = true;
 
+      this.clearImageData(imageData);
       return;
     }
          
@@ -643,6 +653,7 @@ class ArDetector {
 
           triggerTimeout = this.getTimeout(baseTimeout, startTime);
           this.scheduleFrameCheck(triggerTimeout);
+          this.clearImageData(imageData);
           return;
         }
       }
@@ -664,6 +675,8 @@ class ArDetector {
       // rob ni bil zaznan, zato ne naredimo ničesar.
       // no edge was detected. Let's leave things as they were
       this.logger.log('info', 'arDetect_verbose', `%c[ArDetect::frameCheck] Edge wasn't detected with findBars`, "color: #fa3", edgePost, "EdgeStatus.AR_KNOWN:", EdgeStatus.AR_KNOWN);
+
+      this.clearImageData(imageData);
       return;
     }
 
diff --git a/src/ext/lib/ar-detect/GuardLine.js b/src/ext/lib/ar-detect/GuardLine.js
index ca03448..de95cf6 100644
--- a/src/ext/lib/ar-detect/GuardLine.js
+++ b/src/ext/lib/ar-detect/GuardLine.js
@@ -34,7 +34,7 @@ class GuardLine {
     // to odstrani vse neveljavne nastavitve in vse možnosti, ki niso smiselne
     // this removes any configs with invalid values or values that dont make sense
     if (bbTop < 0 || bbBottom >= this.conf.canvas.height ){
-      throw "INVALID_SETTINGS_IN_GUARDLINE"
+      throw {error: "INVALID_SETTINGS_IN_GUARDLINE", bbTop, bbBottom}
     }
 
     this.blackbar = {