<Property> <Name>logVideoDecodingParameters</Name> <Value>true</Value> <Type>Boolean</Type> </Property>
输出的日志信息位于wowzastreamingengine_access.log文件中，看起来应该是下面的样子：
TranscoderWorkerVideoDecoder.setupDecoder[_defaultVHost_:live/_definst_/myStream: decodeIterations:0]: Video decoding parameters # long: dpb_size: Set DPB size option mainconcept.dpb_size: 0 # long: deinterlaceDoubleRate: 0:single rate (default), 1:double rate default.deinterlaceDoubleRate: 0 # long: optCPUNum: Sets number of logical CPUs, which can be used in specified SMP mode by the optSMPMode command mainconcept.optCPUNum: 4 # long: optACCMode: Hardware acceleration mode: 0:ACC_MODE_NONE, 1:ACC_MODE_DXVA1, 2:ACC_MODE_DXVA2, 3:ACC_MODE_NVCUVID mainconcept.optACCMode: -1 # long: output_8bit: Allow only 8bit output image option: 0:off, 1:on mainconcept.output_8bit: 0 # long: deinterlace: 1=default (field interpolation top),256=field interpolation top, 768=field interpolation bottom, 512=vertical smoothing (add 2048 to reorder fields) default.deinterlace: 0 # long: optSMPMode: Sets symmetric multiprocessing (SMP) mode of decoding: 0:SMP_NONE, 1:SMP_BY_PICTURES, 2:SMP_BY_SLICES mainconcept.optSMPMode: 1 # long: maxTemporalLayer: Set maximum layer to be decode (default is 8) mainconcept.maxTemporalLayer: 0 # long: ec: Set Error concealemnt modes (bitmask): 0:NONE, 1:SHOW_BASE_LAYER (SVC only), 2:CONCEAL_ERROR_FRAMES, 4:TEMPORAL_FOR_INTRA, 8:ERRORLESS_REF_ONLY mainconcept.ec: 0 # long: loop_filter: Set loop filter mode option: 0:off, 1:on mainconcept.loop_filter: 1 # long: mv_precision: Limits precision of motion vectors option: 0:PRECISION_QUARTER, 1:H264VD_MV_PRECISION_HALF, 2:H264VD_MV_PRECISION_FULL mainconcept.mv_precision: 0
根据这些信息，你可以在转码模板的<Decode>部分的Video下的<Parameters>中添加这些一个Parameter参数，将参数设置为你希望的值。
举个例子：
比如下面这个日志：
# long: deinterlaceDoubleRate: 0:single rate (default), 1:double rate default.deinterlaceDoubleRate: 0
我们可以用下面的配置来修改deinterlaceDoubleRate的设置：
<Parameter> <!-- 0:single rate (default), 1:double rate --> <Name>default.deinterlaceDoubleRate</Name> <Value>0</Value> <Type>Long</Type> </Parameter>