diff --git a/src/MediaFX/encoder.cpp b/src/MediaFX/encoder.cpp
index 617b3f8..63ab618 100644
--- a/src/MediaFX/encoder.cpp
+++ b/src/MediaFX/encoder.cpp
@@ -76,6 +76,7 @@ void Encoder::setFrameSize(const QSize& frameSize)
             return;
         }
         m_frameSize = frameSize;
+        m_frameByteSize = frameSize.width() * frameSize.height() * 4;
         emit frameSizeChanged();
     }
 }
@@ -193,6 +194,16 @@ bool Encoder::encode(const QAudioBuffer& audioBuffer, const QByteArray& videoDat
         emit encodingError();
         return false;
     }
+    if (audioBuffer.format().sampleRate() != sampleRate()) {
+        qmlWarning(this) << "Audio buffer has incorrect sampleRate";
+        emit encodingError();
+        return false;
+    }
+    if (videoData.size() != m_frameByteSize) {
+        qmlWarning(this) << "Video buffer has incorrect byte size";
+        emit encodingError();
+        return false;
+    }
     AVPacket* videoPacket = m_videoStream->packet();
     videoPacket->flags |= AV_PKT_FLAG_KEY;
     // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast, cppcoreguidelines-pro-type-reinterpret-cast)
diff --git a/src/MediaFX/encoder.h b/src/MediaFX/encoder.h
index dfb027d..87bb36f 100644
--- a/src/MediaFX/encoder.h
+++ b/src/MediaFX/encoder.h
@@ -71,6 +71,7 @@ public slots:
 
     bool m_isValid = false;
     QSize m_frameSize;
+    int m_frameByteSize = 0;
     Rational m_frameRate = DefaultFrameRate;
     int m_sampleRate = DefaultSampleRate;
     QString m_outputFileName;