Refactor trellis lambda selection to be done in analyse_init instead of in trellis.
This will allow for more easy adaption of lambda later on; for now it allows constant lambda across variable QPs.
QPRD is only available with adaptive quantization enabled and generally improves SSIM and visual quality.
Additionally, weight the SSD values from RD based on the relative QP offset for chroma; helps visually at high QPs where chroma has a lower QP than luma.
This fixes some visual artifacts created by QPRD at high QPs.
Note that this generally hurts PSNR and SSIM, and so is only on when psy-RD is on.
OPT2 = --crf 26 -b4 -m5 -r2 --me hex --cqm jvt --nr 100 --psnr --no-mixed-refs --b-adapt 2
OPT3 = --crf 18 -b3 -m9 -r5 --me umh -t1 -A all --b-pyramid --direct auto --no-fast-pskip
OPT4 = --crf 22 -b3 -m7 -r4 --me esa -t2 -A all --psy-rd 1.0:1.0
-OPT5 = --frames 50 --crf 24 -b3 -m9 -r3 --me tesa -t1
+OPT5 = --frames 50 --crf 24 -b3 -m10 -r3 --me tesa -t1
OPT6 = --frames 50 -q0 -m9 -r2 --me hex -Aall
OPT7 = --frames 50 -q0 -m2 -r1 --me hex --no-cabac
int b_direct_auto_read; /* take stats for --direct auto from the 2pass log */
int b_direct_auto_write; /* analyse direct modes, to use and/or save */
+ /* lambda values */
+ int i_trellis_lambda2[2][2]; /* [luma,chroma][inter,intra] */
+ int i_psy_rd_lambda;
+ int i_chroma_lambda2_offset;
+
/* B_direct and weighted prediction */
int16_t dist_scale_factor[16][2];
int16_t bipred_weight[32][4];
943718, 1189010, 1498059, 1887436 /* 48 - 51 */
};
+// should the intra and inter lambdas be different?
+// I'm just matching the behaviour of deadzone quant.
+static const int x264_trellis_lambda2_tab[2][52] = {
+ // inter lambda = .85 * .85 * 2**(qp/3. + 10 - LAMBDA_BITS)
+ { 46, 58, 73, 92, 117, 147,
+ 185, 233, 294, 370, 466, 587,
+ 740, 932, 1174, 1480, 1864, 2349,
+ 2959, 3728, 4697, 5918, 7457, 9395,
+ 11837, 14914, 18790, 23674, 29828, 37581,
+ 47349, 59656, 75163, 94699, 119313, 150326,
+ 189399, 238627, 300652, 378798, 477255, 601304,
+ 757596, 954511, 1202608, 1515192, 1909022, 2405217,
+ 3030384, 3818045, 4810435, 6060769 },
+ // intra lambda = .65 * .65 * 2**(qp/3. + 10 - LAMBDA_BITS)
+ { 27, 34, 43, 54, 68, 86,
+ 108, 136, 172, 216, 273, 343,
+ 433, 545, 687, 865, 1090, 1374,
+ 1731, 2180, 2747, 3461, 4361, 5494,
+ 6922, 8721, 10988, 13844, 17442, 21976,
+ 27688, 34885, 43953, 55377, 69771, 87906,
+ 110755, 139543, 175813, 221511, 279087, 351627,
+ 443023, 558174, 703255, 886046, 1116348, 1406511,
+ 1772093, 2232697, 2813022, 3544186 }
+};
+
+static const uint16_t x264_chroma_lambda2_offset_tab[] = {
+ 16, 20, 25, 32, 40, 50,
+ 64, 80, 101, 128, 161, 203,
+ 256, 322, 406, 512, 645, 812,
+ 1024, 1290, 1625, 2048, 2580, 3250,
+ 4096, 5160, 6501, 8192, 10321, 13003,
+ 16384, 20642, 26007, 32768, 41285, 52015,
+ 65535
+};
+
/* TODO: calculate CABAC costs */
static const int i_mb_b_cost_table[X264_MBTYPE_MAX] = {
9, 9, 9, 9, 0, 0, 0, 1, 3, 7, 7, 7, 3, 7, 7, 7, 5, 9, 0
static void x264_mb_analyse_init( x264_t *h, x264_mb_analysis_t *a, int i_qp )
{
int i = h->param.analyse.i_subpel_refine - (h->sh.i_type == SLICE_TYPE_B);
+
/* mbrd == 1 -> RD mode decision */
/* mbrd == 2 -> RD refinement */
- a->i_mbrd = (i>=6) + (i>=8);
+ /* mbrd == 3 -> QPRD */
+ a->i_mbrd = (i>=6) + (i>=8) + (h->param.analyse.i_subpel_refine>=10);
+
/* conduct the analysis using this lamda and QP */
a->i_qp = h->mb.i_qp = i_qp;
h->mb.i_chroma_qp = h->chroma_qp_table[i_qp];
+
a->i_lambda = x264_lambda_tab[i_qp];
a->i_lambda2 = x264_lambda2_tab[i_qp];
+
+ h->mb.b_trellis = h->param.analyse.i_trellis > 1 && a->i_mbrd;
+ if( h->mb.b_trellis )
+ {
+ h->mb.i_trellis_lambda2[0][0] = x264_trellis_lambda2_tab[0][h->mb.i_qp];
+ h->mb.i_trellis_lambda2[0][1] = x264_trellis_lambda2_tab[1][h->mb.i_qp];
+ h->mb.i_trellis_lambda2[1][0] = x264_trellis_lambda2_tab[0][h->mb.i_chroma_qp];
+ h->mb.i_trellis_lambda2[1][1] = x264_trellis_lambda2_tab[1][h->mb.i_chroma_qp];
+ }
+ h->mb.i_psy_rd_lambda = a->i_lambda;
+ /* Adjusting chroma lambda based on QP offset hurts PSNR, so we'll leave it as part of psy-RD. */
+ h->mb.i_chroma_lambda2_offset = h->mb.i_psy_rd ? x264_chroma_lambda2_offset_tab[h->mb.i_qp-h->mb.i_chroma_qp+12] : 256;
+
h->mb.i_me_method = h->param.analyse.i_me_method;
h->mb.i_subpel_refine = h->param.analyse.i_subpel_refine;
h->mb.b_chroma_me = h->param.analyse.b_chroma_me && h->sh.i_type == SLICE_TYPE_P
&& h->mb.i_subpel_refine >= 5;
- h->mb.b_trellis = h->param.analyse.i_trellis > 1 && a->i_mbrd;
+
h->mb.b_transform_8x8 = 0;
h->mb.b_noise_reduction = 0;
{
int i_rd8;
x264_analyse_update_cache( h, a );
- h->mb.b_transform_8x8 = !h->mb.b_transform_8x8;
+ h->mb.b_transform_8x8 ^= 1;
/* FIXME only luma is needed, but the score for comparison already includes chroma */
i_rd8 = x264_rd_cost_mb( h, a->i_lambda2 );
*i_rd = i_rd8;
}
else
- h->mb.b_transform_8x8 = !h->mb.b_transform_8x8;
+ h->mb.b_transform_8x8 ^= 1;
}
}
+/* Rate-distortion optimal QP selection.
+ * FIXME: More than half of the benefit of this function seems to be
+ * in the way it improves the coding of chroma DC (by decimating or
+ * finding a better way to code a single DC coefficient.)
+ * There must be a more efficient way to get that portion of the benefit
+ * without doing full QP-RD, but RD-decimation doesn't seem to do the
+ * trick. */
+static inline void x264_mb_analyse_qp_rd( x264_t *h, x264_mb_analysis_t *a )
+{
+ int bcost, cost, direction, failures, prevcost, origcost;
+ int orig_qp = h->mb.i_qp, bqp = h->mb.i_qp;
+ origcost = bcost = x264_rd_cost_mb( h, a->i_lambda2 );
+
+ /* If CBP is already zero, don't raise the quantizer any higher. */
+ for( direction = h->mb.cbp[h->mb.i_mb_xy] ? 1 : -1; direction >= -1; direction-=2 )
+ {
+ h->mb.i_qp = orig_qp;
+ failures = 0;
+ prevcost = origcost;
+ while( h->mb.i_qp > 0 && h->mb.i_qp < 51 )
+ {
+ h->mb.i_qp += direction;
+ h->mb.i_chroma_qp = h->chroma_qp_table[h->mb.i_qp];
+ cost = x264_rd_cost_mb( h, a->i_lambda2 );
+ COPY2_IF_LT( bcost, cost, bqp, h->mb.i_qp );
+
+ /* We can't assume that the costs are monotonic over QPs.
+ * Tie case-as-failure seems to give better results. */
+ if( cost < prevcost )
+ failures = 0;
+ else
+ failures++;
+ prevcost = cost;
+
+ /* Without psy-RD, require monotonicity when lowering
+ * quant, allow 1 failure when raising quant.
+ * With psy-RD, allow 1 failure when lowering quant,
+ * allow 2 failures when raising quant.
+ * Psy-RD generally seems to result in more chaotic
+ * RD score-vs-quantizer curves. */
+ if( failures > ((direction + 1)>>1)+(!!h->mb.i_psy_rd) )
+ break;
+ if( direction == 1 && !h->mb.cbp[h->mb.i_mb_xy] )
+ break;
+ }
+ }
+
+ h->mb.i_qp = bqp;
+ h->mb.i_chroma_qp = h->chroma_qp_table[h->mb.i_qp];
+
+ /* Check transform again; decision from before may no longer be optimal. */
+ if( h->mb.i_qp != orig_qp && x264_mb_transform_8x8_allowed( h ) &&
+ h->param.analyse.b_transform_8x8 )
+ {
+ h->mb.b_transform_8x8 ^= 1;
+ cost = x264_rd_cost_mb( h, a->i_lambda2 );
+ if( cost > bcost )
+ h->mb.b_transform_8x8 ^= 1;
+ }
+}
/*****************************************************************************
* x264_macroblock_analyse:
h->mb.i_qp = x264_ratecontrol_qp( h );
if( h->param.rc.i_aq_mode )
+ {
x264_adaptive_quant( h );
+ /* If the QP of this MB is within 1 of the previous MB, code the same QP as the previous MB,
+ * to lower the bit cost of the qp_delta. Don't do this if QPRD is enabled. */
+ if( analysis.i_mbrd < 3 && abs(h->mb.i_qp - h->mb.i_last_qp) == 1 )
+ h->mb.i_qp = h->mb.i_last_qp;
+ }
x264_mb_analyse_init( h, &analysis, h->mb.i_qp );
if( !analysis.i_mbrd )
x264_mb_analyse_transform( h );
+ if( analysis.i_mbrd == 3 && !IS_SKIP(h->mb.i_type) )
+ x264_mb_analyse_qp_rd( h, &analysis );
+
h->mb.b_trellis = h->param.analyse.i_trellis;
h->mb.b_noise_reduction = !!h->param.analyse.i_noise_reduction;
if( !IS_SKIP(h->mb.i_type) && h->mb.i_psy_trellis && h->param.analyse.i_trellis == 1 )
if( h->param.analyse.i_me_method == X264_ME_TESA &&
(h->mb.b_lossless || h->param.analyse.i_subpel_refine <= 1) )
h->param.analyse.i_me_method = X264_ME_ESA;
- h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 0, 9 );
+ h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 0, 10 );
h->param.analyse.b_mixed_references = h->param.analyse.b_mixed_references && h->param.i_frame_reference > 1;
h->param.analyse.inter &= X264_ANALYSE_PSUB16x16|X264_ANALYSE_PSUB8x8|X264_ANALYSE_BSUB16x16|
X264_ANALYSE_I4x4|X264_ANALYSE_I8x8;
if( h->param.rc.f_aq_strength == 0 )
h->param.rc.i_aq_mode = 0;
h->param.analyse.i_noise_reduction = x264_clip3( h->param.analyse.i_noise_reduction, 0, 1<<16 );
+ if( h->param.analyse.i_subpel_refine == 10 && (h->param.analyse.i_trellis != 2 || !h->param.rc.i_aq_mode) )
+ h->param.analyse.i_subpel_refine = 9;
{
const x264_level_t *l = x264_levels;
{
int i_quant_cat = b_intra ? CQM_4IY : CQM_4PY;
if( h->mb.b_trellis )
- return x264_quant_4x4_trellis( h, dct, i_quant_cat, i_qp, i_ctxBlockCat, b_intra, idx );
+ return x264_quant_4x4_trellis( h, dct, i_quant_cat, i_qp, i_ctxBlockCat, b_intra, 0, idx );
else
return h->quantf.quant_4x4( dct, h->quant4_mf[i_quant_cat][i_qp], h->quant4_bias[i_quant_cat][i_qp] );
}
h->dctf.dct4x4dc( dct_dc4x4 );
if( h->mb.b_trellis )
- nz = x264_quant_dc_trellis( h, (int16_t*)dct_dc4x4, CQM_4IY, i_qp, DCT_LUMA_DC, 1);
+ nz = x264_quant_dc_trellis( h, (int16_t*)dct_dc4x4, CQM_4IY, i_qp, DCT_LUMA_DC, 1, 0 );
else
nz = h->quantf.quant_4x4_dc( dct_dc4x4, h->quant4_mf[CQM_4IY][i_qp][0]>>1, h->quant4_bias[CQM_4IY][i_qp][0]<<1 );
h->dctf.sub8x8_dct_dc( dct2x2, h->mb.pic.p_fenc[1+ch], h->mb.pic.p_fdec[1+ch] );
dct2x2dc_dconly( dct2x2 );
if( h->mb.b_trellis )
- nz_dc = x264_quant_dc_trellis( h, (int16_t*)dct2x2, CQM_4IC+b_inter, i_qp, DCT_CHROMA_DC, !b_inter );
+ nz_dc = x264_quant_dc_trellis( h, (int16_t*)dct2x2, CQM_4IC+b_inter, i_qp, DCT_CHROMA_DC, !b_inter, 1 );
else
nz_dc = h->quantf.quant_2x2_dc( dct2x2, h->quant4_mf[CQM_4IC+b_inter][i_qp][0]>>1, h->quant4_bias[CQM_4IC+b_inter][i_qp][0]<<
1 );
for( i = 0; i < 4; i++ )
{
if( h->mb.b_trellis )
- nz = x264_quant_4x4_trellis( h, dct4x4[i], CQM_4IC+b_inter, i_qp, DCT_CHROMA_AC, !b_inter, 0 );
+ nz = x264_quant_4x4_trellis( h, dct4x4[i], CQM_4IC+b_inter, i_qp, DCT_CHROMA_AC, !b_inter, 1, 0 );
else
nz = h->quantf.quant_4x4( dct4x4[i], h->quant4_mf[CQM_4IC+b_inter][i_qp], h->quant4_bias[CQM_4IC+b_inter][i_qp] );
h->mb.cache.non_zero_count[x264_scan8[16+i+ch*4]] = nz;
}
if( h->mb.b_trellis )
- nz_dc = x264_quant_dc_trellis( h, (int16_t*)dct2x2, CQM_4IC+b_inter, i_qp, DCT_CHROMA_DC, !b_inter );
+ nz_dc = x264_quant_dc_trellis( h, (int16_t*)dct2x2, CQM_4IC+b_inter, i_qp, DCT_CHROMA_DC, !b_inter, 1 );
else
nz_dc = h->quantf.quant_2x2_dc( dct2x2, h->quant4_mf[CQM_4IC+b_inter][i_qp][0]>>1, h->quant4_bias[CQM_4IC+b_inter][i_qp][0]<<1 );
dct4x4[0][0] = 0;
if( h->mb.b_trellis )
- nz = x264_quant_4x4_trellis( h, dct4x4, CQM_4PC, i_qp, DCT_CHROMA_AC, 0, 0 );
+ nz = x264_quant_4x4_trellis( h, dct4x4, CQM_4PC, i_qp, DCT_CHROMA_AC, 0, 1, 0 );
else
nz = h->quantf.quant_4x4( dct4x4, h->quant4_mf[CQM_4PC][i_qp], h->quant4_bias[CQM_4PC][i_qp] );
void x264_cabac_mb_skip( x264_t *h, int b_skip );
int x264_quant_dc_trellis( x264_t *h, int16_t *dct, int i_quant_cat,
- int i_qp, int i_ctxBlockCat, int b_intra );
+ int i_qp, int i_ctxBlockCat, int b_intra, int b_chroma );
int x264_quant_4x4_trellis( x264_t *h, int16_t dct[4][4], int i_quant_cat,
- int i_qp, int i_ctxBlockCat, int b_intra, int idx );
+ int i_qp, int i_ctxBlockCat, int b_intra, int b_chroma, int idx );
int x264_quant_8x8_trellis( x264_t *h, int16_t dct[8][8], int i_quant_cat,
int i_qp, int b_intra, int idx );
{
x264_emms();
h->mb.i_qp = x264_clip3( h->rc->f_qpm + h->fenc->f_qp_offset[h->mb.i_mb_xy] + .5, h->param.rc.i_qp_min, h->param.rc.i_qp_max );
- /* If the QP of this MB is within 1 of the previous MB, code the same QP as the previous MB,
- * to lower the bit cost of the qp_delta. */
- if( abs(h->mb.i_qp - h->mb.i_last_qp) == 1 )
- h->mb.i_qp = h->mb.i_last_qp;
}
int x264_ratecontrol_new( x264_t *h )
int dc = h->pixf.sad[size]( fdec, FDEC_STRIDE, zero, 0 ) >> 1;
satd = abs(h->pixf.satd[size]( fdec, FDEC_STRIDE, zero, 0 ) - dc - sum_satd( h, size, x, y ));
}
- satd = (satd * h->mb.i_psy_rd * x264_lambda_tab[h->mb.i_qp] + 128) >> 8;
+ satd = (satd * h->mb.i_psy_rd * h->mb.i_psy_rd_lambda + 128) >> 8;
}
return h->pixf.ssd[size](fenc, FENC_STRIDE, fdec, FDEC_STRIDE) + satd;
}
static inline int ssd_mb( x264_t *h )
{
- return ssd_plane(h, PIXEL_16x16, 0, 0, 0)
- + ssd_plane(h, PIXEL_8x8, 1, 0, 0)
- + ssd_plane(h, PIXEL_8x8, 2, 0, 0);
+ int chromassd = ssd_plane(h, PIXEL_8x8, 1, 0, 0) + ssd_plane(h, PIXEL_8x8, 2, 0, 0);
+ chromassd = (chromassd * h->mb.i_chroma_lambda2_offset + 128) >> 8;
+ return ssd_plane(h, PIXEL_16x16, 0, 0, 0) + chromassd;
}
static int x264_rd_cost_mb( x264_t *h, int i_lambda2 )
{
uint64_t i_ssd, i_bits;
int i8 = i4 >> 2;
+ int chromassd;
if( i_pixel == PIXEL_16x16 )
{
if( i_pixel == PIXEL_8x16 )
x264_macroblock_encode_p8x8( h, i8+2 );
- i_ssd = ssd_plane( h, i_pixel, 0, (i8&1)*8, (i8>>1)*8 )
- + ssd_plane( h, i_pixel+3, 1, (i8&1)*4, (i8>>1)*4 )
- + ssd_plane( h, i_pixel+3, 2, (i8&1)*4, (i8>>1)*4 );
+ chromassd = ssd_plane( h, i_pixel+3, 1, (i8&1)*4, (i8>>1)*4 )
+ + ssd_plane( h, i_pixel+3, 2, (i8&1)*4, (i8>>1)*4 );
+ chromassd = (chromassd * h->mb.i_chroma_lambda2_offset + 128) >> 8;
+ i_ssd = ssd_plane( h, i_pixel, 0, (i8&1)*8, (i8>>1)*8 ) + chromassd;
if( h->param.b_cabac )
{
}
}
-// should the intra and inter lambdas be different?
-// I'm just matching the behaviour of deadzone quant.
-static const int lambda2_tab[2][52] = {
- // inter lambda = .85 * .85 * 2**(qp/3. + 10 - LAMBDA_BITS)
- { 46, 58, 73, 92, 117, 147,
- 185, 233, 294, 370, 466, 587,
- 740, 932, 1174, 1480, 1864, 2349,
- 2959, 3728, 4697, 5918, 7457, 9395,
- 11837, 14914, 18790, 23674, 29828, 37581,
- 47349, 59656, 75163, 94699, 119313, 150326,
- 189399, 238627, 300652, 378798, 477255, 601304,
- 757596, 954511, 1202608, 1515192, 1909022, 2405217,
- 3030384, 3818045, 4810435, 6060769 },
- // intra lambda = .65 * .65 * 2**(qp/3. + 10 - LAMBDA_BITS)
- { 27, 34, 43, 54, 68, 86,
- 108, 136, 172, 216, 273, 343,
- 433, 545, 687, 865, 1090, 1374,
- 1731, 2180, 2747, 3461, 4361, 5494,
- 6922, 8721, 10988, 13844, 17442, 21976,
- 27688, 34885, 43953, 55377, 69771, 87906,
- 110755, 139543, 175813, 221511, 279087, 351627,
- 443023, 558174, 703255, 886046, 1116348, 1406511,
- 1772093, 2232697, 2813022, 3544186 }
-};
-
typedef struct {
int64_t score;
int level_idx; // index into level_tree[]
const static uint8_t x264_zigzag_scan2[4] = {0,1,2,3};
int x264_quant_dc_trellis( x264_t *h, int16_t *dct, int i_quant_cat,
- int i_qp, int i_ctxBlockCat, int b_intra )
+ int i_qp, int i_ctxBlockCat, int b_intra, int b_chroma )
{
return quant_trellis_cabac( h, (int16_t*)dct,
h->quant4_mf[i_quant_cat][i_qp], h->unquant4_mf[i_quant_cat][i_qp],
NULL, i_ctxBlockCat==DCT_CHROMA_DC ? x264_zigzag_scan2 : x264_zigzag_scan4[h->mb.b_interlaced],
- i_ctxBlockCat, lambda2_tab[b_intra][i_qp], 0, 1, i_ctxBlockCat==DCT_CHROMA_DC ? 4 : 16, 0 );
+ i_ctxBlockCat, h->mb.i_trellis_lambda2[b_chroma][b_intra], 0, 1, i_ctxBlockCat==DCT_CHROMA_DC ? 4 : 16, 0 );
}
int x264_quant_4x4_trellis( x264_t *h, int16_t dct[4][4], int i_quant_cat,
- int i_qp, int i_ctxBlockCat, int b_intra, int idx )
+ int i_qp, int i_ctxBlockCat, int b_intra, int b_chroma, int idx )
{
int b_ac = (i_ctxBlockCat == DCT_LUMA_AC || i_ctxBlockCat == DCT_CHROMA_AC);
return quant_trellis_cabac( h, (int16_t*)dct,
h->quant4_mf[i_quant_cat][i_qp], h->unquant4_mf[i_quant_cat][i_qp],
x264_dct4_weight2_zigzag[h->mb.b_interlaced],
x264_zigzag_scan4[h->mb.b_interlaced],
- i_ctxBlockCat, lambda2_tab[b_intra][i_qp], b_ac, 0, 16, idx );
+ i_ctxBlockCat, h->mb.i_trellis_lambda2[b_chroma][b_intra], b_ac, 0, 16, idx );
}
int x264_quant_8x8_trellis( x264_t *h, int16_t dct[8][8], int i_quant_cat,
h->quant8_mf[i_quant_cat][i_qp], h->unquant8_mf[i_quant_cat][i_qp],
x264_dct8_weight2_zigzag[h->mb.b_interlaced],
x264_zigzag_scan8[h->mb.b_interlaced],
- DCT_LUMA_8x8, lambda2_tab[b_intra][i_qp], 0, 0, 64, idx );
+ DCT_LUMA_8x8, h->mb.i_trellis_lambda2[0][b_intra], 0, 0, 64, idx );
}
" - 6: RD mode decision for I/P-frames\n"
" - 7: RD mode decision for all frames\n"
" - 8: RD refinement for I/P-frames\n"
- " - 9: RD refinement for all frames\n" );
- else H0( " decision quality: 1=fast, 9=best.\n" );
+ " - 9: RD refinement for all frames\n"
+ " - 10: QP-RD - requires trellis=2, aq-mode>0\n" );
+ else H0( " decision quality: 1=fast, 10=best.\n" );
H0( " --psy-rd Strength of psychovisual optimization [\"%.1f:%.1f\"]\n"
" #1: RD (requires subme>=6)\n"
" #2: Trellis (requires trellis, experimental)\n",
else if( !strcasecmp( optarg, "placebo" ) )
{
param->analyse.i_me_method = X264_ME_TESA;
- param->analyse.i_subpel_refine = 9;
+ param->analyse.i_subpel_refine = 10;
param->analyse.i_me_range = 24;
param->i_frame_reference = 16;
param->i_bframe_adaptive = X264_B_ADAPT_TRELLIS;
projects / x264 / commitdiff