/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include "ffmpeg.h" #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/avutil.h" #include "libavutil/dict.h" #include "libavutil/display.h" #include "libavutil/eval.h" #include "libavutil/frame.h" #include "libavutil/intreadwrite.h" #include "libavutil/log.h" #include "libavutil/pixdesc.h" #include "libavutil/rational.h" #include "libavutil/timestamp.h" #include "libavcodec/avcodec.h" // FIXME private header, used for mid_pred() #include "libavcodec/mathops.h" #include "libavformat/avformat.h" struct Encoder { /* predicted pts of the next frame to be encoded */ int64_t next_pts; AVFrame *last_frame; /* number of frames emitted by the video-encoding sync code */ int64_t vsync_frame_number; /* history of nb_frames_prev, i.e. the number of times the * previous frame was duplicated by vsync code in recent * do_video_out() calls */ int64_t frames_prev_hist[3]; AVFrame *sq_frame; // packet for receiving encoded output AVPacket *pkt; // combined size of all the packets received from the encoder uint64_t data_size; // number of packets received from the encoder uint64_t packets_encoded; uint64_t dup_warning; int opened; }; void enc_free(Encoder **penc) { Encoder *enc = *penc; if (!enc) return; av_frame_free(&enc->last_frame); av_frame_free(&enc->sq_frame); av_packet_free(&enc->pkt); av_freep(penc); } int enc_alloc(Encoder **penc, const AVCodec *codec) { Encoder *enc; *penc = NULL; enc = av_mallocz(sizeof(*enc)); if (!enc) return AVERROR(ENOMEM); if (codec->type == AVMEDIA_TYPE_VIDEO) { enc->last_frame = av_frame_alloc(); if (!enc->last_frame) goto fail; } enc->pkt = av_packet_alloc(); if (!enc->pkt) goto fail; enc->dup_warning = 1000; *penc = enc; return 0; fail: enc_free(&enc); return AVERROR(ENOMEM); } static int hw_device_setup_for_encode(OutputStream *ost, AVBufferRef *frames_ref) { const AVCodecHWConfig *config; HWDevice *dev = NULL; int i; if (frames_ref && ((AVHWFramesContext*)frames_ref->data)->format == ost->enc_ctx->pix_fmt) { // Matching format, will try to use hw_frames_ctx. } else { frames_ref = NULL; } for (i = 0;; i++) { config = avcodec_get_hw_config(ost->enc_ctx->codec, i); if (!config) break; if (frames_ref && config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX && (config->pix_fmt == AV_PIX_FMT_NONE || config->pix_fmt == ost->enc_ctx->pix_fmt)) { av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using input " "frames context (format %s) with %s encoder.\n", av_get_pix_fmt_name(ost->enc_ctx->pix_fmt), ost->enc_ctx->codec->name); ost->enc_ctx->hw_frames_ctx = av_buffer_ref(frames_ref); if (!ost->enc_ctx->hw_frames_ctx) return AVERROR(ENOMEM); return 0; } if (!dev && config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX) dev = hw_device_get_by_type(config->device_type); } if (dev) { av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using device %s " "(type %s) with %s encoder.\n", dev->name, av_hwdevice_get_type_name(dev->type), ost->enc_ctx->codec->name); ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref); if (!ost->enc_ctx->hw_device_ctx) return AVERROR(ENOMEM); } else { // No device required, or no device available. } return 0; } static int set_encoder_id(OutputFile *of, OutputStream *ost) { const char *cname = ost->enc_ctx->codec->name; uint8_t *encoder_string; int encoder_string_len; if (av_dict_get(ost->st->metadata, "encoder", NULL, 0)) return 0; encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(cname) + 2; encoder_string = av_mallocz(encoder_string_len); if (!encoder_string) return AVERROR(ENOMEM); if (!of->bitexact && !ost->bitexact) av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len); else av_strlcpy(encoder_string, "Lavc ", encoder_string_len); av_strlcat(encoder_string, cname, encoder_string_len); av_dict_set(&ost->st->metadata, "encoder", encoder_string, AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE); return 0; } static int enc_choose_timebase(OutputStream *ost, AVFrame *frame) { const OutputFile *of = output_files[ost->file_index]; AVCodecContext *enc = ost->enc_ctx; AVRational tb = (AVRational){ 0, 0 }; AVRational fr; FrameData *fd; if (ost->type == AVMEDIA_TYPE_SUBTITLE) { if (ost->enc_timebase.num) av_log(ost, AV_LOG_WARNING, "-enc_time_base not supported for subtitles, ignoring\n"); enc->time_base = AV_TIME_BASE_Q; return 0; } fd = frame_data(frame); // apply -enc_time_base if (ost->enc_timebase.num == ENC_TIME_BASE_DEMUX && (fd->dec.tb.num <= 0 || fd->dec.tb.den <= 0)) { av_log(ost, AV_LOG_ERROR, "Demuxing timebase not available - cannot use it for encoding\n"); return AVERROR(EINVAL); } switch (ost->enc_timebase.num) { case 0: break; case ENC_TIME_BASE_DEMUX: tb = fd->dec.tb; break; case ENC_TIME_BASE_FILTER: tb = frame->time_base; break; default: tb = ost->enc_timebase; break; } if (ost->type == AVMEDIA_TYPE_AUDIO) { enc->time_base = tb.num ? tb : (AVRational){ 1, frame->sample_rate }; return 0; } fr = ost->frame_rate; if (!fr.num) fr = fd->frame_rate_filter; if (ost->is_cfr) { if (!fr.num && !ost->max_frame_rate.num) { fr = (AVRational){25, 1}; av_log(ost, AV_LOG_WARNING, "No information " "about the input framerate is available. Falling " "back to a default value of 25fps. Use the -r option " "if you want a different framerate.\n"); } if (ost->max_frame_rate.num && (av_q2d(fr) > av_q2d(ost->max_frame_rate) || !fr.den)) fr = ost->max_frame_rate; } if (fr.num > 0) { if (enc->codec->supported_framerates && !ost->force_fps) { int idx = av_find_nearest_q_idx(fr, enc->codec->supported_framerates); fr = enc->codec->supported_framerates[idx]; } // reduce frame rate for mpeg4 to be within the spec limits if (enc->codec_id == AV_CODEC_ID_MPEG4) { av_reduce(&fr.num, &fr.den, fr.num, fr.den, 65535); } } if (av_q2d(fr) > 1e3 && ost->vsync_method != VSYNC_PASSTHROUGH && (ost->vsync_method == VSYNC_CFR || ost->vsync_method == VSYNC_VSCFR || (ost->vsync_method == VSYNC_AUTO && !(of->format->flags & AVFMT_VARIABLE_FPS)))){ av_log(ost, AV_LOG_WARNING, "Frame rate very high for a muxer not efficiently supporting it.\n" "Please consider specifying a lower framerate, a different muxer or " "setting vsync/fps_mode to vfr\n"); } enc->framerate = fr; ost->st->avg_frame_rate = fr; if (!(tb.num > 0 && tb.den > 0)) tb = av_inv_q(fr); if (!(tb.num > 0 && tb.den > 0)) tb = frame->time_base; enc->time_base = tb; return 0; } int enc_open(OutputStream *ost, AVFrame *frame) { InputStream *ist = ost->ist; Encoder *e = ost->enc; AVCodecContext *enc_ctx = ost->enc_ctx; AVCodecContext *dec_ctx = NULL; const AVCodec *enc = enc_ctx->codec; OutputFile *of = output_files[ost->file_index]; FrameData *fd; int ret; if (e->opened) return 0; // frame is always non-NULL for audio and video av_assert0(frame || (enc->type != AVMEDIA_TYPE_VIDEO && enc->type != AVMEDIA_TYPE_AUDIO)); if (frame) { fd = frame_data(frame); if (!fd) return AVERROR(ENOMEM); } ret = set_encoder_id(output_files[ost->file_index], ost); if (ret < 0) return ret; if (ist) { dec_ctx = ist->dec_ctx; } ret = enc_choose_timebase(ost, frame); if (ret < 0) { av_log(ost, AV_LOG_ERROR, "Could not choose a time base for encoding\n"); return AVERROR(EINVAL); } switch (enc_ctx->codec_type) { case AVMEDIA_TYPE_AUDIO: enc_ctx->sample_fmt = frame->format; enc_ctx->sample_rate = frame->sample_rate; ret = av_channel_layout_copy(&enc_ctx->ch_layout, &frame->ch_layout); if (ret < 0) return ret; if (ost->bits_per_raw_sample) enc_ctx->bits_per_raw_sample = ost->bits_per_raw_sample; else enc_ctx->bits_per_raw_sample = FFMIN(fd->bits_per_raw_sample, av_get_bytes_per_sample(enc_ctx->sample_fmt) << 3); break; case AVMEDIA_TYPE_VIDEO: { enc_ctx->width = frame->width; enc_ctx->height = frame->height; enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio = ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option av_mul_q(ost->frame_aspect_ratio, (AVRational){ enc_ctx->height, enc_ctx->width }) : frame->sample_aspect_ratio; enc_ctx->pix_fmt = frame->format; if (ost->bits_per_raw_sample) enc_ctx->bits_per_raw_sample = ost->bits_per_raw_sample; else enc_ctx->bits_per_raw_sample = FFMIN(fd->bits_per_raw_sample, av_pix_fmt_desc_get(enc_ctx->pix_fmt)->comp[0].depth); enc_ctx->color_range = frame->color_range; enc_ctx->color_primaries = frame->color_primaries; enc_ctx->color_trc = frame->color_trc; enc_ctx->colorspace = frame->colorspace; enc_ctx->chroma_sample_location = frame->chroma_location; if (enc_ctx->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) || (frame->flags & AV_FRAME_FLAG_INTERLACED) #if FFMPEG_OPT_TOP || ost->top_field_first >= 0 #endif ) { int top_field_first = #if FFMPEG_OPT_TOP ost->top_field_first >= 0 ? ost->top_field_first : #endif !!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST); if (enc->id == AV_CODEC_ID_MJPEG) enc_ctx->field_order = top_field_first ? AV_FIELD_TT : AV_FIELD_BB; else enc_ctx->field_order = top_field_first ? AV_FIELD_TB : AV_FIELD_BT; } else enc_ctx->field_order = AV_FIELD_PROGRESSIVE; break; } case AVMEDIA_TYPE_SUBTITLE: if (!enc_ctx->width) { enc_ctx->width = ost->ist->par->width; enc_ctx->height = ost->ist->par->height; } if (dec_ctx && dec_ctx->subtitle_header) { /* ASS code assumes this buffer is null terminated so add extra byte. */ enc_ctx->subtitle_header = av_mallocz(dec_ctx->subtitle_header_size + 1); if (!enc_ctx->subtitle_header) return AVERROR(ENOMEM); memcpy(enc_ctx->subtitle_header, dec_ctx->subtitle_header, dec_ctx->subtitle_header_size); enc_ctx->subtitle_header_size = dec_ctx->subtitle_header_size; } break; default: av_assert0(0); break; } if (ost->bitexact) enc_ctx->flags |= AV_CODEC_FLAG_BITEXACT; if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0)) av_dict_set(&ost->encoder_opts, "threads", "auto", 0); if (enc->capabilities & AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE) { ret = av_dict_set(&ost->encoder_opts, "flags", "+copy_opaque", AV_DICT_MULTIKEY); if (ret < 0) return ret; } av_dict_set(&ost->encoder_opts, "flags", "+frame_duration", AV_DICT_MULTIKEY); ret = hw_device_setup_for_encode(ost, frame ? frame->hw_frames_ctx : NULL); if (ret < 0) { av_log(ost, AV_LOG_ERROR, "Encoding hardware device setup failed: %s\n", av_err2str(ret)); return ret; } if ((ret = avcodec_open2(ost->enc_ctx, enc, &ost->encoder_opts)) < 0) { if (ret != AVERROR_EXPERIMENTAL) av_log(ost, AV_LOG_ERROR, "Error while opening encoder - maybe " "incorrect parameters such as bit_rate, rate, width or height.\n"); return ret; } e->opened = 1; if (ost->sq_idx_encode >= 0) { e->sq_frame = av_frame_alloc(); if (!e->sq_frame) return AVERROR(ENOMEM); } if (ost->enc_ctx->frame_size) { av_assert0(ost->sq_idx_encode >= 0); sq_frame_samples(output_files[ost->file_index]->sq_encode, ost->sq_idx_encode, ost->enc_ctx->frame_size); } ret = check_avoptions(ost->encoder_opts); if (ret < 0) return ret; if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000 && ost->enc_ctx->codec_id != AV_CODEC_ID_CODEC2 /* don't complain about 700 bit/s modes */) av_log(ost, AV_LOG_WARNING, "The bitrate parameter is set too low." " It takes bits/s as argument, not kbits/s\n"); ret = avcodec_parameters_from_context(ost->par_in, ost->enc_ctx); if (ret < 0) { av_log(ost, AV_LOG_FATAL, "Error initializing the output stream codec context.\n"); return ret; } /* * Add global input side data. For now this is naive, and copies it * from the input stream's global side data. All side data should * really be funneled over AVFrame and libavfilter, then added back to * packet side data, and then potentially using the first packet for * global side data. */ if (ist) { int i; for (i = 0; i < ist->st->codecpar->nb_coded_side_data; i++) { AVPacketSideData *sd_src = &ist->st->codecpar->coded_side_data[i]; if (sd_src->type != AV_PKT_DATA_CPB_PROPERTIES) { AVPacketSideData *sd_dst = av_packet_side_data_new(&ost->par_in->coded_side_data, &ost->par_in->nb_coded_side_data, sd_src->type, sd_src->size, 0); if (!sd_dst) return AVERROR(ENOMEM); memcpy(sd_dst->data, sd_src->data, sd_src->size); if (ist->autorotate && sd_src->type == AV_PKT_DATA_DISPLAYMATRIX) av_display_rotation_set((int32_t *)sd_dst->data, 0); } } } // copy timebase while removing common factors if (ost->st->time_base.num <= 0 || ost->st->time_base.den <= 0) ost->st->time_base = av_add_q(ost->enc_ctx->time_base, (AVRational){0, 1}); ret = of_stream_init(of, ost); if (ret < 0) return ret; return 0; } static int check_recording_time(OutputStream *ost, int64_t ts, AVRational tb) { OutputFile *of = output_files[ost->file_index]; if (of->recording_time != INT64_MAX && av_compare_ts(ts, tb, of->recording_time, AV_TIME_BASE_Q) >= 0) { close_output_stream(ost); return 0; } return 1; } int enc_subtitle(OutputFile *of, OutputStream *ost, const AVSubtitle *sub) { Encoder *e = ost->enc; int subtitle_out_max_size = 1024 * 1024; int subtitle_out_size, nb, i, ret; AVCodecContext *enc; AVPacket *pkt = e->pkt; int64_t pts; if (sub->pts == AV_NOPTS_VALUE) { av_log(ost, AV_LOG_ERROR, "Subtitle packets must have a pts\n"); return exit_on_error ? AVERROR(EINVAL) : 0; } if (ost->finished || (of->start_time != AV_NOPTS_VALUE && sub->pts < of->start_time)) return 0; enc = ost->enc_ctx; /* Note: DVB subtitle need one packet to draw them and one other packet to clear them */ /* XXX: signal it in the codec context ? */ if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) nb = 2; else if (enc->codec_id == AV_CODEC_ID_ASS) nb = FFMAX(sub->num_rects, 1); else nb = 1; /* shift timestamp to honor -ss and make check_recording_time() work with -t */ pts = sub->pts; if (output_files[ost->file_index]->start_time != AV_NOPTS_VALUE) pts -= output_files[ost->file_index]->start_time; for (i = 0; i < nb; i++) { AVSubtitle local_sub = *sub; if (!check_recording_time(ost, pts, AV_TIME_BASE_Q)) return 0; ret = av_new_packet(pkt, subtitle_out_max_size); if (ret < 0) return AVERROR(ENOMEM); local_sub.pts = pts; // start_display_time is required to be 0 local_sub.pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q); local_sub.end_display_time -= sub->start_display_time; local_sub.start_display_time = 0; if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE && i == 1) local_sub.num_rects = 0; else if (enc->codec_id == AV_CODEC_ID_ASS && sub->num_rects > 0) { local_sub.num_rects = 1; local_sub.rects += i; } ost->frames_encoded++; subtitle_out_size = avcodec_encode_subtitle(enc, pkt->data, pkt->size, &local_sub); if (subtitle_out_size < 0) { av_log(ost, AV_LOG_FATAL, "Subtitle encoding failed\n"); return subtitle_out_size; } av_shrink_packet(pkt, subtitle_out_size); pkt->time_base = AV_TIME_BASE_Q; pkt->pts = sub->pts; pkt->duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, pkt->time_base); if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) { /* XXX: the pts correction is handled here. Maybe handling it in the codec would be better */ if (i == 0) pkt->pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, pkt->time_base); else pkt->pts += av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, pkt->time_base); } pkt->dts = pkt->pts; ret = of_output_packet(of, ost, pkt); if (ret < 0) return ret; } return 0; } void enc_stats_write(OutputStream *ost, EncStats *es, const AVFrame *frame, const AVPacket *pkt, uint64_t frame_num) { Encoder *e = ost->enc; AVIOContext *io = es->io; AVRational tb = frame ? frame->time_base : pkt->time_base; int64_t pts = frame ? frame->pts : pkt->pts; AVRational tbi = (AVRational){ 0, 1}; int64_t ptsi = INT64_MAX; const FrameData *fd; if ((frame && frame->opaque_ref) || (pkt && pkt->opaque_ref)) { fd = (const FrameData*)(frame ? frame->opaque_ref->data : pkt->opaque_ref->data); tbi = fd->dec.tb; ptsi = fd->dec.pts; } for (size_t i = 0; i < es->nb_components; i++) { const EncStatsComponent *c = &es->components[i]; switch (c->type) { case ENC_STATS_LITERAL: avio_write (io, c->str, c->str_len); continue; case ENC_STATS_FILE_IDX: avio_printf(io, "%d", ost->file_index); continue; case ENC_STATS_STREAM_IDX: avio_printf(io, "%d", ost->index); continue; case ENC_STATS_TIMEBASE: avio_printf(io, "%d/%d", tb.num, tb.den); continue; case ENC_STATS_TIMEBASE_IN: avio_printf(io, "%d/%d", tbi.num, tbi.den); continue; case ENC_STATS_PTS: avio_printf(io, "%"PRId64, pts); continue; case ENC_STATS_PTS_IN: avio_printf(io, "%"PRId64, ptsi); continue; case ENC_STATS_PTS_TIME: avio_printf(io, "%g", pts * av_q2d(tb)); continue; case ENC_STATS_PTS_TIME_IN: avio_printf(io, "%g", ptsi == INT64_MAX ? INFINITY : ptsi * av_q2d(tbi)); continue; case ENC_STATS_FRAME_NUM: avio_printf(io, "%"PRIu64, frame_num); continue; case ENC_STATS_FRAME_NUM_IN: avio_printf(io, "%"PRIu64, fd ? fd->dec.frame_num : -1); continue; } if (frame) { switch (c->type) { case ENC_STATS_SAMPLE_NUM: avio_printf(io, "%"PRIu64, ost->samples_encoded); continue; case ENC_STATS_NB_SAMPLES: avio_printf(io, "%d", frame->nb_samples); continue; default: av_assert0(0); } } else { switch (c->type) { case ENC_STATS_DTS: avio_printf(io, "%"PRId64, pkt->dts); continue; case ENC_STATS_DTS_TIME: avio_printf(io, "%g", pkt->dts * av_q2d(tb)); continue; case ENC_STATS_PKT_SIZE: avio_printf(io, "%d", pkt->size); continue; case ENC_STATS_BITRATE: { double duration = FFMAX(pkt->duration, 1) * av_q2d(tb); avio_printf(io, "%g", 8.0 * pkt->size / duration); continue; } case ENC_STATS_AVG_BITRATE: { double duration = pkt->dts * av_q2d(tb); avio_printf(io, "%g", duration > 0 ? 8.0 * e->data_size / duration : -1.); continue; } default: av_assert0(0); } } } avio_w8(io, '\n'); avio_flush(io); } static inline double psnr(double d) { return -10.0 * log10(d); } static int update_video_stats(OutputStream *ost, const AVPacket *pkt, int write_vstats) { Encoder *e = ost->enc; const uint8_t *sd = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, NULL); AVCodecContext *enc = ost->enc_ctx; enum AVPictureType pict_type; int64_t frame_number; double ti1, bitrate, avg_bitrate; double psnr_val = -1; ost->quality = sd ? AV_RL32(sd) : -1; pict_type = sd ? sd[4] : AV_PICTURE_TYPE_NONE; if ((enc->flags & AV_CODEC_FLAG_PSNR) && sd && sd[5]) { // FIXME the scaling assumes 8bit double error = AV_RL64(sd + 8) / (enc->width * enc->height * 255.0 * 255.0); if (error >= 0 && error <= 1) psnr_val = psnr(error); } if (!write_vstats) return 0; /* this is executed just the first time update_video_stats is called */ if (!vstats_file) { vstats_file = fopen(vstats_filename, "w"); if (!vstats_file) { perror("fopen"); return AVERROR(errno); } } frame_number = e->packets_encoded; if (vstats_version <= 1) { fprintf(vstats_file, "frame= %5"PRId64" q= %2.1f ", frame_number, ost->quality / (float)FF_QP2LAMBDA); } else { fprintf(vstats_file, "out= %2d st= %2d frame= %5"PRId64" q= %2.1f ", ost->file_index, ost->index, frame_number, ost->quality / (float)FF_QP2LAMBDA); } if (psnr_val >= 0) fprintf(vstats_file, "PSNR= %6.2f ", psnr_val); fprintf(vstats_file,"f_size= %6d ", pkt->size); /* compute pts value */ ti1 = pkt->dts * av_q2d(pkt->time_base); if (ti1 < 0.01) ti1 = 0.01; bitrate = (pkt->size * 8) / av_q2d(enc->time_base) / 1000.0; avg_bitrate = (double)(e->data_size * 8) / ti1 / 1000.0; fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ", (double)e->data_size / 1024, ti1, bitrate, avg_bitrate); fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(pict_type)); return 0; } static int encode_frame(OutputFile *of, OutputStream *ost, AVFrame *frame) { Encoder *e = ost->enc; AVCodecContext *enc = ost->enc_ctx; AVPacket *pkt = e->pkt; const char *type_desc = av_get_media_type_string(enc->codec_type); const char *action = frame ? "encode" : "flush"; int ret; if (frame) { if (ost->enc_stats_pre.io) enc_stats_write(ost, &ost->enc_stats_pre, frame, NULL, ost->frames_encoded); ost->frames_encoded++; ost->samples_encoded += frame->nb_samples; if (debug_ts) { av_log(ost, AV_LOG_INFO, "encoder <- type:%s " "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n", type_desc, av_ts2str(frame->pts), av_ts2timestr(frame->pts, &enc->time_base), enc->time_base.num, enc->time_base.den); } if (frame->sample_aspect_ratio.num && !ost->frame_aspect_ratio.num) enc->sample_aspect_ratio = frame->sample_aspect_ratio; } else if (ost->last_dropped) { ost->nb_frames_drop++; ost->last_dropped = 0; } update_benchmark(NULL); ret = avcodec_send_frame(enc, frame); if (ret < 0 && !(ret == AVERROR_EOF && !frame)) { av_log(ost, AV_LOG_ERROR, "Error submitting %s frame to the encoder\n", type_desc); return ret; } while (1) { av_packet_unref(pkt); ret = avcodec_receive_packet(enc, pkt); update_benchmark("%s_%s %d.%d", action, type_desc, ost->file_index, ost->index); pkt->time_base = enc->time_base; /* if two pass, output log on success and EOF */ if ((ret >= 0 || ret == AVERROR_EOF) && ost->logfile && enc->stats_out) fprintf(ost->logfile, "%s", enc->stats_out); if (ret == AVERROR(EAGAIN)) { av_assert0(frame); // should never happen during flushing return 0; } else if (ret == AVERROR_EOF) { ret = of_output_packet(of, ost, NULL); return ret < 0 ? ret : AVERROR_EOF; } else if (ret < 0) { av_log(ost, AV_LOG_ERROR, "%s encoding failed\n", type_desc); return ret; } if (enc->codec_type == AVMEDIA_TYPE_VIDEO) { ret = update_video_stats(ost, pkt, !!vstats_filename); if (ret < 0) return ret; } if (ost->enc_stats_post.io) enc_stats_write(ost, &ost->enc_stats_post, NULL, pkt, e->packets_encoded); if (debug_ts) { av_log(ost, AV_LOG_INFO, "encoder -> type:%s " "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s " "duration:%s duration_time:%s\n", type_desc, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &enc->time_base), av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &enc->time_base), av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &enc->time_base)); } if ((ret = trigger_fix_sub_duration_heartbeat(ost, pkt)) < 0) { av_log(NULL, AV_LOG_ERROR, "Subtitle heartbeat logic failed in %s! (%s)\n", __func__, av_err2str(ret)); return ret; } e->data_size += pkt->size; e->packets_encoded++; ret = of_output_packet(of, ost, pkt); if (ret < 0) return ret; } av_assert0(0); } static int submit_encode_frame(OutputFile *of, OutputStream *ost, AVFrame *frame) { Encoder *e = ost->enc; int ret; if (ost->sq_idx_encode < 0) return encode_frame(of, ost, frame); if (frame) { ret = av_frame_ref(e->sq_frame, frame); if (ret < 0) return ret; frame = e->sq_frame; } ret = sq_send(of->sq_encode, ost->sq_idx_encode, SQFRAME(frame)); if (ret < 0) { if (frame) av_frame_unref(frame); if (ret != AVERROR_EOF) return ret; } while (1) { AVFrame *enc_frame = e->sq_frame; ret = sq_receive(of->sq_encode, ost->sq_idx_encode, SQFRAME(enc_frame)); if (ret == AVERROR_EOF) { enc_frame = NULL; } else if (ret < 0) { return (ret == AVERROR(EAGAIN)) ? 0 : ret; } ret = encode_frame(of, ost, enc_frame); if (enc_frame) av_frame_unref(enc_frame); if (ret < 0) { if (ret == AVERROR_EOF) close_output_stream(ost); return ret; } } } static int do_audio_out(OutputFile *of, OutputStream *ost, AVFrame *frame) { Encoder *e = ost->enc; AVCodecContext *enc = ost->enc_ctx; int ret; if (!(enc->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE) && enc->ch_layout.nb_channels != frame->ch_layout.nb_channels) { av_log(ost, AV_LOG_ERROR, "Audio channel count changed and encoder does not support parameter changes\n"); return 0; } if (frame->pts == AV_NOPTS_VALUE) frame->pts = e->next_pts; else { int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time; frame->pts = av_rescale_q(frame->pts, frame->time_base, enc->time_base) - av_rescale_q(start_time, AV_TIME_BASE_Q, enc->time_base); } frame->time_base = enc->time_base; frame->duration = av_rescale_q(frame->nb_samples, (AVRational){1, frame->sample_rate}, enc->time_base); if (!check_recording_time(ost, frame->pts, frame->time_base)) return 0; e->next_pts = frame->pts + frame->nb_samples; ret = submit_encode_frame(of, ost, frame); return (ret < 0 && ret != AVERROR_EOF) ? ret : 0; } static double adjust_frame_pts_to_encoder_tb(AVFrame *frame, AVRational tb_dst, int64_t start_time) { double float_pts = AV_NOPTS_VALUE; // this is identical to frame.pts but with higher precision AVRational tb = tb_dst; AVRational filter_tb = frame->time_base; const int extra_bits = av_clip(29 - av_log2(tb.den), 0, 16); if (frame->pts == AV_NOPTS_VALUE) goto early_exit; tb.den <<= extra_bits; float_pts = av_rescale_q(frame->pts, filter_tb, tb) - av_rescale_q(start_time, AV_TIME_BASE_Q, tb); float_pts /= 1 << extra_bits; // when float_pts is not exactly an integer, // avoid exact midpoints to reduce the chance of rounding differences, this // can be removed in case the fps code is changed to work with integers if (float_pts != llrint(float_pts)) float_pts += FFSIGN(float_pts) * 1.0 / (1<<17); frame->pts = av_rescale_q(frame->pts, filter_tb, tb_dst) - av_rescale_q(start_time, AV_TIME_BASE_Q, tb_dst); frame->time_base = tb_dst; early_exit: if (debug_ts) { av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s exact:%f time_base:%d/%d\n", frame ? av_ts2str(frame->pts) : "NULL", av_ts2timestr(frame->pts, &tb_dst), float_pts, tb_dst.num, tb_dst.den); } return float_pts; } /* Convert frame timestamps to the encoder timebase and decide how many times * should this (and possibly previous) frame be repeated in order to conform to * desired target framerate (if any). */ static void video_sync_process(OutputFile *of, OutputStream *ost, AVFrame *frame, int64_t *nb_frames, int64_t *nb_frames_prev) { Encoder *e = ost->enc; AVCodecContext *enc = ost->enc_ctx; double delta0, delta, sync_ipts, duration; if (!frame) { *nb_frames_prev = *nb_frames = mid_pred(e->frames_prev_hist[0], e->frames_prev_hist[1], e->frames_prev_hist[2]); goto finish; } duration = frame->duration * av_q2d(frame->time_base) / av_q2d(enc->time_base); sync_ipts = adjust_frame_pts_to_encoder_tb(frame, enc->time_base, of->start_time == AV_NOPTS_VALUE ? 0 : of->start_time); /* delta0 is the "drift" between the input frame and * where it would fall in the output. */ delta0 = sync_ipts - e->next_pts; delta = delta0 + duration; // tracks the number of times the PREVIOUS frame should be duplicated, // mostly for variable framerate (VFR) *nb_frames_prev = 0; /* by default, we output a single frame */ *nb_frames = 1; if (delta0 < 0 && delta > 0 && ost->vsync_method != VSYNC_PASSTHROUGH && ost->vsync_method != VSYNC_DROP) { if (delta0 < -0.6) { av_log(ost, AV_LOG_VERBOSE, "Past duration %f too large\n", -delta0); } else av_log(ost, AV_LOG_DEBUG, "Clipping frame in rate conversion by %f\n", -delta0); sync_ipts = e->next_pts; duration += delta0; delta0 = 0; } switch (ost->vsync_method) { case VSYNC_VSCFR: if (e->vsync_frame_number == 0 && delta0 >= 0.5) { av_log(ost, AV_LOG_DEBUG, "Not duplicating %d initial frames\n", (int)lrintf(delta0)); delta = duration; delta0 = 0; e->next_pts = llrint(sync_ipts); } case VSYNC_CFR: // FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c if (frame_drop_threshold && delta < frame_drop_threshold && e->vsync_frame_number) { *nb_frames = 0; } else if (delta < -1.1) *nb_frames = 0; else if (delta > 1.1) { *nb_frames = llrintf(delta); if (delta0 > 1.1) *nb_frames_prev = llrintf(delta0 - 0.6); } frame->duration = 1; break; case VSYNC_VFR: if (delta <= -0.6) *nb_frames = 0; else if (delta > 0.6) e->next_pts = llrint(sync_ipts); frame->duration = llrint(duration); break; case VSYNC_DROP: case VSYNC_PASSTHROUGH: frame->duration = llrint(duration); e->next_pts = llrint(sync_ipts); break; default: av_assert0(0); } finish: memmove(e->frames_prev_hist + 1, e->frames_prev_hist, sizeof(e->frames_prev_hist[0]) * (FF_ARRAY_ELEMS(e->frames_prev_hist) - 1)); e->frames_prev_hist[0] = *nb_frames_prev; if (*nb_frames_prev == 0 && ost->last_dropped) { ost->nb_frames_drop++; av_log(ost, AV_LOG_VERBOSE, "*** dropping frame %"PRId64" at ts %"PRId64"\n", e->vsync_frame_number, e->last_frame->pts); } if (*nb_frames > (*nb_frames_prev && ost->last_dropped) + (*nb_frames > *nb_frames_prev)) { if (*nb_frames > dts_error_threshold * 30) { av_log(ost, AV_LOG_ERROR, "%"PRId64" frame duplication too large, skipping\n", *nb_frames - 1); ost->nb_frames_drop++; *nb_frames = 0; return; } ost->nb_frames_dup += *nb_frames - (*nb_frames_prev && ost->last_dropped) - (*nb_frames > *nb_frames_prev); av_log(ost, AV_LOG_VERBOSE, "*** %"PRId64" dup!\n", *nb_frames - 1); if (ost->nb_frames_dup > e->dup_warning) { av_log(ost, AV_LOG_WARNING, "More than %"PRIu64" frames duplicated\n", e->dup_warning); e->dup_warning *= 10; } } ost->last_dropped = *nb_frames == *nb_frames_prev && frame; ost->kf.dropped_keyframe |= ost->last_dropped && (frame->flags & AV_FRAME_FLAG_KEY); } static enum AVPictureType forced_kf_apply(void *logctx, KeyframeForceCtx *kf, AVRational tb, const AVFrame *in_picture, int dup_idx) { double pts_time; if (kf->ref_pts == AV_NOPTS_VALUE) kf->ref_pts = in_picture->pts; pts_time = (in_picture->pts - kf->ref_pts) * av_q2d(tb); if (kf->index < kf->nb_pts && av_compare_ts(in_picture->pts, tb, kf->pts[kf->index], AV_TIME_BASE_Q) >= 0) { kf->index++; goto force_keyframe; } else if (kf->pexpr) { double res; kf->expr_const_values[FKF_T] = pts_time; res = av_expr_eval(kf->pexpr, kf->expr_const_values, NULL); av_log(logctx, AV_LOG_TRACE, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n", kf->expr_const_values[FKF_N], kf->expr_const_values[FKF_N_FORCED], kf->expr_const_values[FKF_PREV_FORCED_N], kf->expr_const_values[FKF_T], kf->expr_const_values[FKF_PREV_FORCED_T], res); kf->expr_const_values[FKF_N] += 1; if (res) { kf->expr_const_values[FKF_PREV_FORCED_N] = kf->expr_const_values[FKF_N] - 1; kf->expr_const_values[FKF_PREV_FORCED_T] = kf->expr_const_values[FKF_T]; kf->expr_const_values[FKF_N_FORCED] += 1; goto force_keyframe; } } else if (kf->type == KF_FORCE_SOURCE && !dup_idx) { int dropped_keyframe = kf->dropped_keyframe; kf->dropped_keyframe = 0; if ((in_picture->flags & AV_FRAME_FLAG_KEY) || dropped_keyframe) goto force_keyframe; } return AV_PICTURE_TYPE_NONE; force_keyframe: av_log(logctx, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time); return AV_PICTURE_TYPE_I; } /* May modify/reset frame */ static int do_video_out(OutputFile *of, OutputStream *ost, AVFrame *frame) { int ret; Encoder *e = ost->enc; AVCodecContext *enc = ost->enc_ctx; int64_t nb_frames, nb_frames_prev, i; video_sync_process(of, ost, frame, &nb_frames, &nb_frames_prev); /* duplicates frame if needed */ for (i = 0; i < nb_frames; i++) { AVFrame *in_picture; if (i < nb_frames_prev && e->last_frame->buf[0]) { in_picture = e->last_frame; } else in_picture = frame; if (!in_picture) return 0; in_picture->pts = e->next_pts; if (!check_recording_time(ost, in_picture->pts, ost->enc_ctx->time_base)) return 0; in_picture->quality = enc->global_quality; in_picture->pict_type = forced_kf_apply(ost, &ost->kf, enc->time_base, in_picture, i); #if FFMPEG_OPT_TOP if (ost->top_field_first >= 0) { in_picture->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST; in_picture->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST * (!!ost->top_field_first); } #endif ret = submit_encode_frame(of, ost, in_picture); if (ret == AVERROR_EOF) break; else if (ret < 0) return ret; e->next_pts++; e->vsync_frame_number++; } av_frame_unref(e->last_frame); if (frame) av_frame_move_ref(e->last_frame, frame); return 0; } int enc_frame(OutputStream *ost, AVFrame *frame) { OutputFile *of = output_files[ost->file_index]; int ret; ret = enc_open(ost, frame); if (ret < 0) return ret; return ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO ? do_video_out(of, ost, frame) : do_audio_out(of, ost, frame); } int enc_flush(void) { int ret; for (OutputStream *ost = ost_iter(NULL); ost; ost = ost_iter(ost)) { OutputFile *of = output_files[ost->file_index]; if (ost->sq_idx_encode >= 0) sq_send(of->sq_encode, ost->sq_idx_encode, SQFRAME(NULL)); } for (OutputStream *ost = ost_iter(NULL); ost; ost = ost_iter(ost)) { Encoder *e = ost->enc; AVCodecContext *enc = ost->enc_ctx; OutputFile *of = output_files[ost->file_index]; if (!enc || !e->opened || (enc->codec_type != AVMEDIA_TYPE_VIDEO && enc->codec_type != AVMEDIA_TYPE_AUDIO)) continue; ret = submit_encode_frame(of, ost, NULL); if (ret != AVERROR_EOF) return ret; } return 0; }