+ ReleaseDate metric matching step for differentiating multiple shows with the same name, usually nudging things towards the more recent episode/series.

source/net/sourceforge/filebot/similarity/EpisodeMetrics.java

@@ -284,6 +284,26 @@ public enum EpisodeMetrics implements SimilarityMetric {
 			
 			return null;
 		}
+	}),
+	
+	// Match by file last modified and episode release dates
+	TimeStamp(new TimeStampMetric() {
+		
+		@Override
+		public float getSimilarity(Object o1, Object o2) {
+			// adjust differentiation accuracy to about a year
+			return (float) (floor(super.getSimilarity(o1, o2) * 40) / 40);
+		}
+		
+		
+		@Override
+		public long getTimeStamp(Object object) {
+			if (object instanceof Episode) {
+				return ((Episode) object).airdate().getTimeStamp();
+			}
+			
+			return super.getTimeStamp(object);
+		}
 	});
 	
 	// inner metric
@@ -338,11 +358,12 @@ public enum EpisodeMetrics implements SimilarityMetric {
 		// 4 pass: divide by folder / file name and show name / episode title
 		// 5 pass: divide by name (rounded into n levels)
 		// 6 pass: divide by generic numeric similarity
-		// 7 pass: resolve remaining collisions via absolute string similarity
+		// 7 pass: prefer episodes that were aired closer to the last modified date of the file
+		// 8 pass: resolve remaining collisions via absolute string similarity
 		if (includeFileMetrics) {
-			return new SimilarityMetric[] { FileSize, new MetricCascade(FileName, EpisodeFunnel), EpisodeBalancer, SubstringFields, new MetricCascade(SubstringSequence, Name), Numeric, new NameSimilarityMetric() };
+			return new SimilarityMetric[] { FileSize, new MetricCascade(FileName, EpisodeFunnel), EpisodeBalancer, SubstringFields, new MetricCascade(SubstringSequence, Name), Numeric, Name, TimeStamp, new NameSimilarityMetric() };
 		} else {
-			return new SimilarityMetric[] { EpisodeFunnel, EpisodeBalancer, SubstringFields, new MetricCascade(SubstringSequence, Name), Numeric, new NameSimilarityMetric() };
+			return new SimilarityMetric[] { EpisodeFunnel, EpisodeBalancer, SubstringFields, new MetricCascade(SubstringSequence, Name), Numeric, Name, TimeStamp, new NameSimilarityMetric() };
 		}
 	}
 	

source/net/sourceforge/filebot/similarity/TimeStampMetric.java

@@ -0,0 +1,38 @@
+
+package net.sourceforge.filebot.similarity;
+
+
+import static java.lang.Math.*;
+
+import java.io.File;
+
+
+public class TimeStampMetric implements SimilarityMetric {
+	
+	@Override
+	public float getSimilarity(Object o1, Object o2) {
+		long t1 = getTimeStamp(o1);
+		long t2 = getTimeStamp(o2);
+		
+		if (t1 <= 0 || t2 <= 0)
+			return 0;
+		
+		float min = min(t1, t2);
+		float max = max(t1, t2);
+		
+		return min / max;
+	}
+	
+	
+	public long getTimeStamp(Object obj) {
+		if (obj instanceof File) {
+			return ((File) obj).lastModified();
+		}
+		if (obj instanceof Number) {
+			return ((Number) obj).longValue();
+		}
+		
+		return -1;
+	}
+	
+}

source/net/sourceforge/filebot/subtitle/SubtitleUtilities.java

@@ -3,9 +3,8 @@ package net.sourceforge.filebot.subtitle;
 
 
 import static java.lang.Math.*;
-import static java.util.Arrays.*;
-import static java.util.Collections.*;
 import static net.sourceforge.filebot.MediaTypes.*;
+import static net.sourceforge.filebot.similarity.EpisodeMetrics.*;
 import static net.sourceforge.filebot.similarity.Normalization.*;
 import static net.sourceforge.tuned.FileUtilities.*;
 
@@ -30,6 +29,7 @@ import net.sourceforge.filebot.similarity.EpisodeMetrics;
 import net.sourceforge.filebot.similarity.Match;
 import net.sourceforge.filebot.similarity.Matcher;
 import net.sourceforge.filebot.similarity.MetricAvg;
+import net.sourceforge.filebot.similarity.MetricCascade;
 import net.sourceforge.filebot.similarity.NameSimilarityMetric;
 import net.sourceforge.filebot.similarity.SequenceMatchSimilarity;
 import net.sourceforge.filebot.similarity.SimilarityMetric;
@@ -46,10 +46,8 @@ public final class SubtitleUtilities {
 	public static Map<File, SubtitleDescriptor> matchSubtitles(Collection<File> files, Collection<SubtitleDescriptor> subtitles, boolean strict) throws InterruptedException {
 		Map<File, SubtitleDescriptor> subtitleByVideo = new LinkedHashMap<File, SubtitleDescriptor>();
 		
-		SimilarityMetric[] metrics = EpisodeMetrics.defaultSequence(false);
-		
 		// optimize for generic media <-> subtitle matching
-		replaceAll(asList(metrics), EpisodeMetrics.SubstringFields, EpisodeMetrics.SubstringSequence);
+		SimilarityMetric[] metrics = new SimilarityMetric[] { EpisodeFunnel, EpisodeBalancer, SubstringSequence, new MetricCascade(SubstringSequence, Name), Numeric, new NameSimilarityMetric() };
 		
 		// first match everything as best as possible, then filter possibly bad matches
 		Matcher<File, SubtitleDescriptor> matcher = new Matcher<File, SubtitleDescriptor>(files, subtitles, false, metrics);

source/net/sourceforge/filebot/web/Date.java

@@ -49,6 +49,11 @@ public class Date implements Serializable {
 	}
 	
 	
+	public long getTimeStamp() {
+		return new GregorianCalendar(year, month, day).getTimeInMillis();
+	}
+	
+	
 	@Override
 	public boolean equals(Object obj) {
 		if (obj instanceof Date) {