Frame-type options:
keyint_min [optional] - The minimum distance between I-frames.
Allowed values:
Default:
integer
25
sc_threshold [optional] - Adjusts the sensitivity of x264's scenecut detection.
Allowed values:
Default:
integer
40
bf [optional] - B-frames.
Allowed values:
Default:
integer
16
b_strategy [optional] - Adaptively decides through a low-resolution lookahead the best number of B-frames to use.
Allowed values:
Default:
0,1,2
1
flags2 [optional] - Allows B-frames to be kept as references.
Allowed values:
Default:
+bpyramid, +wpred, +mixed_refs, +dct8×8, -fastpskip/+fastpskip, +aud.
None
coder [optional] - CABAC is the default entropy encoder used by x264.
Allowed values:
Default:
0,1
1(CABAC enabled)
refs [optional] - This parameter lets one specify how many references can be used, through a maximum of 16.
Allowed values:
Default:
integer
6
flags [optional] - Disable loop filter.
Allowed values:
Default:
-loop/+loop,-psnr/+psnr
+loop (Enabled)
deblockalpha, deblockbeta [optional] - One of H.264's main features is the in-loop deblocker, which avoids the problem of blocking artifacts disrupting motion estimation.
Allowed values:
Default:
integer
0 (Must have '-flags +loop')
Ratecontrol:
cqp [optional] - Constant quantizer mode.
Allowed values:
Default:
integer
None
crf [optional] - Constant quality mode (also known as constant ratefactor).
Allowed values:
Default:
float
None
qmin [optional] - Minimum quantizer.
Allowed values:
Default:
integer
10
qmax [optional] - Maximum quantizer.
Allowed values:
Default:
integer
50
qdiff [optional] - Set max QP step.
Allowed values:
Default:
integer
4
bt [optional] - Allowed variance of average bitrate.
Allowed values:
Default:
integer
None
i_qfactor [optional] - Qscale difference between I-frames and P-frames.
b_qfactor [optional] - Qscale difference between P-frames and B-frames.
Allowed values:
Default:
float
0.71
b_qfactor [optional] - Qscale difference between P-frames and B-frames.
Allowed values:
Default:
float
None
chromaoffset [optional] - QP difference between chroma and luma.
Allowed values:
Default:
integer
None
pass [optional]
Allowed values:
Default:
<1,2,3>
None
rc_eq [optional] - Ratecontrol equation.
Allowed values:
Default:
string
blurCplx^(1-qComp)
qcomp [optional] - QP curve compression: 0.0 => CBR, 1.0 => CQP.
Allowed values:
Default:
float
0.60
complexityblur [optional] - Reduce fluctuations in QP (before curve compression).
Allowed values:
Default:
float
20.0
qblur [optional] - Reduce fluctuations in QP (after curve compression) .
Allowed values:
Default:
float
0.5
Analysis:
partitions [optional] - One of H.264's most useful features is the ability to choose among many combinations of inter and intra partitions.
Allowed values:
Default:
+partp8x8,+partp4x4,+partb8x8,+parti8x8,+parti4x4
None
directpred [optional]
Allowed values:
Default:
integer
None
flags2 [optional] - This allows B-frames to use weighted prediction options other than the default. There is no real speed cost for this, so it should always be enabled.
Allowed values:
Default:
+bpyramid,+wpred,+mixed_refs,+dct8×8,-fastpskip/+fastpskip,–no-fast-pskip/nothing,+aud.
+wpred
me_method [optional]
Allowed values:
Default:
<epzs,hex,umh,full>
None
me_range [optional] - MErange controls the max range of the motion search.
Allowed values:
Default:
integer
16
subq [optional] - MErange controls the max range of the motion search.
Allowed values:
Default:
integer
6
trellis [optional] - Trellis chooses the optimal rounding choices for the maximum rate-distortion score, to maximize PSNR relative to bitrate.
Allowed values:
Default:
<0,1,2>
None
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