############################### # General encoding parameters # ############################### # threads = # Sets the number of threads to be used for processing. N must be # between 1 and 4 inclusive. #threads = 1 # 2pass_bug_workaround # Enables a workaround for an x264 bug which sometimes causes the # second pass of a 2-pass encode to fail while reading the 2-pass # logfile. 2pass_bug_workaround ########################### # Video stream properties # ########################### # level_idc = # Sets the H.264 level to use for encoding. N can be any of the # following (note that the resolutions given are only examples; see # e.g. http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC): # # N Level Max. bitrate Resolution (WxH@FPS) # -- ----- ------------ ------------ # 10 1 64 kbit/s 176x144@15 # 11 1.1 192 kbit/s 320x240@10 # 12 1.2 384 kbit/s 320x240@20 # 13 1.3 768 kbit/s 352x288@30 # 20 2 2 Mbit/s 352x288@30 # 21 2.1 4 Mbit/s 352x480@30 # 22 2.2 4 Mbit/s 720x480@15 # 30 3 10 Mbit/s 720x480@30 # 31 3.1 14 Mbit/s 1280x720@30 # 32 3.2 20 Mbit/s 1280x720@60 # 40 4 20 Mbit/s 1920x1088@30 # 41 4.1 50 Mbit/s 1920x1088@30 # 42 4.2 50 Mbit/s 1920x1088@60 # 50 5 135 Mbit/s 2560x1920@30 # 51 5.1 240 Mbit/s 4096x2048@30 #level_idc = 51 # overscan = # vidformat = # fullrange | nofullrange # colorprim = # transfer = # colmatrix = # chroma_loc = # Set H.264 VUI properties. See the source code for details. #overscan = 0 #vidformat = 5 #nofullrange #colorprim = 2 #transfer = 2 #colmatrix = 2 #chroma_loc = 0 ######################## # Bitstream parameters # ######################## # frameref = # Specifies the maximum number of reference frames to use (1-16). #frameref = 1 # keyint_min = # keyint_max = # Specify the minimum and maximum keyframe intervals. #keyint_min = 25 #keyint_max = 250 # scenecut = # Specifies the scene change detection threshold as a percentage # (0-100), or -1 to disable. #scenecut = 40 # bframes = # Specifies the number of B-frames between two reference frames (0-16). #bframes = 0 # b_adapt | nob_adapt # Specifies whether or not to use adaptive B-frame encoding. #b_adapt # b_bias = # Influences how often B-frames are used. is from -90 to 100 # inclusive. #b_bias = 0 # b_pyramid | nob_pyramid # Specifies whether to allow B-frames to be used as references. #nob_pyramid # deblock | nodeblock # Selects whether to use the deblocking filter. # deblockalpha = # deblockbeta = # Specify parameters for the deblocking filter. and are # between -6 and 6 inclusive. #deblock #deblockalpha = 0 #deblockbeta = 0 # cabac | nocabac # Selects whether to use CABAC (context-adaptive binary arithmetic # coding). # cabac_init_idc = # Specifies an internal CABAC parameter. #cabac #cabac_init_idc = 0 # cqm = # Specifies the type of quantization matrices to use: # 0: Flat matrices # 1: JVT matrices # 2: Custom matrices # cqm_file = # Specifies the pathname for the custom matrix file with "cqm 2". #cqm = 0 #cqm_file = /dev/null ############################### # Encoder analyzer parameters # ############################### # 8x8dct | no8x8dct # Specifies whether to allow integer 8x8 DCT transforms. #no8x8dct # weight_b | noweight_b # Specifies whether to use implicit weighting for B-frames. #noweight_b # direct_pred = # Selects the type of motion vector (MV) prediction to use: # 0: none, 1: spatial, 2: temporal, 3: auto #direct_pred = 1 # direct_8x8 | nodirect_8x8 # Specifies whether to DISallow 4x4 direct partitions. Default depends # on level_idc. #nodirect_8x8 # chroma_qp_offset = # Specifies the QP offset between chroma and luma (-12 to +12). #chroma_qp_offset = 0 # me = # Selects the motion estimation algorithm to use: # 0: diagonal search, radius 1 (fast) # 1: hexagonal search, radius 2 # 2: uneven multi-hexagon search # 3: exhaustive search (slow) #me = 1 # me_range = # Specifies the motion estimation search range (from the predicted MV), # 4 to 64 inclusive. #me_range = 16 # mv_range = # Specifies the maximum length of a motion vector, 32-2048 pixels. # Default depends on level_idc. #mv_range = 512 # subq = # Specifies the subpixel motion estimation quality, from 1 (fastest) # to 7 (best). #subq = 5 # chroma_me | nochroma_me # Specifies whether to use chroma in motion estimation. #chroma_me # mixed_refs | nomixed_refs # Specifies whether to allow macroblock partitions in P-frames to have # individual references. #nomixed_refs # trellis = # Specifies whether to use trellis RD quantization. Requires CABAC. # is one of: # 0: disabled # 1: enabled only for final encoding of a macroblock # 2: enabled for all mode decisions #trellis = 0 # fast_pskip | nofast_pskip # Specifies whether to use early SKIP detection for P-frames. #fast_pskip # dct_decimate | nodct_decimate # Specifies whether to use transform coefficient thresholding on P-frames. #dct_decimate # nr = # Specifies noise reduction level (0-65536). #nr = 0 # psnr | nopsnr # ssim | nossim # Specify whether to calculate PSNR/SSIM statistics (consumes some CPU # time). #psnr #ssim ########################### # Rate control parameters # ########################### # qp_min = # qp_max = # Specify the minimum and maximum allowed QP values (0-51, 0=lossless). # qp_step = # Specifies the maximum difference between QP in consecutive frames. #qp_min = 10 #qp_max = 51 #qp_step = 4 # crf = # Specifies the nominal QP for 1-pass VBR encoding. #crf = 0 # ratetol = # Specifies the allowed variance from the average bitrate. #ratetol = 1.0 # vbv_maxrate = # Specifies the maximum allowed local bitrate, in kbit/s. #vbv_maxrate = 0 # vbv_bufsize = # Specifies the size of the VBV buffer for CBR encoding, in kbit. #vbv_bufsize = 0 # vbv_init = # Specifies the initial occupancy of the VBV buffer as a decimal value. #vbv_init = 0.9 # ip_ratio = # Specifies the QP ratio between I-frames and P-frames. #ip_ratio = 1.4 # pb_ratio # Specifies the QP ratio between P-frames and B-frames. #pb_ratio = 1.3 # rc_eq = # Specifies the rate control equation. #rc_eq = blurCplx^(1-qComp) # qcomp = # Specifies the QP curve compression ratio. 0.0 gives constant bitrate # encoding, while 1.0 gives constant quality encoding. #qcomp = 0.6 # cplx_blur = # Specifies the amount by which to blur complexity before QP compression. #cplx_blur = 20.0 # qblur = # Specifies the amount by which to blur the QP value after QP compression. #qblur = 0.5 # zones = # Specifies exceptions to the rate control handling for particular # frame ranges. The string is a slash-separated sequence of zones, # where each zone takes the form "start-frame,end-frame,option". # "start-frame" and "end-frame" define the zone, and "option" is one of: # q=: force QP to (0-51) # b=: multiply bitrate by (decimal value) #zones = 0,100,q=10/200,300,b=1.5