diff --git a/ffmpegthumbnailer/moviedecoder.h b/ffmpegthumbnailer/moviedecoder.h
--- a/ffmpegthumbnailer/moviedecoder.h
+++ b/ffmpegthumbnailer/moviedecoder.h
@@ -39,7 +39,7 @@
 
     QString getCodec();
     void seek(int timeInSeconds);
-    void decodeVideoFrame();
+    bool decodeVideoFrame();
     void getScaledVideoFrame(int scaledSize, bool maintainAspectRatio, VideoFrame& videoFrame);
 
     int getWidth();
diff --git a/ffmpegthumbnailer/moviedecoder.cpp b/ffmpegthumbnailer/moviedecoder.cpp
--- a/ffmpegthumbnailer/moviedecoder.cpp
+++ b/ffmpegthumbnailer/moviedecoder.cpp
@@ -227,7 +227,7 @@
 }
 
 
-void MovieDecoder::decodeVideoFrame()
+bool MovieDecoder::decodeVideoFrame()
 {
     bool frameFinished = false;
 
@@ -237,8 +237,9 @@
 
     if (!frameFinished) {
         qDebug() << "decodeVideoFrame() failed: frame not finished";
-        return;
     }
+
+    return frameFinished;
 }
 
 bool MovieDecoder::decodeVideoPacket()
diff --git a/ffmpegthumbnailer/videothumbnailer.cpp b/ffmpegthumbnailer/videothumbnailer.cpp
--- a/ffmpegthumbnailer/videothumbnailer.cpp
+++ b/ffmpegthumbnailer/videothumbnailer.cpp
@@ -98,7 +98,9 @@
 {
     MovieDecoder movieDecoder(videoFile, NULL);
     if (movieDecoder.getInitialized()) {
-        movieDecoder.decodeVideoFrame(); //before seeking, a frame has to be decoded
+        if (!movieDecoder.decodeVideoFrame()) { //before seeking, a frame has to be decoded
+            return;
+        }
         
         if ((!m_WorkAroundIssues) || (movieDecoder.getCodec() != QLatin1String("h264"))) { //workaround for bug in older ffmpeg (100% cpu usage when seeking in h264 files)
             int secondToSeekTo = m_SeekTime.isEmpty() ? movieDecoder.getDuration() * m_SeekPercentage / 100 : timeToSeconds(m_SeekTime);