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	3838e8fc21
	
	
	
		
			
			This is utilized by various media ingests to figure out the bit rate of the content you are pushing towards it, so write it for video, audio and subtitle tracks in case at least one nonzero value is available. It is only mentioned for timed metadata sample descriptions in QTFF, so limit it only to ISOBMFF (MODE_MP4) mode. Updates the FATE tests which have their results changed due to the 20 extra bytes being written per track.
		
			
				
	
	
		
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| b751a2d3b4e693ca39d4fafa0175fc9d *tests/data/fate/vsynth2-mpeg4.mp4
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| 159330 tests/data/fate/vsynth2-mpeg4.mp4
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| 2645405bc5350acc85ad72f3352f5135 *tests/data/fate/vsynth2-mpeg4.out.rawvideo
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| stddev:    6.02 PSNR: 32.53 MAXDIFF:   89 bytes:  7603200/  7603200
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