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question about tiler

Hello everyone,

We use DVRRDK3.0 now,in our project,we want to use sclr link to convert 1920*1080 picture to 1280*720,but we encounter the erro:

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[m3vpss ] 16097:WARN
[m3vpss ] 16097:TILER AllocFailed:CntMode:0,Width=1280,Height=736
[m3vpss ] 16097: SYSTEM : FREE SPACE : System Heap = 3440 B, Mbx = 10239 msgs)
[m3vpss ] 16097: SYSTEM : FREE SPACE : SR0 Heap = 10082048 B (9 MB)
[m3vpss ] 16097: SYSTEM : FREE SPACE : Frame Buffer = 764800 B (0 MB)
[m3vpss ] 16097: SYSTEM : FREE SPACE : Bitstream Buffer = 222061952 B (211 MB)
[m3vpss ] 16098: SYSTEM : FREE SPACE : Tiler 8-bit = 3342336 B (3 MB) - TILER ON
[m3vpss ] 16098: SYSTEM : FREE SPACE : Tiler 16-bit = 69103616 B (65 MB) - TILER ON
[m3vpss ] 16098: Assertion @ Line: 159 in utils/src/utils_tiler.c: (UInt32)(pFrame->addr[0][0]) != SYSTEM_TILER_INVALID_ADDR : failed !!!

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but when I convert it to 960*540,it's normal.

I want to known the reason,thank you for every reply.