diff --git a/libsrc/ffdec_cli/src/com/jpexs/decompiler/flash/cli/commands/Main.java b/libsrc/ffdec_cli/src/com/jpexs/decompiler/flash/cli/commands/Main.java
index b02ff9bfe..226a43bea 100644
--- a/libsrc/ffdec_cli/src/com/jpexs/decompiler/flash/cli/commands/Main.java
+++ b/libsrc/ffdec_cli/src/com/jpexs/decompiler/flash/cli/commands/Main.java
@@ -46,7 +46,8 @@ import picocli.CommandLine.ScopeType;
             Swf2Xml.class,
             Xml2Swf.class,
             FlashPaper2Pdf.class,
-            Replace.class
+            Replace.class,
+            ReplaceAlpha.class
         },        
         descriptionHeading = "%n@|bold,underline Description|@:%n",        
         optionListHeading = "%n@|bold,underline Options|@:%n",           
diff --git a/libsrc/ffdec_cli/src/com/jpexs/decompiler/flash/cli/commands/ReplaceAlpha.java b/libsrc/ffdec_cli/src/com/jpexs/decompiler/flash/cli/commands/ReplaceAlpha.java
new file mode 100644
index 000000000..21ae4e845
--- /dev/null
+++ b/libsrc/ffdec_cli/src/com/jpexs/decompiler/flash/cli/commands/ReplaceAlpha.java
@@ -0,0 +1,74 @@
+package com.jpexs.decompiler.flash.cli.commands;
+
+import com.jpexs.decompiler.flash.cli.VersionProvider;
+import com.jpexs.decompiler.flash.cli.commands.types.CompressionKind;
+import com.jpexs.decompiler.flash.cli.commands.types.ReplaceFormat;
+import java.util.List;
+import picocli.CommandLine;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.Option;
+import picocli.CommandLine.Parameters;
+import picocli.CommandLine.ParentCommand;
+import picocli.CommandLine.ArgGroup;
+
+/**
+ *
+ * @author JPEXS
+ */
+@Command(
+        name = "replacealpha",
+        mixinStandardHelpOptions = true,
+        versionProvider = VersionProvider.class,
+        header = "Replace the alpha channel of the specified JPEG3 or JPEG4 tag",
+        optionListHeading = "%n@|bold,underline Options|@:%n",           
+        parameterListHeading = "%n@|bold,underline Parameters|@:%n",
+        synopsisHeading = "@|bold,underline Usage|@:",
+        footerHeading = "%n@|bold,underline Examples|@:%n",
+        footer = {
+            "ffdec-cli replacealpha --character-id=13 --data-file=alpha13.bin --character-id=32 --data-file=alpha32.bin  input.swf output.swf",
+            "ffdec-cli replacealpha --character-id=14 --data-file=data.bin input.swf output.swf",
+        },
+        sortSynopsis = false
+)
+public class ReplaceAlpha implements Runnable {      
+    @Parameters(
+            index = "0",
+            paramLabel = "IN_FILE",
+            description = "Input file"
+    )
+    String inFile;
+    
+    @Parameters(
+            index = "1",
+            paramLabel = "OUT_FILE",
+            description = "Output file"
+    )
+    String outFile;
+    
+    @ArgGroup(exclusive = false, multiplicity = "1..*")
+    List<Item> items;
+    
+    static class Item {      
+        
+       @Option(
+                names = "--character-id",
+                description = "Character id",
+                required = true,
+                order = 0
+        )
+        int characterId; 
+                
+        @Option(
+                names = {"--data-file"},
+                description = "Imported data file",
+                required = true,
+                order = 4
+        )
+        String dataFile;        
+    }        
+    
+    @Override
+    public void run() {
+        
+    }
+}