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 X264_frame(AVCodecContext *ctx, uint8_t *buf,
131 int orig_bufsize, void *data)
133 X264Context *x4 = ctx->priv_data;
134 AVFrame *frame = data;
137 x264_picture_t pic_out;
140 x264_picture_init( &x4->pic );
141 x4->pic.img.i_csp = X264_CSP_I420;
142 if (x264_bit_depth > 8)
143 x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;
144 x4->pic.img.i_plane = 3;
147 for (i = 0; i < 3; i++) {
148 x4->pic.img.plane[i] = frame->data[i];
149 x4->pic.img.i_stride[i] = frame->linesize[i];
152 x4->pic.i_pts = frame->pts;
154 frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
155 frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
156 frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
158 if (x4->params.b_tff != frame->top_field_first) {
159 x4->params.b_tff = frame->top_field_first;
160 x264_encoder_reconfig(x4->enc, &x4->params);
162 if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den
163 || x4->params.vui.i_sar_width != ctx->sample_aspect_ratio.num) {
164 x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;
165 x4->params.vui.i_sar_width = ctx->sample_aspect_ratio.num;
166 x264_encoder_reconfig(x4->enc, &x4->params);
171 bufsize = orig_bufsize;
172 if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
175 bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
178 } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc));
180 /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */
181 x4->out_pic.pts = pic_out.i_pts;
183 switch (pic_out.i_type) {
186 x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
189 x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
193 x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
197 x4->out_pic.key_frame = pic_out.b_keyframe;
199 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
204 static av_cold int X264_close(AVCodecContext *avctx)
206 X264Context *x4 = avctx->priv_data;
208 av_freep(&avctx->extradata);
212 x264_encoder_close(x4->enc);
217 #define OPT_STR(opt, param) \
220 if (param && (ret = x264_param_parse(&x4->params, opt, param)) < 0) { \
221 if(ret == X264_PARAM_BAD_NAME) \
222 av_log(avctx, AV_LOG_ERROR, \
223 "bad option '%s': '%s'\n", opt, param); \
225 av_log(avctx, AV_LOG_ERROR, \
226 "bad value for '%s': '%s'\n", opt, param); \
231 #define PARSE_X264_OPT(name, var)\
232 if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
233 av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
234 return AVERROR(EINVAL);\
237 static av_cold int X264_init(AVCodecContext *avctx)
239 X264Context *x4 = avctx->priv_data;
241 x264_param_default(&x4->params);
243 x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;
245 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);
246 x4->params.rc.f_pb_factor = avctx->b_quant_factor;
247 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
248 if (x4->preset || x4->tune)
249 if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
250 av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
251 return AVERROR(EINVAL);
254 if (avctx->level > 0)
255 x4->params.i_level_idc = avctx->level;
257 x4->params.pf_log = X264_log;
258 x4->params.p_log_private = avctx;
259 x4->params.i_log_level = X264_LOG_DEBUG;
261 OPT_STR("weightp", x4->wpredp);
263 if (avctx->bit_rate) {
264 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
265 x4->params.rc.i_rc_method = X264_RC_ABR;
267 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
268 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
269 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
270 if (avctx->flags & CODEC_FLAG_PASS2) {
271 x4->params.rc.b_stat_read = 1;
273 #if FF_API_X264_GLOBAL_OPTS
275 x4->params.rc.i_rc_method = X264_RC_CRF;
276 x4->params.rc.f_rf_constant = avctx->crf;
277 x4->params.rc.f_rf_constant_max = avctx->crf_max;
278 } else if (avctx->cqp > -1) {
279 x4->params.rc.i_rc_method = X264_RC_CQP;
280 x4->params.rc.i_qp_constant = avctx->cqp;
285 x4->params.rc.i_rc_method = X264_RC_CRF;
286 x4->params.rc.f_rf_constant = x4->crf;
287 } else if (x4->cqp >= 0) {
288 x4->params.rc.i_rc_method = X264_RC_CQP;
289 x4->params.rc.i_qp_constant = x4->cqp;
292 if (x4->crf_max >= 0)
293 x4->params.rc.f_rf_constant_max = x4->crf_max;
296 OPT_STR("stats", x4->stats);
298 if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&
299 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
300 x4->params.rc.f_vbv_buffer_init =
301 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
304 OPT_STR("level", x4->level);
307 const char *p= x4->x264opts;
309 char param[256]={0}, val[256]={0};
310 sscanf(p, "%255[^:=]=%255[^:]", param, val);
317 #if FF_API_X264_GLOBAL_OPTS
318 if (avctx->aq_mode >= 0)
319 x4->params.rc.i_aq_mode = avctx->aq_mode;
320 if (avctx->aq_strength >= 0)
321 x4->params.rc.f_aq_strength = avctx->aq_strength;
322 if (avctx->psy_rd >= 0)
323 x4->params.analyse.f_psy_rd = avctx->psy_rd;
324 if (avctx->psy_trellis >= 0)
325 x4->params.analyse.f_psy_trellis = avctx->psy_trellis;
326 if (avctx->rc_lookahead >= 0)
327 x4->params.rc.i_lookahead = avctx->rc_lookahead;
328 if (avctx->weighted_p_pred >= 0)
329 x4->params.analyse.i_weighted_pred = avctx->weighted_p_pred;
330 if (avctx->bframebias)
331 x4->params.i_bframe_bias = avctx->bframebias;
332 if (avctx->deblockalpha)
333 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
334 if (avctx->deblockbeta)
335 x4->params.i_deblocking_filter_beta = avctx->deblockbeta;
336 if (avctx->complexityblur >= 0)
337 x4->params.rc.f_complexity_blur = avctx->complexityblur;
338 if (avctx->directpred >= 0)
339 x4->params.analyse.i_direct_mv_pred = avctx->directpred;
340 if (avctx->partitions) {
341 if (avctx->partitions & X264_PART_I4X4)
342 x4->params.analyse.inter |= X264_ANALYSE_I4x4;
343 if (avctx->partitions & X264_PART_I8X8)
344 x4->params.analyse.inter |= X264_ANALYSE_I8x8;
345 if (avctx->partitions & X264_PART_P8X8)
346 x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
347 if (avctx->partitions & X264_PART_P4X4)
348 x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
349 if (avctx->partitions & X264_PART_B8X8)
350 x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
353 x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
354 x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;
355 x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
356 x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
357 x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
358 x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT;
359 x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
360 x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD;
361 x4->params.analyse.b_psy = avctx->flags2 & CODEC_FLAG2_PSY;
362 x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
366 if (avctx->me_method == ME_EPZS)
367 x4->params.analyse.i_me_method = X264_ME_DIA;
368 else if (avctx->me_method == ME_HEX)
369 x4->params.analyse.i_me_method = X264_ME_HEX;
370 else if (avctx->me_method == ME_UMH)
371 x4->params.analyse.i_me_method = X264_ME_UMH;
372 else if (avctx->me_method == ME_FULL)
373 x4->params.analyse.i_me_method = X264_ME_ESA;
374 else if (avctx->me_method == ME_TESA)
375 x4->params.analyse.i_me_method = X264_ME_TESA;
377 if (avctx->gop_size >= 0)
378 x4->params.i_keyint_max = avctx->gop_size;
379 if (avctx->max_b_frames >= 0)
380 x4->params.i_bframe = avctx->max_b_frames;
381 if (avctx->scenechange_threshold >= 0)
382 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
383 if (avctx->qmin >= 0)
384 x4->params.rc.i_qp_min = avctx->qmin;
385 if (avctx->qmax >= 0)
386 x4->params.rc.i_qp_max = avctx->qmax;
387 if (avctx->max_qdiff >= 0)
388 x4->params.rc.i_qp_step = avctx->max_qdiff;
389 if (avctx->qblur >= 0)
390 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
391 if (avctx->qcompress >= 0)
392 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
393 if (avctx->refs >= 0)
394 x4->params.i_frame_reference = avctx->refs;
395 if (avctx->trellis >= 0)
396 x4->params.analyse.i_trellis = avctx->trellis;
397 if (avctx->me_range >= 0)
398 x4->params.analyse.i_me_range = avctx->me_range;
399 if (avctx->noise_reduction >= 0)
400 x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
401 if (avctx->me_subpel_quality >= 0)
402 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
403 if (avctx->b_frame_strategy >= 0)
404 x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
405 if (avctx->keyint_min >= 0)
406 x4->params.i_keyint_min = avctx->keyint_min;
407 if (avctx->coder_type >= 0)
408 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
409 if (avctx->me_cmp >= 0)
410 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
412 if (x4->aq_mode >= 0)
413 x4->params.rc.i_aq_mode = x4->aq_mode;
414 if (x4->aq_strength >= 0)
415 x4->params.rc.f_aq_strength = x4->aq_strength;
416 PARSE_X264_OPT("psy-rd", psy_rd);
417 PARSE_X264_OPT("deblock", deblock);
418 PARSE_X264_OPT("partitions", partitions);
420 x4->params.analyse.b_psy = x4->psy;
421 if (x4->rc_lookahead >= 0)
422 x4->params.rc.i_lookahead = x4->rc_lookahead;
423 if (x4->weightp >= 0)
424 x4->params.analyse.i_weighted_pred = x4->weightp;
425 if (x4->weightb >= 0)
426 x4->params.analyse.b_weighted_bipred = x4->weightb;
427 if (x4->cplxblur >= 0)
428 x4->params.rc.f_complexity_blur = x4->cplxblur;
431 x4->params.analyse.b_ssim = x4->ssim;
432 if (x4->intra_refresh >= 0)
433 x4->params.b_intra_refresh = x4->intra_refresh;
434 if (x4->b_bias != INT_MIN)
435 x4->params.i_bframe_bias = x4->b_bias;
436 if (x4->b_pyramid >= 0)
437 x4->params.i_bframe_pyramid = x4->b_pyramid;
438 if (x4->mixed_refs >= 0)
439 x4->params.analyse.b_mixed_references = x4->mixed_refs;
441 x4->params.analyse.b_transform_8x8 = x4->dct8x8;
442 if (x4->fast_pskip >= 0)
443 x4->params.analyse.b_fast_pskip = x4->fast_pskip;
445 x4->params.b_aud = x4->aud;
447 x4->params.rc.b_mb_tree = x4->mbtree;
448 if (x4->direct_pred >= 0)
449 x4->params.analyse.i_direct_mv_pred = x4->direct_pred;
451 if (x4->slice_max_size >= 0)
452 x4->params.i_slice_max_size = x4->slice_max_size;
454 if (x4->fastfirstpass)
455 x264_param_apply_fastfirstpass(&x4->params);
458 if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
459 av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
460 return AVERROR(EINVAL);
463 x4->params.i_width = avctx->width;
464 x4->params.i_height = avctx->height;
465 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
466 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
467 x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
468 x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
470 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
472 x4->params.i_threads = avctx->thread_count;
474 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
476 // x4->params.b_open_gop = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
478 x4->params.i_slice_count = avctx->slices;
480 x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;
482 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
483 x4->params.b_repeat_headers = 0;
485 // update AVCodecContext with x264 parameters
486 avctx->has_b_frames = x4->params.i_bframe ?
487 x4->params.i_bframe_pyramid ? 2 : 1 : 0;
488 avctx->bit_rate = x4->params.rc.i_bitrate*1000;
489 #if FF_API_X264_GLOBAL_OPTS
490 avctx->crf = x4->params.rc.f_rf_constant;
493 x4->enc = x264_encoder_open(&x4->params);
497 avctx->coded_frame = &x4->out_pic;
499 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
503 s = x264_encoder_headers(x4->enc, &nal, &nnal);
505 for (i = 0; i < nnal; i++)
506 if (nal[i].i_type == NAL_SEI)
507 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
509 avctx->extradata = av_malloc(s);
510 avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
516 static const enum PixelFormat pix_fmts_8bit[] = {
521 static const enum PixelFormat pix_fmts_9bit[] = {
525 static const enum PixelFormat pix_fmts_10bit[] = {
530 static av_cold void X264_init_static(AVCodec *codec)
532 if (x264_bit_depth == 8)
533 codec->pix_fmts = pix_fmts_8bit;
534 else if (x264_bit_depth == 9)
535 codec->pix_fmts = pix_fmts_9bit;
536 else if (x264_bit_depth == 10)
537 codec->pix_fmts = pix_fmts_10bit;
540 #define OFFSET(x) offsetof(X264Context, x)
541 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
542 static const AVOption options[] = {
543 { "preset", "Set the encoding preset (cf. x264 --fullhelp)", OFFSET(preset), FF_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
544 { "tune", "Tune the encoding params (cf. x264 --fullhelp)", OFFSET(tune), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
545 { "profile", "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
546 { "fastfirstpass", "Use fast settings when encoding first pass", OFFSET(fastfirstpass), FF_OPT_TYPE_INT, { 1 }, 0, 1, VE},
547 {"level", "Specify level (as defined by Annex A)", OFFSET(level), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
548 {"passlogfile", "Filename for 2 pass stats", OFFSET(stats), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
549 {"wpredp", "Weighted prediction for P-frames", OFFSET(wpredp), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
550 {"x264opts", "x264 options", OFFSET(x264opts), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
551 { "crf", "Select the quality for constant quality mode", OFFSET(crf), FF_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE },
552 { "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 },
553 { "qp", "Constant quantization parameter rate control method",OFFSET(cqp), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
554 { "aq-mode", "AQ method", OFFSET(aq_mode), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "aq_mode"},
555 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_AQ_NONE}, INT_MIN, INT_MAX, VE, "aq_mode" },
556 { "variance", "Variance AQ (complexity mask)", 0, FF_OPT_TYPE_CONST, {X264_AQ_VARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
557 { "autovariance", "Auto-variance AQ (experimental)", 0, FF_OPT_TYPE_CONST, {X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
558 { "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},
559 { "psy", "Use psychovisual optimizations.", OFFSET(psy), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
560 { "psy-rd", "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), FF_OPT_TYPE_STRING, {0 }, 0, 0, VE},
561 { "rc-lookahead", "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
562 { "weightb", "Weighted prediction for B-frames.", OFFSET(weightb), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
563 { "weightp", "Weighted prediction analysis method.", OFFSET(weightp), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "weightp" },
564 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_NONE}, INT_MIN, INT_MAX, VE, "weightp" },
565 { "simple", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
566 { "smart", NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SMART}, INT_MIN, INT_MAX, VE, "weightp" },
567 { "ssim", "Calculate and print SSIM stats.", OFFSET(ssim), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
568 { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),FF_OPT_TYPE_INT, {-1 }, -1, 1, VE },
569 { "b-bias", "Influences how often B-frames are used", OFFSET(b_bias), FF_OPT_TYPE_INT, {INT_MIN}, INT_MIN, INT_MAX, VE },
570 { "b-pyramid", "Keep some B-frames as references.", OFFSET(b_pyramid), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "b_pyramid" },
571 { "none", NULL, 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_NONE}, INT_MIN, INT_MAX, VE, "b_pyramid" },
572 { "strict", "Strictly hierarchical pyramid", 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
573 { "normal", "Non-strict (not Blu-ray compatible)", 0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
574 { "mixed-refs", "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), FF_OPT_TYPE_INT, {-1}, -1, 1, VE },
575 { "8x8dct", "High profile 8x8 transform.", OFFSET(dct8x8), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
576 { "fast-pskip", NULL, OFFSET(fast_pskip), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
577 { "aud", "Use access unit delimiters.", OFFSET(aud), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
578 { "mbtree", "Use macroblock tree ratecontrol.", OFFSET(mbtree), FF_OPT_TYPE_INT, {-1 }, -1, 1, VE},
579 { "deblock", "Loop filter parameters, in <alpha:beta> form.", OFFSET(deblock), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
580 { "cplxblur", "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), FF_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE},
581 { "partitions", "A comma-separated list of partitions to consider. "
582 "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
583 { "direct-pred", "Direct MV prediction mode", OFFSET(direct_pred), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "direct-pred" },
584 { "none", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_NONE }, 0, 0, VE, "direct-pred" },
585 { "spatial", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_SPATIAL }, 0, 0, VE, "direct-pred" },
586 { "temporal", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
587 { "auto", NULL, 0, FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_AUTO }, 0, 0, VE, "direct-pred" },
588 { "slice-max-size","Constant quantization parameter rate control method",OFFSET(slice_max_size), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
592 static const AVClass class = {
593 .class_name = "libx264",
594 .item_name = av_default_item_name,
596 .version = LIBAVUTIL_VERSION_INT,
599 static const AVCodecDefault x264_defaults[] = {
609 { "rc_lookahead", "-1" },
611 { "sc_threshold", "-1" },
614 { "me_range", "-1" },
615 { "me_method", "-1" },
617 { "b_strategy", "-1" },
618 { "keyint_min", "-1" },
621 { "threads", AV_STRINGIFY(X264_THREADS_AUTO) },
625 AVCodec ff_libx264_encoder = {
627 .type = AVMEDIA_TYPE_VIDEO,
629 .priv_data_size = sizeof(X264Context),
631 .encode = X264_frame,
633 .capabilities = CODEC_CAP_DELAY,
634 .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
635 .priv_class = &class,
636 .defaults = x264_defaults,
637 .init_static_data = X264_init_static,