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					@ -160,6 +160,32 @@ public class FFmpegUtil { | 
				
			
			
		
	
		
			
				
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					        return volumeCmd.split(" "); | 
				
			
			
		
	
		
			
				
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					    } | 
				
			
			
		
	
		
			
				
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					    /** | 
				
			
			
		
	
		
			
				
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					     * Apply 18 band of equalizer into audio | 
				
			
			
		
	
		
			
				
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					     * | 
				
			
			
		
	
		
			
				
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					     * @param inputPath  input file | 
				
			
			
		
	
		
			
				
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					     * @param bandList   bandList | 
				
			
			
		
	
		
			
				
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					     * @param outputPath output file | 
				
			
			
		
	
		
			
				
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					     */ | 
				
			
			
		
	
		
			
				
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					    public static String[] audioEqualizer(String inputPath, List<String> bandList, String outputPath) { | 
				
			
			
		
	
		
			
				
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					        // unit: Hz  gain:0-20
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					        /*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | 
				
			
			
		
	
		
			
				
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					         |   1b   |   2b   |   3b   |   4b   |   5b   |   6b   |   7b   |   8b   |   9b   | | 
				
			
			
		
	
		
			
				
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					         |   65   |   92   |   131  |   185  |   262  |   370  |   523  |   740  |  1047  | | 
				
			
			
		
	
		
			
				
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					         |- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | 
				
			
			
		
	
		
			
				
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					         |   10b  |   11b  |   12b  |   13b  |   14b  |   15b  |   16b  |   17b  |   18b  | | 
				
			
			
		
	
		
			
				
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					         |   1480 |   2093 |   2960 |   4186 |   5920 |   8372 |  11840 |  16744 |  20000 | | 
				
			
			
		
	
		
			
				
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					         |- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/ | 
				
			
			
		
	
		
			
				
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					        StringBuilder builder = new StringBuilder(); | 
				
			
			
		
	
		
			
				
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					        for (String band:bandList) { | 
				
			
			
		
	
		
			
				
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					            builder.append(band).append(":"); | 
				
			
			
		
	
		
			
				
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					        } | 
				
			
			
		
	
		
			
				
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					        builder.deleteCharAt(builder.length()-1); | 
				
			
			
		
	
		
			
				
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					        String equalizerCmd = "ffmpeg -i %s -af superequalizer=%s -y %s"; | 
				
			
			
		
	
		
			
				
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					        equalizerCmd = String.format(Locale.getDefault(), equalizerCmd, inputPath, builder.toString(), outputPath); | 
				
			
			
		
	
		
			
				
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					        return equalizerCmd.split(" "); | 
				
			
			
		
	
		
			
				
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					    } | 
				
			
			
		
	
		
			
				
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					    /** | 
				
			
			
		
	
		
			
				
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					     * mux audio and video together | 
				
			
			
		
	
		
			
				
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					     * | 
				
			
			
		
	
	
		
			
				
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