2 * H.264 encoding using the x264 library
3 * Copyright (C) 2005 Mans Rullgard <mans@mansr.com>
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/internal.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/mem.h"
25 #include "libavutil/pixdesc.h"
35 typedef struct X264Context {
74 static void X264_log(void *p, int level, const char *fmt, va_list args)
76 static const int level_map[] = {
77 [X264_LOG_ERROR] = AV_LOG_ERROR,
78 [X264_LOG_WARNING] = AV_LOG_WARNING,
79 [X264_LOG_INFO] = AV_LOG_INFO,
80 [X264_LOG_DEBUG] = AV_LOG_DEBUG
83 if (level < 0 || level > X264_LOG_DEBUG)
86 av_vlog(p, level_map[level], fmt, args);
90 static int encode_nals(AVCodecContext *ctx, AVPacket *pkt,
91 x264_nal_t *nals, int nnal)
93 X264Context *x4 = ctx->priv_data;
95 int i, size = x4->sei_size, ret;
100 for (i = 0; i < nnal; i++)
101 size += nals[i].i_payload;
103 if ((ret = ff_alloc_packet(pkt, size)) < 0)
108 /* Write the SEI as part of the first frame. */
109 if (x4->sei_size > 0 && nnal > 0) {
110 memcpy(p, x4->sei, x4->sei_size);
115 for (i = 0; i < nnal; i++){
116 memcpy(p, nals[i].p_payload, nals[i].i_payload);
117 p += nals[i].i_payload;
123 static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
126 X264Context *x4 = ctx->priv_data;
129 x264_picture_t pic_out;
131 x264_picture_init( &x4->pic );
132 x4->pic.img.i_csp = x4->params.i_csp;
133 if (x264_bit_depth > 8)
134 x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;
135 x4->pic.img.i_plane = 3;
138 for (i = 0; i < 3; i++) {
139 x4->pic.img.plane[i] = frame->data[i];
140 x4->pic.img.i_stride[i] = frame->linesize[i];
143 x4->pic.i_pts = frame->pts;
145 frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
146 frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
147 frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
149 if (x4->params.b_tff != frame->top_field_first) {
150 x4->params.b_tff = frame->top_field_first;
151 x264_encoder_reconfig(x4->enc, &x4->params);
153 if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den ||
154 x4->params.vui.i_sar_width != ctx->sample_aspect_ratio.num) {
155 x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;
156 x4->params.vui.i_sar_width = ctx->sample_aspect_ratio.num;
157 x264_encoder_reconfig(x4->enc, &x4->params);
162 if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
165 ret = encode_nals(ctx, pkt, nal, nnal);
168 } while (!ret && !frame && x264_encoder_delayed_frames(x4->enc));
170 pkt->pts = pic_out.i_pts;
171 pkt->dts = pic_out.i_dts;
173 switch (pic_out.i_type) {
176 x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
179 x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
183 x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
187 pkt->flags |= AV_PKT_FLAG_KEY*pic_out.b_keyframe;
189 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
195 static av_cold int X264_close(AVCodecContext *avctx)
197 X264Context *x4 = avctx->priv_data;
199 av_freep(&avctx->extradata);
203 x264_encoder_close(x4->enc);
208 static int convert_pix_fmt(enum PixelFormat pix_fmt)
211 case PIX_FMT_YUV420P:
212 case PIX_FMT_YUVJ420P:
213 case PIX_FMT_YUV420P9:
214 case PIX_FMT_YUV420P10: return X264_CSP_I420;
215 case PIX_FMT_YUV422P:
216 case PIX_FMT_YUV422P10: return X264_CSP_I422;
217 case PIX_FMT_YUV444P:
218 case PIX_FMT_YUV444P9:
219 case PIX_FMT_YUV444P10: return X264_CSP_I444;
224 #define PARSE_X264_OPT(name, var)\
225 if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
226 av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
227 return AVERROR(EINVAL);\
230 static av_cold int X264_init(AVCodecContext *avctx)
232 X264Context *x4 = avctx->priv_data;
234 x264_param_default(&x4->params);
236 x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;
238 if (x4->preset || x4->tune)
239 if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
240 av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
241 return AVERROR(EINVAL);
244 if (avctx->level > 0)
245 x4->params.i_level_idc = avctx->level;
247 x4->params.pf_log = X264_log;
248 x4->params.p_log_private = avctx;
249 x4->params.i_log_level = X264_LOG_DEBUG;
250 x4->params.i_csp = convert_pix_fmt(avctx->pix_fmt);
252 if (avctx->bit_rate) {
253 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
254 x4->params.rc.i_rc_method = X264_RC_ABR;
256 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
257 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
258 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
259 if (avctx->flags & CODEC_FLAG_PASS2) {
260 x4->params.rc.b_stat_read = 1;
263 x4->params.rc.i_rc_method = X264_RC_CRF;
264 x4->params.rc.f_rf_constant = x4->crf;
265 } else if (x4->cqp >= 0) {
266 x4->params.rc.i_rc_method = X264_RC_CQP;
267 x4->params.rc.i_qp_constant = x4->cqp;
270 if (x4->crf_max >= 0)
271 x4->params.rc.f_rf_constant_max = x4->crf_max;
274 if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&
275 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
276 x4->params.rc.f_vbv_buffer_init =
277 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
280 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);
281 x4->params.rc.f_pb_factor = avctx->b_quant_factor;
282 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
284 if (avctx->me_method == ME_EPZS)
285 x4->params.analyse.i_me_method = X264_ME_DIA;
286 else if (avctx->me_method == ME_HEX)
287 x4->params.analyse.i_me_method = X264_ME_HEX;
288 else if (avctx->me_method == ME_UMH)
289 x4->params.analyse.i_me_method = X264_ME_UMH;
290 else if (avctx->me_method == ME_FULL)
291 x4->params.analyse.i_me_method = X264_ME_ESA;
292 else if (avctx->me_method == ME_TESA)
293 x4->params.analyse.i_me_method = X264_ME_TESA;
295 if (avctx->gop_size >= 0)
296 x4->params.i_keyint_max = avctx->gop_size;
297 if (avctx->max_b_frames >= 0)
298 x4->params.i_bframe = avctx->max_b_frames;
299 if (avctx->scenechange_threshold >= 0)
300 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
301 if (avctx->qmin >= 0)
302 x4->params.rc.i_qp_min = avctx->qmin;
303 if (avctx->qmax >= 0)
304 x4->params.rc.i_qp_max = avctx->qmax;
305 if (avctx->max_qdiff >= 0)
306 x4->params.rc.i_qp_step = avctx->max_qdiff;
307 if (avctx->qblur >= 0)
308 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
309 if (avctx->qcompress >= 0)
310 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
311 if (avctx->refs >= 0)
312 x4->params.i_frame_reference = avctx->refs;
313 if (avctx->trellis >= 0)
314 x4->params.analyse.i_trellis = avctx->trellis;
315 if (avctx->me_range >= 0)
316 x4->params.analyse.i_me_range = avctx->me_range;
317 if (avctx->noise_reduction >= 0)
318 x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
319 if (avctx->me_subpel_quality >= 0)
320 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
321 if (avctx->b_frame_strategy >= 0)
322 x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
323 if (avctx->keyint_min >= 0)
324 x4->params.i_keyint_min = avctx->keyint_min;
325 if (avctx->coder_type >= 0)
326 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
327 if (avctx->me_cmp >= 0)
328 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
330 if (x4->aq_mode >= 0)
331 x4->params.rc.i_aq_mode = x4->aq_mode;
332 if (x4->aq_strength >= 0)
333 x4->params.rc.f_aq_strength = x4->aq_strength;
334 PARSE_X264_OPT("psy-rd", psy_rd);
335 PARSE_X264_OPT("deblock", deblock);
336 PARSE_X264_OPT("partitions", partitions);
337 PARSE_X264_OPT("stats", stats);
339 x4->params.analyse.b_psy = x4->psy;
340 if (x4->rc_lookahead >= 0)
341 x4->params.rc.i_lookahead = x4->rc_lookahead;
342 if (x4->weightp >= 0)
343 x4->params.analyse.i_weighted_pred = x4->weightp;
344 if (x4->weightb >= 0)
345 x4->params.analyse.b_weighted_bipred = x4->weightb;
346 if (x4->cplxblur >= 0)
347 x4->params.rc.f_complexity_blur = x4->cplxblur;
350 x4->params.analyse.b_ssim = x4->ssim;
351 if (x4->intra_refresh >= 0)
352 x4->params.b_intra_refresh = x4->intra_refresh;
353 if (x4->b_bias != INT_MIN)
354 x4->params.i_bframe_bias = x4->b_bias;
355 if (x4->b_pyramid >= 0)
356 x4->params.i_bframe_pyramid = x4->b_pyramid;
357 if (x4->mixed_refs >= 0)
358 x4->params.analyse.b_mixed_references = x4->mixed_refs;
360 x4->params.analyse.b_transform_8x8 = x4->dct8x8;
361 if (x4->fast_pskip >= 0)
362 x4->params.analyse.b_fast_pskip = x4->fast_pskip;
364 x4->params.b_aud = x4->aud;
366 x4->params.rc.b_mb_tree = x4->mbtree;
367 if (x4->direct_pred >= 0)
368 x4->params.analyse.i_direct_mv_pred = x4->direct_pred;
370 if (x4->slice_max_size >= 0)
371 x4->params.i_slice_max_size = x4->slice_max_size;
373 if (x4->fastfirstpass)
374 x264_param_apply_fastfirstpass(&x4->params);
377 if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
378 av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
379 return AVERROR(EINVAL);
382 x4->params.i_width = avctx->width;
383 x4->params.i_height = avctx->height;
384 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
385 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
386 x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
387 x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
389 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
391 x4->params.i_threads = avctx->thread_count;
392 if (avctx->thread_type)
393 x4->params.b_sliced_threads = avctx->thread_type == FF_THREAD_SLICE;
395 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
397 x4->params.b_open_gop = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
399 x4->params.i_slice_count = avctx->slices;
401 x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;
403 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
404 x4->params.b_repeat_headers = 0;
406 // update AVCodecContext with x264 parameters
407 avctx->has_b_frames = x4->params.i_bframe ?
408 x4->params.i_bframe_pyramid ? 2 : 1 : 0;
409 if (avctx->max_b_frames < 0)
410 avctx->max_b_frames = 0;
412 avctx->bit_rate = x4->params.rc.i_bitrate*1000;
414 x4->enc = x264_encoder_open(&x4->params);
418 avctx->coded_frame = &x4->out_pic;
420 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
425 s = x264_encoder_headers(x4->enc, &nal, &nnal);
426 avctx->extradata = p = av_malloc(s);
428 for (i = 0; i < nnal; i++) {
429 /* Don't put the SEI in extradata. */
430 if (nal[i].i_type == NAL_SEI) {
431 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
432 x4->sei_size = nal[i].i_payload;
433 x4->sei = av_malloc(x4->sei_size);
434 memcpy(x4->sei, nal[i].p_payload, nal[i].i_payload);
437 memcpy(p, nal[i].p_payload, nal[i].i_payload);
438 p += nal[i].i_payload;
440 avctx->extradata_size = p - avctx->extradata;
446 static const enum PixelFormat pix_fmts_8bit[] = {
453 static const enum PixelFormat pix_fmts_9bit[] = {
458 static const enum PixelFormat pix_fmts_10bit[] = {
465 static av_cold void X264_init_static(AVCodec *codec)
467 if (x264_bit_depth == 8)
468 codec->pix_fmts = pix_fmts_8bit;
469 else if (x264_bit_depth == 9)
470 codec->pix_fmts = pix_fmts_9bit;
471 else if (x264_bit_depth == 10)
472 codec->pix_fmts = pix_fmts_10bit;
475 #define OFFSET(x) offsetof(X264Context, x)
476 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
477 static const AVOption options[] = {
478 { "preset", "Set the encoding preset (cf. x264 --fullhelp)", OFFSET(preset), AV_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
479 { "tune", "Tune the encoding params (cf. x264 --fullhelp)", OFFSET(tune), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
480 { "profile", "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
481 { "fastfirstpass", "Use fast settings when encoding first pass", OFFSET(fastfirstpass), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE},
482 { "crf", "Select the quality for constant quality mode", OFFSET(crf), AV_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE },
483 { "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 },
484 { "qp", "Constant quantization parameter rate control method",OFFSET(cqp), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, VE },
485 { "aq-mode", "AQ method", OFFSET(aq_mode), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, VE, "aq_mode"},
486 { "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_NONE}, INT_MIN, INT_MAX, VE, "aq_mode" },
487 { "variance", "Variance AQ (complexity mask)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_VARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
488 { "autovariance", "Auto-variance AQ (experimental)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
489 { "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},
490 { "psy", "Use psychovisual optimizations.", OFFSET(psy), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },
491 { "psy-rd", "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), AV_OPT_TYPE_STRING, {0 }, 0, 0, VE},
492 { "rc-lookahead", "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, VE },
493 { "weightb", "Weighted prediction for B-frames.", OFFSET(weightb), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },
494 { "weightp", "Weighted prediction analysis method.", OFFSET(weightp), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, VE, "weightp" },
495 { "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_NONE}, INT_MIN, INT_MAX, VE, "weightp" },
496 { "simple", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
497 { "smart", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_SMART}, INT_MIN, INT_MAX, VE, "weightp" },
498 { "ssim", "Calculate and print SSIM stats.", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },
499 { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE },
500 { "b-bias", "Influences how often B-frames are used", OFFSET(b_bias), AV_OPT_TYPE_INT, { .i64 = INT_MIN}, INT_MIN, INT_MAX, VE },
501 { "b-pyramid", "Keep some B-frames as references.", OFFSET(b_pyramid), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, VE, "b_pyramid" },
502 { "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_NONE}, INT_MIN, INT_MAX, VE, "b_pyramid" },
503 { "strict", "Strictly hierarchical pyramid", 0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
504 { "normal", "Non-strict (not Blu-ray compatible)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
505 { "mixed-refs", "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 1, VE },
506 { "8x8dct", "High profile 8x8 transform.", OFFSET(dct8x8), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE},
507 { "fast-pskip", NULL, OFFSET(fast_pskip), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE},
508 { "aud", "Use access unit delimiters.", OFFSET(aud), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE},
509 { "mbtree", "Use macroblock tree ratecontrol.", OFFSET(mbtree), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE},
510 { "deblock", "Loop filter parameters, in <alpha:beta> form.", OFFSET(deblock), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
511 { "cplxblur", "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE},
512 { "partitions", "A comma-separated list of partitions to consider. "
513 "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
514 { "direct-pred", "Direct MV prediction mode", OFFSET(direct_pred), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, VE, "direct-pred" },
515 { "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_NONE }, 0, 0, VE, "direct-pred" },
516 { "spatial", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_SPATIAL }, 0, 0, VE, "direct-pred" },
517 { "temporal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
518 { "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_AUTO }, 0, 0, VE, "direct-pred" },
519 { "slice-max-size","Limit the size of each slice in bytes", OFFSET(slice_max_size),AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, VE },
520 { "stats", "Filename for 2 pass stats", OFFSET(stats), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
524 static const AVClass class = {
525 .class_name = "libx264",
526 .item_name = av_default_item_name,
528 .version = LIBAVUTIL_VERSION_INT,
531 static const AVCodecDefault x264_defaults[] = {
541 { "sc_threshold", "-1" },
544 { "me_range", "-1" },
545 { "me_method", "-1" },
547 { "b_strategy", "-1" },
548 { "keyint_min", "-1" },
551 { "threads", AV_STRINGIFY(X264_THREADS_AUTO) },
552 { "thread_type", "0" },
556 AVCodec ff_libx264_encoder = {
558 .type = AVMEDIA_TYPE_VIDEO,
559 .id = AV_CODEC_ID_H264,
560 .priv_data_size = sizeof(X264Context),
562 .encode2 = X264_frame,
564 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
565 .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
566 .priv_class = &class,
567 .defaults = x264_defaults,
568 .init_static_data = X264_init_static,