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"
23 #include "libavutil/pixdesc.h"
33 typedef struct X264Context {
75 static void X264_log(void *p, int level, const char *fmt, va_list args)
77 static const int level_map[] = {
78 [X264_LOG_ERROR] = AV_LOG_ERROR,
79 [X264_LOG_WARNING] = AV_LOG_WARNING,
80 [X264_LOG_INFO] = AV_LOG_INFO,
81 [X264_LOG_DEBUG] = AV_LOG_DEBUG
84 if (level < 0 || level > X264_LOG_DEBUG)
87 av_vlog(p, level_map[level], fmt, args);
91 static int encode_nals(AVCodecContext *ctx, uint8_t *buf, int size,
92 x264_nal_t *nals, int nnal, int skip_sei)
94 X264Context *x4 = ctx->priv_data;
98 /* Write the SEI as part of the first frame. */
99 if (x4->sei_size > 0 && nnal > 0) {
100 if (x4->sei_size > size) {
101 av_log(ctx, AV_LOG_ERROR, "Error: nal buffer is too small\n");
104 memcpy(p, x4->sei, x4->sei_size);
110 for (i = 0; i < nnal; i++){
111 /* Don't put the SEI in extradata. */
112 if (skip_sei && nals[i].i_type == NAL_SEI) {
113 x4->sei_size = nals[i].i_payload;
114 x4->sei = av_malloc(x4->sei_size);
115 memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload);
118 if (nals[i].i_payload > (size - (p - buf))) {
119 // return only complete nals which fit in buf
120 av_log(ctx, AV_LOG_ERROR, "Error: nal buffer is too small\n");
123 memcpy(p, nals[i].p_payload, nals[i].i_payload);
124 p += nals[i].i_payload;
130 static int avfmt2_csp(int avfmt)
133 case PIX_FMT_YUV420P:
134 case PIX_FMT_YUVJ420P:
135 case PIX_FMT_YUV420P9:
136 case PIX_FMT_YUV420P10:
137 return X264_CSP_I420;
139 case PIX_FMT_YUV444P:
140 return X264_CSP_I444;
150 return X264_CSP_NONE;
154 static int avfmt2_num_planes(int avfmt)
157 case PIX_FMT_YUV420P:
158 case PIX_FMT_YUVJ420P:
159 case PIX_FMT_YUV420P9:
160 case PIX_FMT_YUV420P10:
161 case PIX_FMT_YUV444P:
173 static int X264_frame(AVCodecContext *ctx, uint8_t *buf,
174 int orig_bufsize, void *data)
176 X264Context *x4 = ctx->priv_data;
177 AVFrame *frame = data;
180 x264_picture_t pic_out;
183 x264_picture_init( &x4->pic );
184 x4->pic.img.i_csp = avfmt2_csp(ctx->pix_fmt);
185 if (x264_bit_depth > 8)
186 x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;
187 x4->pic.img.i_plane = avfmt2_num_planes(ctx->pix_fmt);
190 for (i = 0; i < x4->pic.img.i_plane; i++) {
191 x4->pic.img.plane[i] = frame->data[i];
192 x4->pic.img.i_stride[i] = frame->linesize[i];
195 x4->pic.i_pts = frame->pts;
197 frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
198 frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
199 frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
201 if (x4->params.b_tff != frame->top_field_first) {
202 x4->params.b_tff = frame->top_field_first;
203 x264_encoder_reconfig(x4->enc, &x4->params);
205 if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den
206 || x4->params.vui.i_sar_width != ctx->sample_aspect_ratio.num) {
207 x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;
208 x4->params.vui.i_sar_width = ctx->sample_aspect_ratio.num;
209 x264_encoder_reconfig(x4->enc, &x4->params);
214 bufsize = orig_bufsize;
215 if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
218 bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
221 } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc));
223 /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */
224 x4->out_pic.pts = pic_out.i_pts;
226 switch (pic_out.i_type) {
229 x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
232 x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
236 x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
240 x4->out_pic.key_frame = pic_out.b_keyframe;
242 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
247 static av_cold int X264_close(AVCodecContext *avctx)
249 X264Context *x4 = avctx->priv_data;
251 av_freep(&avctx->extradata);
255 x264_encoder_close(x4->enc);
260 #define OPT_STR(opt, param) \
263 if (param && (ret = x264_param_parse(&x4->params, opt, param)) < 0) { \
264 if(ret == X264_PARAM_BAD_NAME) \
265 av_log(avctx, AV_LOG_ERROR, \
266 "bad option '%s': '%s'\n", opt, param); \
268 av_log(avctx, AV_LOG_ERROR, \
269 "bad value for '%s': '%s'\n", opt, param); \
274 #define PARSE_X264_OPT(name, var)\
275 if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
276 av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
277 return AVERROR(EINVAL);\
280 static av_cold int X264_init(AVCodecContext *avctx)
282 X264Context *x4 = avctx->priv_data;
284 x264_param_default(&x4->params);
286 x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;
288 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);
289 x4->params.rc.f_pb_factor = avctx->b_quant_factor;
290 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
291 if (x4->preset || x4->tune)
292 if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
293 av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
294 return AVERROR(EINVAL);
297 if (avctx->level > 0)
298 x4->params.i_level_idc = avctx->level;
300 x4->params.pf_log = X264_log;
301 x4->params.p_log_private = avctx;
302 x4->params.i_log_level = X264_LOG_DEBUG;
304 OPT_STR("weightp", x4->wpredp);
306 if (avctx->bit_rate) {
307 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
308 x4->params.rc.i_rc_method = X264_RC_ABR;
310 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
311 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
312 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
313 if (avctx->flags & CODEC_FLAG_PASS2) {
314 x4->params.rc.b_stat_read = 1;
316 #if FF_API_X264_GLOBAL_OPTS
318 x4->params.rc.i_rc_method = X264_RC_CRF;
319 x4->params.rc.f_rf_constant = avctx->crf;
320 x4->params.rc.f_rf_constant_max = avctx->crf_max;
321 } else if (avctx->cqp > -1) {
322 x4->params.rc.i_rc_method = X264_RC_CQP;
323 x4->params.rc.i_qp_constant = avctx->cqp;
328 x4->params.rc.i_rc_method = X264_RC_CRF;
329 x4->params.rc.f_rf_constant = x4->crf;
330 } else if (x4->cqp >= 0) {
331 x4->params.rc.i_rc_method = X264_RC_CQP;
332 x4->params.rc.i_qp_constant = x4->cqp;
335 if (x4->crf_max >= 0)
336 x4->params.rc.f_rf_constant_max = x4->crf_max;
339 OPT_STR("stats", x4->stats);
341 if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&
342 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
343 x4->params.rc.f_vbv_buffer_init =
344 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
347 OPT_STR("level", x4->level);
350 const char *p= x4->x264opts;
352 char param[256]={0}, val[256]={0};
353 sscanf(p, "%255[^:=]=%255[^:]", param, val);
360 #if FF_API_X264_GLOBAL_OPTS
361 if (avctx->aq_mode >= 0)
362 x4->params.rc.i_aq_mode = avctx->aq_mode;
363 if (avctx->aq_strength >= 0)
364 x4->params.rc.f_aq_strength = avctx->aq_strength;
365 if (avctx->psy_rd >= 0)
366 x4->params.analyse.f_psy_rd = avctx->psy_rd;
367 if (avctx->psy_trellis >= 0)
368 x4->params.analyse.f_psy_trellis = avctx->psy_trellis;
369 if (avctx->rc_lookahead >= 0)
370 x4->params.rc.i_lookahead = avctx->rc_lookahead;
371 if (avctx->weighted_p_pred >= 0)
372 x4->params.analyse.i_weighted_pred = avctx->weighted_p_pred;
373 if (avctx->bframebias)
374 x4->params.i_bframe_bias = avctx->bframebias;
375 if (avctx->deblockalpha)
376 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
377 if (avctx->deblockbeta)
378 x4->params.i_deblocking_filter_beta = avctx->deblockbeta;
379 if (avctx->complexityblur >= 0)
380 x4->params.rc.f_complexity_blur = avctx->complexityblur;
381 if (avctx->directpred >= 0)
382 x4->params.analyse.i_direct_mv_pred = avctx->directpred;
383 if (avctx->partitions) {
384 if (avctx->partitions & X264_PART_I4X4)
385 x4->params.analyse.inter |= X264_ANALYSE_I4x4;
386 if (avctx->partitions & X264_PART_I8X8)
387 x4->params.analyse.inter |= X264_ANALYSE_I8x8;
388 if (avctx->partitions & X264_PART_P8X8)
389 x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
390 if (avctx->partitions & X264_PART_P4X4)
391 x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
392 if (avctx->partitions & X264_PART_B8X8)
393 x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
396 x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
397 x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;
398 x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
399 x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
400 x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
401 x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT;
402 x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
403 x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD;
404 x4->params.analyse.b_psy = avctx->flags2 & CODEC_FLAG2_PSY;
405 x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
409 if (avctx->me_method == ME_EPZS)
410 x4->params.analyse.i_me_method = X264_ME_DIA;
411 else if (avctx->me_method == ME_HEX)
412 x4->params.analyse.i_me_method = X264_ME_HEX;
413 else if (avctx->me_method == ME_UMH)
414 x4->params.analyse.i_me_method = X264_ME_UMH;
415 else if (avctx->me_method == ME_FULL)
416 x4->params.analyse.i_me_method = X264_ME_ESA;
417 else if (avctx->me_method == ME_TESA)
418 x4->params.analyse.i_me_method = X264_ME_TESA;
420 if (avctx->gop_size >= 0)
421 x4->params.i_keyint_max = avctx->gop_size;
422 if (avctx->max_b_frames >= 0)
423 x4->params.i_bframe = avctx->max_b_frames;
424 if (avctx->scenechange_threshold >= 0)
425 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
426 if (avctx->qmin >= 0)
427 x4->params.rc.i_qp_min = avctx->qmin;
428 if (avctx->qmax >= 0)
429 x4->params.rc.i_qp_max = avctx->qmax;
430 if (avctx->max_qdiff >= 0)
431 x4->params.rc.i_qp_step = avctx->max_qdiff;
432 if (avctx->qblur >= 0)
433 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
434 if (avctx->qcompress >= 0)
435 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
436 if (avctx->refs >= 0)
437 x4->params.i_frame_reference = avctx->refs;
438 if (avctx->trellis >= 0)
439 x4->params.analyse.i_trellis = avctx->trellis;
440 if (avctx->me_range >= 0)
441 x4->params.analyse.i_me_range = avctx->me_range;
442 if (avctx->noise_reduction >= 0)
443 x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
444 if (avctx->me_subpel_quality >= 0)
445 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
446 if (avctx->b_frame_strategy >= 0)
447 x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
448 if (avctx->keyint_min >= 0)
449 x4->params.i_keyint_min = avctx->keyint_min;
450 if (avctx->coder_type >= 0)
451 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
452 if (avctx->me_cmp >= 0)
453 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
455 if (x4->aq_mode >= 0)
456 x4->params.rc.i_aq_mode = x4->aq_mode;
457 if (x4->aq_strength >= 0)
458 x4->params.rc.f_aq_strength = x4->aq_strength;
459 PARSE_X264_OPT("psy-rd", psy_rd);
460 PARSE_X264_OPT("deblock", deblock);
461 PARSE_X264_OPT("partitions", partitions);
463 x4->params.analyse.b_psy = x4->psy;
464 if (x4->rc_lookahead >= 0)
465 x4->params.rc.i_lookahead = x4->rc_lookahead;
466 if (x4->weightp >= 0)
467 x4->params.analyse.i_weighted_pred = x4->weightp;
468 if (x4->weightb >= 0)
469 x4->params.analyse.b_weighted_bipred = x4->weightb;
470 if (x4->cplxblur >= 0)
471 x4->params.rc.f_complexity_blur = x4->cplxblur;
474 x4->params.analyse.b_ssim = x4->ssim;
475 if (x4->intra_refresh >= 0)
476 x4->params.b_intra_refresh = x4->intra_refresh;
477 if (x4->b_bias != INT_MIN)
478 x4->params.i_bframe_bias = x4->b_bias;
479 if (x4->b_pyramid >= 0)
480 x4->params.i_bframe_pyramid = x4->b_pyramid;
481 if (x4->mixed_refs >= 0)
482 x4->params.analyse.b_mixed_references = x4->mixed_refs;
484 x4->params.analyse.b_transform_8x8 = x4->dct8x8;
485 if (x4->fast_pskip >= 0)
486 x4->params.analyse.b_fast_pskip = x4->fast_pskip;
488 x4->params.b_aud = x4->aud;
490 x4->params.rc.b_mb_tree = x4->mbtree;
491 if (x4->direct_pred >= 0)
492 x4->params.analyse.i_direct_mv_pred = x4->direct_pred;
494 if (x4->slice_max_size >= 0)
495 x4->params.i_slice_max_size = x4->slice_max_size;
497 if (x4->fastfirstpass)
498 x264_param_apply_fastfirstpass(&x4->params);
501 if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
502 av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
503 return AVERROR(EINVAL);
506 x4->params.i_width = avctx->width;
507 x4->params.i_height = avctx->height;
508 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
509 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
510 x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
511 x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
513 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
515 x4->params.i_threads = avctx->thread_count;
517 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
519 // x4->params.b_open_gop = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
521 x4->params.i_slice_count = avctx->slices;
523 x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;
525 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
526 x4->params.b_repeat_headers = 0;
528 // update AVCodecContext with x264 parameters
529 avctx->has_b_frames = x4->params.i_bframe ?
530 x4->params.i_bframe_pyramid ? 2 : 1 : 0;
531 avctx->bit_rate = x4->params.rc.i_bitrate*1000;
532 #if FF_API_X264_GLOBAL_OPTS
533 avctx->crf = x4->params.rc.f_rf_constant;
536 x4->params.i_csp = avfmt2_csp(avctx->pix_fmt);
538 x4->enc = x264_encoder_open(&x4->params);
542 avctx->coded_frame = &x4->out_pic;
544 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
548 s = x264_encoder_headers(x4->enc, &nal, &nnal);
550 for (i = 0; i < nnal; i++)
551 if (nal[i].i_type == NAL_SEI)
552 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
554 avctx->extradata = av_malloc(s);
555 avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
561 static const enum PixelFormat pix_fmts_8bit[] = {
573 static const enum PixelFormat pix_fmts_9bit[] = {
577 static const enum PixelFormat pix_fmts_10bit[] = {
582 static av_cold void X264_init_static(AVCodec *codec)
584 if (x264_bit_depth == 8)
585 codec->pix_fmts = pix_fmts_8bit;
586 else if (x264_bit_depth == 9)
587 codec->pix_fmts = pix_fmts_9bit;
588 else if (x264_bit_depth == 10)
589 codec->pix_fmts = pix_fmts_10bit;
592 #define OFFSET(x) offsetof(X264Context, x)
593 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
594 static const AVOption options[] = {
595 { "preset", "Set the encoding preset (cf. x264 --fullhelp)", OFFSET(preset), FF_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
596 { "tune", "Tune the encoding params (cf. x264 --fullhelp)", OFFSET(tune), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
597 { "profile", "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
598 { "fastfirstpass", "Use fast settings when encoding first pass", OFFSET(fastfirstpass), FF_OPT_TYPE_INT, { 1 }, 0, 1, VE},
599 {"level", "Specify level (as defined by Annex A)", OFFSET(level), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
600 {"passlogfile", "Filename for 2 pass stats", OFFSET(stats), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
601 {"wpredp", "Weighted prediction for P-frames", OFFSET(wpredp), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
602 {"x264opts", "x264 options", OFFSET(x264opts), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
603 { "crf", "Select the quality for constant quality mode", OFFSET(crf), FF_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE },
604 { "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 },
605 { "qp", "Constant quantization parameter rate control method",OFFSET(cqp), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
606 { "aq-mode", "AQ method", OFFSET(aq_mode), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "aq_mode"},
607 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_AQ_NONE}, INT_MIN, INT_MAX, VE, "aq_mode" },
608 { "variance", "Variance AQ (complexity mask)", 0, FF_OPT_TYPE_CONST, {X264_AQ_VARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
609 { "autovariance", "Auto-variance AQ (experimental)", 0, FF_OPT_TYPE_CONST, {X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
610 { "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},
611 { "psy", "Use psychovisual optimizations.", OFFSET(psy), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
612 { "psy-rd", "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), FF_OPT_TYPE_STRING, {0 }, 0, 0, VE},
613 { "rc-lookahead", "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
614 { "weightb", "Weighted prediction for B-frames.", OFFSET(weightb), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
615 { "weightp", "Weighted prediction analysis method.", OFFSET(weightp), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "weightp" },
616 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_NONE}, INT_MIN, INT_MAX, VE, "weightp" },
617 { "simple", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
618 { "smart", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SMART}, INT_MIN, INT_MAX, VE, "weightp" },
619 { "ssim", "Calculate and print SSIM stats.", OFFSET(ssim), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
620 { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
621 { "b-bias", "Influences how often B-frames are used", OFFSET(b_bias), FF_OPT_TYPE_INT, {INT_MIN}, INT_MIN, INT_MAX, VE },
622 { "b-pyramid", "Keep some B-frames as references.", OFFSET(b_pyramid), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "b_pyramid" },
623 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_NONE}, INT_MIN, INT_MAX, VE, "b_pyramid" },
624 { "strict", "Strictly hierarchical pyramid", 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
625 { "normal", "Non-strict (not Blu-ray compatible)", 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
626 { "mixed-refs", "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), FF_OPT_TYPE_INT, {-1}, -1, 1, VE },
627 { "8x8dct", "High profile 8x8 transform.", OFFSET(dct8x8), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
628 { "fast-pskip", NULL, OFFSET(fast_pskip), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
629 { "aud", "Use access unit delimiters.", OFFSET(aud), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
630 { "mbtree", "Use macroblock tree ratecontrol.", OFFSET(mbtree), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
631 { "deblock", "Loop filter parameters, in <alpha:beta> form.", OFFSET(deblock), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
632 { "cplxblur", "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), FF_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE},
633 { "partitions", "A comma-separated list of partitions to consider. "
634 "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
635 { "direct-pred", "Direct MV prediction mode", OFFSET(direct_pred), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "direct-pred" },
636 { "none", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_NONE }, 0, 0, VE, "direct-pred" },
637 { "spatial", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_SPATIAL }, 0, 0, VE, "direct-pred" },
638 { "temporal", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
639 { "auto", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_AUTO }, 0, 0, VE, "direct-pred" },
640 { "slice-max-size","Constant quantization parameter rate control method",OFFSET(slice_max_size), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
644 static const AVClass class = {
645 .class_name = "libx264",
646 .item_name = av_default_item_name,
648 .version = LIBAVUTIL_VERSION_INT,
651 static const AVCodecDefault x264_defaults[] = {
661 { "rc_lookahead", "-1" },
663 { "sc_threshold", "-1" },
666 { "me_range", "-1" },
667 { "me_method", "-1" },
669 { "b_strategy", "-1" },
670 { "keyint_min", "-1" },
673 { "threads", AV_STRINGIFY(X264_THREADS_AUTO) },
677 AVCodec ff_libx264_encoder = {
679 .type = AVMEDIA_TYPE_VIDEO,
681 .priv_data_size = sizeof(X264Context),
683 .encode = X264_frame,
685 .capabilities = CODEC_CAP_DELAY,
686 .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
687 .priv_class = &class,
688 .defaults = x264_defaults,
689 .init_static_data = X264_init_static,