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The different from RESIZEA and RESIZEB in DM8127

hello,

      I was doing some works on DM8127 based on MCFW 3.5, and I want to modify the RESIZEA and RESIZEB to work flexibly. When I want to output one stream, I can chose anyone of the two,and the other will be  colsed. now, I can open RESIZEA close RESIZB, but, open RESIZB close RESIZA lead to error, like this "####### REISER OVERFLOW OCCURED:RESTARTING...#############". The action of close is disabled the clock  of RESIZE.  I modified parameters when initializing, and the values of registers of RESIZEA and RESIZEB is the same, the setting like resolution、format,is also the same. Is there samething I lost?

THX.