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 {
73 static void X264_log(void *p, int level, const char *fmt, va_list args)
75 static const int level_map[] = {
76 [X264_LOG_ERROR] = AV_LOG_ERROR,
77 [X264_LOG_WARNING] = AV_LOG_WARNING,
78 [X264_LOG_INFO] = AV_LOG_INFO,
79 [X264_LOG_DEBUG] = AV_LOG_DEBUG
82 if (level < 0 || level > X264_LOG_DEBUG)
85 av_vlog(p, level_map[level], fmt, args);
89 static int encode_nals(AVCodecContext *ctx, uint8_t *buf, int size,
90 x264_nal_t *nals, int nnal, int skip_sei)
92 X264Context *x4 = ctx->priv_data;
96 /* Write the SEI as part of the first frame. */
97 if (x4->sei_size > 0 && nnal > 0) {
98 memcpy(p, x4->sei, x4->sei_size);
103 for (i = 0; i < nnal; i++){
104 /* Don't put the SEI in extradata. */
105 if (skip_sei && nals[i].i_type == NAL_SEI) {
106 x4->sei_size = nals[i].i_payload;
107 x4->sei = av_malloc(x4->sei_size);
108 memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload);
111 memcpy(p, nals[i].p_payload, nals[i].i_payload);
112 p += nals[i].i_payload;
118 static int X264_frame(AVCodecContext *ctx, uint8_t *buf,
119 int bufsize, void *data)
121 X264Context *x4 = ctx->priv_data;
122 AVFrame *frame = data;
125 x264_picture_t pic_out;
127 x264_picture_init( &x4->pic );
128 x4->pic.img.i_csp = X264_CSP_I420;
129 x4->pic.img.i_plane = 3;
132 for (i = 0; i < 3; i++) {
133 x4->pic.img.plane[i] = frame->data[i];
134 x4->pic.img.i_stride[i] = frame->linesize[i];
137 x4->pic.i_pts = frame->pts;
139 frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
140 frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
141 frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
143 if (x4->params.b_tff != frame->top_field_first) {
144 x4->params.b_tff = frame->top_field_first;
145 x264_encoder_reconfig(x4->enc, &x4->params);
147 if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den
148 || x4->params.vui.i_sar_width != ctx->sample_aspect_ratio.num) {
149 x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;
150 x4->params.vui.i_sar_width = ctx->sample_aspect_ratio.num;
151 x264_encoder_reconfig(x4->enc, &x4->params);
156 if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
159 bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
162 } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc));
164 /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */
165 x4->out_pic.pts = pic_out.i_pts;
167 switch (pic_out.i_type) {
170 x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
173 x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
177 x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
181 x4->out_pic.key_frame = pic_out.b_keyframe;
183 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
188 static av_cold int X264_close(AVCodecContext *avctx)
190 X264Context *x4 = avctx->priv_data;
192 av_freep(&avctx->extradata);
196 x264_encoder_close(x4->enc);
202 * Detect default settings and use default profile to avoid libx264 failure.
204 static void check_default_settings(AVCodecContext *avctx)
206 X264Context *x4 = avctx->priv_data;
209 score += x4->params.analyse.i_me_range == 0;
210 score += x4->params.rc.i_qp_step == 3;
211 score += x4->params.i_keyint_max == 12;
212 score += x4->params.rc.i_qp_min == 2;
213 score += x4->params.rc.i_qp_max == 31;
214 score += x4->params.rc.f_qcompress == 0.5;
215 score += fabs(x4->params.rc.f_ip_factor - 1.25) < 0.01;
216 score += fabs(x4->params.rc.f_pb_factor - 1.25) < 0.01;
217 score += x4->params.analyse.inter == 0 && x4->params.analyse.i_subpel_refine == 8;
219 av_log(avctx, AV_LOG_ERROR, "Default settings detected, using medium profile\n");
220 x4->preset = av_strdup("medium");
221 if (avctx->bit_rate == 200*1000)
226 #define OPT_STR(opt, param) \
229 if (param && (ret = x264_param_parse(&x4->params, opt, param)) < 0) { \
230 if(ret == X264_PARAM_BAD_NAME) \
231 av_log(avctx, AV_LOG_ERROR, \
232 "bad option '%s': '%s'\n", opt, param); \
234 av_log(avctx, AV_LOG_ERROR, \
235 "bad value for '%s': '%s'\n", opt, param); \
240 #define PARSE_X264_OPT(name, var)\
241 if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
242 av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
243 return AVERROR(EINVAL);\
246 static av_cold int X264_init(AVCodecContext *avctx)
248 X264Context *x4 = avctx->priv_data;
250 x264_param_default(&x4->params);
252 x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;
254 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);
255 x4->params.rc.f_pb_factor = avctx->b_quant_factor;
256 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
257 if (x4->preset || x4->tune)
258 if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
259 av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
260 return AVERROR(EINVAL);
263 if (avctx->level > 0)
264 x4->params.i_level_idc = avctx->level;
266 x4->params.pf_log = X264_log;
267 x4->params.p_log_private = avctx;
268 x4->params.i_log_level = X264_LOG_DEBUG;
270 OPT_STR("weightp", x4->wpredp);
272 if (avctx->bit_rate) {
273 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
274 x4->params.rc.i_rc_method = X264_RC_ABR;
276 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
277 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
278 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
279 if (avctx->flags & CODEC_FLAG_PASS2) {
280 x4->params.rc.b_stat_read = 1;
282 #if FF_API_X264_GLOBAL_OPTS
284 x4->params.rc.i_rc_method = X264_RC_CRF;
285 x4->params.rc.f_rf_constant = avctx->crf;
286 x4->params.rc.f_rf_constant_max = avctx->crf_max;
287 } else if (avctx->cqp > -1) {
288 x4->params.rc.i_rc_method = X264_RC_CQP;
289 x4->params.rc.i_qp_constant = avctx->cqp;
294 x4->params.rc.i_rc_method = X264_RC_CRF;
295 x4->params.rc.f_rf_constant = x4->crf;
296 } else if (x4->cqp >= 0) {
297 x4->params.rc.i_rc_method = X264_RC_CQP;
298 x4->params.rc.i_qp_constant = x4->cqp;
301 if (x4->crf_max >= 0)
302 x4->params.rc.f_rf_constant_max = x4->crf_max;
305 OPT_STR("stats", x4->stats);
307 if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&
308 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
309 x4->params.rc.f_vbv_buffer_init =
310 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
313 OPT_STR("level", x4->level);
316 const char *p= x4->x264opts;
318 char param[256]={0}, val[256]={0};
319 sscanf(p, "%255[^:=]=%255[^:]", param, val);
326 #if FF_API_X264_GLOBAL_OPTS
327 if (avctx->aq_mode >= 0)
328 x4->params.rc.i_aq_mode = avctx->aq_mode;
329 if (avctx->aq_strength >= 0)
330 x4->params.rc.f_aq_strength = avctx->aq_strength;
331 if (avctx->psy_rd >= 0)
332 x4->params.analyse.f_psy_rd = avctx->psy_rd;
333 if (avctx->psy_trellis >= 0)
334 x4->params.analyse.f_psy_trellis = avctx->psy_trellis;
335 if (avctx->rc_lookahead >= 0)
336 x4->params.rc.i_lookahead = avctx->rc_lookahead;
337 if (avctx->weighted_p_pred >= 0)
338 x4->params.analyse.i_weighted_pred = avctx->weighted_p_pred;
339 if (avctx->bframebias)
340 x4->params.i_bframe_bias = avctx->bframebias;
341 if (avctx->deblockalpha)
342 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
343 if (avctx->deblockbeta)
344 x4->params.i_deblocking_filter_beta = avctx->deblockbeta;
345 if (avctx->complexityblur >= 0)
346 x4->params.rc.f_complexity_blur = avctx->complexityblur;
347 if (avctx->directpred >= 0)
348 x4->params.analyse.i_direct_mv_pred = avctx->directpred;
349 if (avctx->partitions) {
350 if (avctx->partitions & X264_PART_I4X4)
351 x4->params.analyse.inter |= X264_ANALYSE_I4x4;
352 if (avctx->partitions & X264_PART_I8X8)
353 x4->params.analyse.inter |= X264_ANALYSE_I8x8;
354 if (avctx->partitions & X264_PART_P8X8)
355 x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
356 if (avctx->partitions & X264_PART_P4X4)
357 x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
358 if (avctx->partitions & X264_PART_B8X8)
359 x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
361 x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
362 x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;
363 x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
364 x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
365 x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
366 x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT;
367 x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
368 x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD;
369 x4->params.analyse.b_psy = avctx->flags2 & CODEC_FLAG2_PSY;
370 x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
373 if (avctx->me_method == ME_EPZS)
374 x4->params.analyse.i_me_method = X264_ME_DIA;
375 else if (avctx->me_method == ME_HEX)
376 x4->params.analyse.i_me_method = X264_ME_HEX;
377 else if (avctx->me_method == ME_UMH)
378 x4->params.analyse.i_me_method = X264_ME_UMH;
379 else if (avctx->me_method == ME_FULL)
380 x4->params.analyse.i_me_method = X264_ME_ESA;
381 else if (avctx->me_method == ME_TESA)
382 x4->params.analyse.i_me_method = X264_ME_TESA;
384 if (avctx->gop_size >= 0)
385 x4->params.i_keyint_max = avctx->gop_size;
386 if (avctx->max_b_frames >= 0)
387 x4->params.i_bframe = avctx->max_b_frames;
388 if (avctx->scenechange_threshold >= 0)
389 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
390 if (avctx->qmin >= 0)
391 x4->params.rc.i_qp_min = avctx->qmin;
392 if (avctx->qmax >= 0)
393 x4->params.rc.i_qp_max = avctx->qmax;
394 if (avctx->max_qdiff >= 0)
395 x4->params.rc.i_qp_step = avctx->max_qdiff;
396 if (avctx->qblur >= 0)
397 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
398 if (avctx->qcompress >= 0)
399 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
400 if (avctx->refs >= 0)
401 x4->params.i_frame_reference = avctx->refs;
402 if (avctx->trellis >= 0)
403 x4->params.analyse.i_trellis = avctx->trellis;
404 if (avctx->me_range >= 0)
405 x4->params.analyse.i_me_range = avctx->me_range;
406 if (avctx->noise_reduction >= 0)
407 x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
408 if (avctx->me_subpel_quality >= 0)
409 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
410 if (avctx->b_frame_strategy >= 0)
411 x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
412 if (avctx->keyint_min >= 0)
413 x4->params.i_keyint_min = avctx->keyint_min;
414 if (avctx->coder_type >= 0)
415 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
416 if (avctx->me_cmp >= 0)
417 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
419 if (x4->aq_mode >= 0)
420 x4->params.rc.i_aq_mode = x4->aq_mode;
421 if (x4->aq_strength >= 0)
422 x4->params.rc.f_aq_strength = x4->aq_strength;
423 PARSE_X264_OPT("psy-rd", psy_rd);
424 PARSE_X264_OPT("deblock", deblock);
425 PARSE_X264_OPT("partitions", partitions);
427 x4->params.analyse.b_psy = x4->psy;
428 if (x4->rc_lookahead >= 0)
429 x4->params.rc.i_lookahead = x4->rc_lookahead;
430 if (x4->weightp >= 0)
431 x4->params.analyse.i_weighted_pred = x4->weightp;
432 if (x4->weightb >= 0)
433 x4->params.analyse.b_weighted_bipred = x4->weightb;
434 if (x4->cplxblur >= 0)
435 x4->params.rc.f_complexity_blur = x4->cplxblur;
438 x4->params.analyse.b_ssim = x4->ssim;
439 if (x4->intra_refresh >= 0)
440 x4->params.b_intra_refresh = x4->intra_refresh;
441 if (x4->b_bias != INT_MIN)
442 x4->params.i_bframe_bias = x4->b_bias;
443 if (x4->b_pyramid >= 0)
444 x4->params.i_bframe_pyramid = x4->b_pyramid;
445 if (x4->mixed_refs >= 0)
446 x4->params.analyse.b_mixed_references = x4->mixed_refs;
448 x4->params.analyse.b_transform_8x8 = x4->dct8x8;
449 if (x4->fast_pskip >= 0)
450 x4->params.analyse.b_fast_pskip = x4->fast_pskip;
452 x4->params.b_aud = x4->aud;
454 x4->params.rc.b_mb_tree = x4->mbtree;
455 if (x4->direct_pred >= 0)
456 x4->params.analyse.i_direct_mv_pred = x4->direct_pred;
458 if (x4->fastfirstpass)
459 x264_param_apply_fastfirstpass(&x4->params);
462 if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
463 av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
464 return AVERROR(EINVAL);
467 x4->params.i_width = avctx->width;
468 x4->params.i_height = avctx->height;
469 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
470 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
471 x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
472 x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
474 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
476 x4->params.i_threads = avctx->thread_count;
478 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
480 // x4->params.b_open_gop = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
482 x4->params.i_slice_count = avctx->slices;
484 x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;
486 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
487 x4->params.b_repeat_headers = 0;
489 // update AVCodecContext with x264 parameters
490 avctx->has_b_frames = x4->params.i_bframe ?
491 x4->params.i_bframe_pyramid ? 2 : 1 : 0;
492 avctx->bit_rate = x4->params.rc.i_bitrate*1000;
493 #if FF_API_X264_GLOBAL_OPTS
494 avctx->crf = x4->params.rc.f_rf_constant;
497 x4->enc = x264_encoder_open(&x4->params);
501 avctx->coded_frame = &x4->out_pic;
503 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
507 s = x264_encoder_headers(x4->enc, &nal, &nnal);
509 for (i = 0; i < nnal; i++)
510 if (nal[i].i_type == NAL_SEI)
511 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
513 avctx->extradata = av_malloc(s);
514 avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
520 #define OFFSET(x) offsetof(X264Context, x)
521 #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},
561 { "partitions", "A comma-separated list of partitions to consider. "
562 "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
563 { "direct-pred", "Direct MV prediction mode", OFFSET(direct_pred), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "direct-pred" },
564 { "none", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_NONE }, 0, 0, VE, "direct-pred" },
565 { "spatial", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_SPATIAL }, 0, 0, VE, "direct-pred" },
566 { "temporal", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
567 { "auto", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_AUTO }, 0, 0, VE, "direct-pred" },
571 static const AVClass class = {
572 .class_name = "libx264",
573 .item_name = av_default_item_name,
575 .version = LIBAVUTIL_VERSION_INT,
578 static const AVCodecDefault x264_defaults[] = {
588 { "sc_threshold", "-1" },
591 { "me_range", "-1" },
592 { "me_method", "-1" },
594 { "b_strategy", "-1" },
595 { "keyint_min", "-1" },
598 { "threads", AV_STRINGIFY(X264_THREADS_AUTO) },
602 AVCodec ff_libx264_encoder = {
604 .type = AVMEDIA_TYPE_VIDEO,
606 .priv_data_size = sizeof(X264Context),
608 .encode = X264_frame,
610 .capabilities = CODEC_CAP_DELAY,
611 .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_YUVJ420P, PIX_FMT_NONE },
612 .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
613 .priv_class = &class,
614 .defaults = x264_defaults,