JSVM的安装与运行
Jsvm的安装稍简单，只需要将jsvm文件夹拷贝进虚拟机，再进行make就好了。具体操作如下：
解压后找到JSVM文件夹，将文件全部复制到虚拟机
打开终端，进入jsvm->JSVM->H264Extension->build->linux，进行make
这样就安装好了
编码尝试
首先尝试单层编码模式，回到jsvm目录下，进入bin文件夹，新建文档，我命名为one_level.cfg,打开文档，复制配置信息，具体如下：
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# JSVM Configuration File in AVC mode
#====================== GENERAL ================================================ AVCMode 1 # must be one for AVC simulations InputFile input.yuv # input file OutputFile stream.264 # bitstream file ReconFile rec.yuv # reconstructed file SourceWidth 352 # input frame width SourceHeight 288 # input frame height FrameRate 25.0 # frame rate [Hz] FramesToBeEncoded 300 # number of frames
#====================== CODING ================================================= SymbolMode 1 # 0=CAVLC, 1=CABAC Enable8x8Transform 1 # 8x8 luma trafo (0:diabled, 1:enabled) ConstrainedIntraPred 0 # constrained intra prediction (0:off, 1:on) ScalingMatricesPresent 1 # scaling matrices (0:flat, 1:default) BiPred8x8Disable 0 # disable bi-predicted blocks smaller than 8x8 MCBlocksLT8x8Disable 0 # blocks smaller than 8x8 are disabled BasisQP 31 # Quantization parameters
#====================== STRUCTURE ============================================== DPBSize 16 # decoded picture buffer in frames NumRefFrames 16 # maximum number of stored reference frames Log2MaxFrameNum 11 # specifies max. value for frame_num (4..16) Log2MaxPocLsb 7 # specifies coding of POC’s (4..15) SequenceFormatString A0L0*74{P3L0B1L1b0L2b2L2}*1{B1L1b0L2b2L2} # coding structure DeltaLayer0Quant 0 # differential QP for layer 0 DeltaLayer1Quant 3 # differential QP for layer 1 DeltaLayer2Quant 4 # differential QP for layer 2 DeltaLayer3Quant 5 # differential QP for layer 3 DeltaLayer4Quant 6 # differential QP for layer 4 DeltaLayer5Quant 7 # differential QP for layer 5 MaxRefIdxActiveBL0 2 # active entries in ref list 0 for B slices MaxRefIdxActiveBL1 2 # active entries in ref list 1 for B slices MaxRefIdxActiveP 1 # active entries in ref list for P slices
#============================== MOTION SEARCH ================================== SearchMode 4 # Search mode (0:BlockSearch, 4:FastSearch) SearchFuncFullPel 3 # Search function full pel # (0:SAD, 1:SSE, 2:HADAMARD, 3:SAD-YUV) SearchFuncSubPel 2 # Search function sub pel # (0:SAD, 1:SSE, 2:HADAMARD) SearchRange 32 # Search range (Full Pel) FastBiSearch 1 # Fast bi-directional search (0:off, 1:on) BiPredIter 4 # Max iterations for bi-pred search IterSearchRange 8 # Search range for iterations (0: normal)
#============================== LOOP FILTER ==================================== LoopFilterDisable 0 # Loop filter idc (0: on, 1: off, 2: # on except for slice boundaries) LoopFilterAlphaC0Offset 0 # AlphaOffset(-6..+6): valid range LoopFilterBetaOffset 0 # BetaOffset (-6..+6): valid range
#============================== WEIGHTED PREDICTION ============================ WeightedPrediction 0 # Weighting IP Slice (0:disable, 1:enable) WeightedBiprediction 0 # Weighting B Slice (0:disable, 1:explicit, 2:implicit)
#=============================== HRD ===================================== EnableVclHRD 0 # Type I HRD (default 0:Off, 1:on) EnableNalHRD 0 # Type II HRD (default 0:Off, 1:on)
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将样本input.yuv复制进来，
输入指令
./H264AVCEncoderLibTestStatic -pf one_level.cfg
编码开始
结束后会生成rec.yuv和stream.264文件
三层编码
配置文件访问http://concert.itec.aau.at/SVCDataset/
由于1080p太大，我选用较小的360p来进行测试
接下来就是配置文件，我采用的如下信息
进入后打开jsvm文件夹
在虚拟机中新建three_level_360p.cfg文件，配置信息参照图上360p中第一个文本，具体如下：（划线为自己修改部分）
# JSVM Main Configuration File for Sintel Spatial
OutputFile output-360p.264 # Bitstream file
FrameRate 24.0 # Maximum frame rate [Hz]
FramesToBeEncoded 300 # Number of frames
BaseLayerMode 2
IntraPeriod 48 # Intra Period
GOPSize 4 # GOP Size (at maximum frame rate)
SearchMode 4
SearchRange 32
FastBiSearch 1
NumLayers 3
LayerCfg layer0_snr0.cfg
LayerCfg layer0_snr1.cfg
LayerCfg layer0_snr2.cfg
新建三个层配置文件
具体信息如下：（划线部分为自己修改部分）
layer0_snr0.cfg：
# JSVM Layer Configuration File
#====================== INPUT / OUTPUT =========================================
InputFile input_360p.yuv # Input file
SourceWidth 640 # Input frame width
SourceHeight 360 # Input frame height
FrameRateIn 24 # Input frame rate [Hz]
FrameRateOut 24 # Output frame rate [Hz]
IDRPeriod 48
#ProfileIdc 0 # 0 auto, 66 baseline, 77 main, 88 extended, 100 high, 83 scalable baseline, 86 scalable high
QP 30 # Quantization parameters
MeQP0 30 # QP for mot. est. / mode decision (stage 0)
MeQP1 30 # QP for mot. est. / mode decision (stage 1)
MeQP2 30 # QP for mot. est. / mode decision (stage 2)
MeQP3 30 # QP for mot. est. / mode decision (stage 3)
MeQP4 30 # QP for mot. est. / mode decision (stage 4)
MeQP5 30 # QP for mot. est. / mode decision (stage 5)
layer0_snr1.cfg：
# JSVM Layer Configuration File
#====================== INPUT / OUTPUT =========================================
InputFile input_360p.yuv # Input file
SourceWidth 640 # Input frame width
SourceHeight 360 # Input frame height
FrameRateIn 24 # Input frame rate [Hz]
FrameRateOut 24 # Output frame rate [Hz]
IDRPeriod 48
InterLayerPred 1 # Inter-layer Pred. (0: no, 1: yes, 2:adap.)
QP 28 # Quantization parameters
MeQP0 28 # QP for mot. est. / mode decision (stage 0)
MeQP1 28 # QP for mot. est. / mode decision (stage 1)
MeQP2 28 # QP for mot. est. / mode decision (stage 2)
MeQP3 28 # QP for mot. est. / mode decision (stage 3)
MeQP4 28 # QP for mot. est. / mode decision (stage 4)
MeQP5 28 # QP for mot. est. / mode decision (stage 5)
layer0_snr2.cfg：
# JSVM Layer Configuration File
#====================== INPUT / OUTPUT =========================================
InputFile input_360p.yuv # Input file
SourceWidth 640 # Input frame width
SourceHeight 360 # Input frame height
FrameRateIn 24 # Input frame rate [Hz]
FrameRateOut 24 # Output frame rate [Hz]
IDRPeriod 48
InterLayerPred 1 # Inter-layer Pred. (0: no, 1: yes, 2:adap.)
QP 24 # Quantization parameters
MeQP0 24 # QP for mot. est. / mode decision (stage 0)
MeQP1 24 # QP for mot. est. / mode decision (stage 1)
MeQP2 24 # QP for mot. est. / mode decision (stage 2)
MeQP3 24 # QP for mot. est. / mode decision (stage 3)
MeQP4 24 # QP for mot. est. / mode decision (stage 4)
MeQP5 24 # QP for mot. est. / mode decision (stage 5)
运行：
首先用ffmpeg将之前的input.mp4文件提取视频像素格式
指令
./ffmpeg -i input.mp4 input_360p.yuv
然后用jsvm进行编码，
指令：./H264AVCEncoderLibTestStatic -pf three_level_360p.cfg
生成了文件output_360p.264以及rec.yuv