diff --git a/FFmpegAndroid/src/main/java/com/github/hiteshsondhi88/libffmpeg/FFmpegExecuteAsyncTask.java b/FFmpegAndroid/src/main/java/com/github/hiteshsondhi88/libffmpeg/FFmpegExecuteAsyncTask.java
index fca2937..4d9a68c 100644
--- a/FFmpegAndroid/src/main/java/com/github/hiteshsondhi88/libffmpeg/FFmpegExecuteAsyncTask.java
+++ b/FFmpegAndroid/src/main/java/com/github/hiteshsondhi88/libffmpeg/FFmpegExecuteAsyncTask.java
@@ -89,6 +89,10 @@ private void checkAndUpdateProcess() throws TimeoutException, InterruptedExcepti
                 String line;
                 BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()));
                 while ((line = reader.readLine()) != null) {
+                    if (isCancelled()) {
+                        return;
+                    }
+
                     output += line+"\n";
                     publishProgress(line);
                 }