2 * H.264 encoding using the x264 library
3 * Copyright (C) 2005 Mans Rullgard <mans@mansr.com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/opt.h"
32 typedef struct X264Context {
71 static void X264_log(void *p, int level, const char *fmt, va_list args)
73 static const int level_map[] = {
74 [X264_LOG_ERROR] = AV_LOG_ERROR,
75 [X264_LOG_WARNING] = AV_LOG_WARNING,
76 [X264_LOG_INFO] = AV_LOG_INFO,
77 [X264_LOG_DEBUG] = AV_LOG_DEBUG
80 if (level < 0 || level > X264_LOG_DEBUG)
83 av_vlog(p, level_map[level], fmt, args);
87 static int encode_nals(AVCodecContext *ctx, uint8_t *buf, int size,
88 x264_nal_t *nals, int nnal, int skip_sei)
90 X264Context *x4 = ctx->priv_data;
94 /* Write the SEI as part of the first frame. */
95 if (x4->sei_size > 0 && nnal > 0) {
96 memcpy(p, x4->sei, x4->sei_size);
101 for (i = 0; i < nnal; i++){
102 /* Don't put the SEI in extradata. */
103 if (skip_sei && nals[i].i_type == NAL_SEI) {
104 x4->sei_size = nals[i].i_payload;
105 x4->sei = av_malloc(x4->sei_size);
106 memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload);
109 memcpy(p, nals[i].p_payload, nals[i].i_payload);
110 p += nals[i].i_payload;
116 static int X264_frame(AVCodecContext *ctx, uint8_t *buf,
117 int bufsize, void *data)
119 X264Context *x4 = ctx->priv_data;
120 AVFrame *frame = data;
123 x264_picture_t pic_out;
125 x264_picture_init( &x4->pic );
126 x4->pic.img.i_csp = X264_CSP_I420;
127 x4->pic.img.i_plane = 3;
130 for (i = 0; i < 3; i++) {
131 x4->pic.img.plane[i] = frame->data[i];
132 x4->pic.img.i_stride[i] = frame->linesize[i];
135 x4->pic.i_pts = frame->pts;
137 frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
138 frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
139 frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
141 if (x4->params.b_tff != frame->top_field_first) {
142 x4->params.b_tff = frame->top_field_first;
143 x264_encoder_reconfig(x4->enc, &x4->params);
145 if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den
146 || x4->params.vui.i_sar_width != ctx->sample_aspect_ratio.num) {
147 x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;
148 x4->params.vui.i_sar_width = ctx->sample_aspect_ratio.num;
149 x264_encoder_reconfig(x4->enc, &x4->params);
154 if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
157 bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
160 } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc));
162 /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */
163 x4->out_pic.pts = pic_out.i_pts;
165 switch (pic_out.i_type) {
168 x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
171 x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
175 x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
179 x4->out_pic.key_frame = pic_out.b_keyframe;
181 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
186 static av_cold int X264_close(AVCodecContext *avctx)
188 X264Context *x4 = avctx->priv_data;
190 av_freep(&avctx->extradata);
194 x264_encoder_close(x4->enc);
200 * Detect default settings and use default profile to avoid libx264 failure.
202 static void check_default_settings(AVCodecContext *avctx)
204 X264Context *x4 = avctx->priv_data;
207 score += x4->params.analyse.i_me_range == 0;
208 score += x4->params.rc.i_qp_step == 3;
209 score += x4->params.i_keyint_max == 12;
210 score += x4->params.rc.i_qp_min == 2;
211 score += x4->params.rc.i_qp_max == 31;
212 score += x4->params.rc.f_qcompress == 0.5;
213 score += fabs(x4->params.rc.f_ip_factor - 1.25) < 0.01;
214 score += fabs(x4->params.rc.f_pb_factor - 1.25) < 0.01;
215 score += x4->params.analyse.inter == 0 && x4->params.analyse.i_subpel_refine == 8;
217 av_log(avctx, AV_LOG_ERROR, "Default settings detected, using medium profile\n");
218 x4->preset = av_strdup("medium");
219 if (avctx->bit_rate == 200*1000)
224 #define OPT_STR(opt, param) \
227 if (param && (ret = x264_param_parse(&x4->params, opt, param)) < 0) { \
228 if(ret == X264_PARAM_BAD_NAME) \
229 av_log(avctx, AV_LOG_ERROR, \
230 "bad option '%s': '%s'\n", opt, param); \
232 av_log(avctx, AV_LOG_ERROR, \
233 "bad value for '%s': '%s'\n", opt, param); \
238 #define PARSE_X264_OPT(name, var)\
239 if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
240 av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
241 return AVERROR(EINVAL);\
244 static av_cold int X264_init(AVCodecContext *avctx)
246 X264Context *x4 = avctx->priv_data;
248 x264_param_default(&x4->params);
250 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
251 x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
253 x4->params.i_keyint_min = avctx->keyint_min;
254 if (x4->params.i_keyint_min > x4->params.i_keyint_max)
255 x4->params.i_keyint_min = x4->params.i_keyint_max;
257 x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;
259 x4->params.analyse.inter = 0;
260 if (avctx->partitions) {
261 if (avctx->partitions & X264_PART_I4X4)
262 x4->params.analyse.inter |= X264_ANALYSE_I4x4;
263 if (avctx->partitions & X264_PART_I8X8)
264 x4->params.analyse.inter |= X264_ANALYSE_I8x8;
265 if (avctx->partitions & X264_PART_P8X8)
266 x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
267 if (avctx->partitions & X264_PART_P4X4)
268 x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
269 if (avctx->partitions & X264_PART_B8X8)
270 x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
273 x4->params.analyse.i_direct_mv_pred = avctx->directpred;
275 if (avctx->me_method == ME_EPZS)
276 x4->params.analyse.i_me_method = X264_ME_DIA;
277 else if (avctx->me_method == ME_HEX)
278 x4->params.analyse.i_me_method = X264_ME_HEX;
279 else if (avctx->me_method == ME_UMH)
280 x4->params.analyse.i_me_method = X264_ME_UMH;
281 else if (avctx->me_method == ME_FULL)
282 x4->params.analyse.i_me_method = X264_ME_ESA;
283 else if (avctx->me_method == ME_TESA)
284 x4->params.analyse.i_me_method = X264_ME_TESA;
285 else x4->params.analyse.i_me_method = X264_ME_HEX;
287 x4->params.analyse.i_me_range = avctx->me_range;
288 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
290 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
292 x4->params.analyse.i_trellis = avctx->trellis;
293 x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
295 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);
296 x4->params.rc.f_pb_factor = avctx->b_quant_factor;
297 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
300 check_default_settings(avctx);
302 if (x4->preset || x4->tune) {
303 if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
304 av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
305 return AVERROR(EINVAL);
309 x4->params.pf_log = X264_log;
310 x4->params.p_log_private = avctx;
311 x4->params.i_log_level = X264_LOG_DEBUG;
313 OPT_STR("weightp", x4->wpredp);
315 if (avctx->bit_rate) {
316 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
317 x4->params.rc.i_rc_method = X264_RC_ABR;
319 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
320 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
321 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
322 if (avctx->flags & CODEC_FLAG_PASS2) {
323 x4->params.rc.b_stat_read = 1;
325 #if FF_API_X264_GLOBAL_OPTS
327 x4->params.rc.i_rc_method = X264_RC_CRF;
328 x4->params.rc.f_rf_constant = avctx->crf;
329 x4->params.rc.f_rf_constant_max = avctx->crf_max;
330 } else if (avctx->cqp > -1) {
331 x4->params.rc.i_rc_method = X264_RC_CQP;
332 x4->params.rc.i_qp_constant = avctx->cqp;
337 x4->params.rc.i_rc_method = X264_RC_CRF;
338 x4->params.rc.f_rf_constant = x4->crf;
339 } else if (x4->cqp >= 0) {
340 x4->params.rc.i_rc_method = X264_RC_CQP;
341 x4->params.rc.i_qp_constant = x4->cqp;
344 if (x4->crf_max >= 0)
345 x4->params.rc.f_rf_constant_max = x4->crf_max;
348 OPT_STR("stats", x4->stats);
350 if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&
351 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
352 x4->params.rc.f_vbv_buffer_init =
353 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
356 OPT_STR("level", x4->level);
359 const char *p= x4->x264opts;
361 char param[256]={0}, val[256]={0};
362 sscanf(p, "%255[^:=]=%255[^:]", param, val);
369 #if FF_API_X264_GLOBAL_OPTS
370 if (avctx->aq_mode >= 0)
371 x4->params.rc.i_aq_mode = avctx->aq_mode;
372 if (avctx->aq_strength >= 0)
373 x4->params.rc.f_aq_strength = avctx->aq_strength;
374 if (avctx->psy_rd >= 0)
375 x4->params.analyse.f_psy_rd = avctx->psy_rd;
376 if (avctx->psy_trellis >= 0)
377 x4->params.analyse.f_psy_trellis = avctx->psy_trellis;
378 if (avctx->rc_lookahead >= 0)
379 x4->params.rc.i_lookahead = avctx->rc_lookahead;
380 if (avctx->weighted_p_pred >= 0)
381 x4->params.analyse.i_weighted_pred = avctx->weighted_p_pred;
382 if (avctx->bframebias)
383 x4->params.i_bframe_bias = avctx->bframebias;
384 if (avctx->deblockalpha)
385 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
386 if (avctx->deblockbeta)
387 x4->params.i_deblocking_filter_beta = avctx->deblockbeta;
388 if (avctx->complexityblur >= 0)
389 x4->params.rc.f_complexity_blur = avctx->complexityblur;
390 x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
391 x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;
392 x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
393 x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
394 x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
395 x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT;
396 x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
397 x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD;
398 x4->params.analyse.b_psy = avctx->flags2 & CODEC_FLAG2_PSY;
399 x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
402 if (avctx->gop_size >= 0)
403 x4->params.i_keyint_max = avctx->gop_size;
404 if (avctx->max_b_frames >= 0)
405 x4->params.i_bframe = avctx->max_b_frames;
406 if (avctx->scenechange_threshold >= 0)
407 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
408 if (avctx->qmin >= 0)
409 x4->params.rc.i_qp_min = avctx->qmin;
410 if (avctx->qmax >= 0)
411 x4->params.rc.i_qp_max = avctx->qmax;
412 if (avctx->max_qdiff >= 0)
413 x4->params.rc.i_qp_step = avctx->max_qdiff;
414 if (avctx->qblur >= 0)
415 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
416 if (avctx->qcompress >= 0)
417 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
418 if (avctx->refs >= 0)
419 x4->params.i_frame_reference = avctx->refs;
421 if (x4->aq_mode >= 0)
422 x4->params.rc.i_aq_mode = x4->aq_mode;
423 if (x4->aq_strength >= 0)
424 x4->params.rc.f_aq_strength = x4->aq_strength;
425 PARSE_X264_OPT("psy-rd", psy_rd);
426 PARSE_X264_OPT("deblock", deblock);
428 x4->params.analyse.b_psy = x4->psy;
429 if (x4->rc_lookahead >= 0)
430 x4->params.rc.i_lookahead = x4->rc_lookahead;
431 if (x4->weightp >= 0)
432 x4->params.analyse.i_weighted_pred = x4->weightp;
433 if (x4->weightb >= 0)
434 x4->params.analyse.b_weighted_bipred = x4->weightb;
435 if (x4->cplxblur >= 0)
436 x4->params.rc.f_complexity_blur = x4->cplxblur;
439 x4->params.analyse.b_ssim = x4->ssim;
440 if (x4->intra_refresh >= 0)
441 x4->params.b_intra_refresh = x4->intra_refresh;
442 if (x4->b_bias != INT_MIN)
443 x4->params.i_bframe_bias = x4->b_bias;
444 if (x4->b_pyramid >= 0)
445 x4->params.i_bframe_pyramid = x4->b_pyramid;
446 if (x4->mixed_refs >= 0)
447 x4->params.analyse.b_mixed_references = x4->mixed_refs;
449 x4->params.analyse.b_transform_8x8 = x4->dct8x8;
450 if (x4->fast_pskip >= 0)
451 x4->params.analyse.b_fast_pskip = x4->fast_pskip;
453 x4->params.b_aud = x4->aud;
455 x4->params.rc.b_mb_tree = x4->mbtree;
457 if (x4->fastfirstpass)
458 x264_param_apply_fastfirstpass(&x4->params);
461 if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
462 av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
463 return AVERROR(EINVAL);
466 x4->params.i_width = avctx->width;
467 x4->params.i_height = avctx->height;
468 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
469 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
470 x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
471 x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
473 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
475 x4->params.i_threads = avctx->thread_count;
477 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
479 // x4->params.b_open_gop = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
481 x4->params.i_slice_count = avctx->slices;
483 x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;
485 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
486 x4->params.b_repeat_headers = 0;
488 // update AVCodecContext with x264 parameters
489 avctx->has_b_frames = x4->params.i_bframe ?
490 x4->params.i_bframe_pyramid ? 2 : 1 : 0;
491 avctx->bit_rate = x4->params.rc.i_bitrate*1000;
492 #if FF_API_X264_GLOBAL_OPTS
493 avctx->crf = x4->params.rc.f_rf_constant;
496 x4->enc = x264_encoder_open(&x4->params);
500 avctx->coded_frame = &x4->out_pic;
502 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
506 s = x264_encoder_headers(x4->enc, &nal, &nnal);
508 for (i = 0; i < nnal; i++)
509 if (nal[i].i_type == NAL_SEI)
510 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
512 avctx->extradata = av_malloc(s);
513 avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
519 #define OFFSET(x) offsetof(X264Context,x)
520 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
522 static const AVOption options[] = {
523 { "preset", "Set the encoding preset (cf. x264 --fullhelp)", OFFSET(preset), FF_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
524 { "tune", "Tune the encoding params (cf. x264 --fullhelp)", OFFSET(tune), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
525 { "profile", "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
526 { "fastfirstpass", "Use fast settings when encoding first pass", OFFSET(fastfirstpass), FF_OPT_TYPE_INT, { 1 }, 0, 1, VE},
527 {"level", "Specify level (as defined by Annex A)", OFFSET(level), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
528 {"passlogfile", "Filename for 2 pass stats", OFFSET(stats), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
529 {"wpredp", "Weighted prediction for P-frames", OFFSET(wpredp), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
530 {"x264opts", "x264 options", OFFSET(x264opts), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
531 { "crf", "Select the quality for constant quality mode", OFFSET(crf), FF_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE },
532 { "crf_max", "In CRF mode, prevents VBV from lowering quality beyond this point.",OFFSET(crf_max), FF_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE },
533 { "qp", "Constant quantization parameter rate control method",OFFSET(cqp), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
534 { "aq-mode", "AQ method", OFFSET(aq_mode), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "aq_mode"},
535 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_AQ_NONE}, INT_MIN, INT_MAX, VE, "aq_mode" },
536 { "variance", "Variance AQ (complexity mask)", 0, FF_OPT_TYPE_CONST, {X264_AQ_VARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
537 { "autovariance", "Auto-variance AQ (experimental)", 0, FF_OPT_TYPE_CONST, {X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
538 { "aq-strength", "AQ strength. Reduces blocking and blurring in flat and textured areas.", OFFSET(aq_strength), FF_OPT_TYPE_FLOAT, {-1}, -1, FLT_MAX, VE},
539 { "psy", "Use psychovisual optimizations.", OFFSET(psy), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
540 { "psy-rd", "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), FF_OPT_TYPE_STRING, {0 }, 0, 0, VE},
541 { "rc-lookahead", "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
542 { "weightb", "Weighted prediction for B-frames.", OFFSET(weightb), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
543 { "weightp", "Weighted prediction analysis method.", OFFSET(weightp), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "weightp" },
544 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_NONE}, INT_MIN, INT_MAX, VE, "weightp" },
545 { "simple", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
546 { "smart", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SMART}, INT_MIN, INT_MAX, VE, "weightp" },
547 { "ssim", "Calculate and print SSIM stats.", OFFSET(ssim), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
548 { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
549 { "b-bias", "Influences how often B-frames are used", OFFSET(b_bias), FF_OPT_TYPE_INT, {INT_MIN}, INT_MIN, INT_MAX, VE },
550 { "b-pyramid", "Keep some B-frames as references.", OFFSET(b_pyramid), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "b_pyramid" },
551 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_NONE}, INT_MIN, INT_MAX, VE, "b_pyramid" },
552 { "strict", "Strictly hierarchical pyramid", 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
553 { "normal", "Non-strict (not Blu-ray compatible)", 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
554 { "mixed-refs", "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), FF_OPT_TYPE_INT, {-1}, -1, 1, VE },
555 { "8x8dct", "High profile 8x8 transform.", OFFSET(dct8x8), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
556 { "fast-pskip", NULL, OFFSET(fast_pskip), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
557 { "aud", "Use access unit delimiters.", OFFSET(aud), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
558 { "mbtree", "Use macroblock tree ratecontrol.", OFFSET(mbtree), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
559 { "deblock", "Loop filter parameters, in <alpha:beta> form.", OFFSET(deblock), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
560 { "cplxblur", "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), FF_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE},
564 static const AVClass class = {
565 .class_name = "libx264",
566 .item_name = av_default_item_name,
568 .version = LIBAVUTIL_VERSION_INT,
571 static const AVCodecDefault x264_defaults[] = {
581 { "sc_threshold", "-1" },
582 { "threads", AV_STRINGIFY(X264_THREADS_AUTO) },
586 AVCodec ff_libx264_encoder = {
588 .type = AVMEDIA_TYPE_VIDEO,
590 .priv_data_size = sizeof(X264Context),
592 .encode = X264_frame,
594 .capabilities = CODEC_CAP_DELAY,
595 .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_YUVJ420P, PIX_FMT_NONE },
596 .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
597 .priv_class = &class,
598 .defaults = x264_defaults,