可以通过ffmpeg设置的Intel Qsv参数

QSV参数


"async_depth","Maximumprocessingparallelism"


"avbr_accuracy","AccuracyoftheAVBRratecontrol",


"avbr_convergence","ConvergenceoftheAVBRratecontrol"


"preset"

"veryfast"

"faster"

"fast"

"medium"

"slow"

"slower"

"veryslow"


"vcm","Usethevideoconferencingmoderatecontrol"


"rdo","Enableratedistortionoptimization"


"max_frame_size","Maximumencodedframesizeinbytes"


"max_slice_size","Maximumencodedslicesizeinbytes"


"bitrate_limit","Togglebitratelimitations"


"mbbrc","MBlevelbitratecontrol"


"extbrc","Extendedbitratecontrol"


"adaptive_i","AdaptiveI-frameplacement"


"adaptive_b","AdaptiveB-frameplacement"


"b_strategy","StrategytochoosebetweenI/P/B-frames"


"cavlc","EnableCAVLC"


"idr_interval","Distance(inI-frames)betweenIDRframes"


"pic_timing_sei","InsertpicturetimingSEIwithpic_struct_syntaxelement"


"single_sei_nal_unit","PutalltheSEImessagesintooneNALU"


"max_dec_frame_buffering","MaximumnumberofframesbufferedintheDPB"


"look_ahead","UseVBRalgorithmwithlookahead"


"look_ahead_depth","Depthoflookaheadinnumberframes"


"look_ahead_downsampling"

"unknown"

"off"

"2x"


"int_ref_type","Intrarefreshtype"

"none"

"vertical"


"int_ref_cycle_size","Numberofframesintheintrarefreshcycle"


"int_ref_qp_delta","QPdifferencefortherefreshMBs"


"recovery_point_sei","InsertrecoverypointSEImessages"


"trellis","Trellisquantization"

"off"

"I"

"P"

"B"


"profile"

"unknown"

"baseline"

"main"

"high"


"a53cc","UseA53ClosedCaptions(ifavailable)",


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