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_num_planes(int avfmt)
133 case PIX_FMT_YUV420P:
134 case PIX_FMT_YUVJ420P:
135 case PIX_FMT_YUV420P9:
136 case PIX_FMT_YUV420P10:
137 case PIX_FMT_YUV444P:
149 static int X264_frame(AVCodecContext *ctx, uint8_t *buf,
150 int orig_bufsize, void *data)
152 X264Context *x4 = ctx->priv_data;
153 AVFrame *frame = data;
156 x264_picture_t pic_out;
159 x264_picture_init( &x4->pic );
160 x4->pic.img.i_csp = x4->params.i_csp;
161 if (x264_bit_depth > 8)
162 x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;
163 x4->pic.img.i_plane = avfmt2_num_planes(ctx->pix_fmt);
166 for (i = 0; i < x4->pic.img.i_plane; i++) {
167 x4->pic.img.plane[i] = frame->data[i];
168 x4->pic.img.i_stride[i] = frame->linesize[i];
171 x4->pic.i_pts = frame->pts;
173 frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
174 frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
175 frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
177 if (x4->params.b_tff != frame->top_field_first) {
178 x4->params.b_tff = frame->top_field_first;
179 x264_encoder_reconfig(x4->enc, &x4->params);
181 if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den
182 || x4->params.vui.i_sar_width != ctx->sample_aspect_ratio.num) {
183 x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;
184 x4->params.vui.i_sar_width = ctx->sample_aspect_ratio.num;
185 x264_encoder_reconfig(x4->enc, &x4->params);
190 bufsize = orig_bufsize;
191 if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
194 bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
197 } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc));
199 /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */
200 x4->out_pic.pts = pic_out.i_pts;
202 switch (pic_out.i_type) {
205 x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
208 x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
212 x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
216 x4->out_pic.key_frame = pic_out.b_keyframe;
218 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
223 static av_cold int X264_close(AVCodecContext *avctx)
225 X264Context *x4 = avctx->priv_data;
227 av_freep(&avctx->extradata);
231 x264_encoder_close(x4->enc);
236 #define OPT_STR(opt, param) \
239 if (param && (ret = x264_param_parse(&x4->params, opt, param)) < 0) { \
240 if(ret == X264_PARAM_BAD_NAME) \
241 av_log(avctx, AV_LOG_ERROR, \
242 "bad option '%s': '%s'\n", opt, param); \
244 av_log(avctx, AV_LOG_ERROR, \
245 "bad value for '%s': '%s'\n", opt, param); \
250 static int convert_pix_fmt(enum PixelFormat pix_fmt)
253 case PIX_FMT_YUV420P:
254 case PIX_FMT_YUVJ420P:
255 case PIX_FMT_YUV420P9:
256 case PIX_FMT_YUV420P10: return X264_CSP_I420;
257 case PIX_FMT_YUV422P:
258 case PIX_FMT_YUV422P10: return X264_CSP_I422;
259 case PIX_FMT_YUV444P:
260 case PIX_FMT_YUV444P9:
261 case PIX_FMT_YUV444P10: return X264_CSP_I444;
273 #define PARSE_X264_OPT(name, var)\
274 if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
275 av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
276 return AVERROR(EINVAL);\
279 static av_cold int X264_init(AVCodecContext *avctx)
281 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;
303 x4->params.i_csp = convert_pix_fmt(avctx->pix_fmt);
305 OPT_STR("weightp", x4->wpredp);
307 if (avctx->bit_rate) {
308 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
309 x4->params.rc.i_rc_method = X264_RC_ABR;
311 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
312 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
313 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
314 if (avctx->flags & CODEC_FLAG_PASS2) {
315 x4->params.rc.b_stat_read = 1;
317 #if FF_API_X264_GLOBAL_OPTS
319 x4->params.rc.i_rc_method = X264_RC_CRF;
320 x4->params.rc.f_rf_constant = avctx->crf;
321 x4->params.rc.f_rf_constant_max = avctx->crf_max;
322 } else if (avctx->cqp > -1) {
323 x4->params.rc.i_rc_method = X264_RC_CQP;
324 x4->params.rc.i_qp_constant = avctx->cqp;
329 x4->params.rc.i_rc_method = X264_RC_CRF;
330 x4->params.rc.f_rf_constant = x4->crf;
331 } else if (x4->cqp >= 0) {
332 x4->params.rc.i_rc_method = X264_RC_CQP;
333 x4->params.rc.i_qp_constant = x4->cqp;
336 if (x4->crf_max >= 0)
337 x4->params.rc.f_rf_constant_max = x4->crf_max;
340 OPT_STR("stats", x4->stats);
342 if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&
343 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
344 x4->params.rc.f_vbv_buffer_init =
345 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
348 OPT_STR("level", x4->level);
351 const char *p= x4->x264opts;
353 char param[256]={0}, val[256]={0};
354 if(sscanf(p, "%255[^:=]=%255[^:]", param, val) == 1){
363 #if FF_API_X264_GLOBAL_OPTS
364 if (avctx->aq_mode >= 0)
365 x4->params.rc.i_aq_mode = avctx->aq_mode;
366 if (avctx->aq_strength >= 0)
367 x4->params.rc.f_aq_strength = avctx->aq_strength;
368 if (avctx->psy_rd >= 0)
369 x4->params.analyse.f_psy_rd = avctx->psy_rd;
370 if (avctx->psy_trellis >= 0)
371 x4->params.analyse.f_psy_trellis = avctx->psy_trellis;
372 if (avctx->rc_lookahead >= 0)
373 x4->params.rc.i_lookahead = avctx->rc_lookahead;
374 if (avctx->weighted_p_pred >= 0)
375 x4->params.analyse.i_weighted_pred = avctx->weighted_p_pred;
376 if (avctx->bframebias)
377 x4->params.i_bframe_bias = avctx->bframebias;
378 if (avctx->deblockalpha)
379 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
380 if (avctx->deblockbeta)
381 x4->params.i_deblocking_filter_beta = avctx->deblockbeta;
382 if (avctx->complexityblur >= 0)
383 x4->params.rc.f_complexity_blur = avctx->complexityblur;
384 if (avctx->directpred >= 0)
385 x4->params.analyse.i_direct_mv_pred = avctx->directpred;
386 if (avctx->partitions) {
387 if (avctx->partitions & X264_PART_I4X4)
388 x4->params.analyse.inter |= X264_ANALYSE_I4x4;
389 if (avctx->partitions & X264_PART_I8X8)
390 x4->params.analyse.inter |= X264_ANALYSE_I8x8;
391 if (avctx->partitions & X264_PART_P8X8)
392 x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
393 if (avctx->partitions & X264_PART_P4X4)
394 x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
395 if (avctx->partitions & X264_PART_B8X8)
396 x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
399 x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
400 x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;
401 x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
402 x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
403 x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
404 x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT;
405 x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
406 x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD;
407 x4->params.analyse.b_psy = avctx->flags2 & CODEC_FLAG2_PSY;
408 x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
412 if (avctx->me_method == ME_EPZS)
413 x4->params.analyse.i_me_method = X264_ME_DIA;
414 else if (avctx->me_method == ME_HEX)
415 x4->params.analyse.i_me_method = X264_ME_HEX;
416 else if (avctx->me_method == ME_UMH)
417 x4->params.analyse.i_me_method = X264_ME_UMH;
418 else if (avctx->me_method == ME_FULL)
419 x4->params.analyse.i_me_method = X264_ME_ESA;
420 else if (avctx->me_method == ME_TESA)
421 x4->params.analyse.i_me_method = X264_ME_TESA;
423 if (avctx->gop_size >= 0)
424 x4->params.i_keyint_max = avctx->gop_size;
425 if (avctx->max_b_frames >= 0)
426 x4->params.i_bframe = avctx->max_b_frames;
427 if (avctx->scenechange_threshold >= 0)
428 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
429 if (avctx->qmin >= 0)
430 x4->params.rc.i_qp_min = avctx->qmin;
431 if (avctx->qmax >= 0)
432 x4->params.rc.i_qp_max = avctx->qmax;
433 if (avctx->max_qdiff >= 0)
434 x4->params.rc.i_qp_step = avctx->max_qdiff;
435 if (avctx->qblur >= 0)
436 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
437 if (avctx->qcompress >= 0)
438 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
439 if (avctx->refs >= 0)
440 x4->params.i_frame_reference = avctx->refs;
441 if (avctx->trellis >= 0)
442 x4->params.analyse.i_trellis = avctx->trellis;
443 if (avctx->me_range >= 0)
444 x4->params.analyse.i_me_range = avctx->me_range;
445 if (avctx->noise_reduction >= 0)
446 x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
447 if (avctx->me_subpel_quality >= 0)
448 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
449 if (avctx->b_frame_strategy >= 0)
450 x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
451 if (avctx->keyint_min >= 0)
452 x4->params.i_keyint_min = avctx->keyint_min;
453 if (avctx->coder_type >= 0)
454 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
455 if (avctx->me_cmp >= 0)
456 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
458 if (x4->aq_mode >= 0)
459 x4->params.rc.i_aq_mode = x4->aq_mode;
460 if (x4->aq_strength >= 0)
461 x4->params.rc.f_aq_strength = x4->aq_strength;
462 PARSE_X264_OPT("psy-rd", psy_rd);
463 PARSE_X264_OPT("deblock", deblock);
464 PARSE_X264_OPT("partitions", partitions);
466 x4->params.analyse.b_psy = x4->psy;
467 if (x4->rc_lookahead >= 0)
468 x4->params.rc.i_lookahead = x4->rc_lookahead;
469 if (x4->weightp >= 0)
470 x4->params.analyse.i_weighted_pred = x4->weightp;
471 if (x4->weightb >= 0)
472 x4->params.analyse.b_weighted_bipred = x4->weightb;
473 if (x4->cplxblur >= 0)
474 x4->params.rc.f_complexity_blur = x4->cplxblur;
477 x4->params.analyse.b_ssim = x4->ssim;
478 if (x4->intra_refresh >= 0)
479 x4->params.b_intra_refresh = x4->intra_refresh;
480 if (x4->b_bias != INT_MIN)
481 x4->params.i_bframe_bias = x4->b_bias;
482 if (x4->b_pyramid >= 0)
483 x4->params.i_bframe_pyramid = x4->b_pyramid;
484 if (x4->mixed_refs >= 0)
485 x4->params.analyse.b_mixed_references = x4->mixed_refs;
487 x4->params.analyse.b_transform_8x8 = x4->dct8x8;
488 if (x4->fast_pskip >= 0)
489 x4->params.analyse.b_fast_pskip = x4->fast_pskip;
491 x4->params.b_aud = x4->aud;
493 x4->params.rc.b_mb_tree = x4->mbtree;
494 if (x4->direct_pred >= 0)
495 x4->params.analyse.i_direct_mv_pred = x4->direct_pred;
497 if (x4->slice_max_size >= 0)
498 x4->params.i_slice_max_size = x4->slice_max_size;
500 if (x4->fastfirstpass)
501 x264_param_apply_fastfirstpass(&x4->params);
504 if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
505 av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
506 return AVERROR(EINVAL);
509 x4->params.i_width = avctx->width;
510 x4->params.i_height = avctx->height;
511 av_reduce(&sw, &sh, avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 4096);
512 x4->params.vui.i_sar_width = sw;
513 x4->params.vui.i_sar_height = sh;
514 x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
515 x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
517 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
519 x4->params.i_threads = avctx->thread_count;
521 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
523 // x4->params.b_open_gop = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
525 x4->params.i_slice_count = avctx->slices;
527 x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;
529 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
530 x4->params.b_repeat_headers = 0;
532 // update AVCodecContext with x264 parameters
533 avctx->has_b_frames = x4->params.i_bframe ?
534 x4->params.i_bframe_pyramid ? 2 : 1 : 0;
535 avctx->bit_rate = x4->params.rc.i_bitrate*1000;
536 #if FF_API_X264_GLOBAL_OPTS
537 avctx->crf = x4->params.rc.f_rf_constant;
540 x4->enc = x264_encoder_open(&x4->params);
544 avctx->coded_frame = &x4->out_pic;
546 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
550 s = x264_encoder_headers(x4->enc, &nal, &nnal);
552 for (i = 0; i < nnal; i++)
553 if (nal[i].i_type == NAL_SEI)
554 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
556 avctx->extradata = av_malloc(s);
557 avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
563 static const enum PixelFormat pix_fmts_8bit[] = {
570 static const enum PixelFormat pix_fmts_9bit[] = {
575 static const enum PixelFormat pix_fmts_10bit[] = {
581 static const enum PixelFormat pix_fmts_8bit_rgb[] = {
589 static av_cold void X264_init_static(AVCodec *codec)
591 if (x264_bit_depth == 8)
592 codec->pix_fmts = pix_fmts_8bit;
593 else if (x264_bit_depth == 9)
594 codec->pix_fmts = pix_fmts_9bit;
595 else if (x264_bit_depth == 10)
596 codec->pix_fmts = pix_fmts_10bit;
599 #define OFFSET(x) offsetof(X264Context, x)
600 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
601 static const AVOption options[] = {
602 { "preset", "Set the encoding preset (cf. x264 --fullhelp)", OFFSET(preset), AV_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
603 { "tune", "Tune the encoding params (cf. x264 --fullhelp)", OFFSET(tune), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
604 { "profile", "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
605 { "fastfirstpass", "Use fast settings when encoding first pass", OFFSET(fastfirstpass), AV_OPT_TYPE_INT, { 1 }, 0, 1, VE},
606 {"level", "Specify level (as defined by Annex A)", OFFSET(level), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
607 {"passlogfile", "Filename for 2 pass stats", OFFSET(stats), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
608 {"wpredp", "Weighted prediction for P-frames", OFFSET(wpredp), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
609 {"x264opts", "x264 options", OFFSET(x264opts), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
610 { "crf", "Select the quality for constant quality mode", OFFSET(crf), AV_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE },
611 { "crf_max", "In CRF mode, prevents VBV from lowering quality beyond this point.",OFFSET(crf_max), AV_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE },
612 { "qp", "Constant quantization parameter rate control method",OFFSET(cqp), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
613 { "aq-mode", "AQ method", OFFSET(aq_mode), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "aq_mode"},
614 { "none", NULL, 0, AV_OPT_TYPE_CONST, {X264_AQ_NONE}, INT_MIN, INT_MAX, VE, "aq_mode" },
615 { "variance", "Variance AQ (complexity mask)", 0, AV_OPT_TYPE_CONST, {X264_AQ_VARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
616 { "autovariance", "Auto-variance AQ (experimental)", 0, AV_OPT_TYPE_CONST, {X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
617 { "aq-strength", "AQ strength. Reduces blocking and blurring in flat and textured areas.", OFFSET(aq_strength), AV_OPT_TYPE_FLOAT, {-1}, -1, FLT_MAX, VE},
618 { "psy", "Use psychovisual optimizations.", OFFSET(psy), AV_OPT_TYPE_INT, {-1 }, -1, 1, VE },
619 { "psy-rd", "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), AV_OPT_TYPE_STRING, {0 }, 0, 0, VE},
620 { "rc-lookahead", "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
621 { "weightb", "Weighted prediction for B-frames.", OFFSET(weightb), AV_OPT_TYPE_INT, {-1 }, -1, 1, VE },
622 { "weightp", "Weighted prediction analysis method.", OFFSET(weightp), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "weightp" },
623 { "none", NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_NONE}, INT_MIN, INT_MAX, VE, "weightp" },
624 { "simple", NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
625 { "smart", NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_SMART}, INT_MIN, INT_MAX, VE, "weightp" },
626 { "ssim", "Calculate and print SSIM stats.", OFFSET(ssim), AV_OPT_TYPE_INT, {-1 }, -1, 1, VE },
627 { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),AV_OPT_TYPE_INT, {-1 }, -1, 1, VE },
628 { "b-bias", "Influences how often B-frames are used", OFFSET(b_bias), AV_OPT_TYPE_INT, {INT_MIN}, INT_MIN, INT_MAX, VE },
629 { "b-pyramid", "Keep some B-frames as references.", OFFSET(b_pyramid), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "b_pyramid" },
630 { "none", NULL, 0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_NONE}, INT_MIN, INT_MAX, VE, "b_pyramid" },
631 { "strict", "Strictly hierarchical pyramid", 0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
632 { "normal", "Non-strict (not Blu-ray compatible)", 0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
633 { "mixed-refs", "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_INT, {-1}, -1, 1, VE },
634 { "8x8dct", "High profile 8x8 transform.", OFFSET(dct8x8), AV_OPT_TYPE_INT, {-1 }, -1, 1, VE},
635 { "fast-pskip", NULL, OFFSET(fast_pskip), AV_OPT_TYPE_INT, {-1 }, -1, 1, VE},
636 { "aud", "Use access unit delimiters.", OFFSET(aud), AV_OPT_TYPE_INT, {-1 }, -1, 1, VE},
637 { "mbtree", "Use macroblock tree ratecontrol.", OFFSET(mbtree), AV_OPT_TYPE_INT, {-1 }, -1, 1, VE},
638 { "deblock", "Loop filter parameters, in <alpha:beta> form.", OFFSET(deblock), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
639 { "cplxblur", "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE},
640 { "partitions", "A comma-separated list of partitions to consider. "
641 "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
642 { "direct-pred", "Direct MV prediction mode", OFFSET(direct_pred), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE, "direct-pred" },
643 { "none", NULL, 0, AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_NONE }, 0, 0, VE, "direct-pred" },
644 { "spatial", NULL, 0, AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_SPATIAL }, 0, 0, VE, "direct-pred" },
645 { "temporal", NULL, 0, AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
646 { "auto", NULL, 0, AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_AUTO }, 0, 0, VE, "direct-pred" },
647 { "slice-max-size","Constant quantization parameter rate control method",OFFSET(slice_max_size), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
651 static const AVClass class = {
652 .class_name = "libx264",
653 .item_name = av_default_item_name,
655 .version = LIBAVUTIL_VERSION_INT,
658 static const AVClass rgbclass = {
659 .class_name = "libx264rgb",
660 .item_name = av_default_item_name,
662 .version = LIBAVUTIL_VERSION_INT,
665 static const AVCodecDefault x264_defaults[] = {
675 { "rc_lookahead", "-1" },
677 { "sc_threshold", "-1" },
680 { "me_range", "-1" },
681 { "me_method", "-1" },
683 { "b_strategy", "-1" },
684 { "keyint_min", "-1" },
687 { "threads", AV_STRINGIFY(X264_THREADS_AUTO) },
691 AVCodec ff_libx264_encoder = {
693 .type = AVMEDIA_TYPE_VIDEO,
695 .priv_data_size = sizeof(X264Context),
697 .encode = X264_frame,
699 .capabilities = CODEC_CAP_DELAY,
700 .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
701 .priv_class = &class,
702 .defaults = x264_defaults,
703 .init_static_data = X264_init_static,
706 AVCodec ff_libx264rgb_encoder = {
707 .name = "libx264rgb",
708 .type = AVMEDIA_TYPE_VIDEO,
710 .priv_data_size = sizeof(X264Context),
712 .encode = X264_frame,
714 .capabilities = CODEC_CAP_DELAY,
715 .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB"),
716 .priv_class = &rgbclass,
717 .defaults = x264_defaults,
718 .pix_fmts = pix_fmts_8bit_rgb,