diff --git a/src/main/java/org/forkalsrud/album/video/FlvMetadata.java b/src/main/java/org/forkalsrud/album/video/FlvMetadata.java
index 8f1aa93..005883a 100644
--- a/src/main/java/org/forkalsrud/album/video/FlvMetadata.java
+++ b/src/main/java/org/forkalsrud/album/video/FlvMetadata.java
@@ -458,7 +458,18 @@ public class FlvMetadata {
     }
 
     public void setDuration(String durationStr) {
-        setDuration(Double.parseDouble(durationStr));
+    	if (durationStr != null && durationStr.contains(":")) {
+    		int ps = durationStr.lastIndexOf(':');
+    		double seconds = Double.parseDouble(durationStr.substring(ps + 1));
+    		int pm = durationStr.lastIndexOf(':', ps - 1);
+    		if (pm >= 0) {
+    			seconds += 60 * Double.parseDouble(durationStr.substring(pm + 1, ps));
+    			seconds += 3600 * Double.parseDouble(durationStr.substring(0, pm));
+    		}
+    		setDuration(seconds);
+    	} else {
+    		setDuration(Double.parseDouble(durationStr));
+    	}
     }
     
     public void setDuration(double seconds) {
diff --git a/src/test/java/org/forkalsrud/album/video/FlvMetadataTest.java b/src/test/java/org/forkalsrud/album/video/FlvMetadataTest.java
index 5380e7d..f6da237 100644
--- a/src/test/java/org/forkalsrud/album/video/FlvMetadataTest.java
+++ b/src/test/java/org/forkalsrud/album/video/FlvMetadataTest.java
@@ -104,4 +104,13 @@ public class FlvMetadataTest extends TestCase {
 
         assertEquals(md1, md2);
     }
+
+    public void testSetDuration() {
+    	FlvMetadata m = new FlvMetadata();
+    	m.setDuration("1:02:03");
+    	Object o = m.get("duration");
+    	assertTrue(o.getClass() == Double.class);
+    	Double durationSeconds = (Double) o;
+    	assertEquals(3600 + 2*60 + 3, durationSeconds.intValue());
+    }
 }