/* * ffmpeg filter configuration * * 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 <stdint.h> #include "ffmpeg.h" #include "libavfilter/avfilter.h" #include "libavfilter/buffersink.h" #include "libavresample/avresample.h" #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/bprint.h" #include "libavutil/channel_layout.h" #include "libavutil/opt.h" #include "libavutil/pixdesc.h" #include "libavutil/pixfmt.h" #include "libavutil/imgutils.h" #include "libavutil/samplefmt.h" enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target) { if (codec && codec->pix_fmts) { const enum AVPixelFormat *p = codec->pix_fmts; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target); int has_alpha = desc ? desc->nb_components % 2 == 0 : 0; enum AVPixelFormat best= AV_PIX_FMT_NONE; static const enum AVPixelFormat mjpeg_formats[] = { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE }; static const enum AVPixelFormat ljpeg_formats[] = { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE }; if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) { if (enc_ctx->codec_id == AV_CODEC_ID_MJPEG) { p = mjpeg_formats; } else if (enc_ctx->codec_id == AV_CODEC_ID_LJPEG) { p =ljpeg_formats; } } for (; *p != AV_PIX_FMT_NONE; p++) { best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL); if (*p == target) break; } if (*p == AV_PIX_FMT_NONE) { if (target != AV_PIX_FMT_NONE) av_log(NULL, AV_LOG_WARNING, "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n", av_get_pix_fmt_name(target), codec->name, av_get_pix_fmt_name(best)); return best; } } return target; } void choose_sample_fmt(AVStream *st, AVCodec *codec) { if (codec && codec->sample_fmts) { const enum AVSampleFormat *p = codec->sample_fmts; for (; *p != -1; p++) { if (*p == st->codec->sample_fmt) break; } if (*p == -1) { if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0])) av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n"); if(av_get_sample_fmt_name(st->codec->sample_fmt)) av_log(NULL, AV_LOG_WARNING, "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n", av_get_sample_fmt_name(st->codec->sample_fmt), codec->name, av_get_sample_fmt_name(codec->sample_fmts[0])); st->codec->sample_fmt = codec->sample_fmts[0]; } } } static char *choose_pix_fmts(OutputStream *ost) { AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0); if (strict_dict) // used by choose_pixel_fmt() and below av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0); if (ost->keep_pix_fmt) { if (ost->filter) avfilter_graph_set_auto_convert(ost->filter->graph->graph, AVFILTER_AUTO_CONVERT_NONE); if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE) return NULL; return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt)); } if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) { return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt))); } else if (ost->enc && ost->enc->pix_fmts) { const enum AVPixelFormat *p; AVIOContext *s = NULL; uint8_t *ret; int len; if (avio_open_dyn_buf(&s) < 0) exit_program(1); p = ost->enc->pix_fmts; if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) { if (ost->enc_ctx->codec_id == AV_CODEC_ID_MJPEG) { p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE }; } else if (ost->enc_ctx->codec_id == AV_CODEC_ID_LJPEG) { p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE }; } } for (; *p != AV_PIX_FMT_NONE; p++) { const char *name = av_get_pix_fmt_name(*p); avio_printf(s, "%s|", name); } len = avio_close_dyn_buf(s, &ret); ret[len - 1] = 0; return ret; } else return NULL; } /* Define a function for building a string containing a list of * allowed formats. */ #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \ static char *choose_ ## var ## s(OutputStream *ost) \ { \ if (ost->enc_ctx->var != none) { \ get_name(ost->enc_ctx->var); \ return av_strdup(name); \ } else if (ost->enc && ost->enc->supported_list) { \ const type *p; \ AVIOContext *s = NULL; \ uint8_t *ret; \ int len; \ \ if (avio_open_dyn_buf(&s) < 0) \ exit_program(1); \ \ for (p = ost->enc->supported_list; *p != none; p++) { \ get_name(*p); \ avio_printf(s, "%s|", name); \ } \ len = avio_close_dyn_buf(s, &ret); \ ret[len - 1] = 0; \ return ret; \ } else \ return NULL; \ } // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE, // GET_PIX_FMT_NAME) DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts, AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME) DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0, GET_SAMPLE_RATE_NAME) DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0, GET_CH_LAYOUT_NAME) FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost) { FilterGraph *fg = av_mallocz(sizeof(*fg)); if (!fg) exit_program(1); fg->index = nb_filtergraphs; GROW_ARRAY(fg->outputs, fg->nb_outputs); if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0])))) exit_program(1); fg->outputs[0]->ost = ost; fg->outputs[0]->graph = fg; ost->filter = fg->outputs[0]; GROW_ARRAY(fg->inputs, fg->nb_inputs); if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0])))) exit_program(1); fg->inputs[0]->ist = ist; fg->inputs[0]->graph = fg; GROW_ARRAY(ist->filters, ist->nb_filters); ist->filters[ist->nb_filters - 1] = fg->inputs[0]; GROW_ARRAY(filtergraphs, nb_filtergraphs); filtergraphs[nb_filtergraphs - 1] = fg; return fg; } static void init_input_filter(FilterGraph *fg, AVFilterInOut *in) { InputStream *ist = NULL; enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx); int i; // TODO: support other filter types if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) { av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported " "currently.\n"); exit_program(1); } if (in->name) { AVFormatContext *s; AVStream *st = NULL; char *p; int file_idx = strtol(in->name, &p, 0); if (file_idx < 0 || file_idx >= nb_input_files) { av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n", file_idx, fg->graph_desc); exit_program(1); } s = input_files[file_idx]->ctx; for (i = 0; i < s->nb_streams; i++) { enum AVMediaType stream_type = s->streams[i]->codec->codec_type; if (stream_type != type && !(stream_type == AVMEDIA_TYPE_SUBTITLE && type == AVMEDIA_TYPE_VIDEO /* sub2video hack */)) continue; if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) { st = s->streams[i]; break; } } if (!st) { av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s " "matches no streams.\n", p, fg->graph_desc); exit_program(1); } ist = input_streams[input_files[file_idx]->ist_index + st->index]; } else { /* find the first unused stream of corresponding type */ for (i = 0; i < nb_input_streams; i++) { ist = input_streams[i]; if (ist->dec_ctx->codec_type == type && ist->discard) break; } if (i == nb_input_streams) { av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for " "unlabeled input pad %d on filter %s\n", in->pad_idx, in->filter_ctx->name); exit_program(1); } } av_assert0(ist); ist->discard = 0; ist->decoding_needed |= DECODING_FOR_FILTER; ist->st->discard = AVDISCARD_NONE; GROW_ARRAY(fg->inputs, fg->nb_inputs); if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0])))) exit_program(1); fg->inputs[fg->nb_inputs - 1]->ist = ist; fg->inputs[fg->nb_inputs - 1]->graph = fg; GROW_ARRAY(ist->filters, ist->nb_filters); ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1]; } static int insert_trim(int64_t start_time, int64_t duration, AVFilterContext **last_filter, int *pad_idx, const char *filter_name) { AVFilterGraph *graph = (*last_filter)->graph; AVFilterContext *ctx; const AVFilter *trim; enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx); const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim"; int ret = 0; if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE) return 0; trim = avfilter_get_by_name(name); if (!trim) { av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit " "recording time.\n", name); return AVERROR_FILTER_NOT_FOUND; } ctx = avfilter_graph_alloc_filter(graph, trim, filter_name); if (!ctx) return AVERROR(ENOMEM); if (duration != INT64_MAX) { ret = av_opt_set_int(ctx, "durationi", duration, AV_OPT_SEARCH_CHILDREN); } if (ret >= 0 && start_time != AV_NOPTS_VALUE) { ret = av_opt_set_int(ctx, "starti", start_time, AV_OPT_SEARCH_CHILDREN); } if (ret < 0) { av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name); return ret; } ret = avfilter_init_str(ctx, NULL); if (ret < 0) return ret; ret = avfilter_link(*last_filter, *pad_idx, ctx, 0); if (ret < 0) return ret; *last_filter = ctx; *pad_idx = 0; return 0; } static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out) { char *pix_fmts; OutputStream *ost = ofilter->ost; OutputFile *of = output_files[ost->file_index]; AVCodecContext *codec = ost->enc_ctx; AVFilterContext *last_filter = out->filter_ctx; int pad_idx = out->pad_idx; int ret; char name[255]; snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index); ret = avfilter_graph_create_filter(&ofilter->filter, avfilter_get_by_name("buffersink"), name, NULL, NULL, fg->graph); if (ret < 0) return ret; if (codec->width || codec->height) { char args[255]; AVFilterContext *filter; snprintf(args, sizeof(args), "%d:%d:0x%X", codec->width, codec->height, (unsigned)ost->sws_flags); snprintf(name, sizeof(name), "scaler for output stream %d:%d", ost->file_index, ost->index); if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"), name, args, NULL, fg->graph)) < 0) return ret; if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0) return ret; last_filter = filter; pad_idx = 0; } if ((pix_fmts = choose_pix_fmts(ost))) { AVFilterContext *filter; snprintf(name, sizeof(name), "pixel format for output stream %d:%d", ost->file_index, ost->index); ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("format"), "format", pix_fmts, NULL, fg->graph); av_freep(&pix_fmts); if (ret < 0) return ret; if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0) return ret; last_filter = filter; pad_idx = 0; } if (ost->frame_rate.num && 0) { AVFilterContext *fps; char args[255]; snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num, ost->frame_rate.den); snprintf(name, sizeof(name), "fps for output stream %d:%d", ost->file_index, ost->index); ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"), name, args, NULL, fg->graph); if (ret < 0) return ret; ret = avfilter_link(last_filter, pad_idx, fps, 0); if (ret < 0) return ret; last_filter = fps; pad_idx = 0; } snprintf(name, sizeof(name), "trim for output stream %d:%d", ost->file_index, ost->index); ret = insert_trim(of->start_time, of->recording_time, &last_filter, &pad_idx, name); if (ret < 0) return ret; if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0) return ret; return 0; } static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out) { OutputStream *ost = ofilter->ost; OutputFile *of = output_files[ost->file_index]; AVCodecContext *codec = ost->enc_ctx; AVFilterContext *last_filter = out->filter_ctx; int pad_idx = out->pad_idx; char *sample_fmts, *sample_rates, *channel_layouts; char name[255]; int ret; snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index); ret = avfilter_graph_create_filter(&ofilter->filter, avfilter_get_by_name("abuffersink"), name, NULL, NULL, fg->graph); if (ret < 0) return ret; if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0) return ret; #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \ AVFilterContext *filt_ctx; \ \ av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \ "similarly to -af " filter_name "=%s.\n", arg); \ \ ret = avfilter_graph_create_filter(&filt_ctx, \ avfilter_get_by_name(filter_name), \ filter_name, arg, NULL, fg->graph); \ if (ret < 0) \ return ret; \ \ ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \ if (ret < 0) \ return ret; \ \ last_filter = filt_ctx; \ pad_idx = 0; \ } while (0) if (ost->audio_channels_mapped) { int i; AVBPrint pan_buf; av_bprint_init(&pan_buf, 256, 8192); av_bprintf(&pan_buf, "0x%"PRIx64, av_get_default_channel_layout(ost->audio_channels_mapped)); for (i = 0; i < ost->audio_channels_mapped; i++) if (ost->audio_channels_map[i] != -1) av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]); AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str); av_bprint_finalize(&pan_buf, NULL); } if (codec->channels && !codec->channel_layout) codec->channel_layout = av_get_default_channel_layout(codec->channels); sample_fmts = choose_sample_fmts(ost); sample_rates = choose_sample_rates(ost); channel_layouts = choose_channel_layouts(ost); if (sample_fmts || sample_rates || channel_layouts) { AVFilterContext *format; char args[256]; args[0] = 0; if (sample_fmts) av_strlcatf(args, sizeof(args), "sample_fmts=%s:", sample_fmts); if (sample_rates) av_strlcatf(args, sizeof(args), "sample_rates=%s:", sample_rates); if (channel_layouts) av_strlcatf(args, sizeof(args), "channel_layouts=%s:", channel_layouts); av_freep(&sample_fmts); av_freep(&sample_rates); av_freep(&channel_layouts); snprintf(name, sizeof(name), "audio format for output stream %d:%d", ost->file_index, ost->index); ret = avfilter_graph_create_filter(&format, avfilter_get_by_name("aformat"), name, args, NULL, fg->graph); if (ret < 0) return ret; ret = avfilter_link(last_filter, pad_idx, format, 0); if (ret < 0) return ret; last_filter = format; pad_idx = 0; } if (audio_volume != 256 && 0) { char args[256]; snprintf(args, sizeof(args), "%f", audio_volume / 256.); AUTO_INSERT_FILTER("-vol", "volume", args); } if (ost->apad && of->shortest) { char args[256]; int i; for (i=0; i<of->ctx->nb_streams; i++) if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) break; if (i<of->ctx->nb_streams) { snprintf(args, sizeof(args), "%s", ost->apad); AUTO_INSERT_FILTER("-apad", "apad", args); } } snprintf(name, sizeof(name), "trim for output stream %d:%d", ost->file_index, ost->index); ret = insert_trim(of->start_time, of->recording_time, &last_filter, &pad_idx, name); if (ret < 0) return ret; if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0) return ret; return 0; } #define DESCRIBE_FILTER_LINK(f, inout, in) \ { \ AVFilterContext *ctx = inout->filter_ctx; \ AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \ int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \ AVIOContext *pb; \ \ if (avio_open_dyn_buf(&pb) < 0) \ exit_program(1); \ \ avio_printf(pb, "%s", ctx->filter->name); \ if (nb_pads > 1) \ avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\ avio_w8(pb, 0); \ avio_close_dyn_buf(pb, &f->name); \ } int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out) { av_freep(&ofilter->name); DESCRIBE_FILTER_LINK(ofilter, out, 0); switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) { case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out); case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out); default: av_assert0(0); } } static int sub2video_prepare(InputStream *ist) { AVFormatContext *avf = input_files[ist->file_index]->ctx; int i, w, h; /* Compute the size of the canvas for the subtitles stream. If the subtitles codec has set a size, use it. Otherwise use the maximum dimensions of the video streams in the same file. */ w = ist->dec_ctx->width; h = ist->dec_ctx->height; if (!(w && h)) { for (i = 0; i < avf->nb_streams; i++) { if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) { w = FFMAX(w, avf->streams[i]->codec->width); h = FFMAX(h, avf->streams[i]->codec->height); } } if (!(w && h)) { w = FFMAX(w, 720); h = FFMAX(h, 576); } av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h); } ist->sub2video.w = ist->dec_ctx->width = ist->resample_width = w; ist->sub2video.h = ist->dec_ctx->height = ist->resample_height = h; /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the palettes for all rectangles are identical or compatible */ ist->resample_pix_fmt = ist->dec_ctx->pix_fmt = AV_PIX_FMT_RGB32; ist->sub2video.frame = av_frame_alloc(); if (!ist->sub2video.frame) return AVERROR(ENOMEM); ist->sub2video.last_pts = INT64_MIN; return 0; } static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in) { AVFilterContext *last_filter; const AVFilter *buffer_filt = avfilter_get_by_name("buffer"); InputStream *ist = ifilter->ist; InputFile *f = input_files[ist->file_index]; AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) : ist->st->time_base; AVRational fr = ist->framerate; AVRational sar; AVBPrint args; char name[255]; int ret, pad_idx = 0; int64_t tsoffset = 0; if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n"); return AVERROR(EINVAL); } if (!fr.num) fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL); if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) { ret = sub2video_prepare(ist); if (ret < 0) return ret; } sar = ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio : ist->dec_ctx->sample_aspect_ratio; if(!sar.den) sar = (AVRational){0,1}; av_bprint_init(&args, 0, 1); av_bprintf(&args, "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:" "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width, ist->resample_height, ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt, tb.num, tb.den, sar.num, sar.den, SWS_BILINEAR + ((ist->dec_ctx->flags&CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0)); if (fr.num && fr.den) av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den); snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index, ist->file_index, ist->st->index); if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name, args.str, NULL, fg->graph)) < 0) return ret; last_filter = ifilter->filter; if (ist->framerate.num) { AVFilterContext *setpts; snprintf(name, sizeof(name), "force CFR for input from stream %d:%d", ist->file_index, ist->st->index); if ((ret = avfilter_graph_create_filter(&setpts, avfilter_get_by_name("setpts"), name, "N", NULL, fg->graph)) < 0) return ret; if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0) return ret; last_filter = setpts; } if (do_deinterlace) { AVFilterContext *yadif; snprintf(name, sizeof(name), "deinterlace input from stream %d:%d", ist->file_index, ist->st->index); if ((ret = avfilter_graph_create_filter(&yadif, avfilter_get_by_name("yadif"), name, "", NULL, fg->graph)) < 0) return ret; if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0) return ret; last_filter = yadif; } snprintf(name, sizeof(name), "trim for input stream %d:%d", ist->file_index, ist->st->index); if (copy_ts) { tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time; if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE) tsoffset += f->ctx->start_time; } ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ? AV_NOPTS_VALUE : tsoffset, f->recording_time, &last_filter, &pad_idx, name); if (ret < 0) return ret; if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0) return ret; return 0; } static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in) { AVFilterContext *last_filter; const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer"); InputStream *ist = ifilter->ist; InputFile *f = input_files[ist->file_index]; AVBPrint args; char name[255]; int ret, pad_idx = 0; int64_t tsoffset = 0; if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) { av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n"); return AVERROR(EINVAL); } av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC); av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s", 1, ist->dec_ctx->sample_rate, ist->dec_ctx->sample_rate, av_get_sample_fmt_name(ist->dec_ctx->sample_fmt)); if (ist->dec_ctx->channel_layout) av_bprintf(&args, ":channel_layout=0x%"PRIx64, ist->dec_ctx->channel_layout); else av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels); snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index, ist->file_index, ist->st->index); if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt, name, args.str, NULL, fg->graph)) < 0) return ret; last_filter = ifilter->filter; #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \ AVFilterContext *filt_ctx; \ \ av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \ "similarly to -af " filter_name "=%s.\n", arg); \ \ snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \ fg->index, filter_name, ist->file_index, ist->st->index); \ ret = avfilter_graph_create_filter(&filt_ctx, \ avfilter_get_by_name(filter_name), \ name, arg, NULL, fg->graph); \ if (ret < 0) \ return ret; \ \ ret = avfilter_link(last_filter, 0, filt_ctx, 0); \ if (ret < 0) \ return ret; \ \ last_filter = filt_ctx; \ } while (0) if (audio_sync_method > 0) { char args[256] = {0}; av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method); if (audio_drift_threshold != 0.1) av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold); if (!fg->reconfiguration) av_strlcatf(args, sizeof(args), ":first_pts=0"); AUTO_INSERT_FILTER_INPUT("-async", "aresample", args); } // if (ost->audio_channels_mapped) { // int i; // AVBPrint pan_buf; // av_bprint_init(&pan_buf, 256, 8192); // av_bprintf(&pan_buf, "0x%"PRIx64, // av_get_default_channel_layout(ost->audio_channels_mapped)); // for (i = 0; i < ost->audio_channels_mapped; i++) // if (ost->audio_channels_map[i] != -1) // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]); // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str); // av_bprint_finalize(&pan_buf, NULL); // } if (audio_volume != 256) { char args[256]; av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume " "audio filter instead.\n"); snprintf(args, sizeof(args), "%f", audio_volume / 256.); AUTO_INSERT_FILTER_INPUT("-vol", "volume", args); } snprintf(name, sizeof(name), "trim for input stream %d:%d", ist->file_index, ist->st->index); if (copy_ts) { tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time; if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE) tsoffset += f->ctx->start_time; } ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ? AV_NOPTS_VALUE : tsoffset, f->recording_time, &last_filter, &pad_idx, name); if (ret < 0) return ret; if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0) return ret; return 0; } static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in) { av_freep(&ifilter->name); DESCRIBE_FILTER_LINK(ifilter, in, 1); if (!ifilter->ist->dec) { av_log(NULL, AV_LOG_ERROR, "No decoder for stream #%d:%d, filtering impossible\n", ifilter->ist->file_index, ifilter->ist->st->index); return AVERROR_DECODER_NOT_FOUND; } switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) { case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in); case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in); default: av_assert0(0); } } int configure_filtergraph(FilterGraph *fg) { AVFilterInOut *inputs, *outputs, *cur; int ret, i, init = !fg->graph, simple = !fg->graph_desc; const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter : fg->graph_desc; avfilter_graph_free(&fg->graph); if (!(fg->graph = avfilter_graph_alloc())) return AVERROR(ENOMEM); if (simple) { OutputStream *ost = fg->outputs[0]->ost; char args[512]; AVDictionaryEntry *e = NULL; snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags); fg->graph->scale_sws_opts = av_strdup(args); args[0] = 0; while ((e = av_dict_get(ost->swr_opts, "", e, AV_DICT_IGNORE_SUFFIX))) { av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value); } if (strlen(args)) args[strlen(args)-1] = 0; av_opt_set(fg->graph, "aresample_swr_opts", args, 0); args[0] = '\0'; while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e, AV_DICT_IGNORE_SUFFIX))) { av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value); } if (strlen(args)) args[strlen(args) - 1] = '\0'; fg->graph->resample_lavr_opts = av_strdup(args); e = av_dict_get(ost->encoder_opts, "threads", NULL, 0); if (e) av_opt_set(fg->graph, "threads", e->value, 0); } if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0) return ret; if (simple && (!inputs || inputs->next || !outputs || outputs->next)) { av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have " "exactly one input and output.\n", graph_desc); return AVERROR(EINVAL); } for (cur = inputs; !simple && init && cur; cur = cur->next) init_input_filter(fg, cur); for (cur = inputs, i = 0; cur; cur = cur->next, i++) if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) { avfilter_inout_free(&inputs); avfilter_inout_free(&outputs); return ret; } avfilter_inout_free(&inputs); if (!init || simple) { /* we already know the mappings between lavfi outputs and output streams, * so we can finish the setup */ for (cur = outputs, i = 0; cur; cur = cur->next, i++) configure_output_filter(fg, fg->outputs[i], cur); avfilter_inout_free(&outputs); if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0) return ret; } else { /* wait until output mappings are processed */ for (cur = outputs; cur;) { GROW_ARRAY(fg->outputs, fg->nb_outputs); if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0])))) exit_program(1); fg->outputs[fg->nb_outputs - 1]->graph = fg; fg->outputs[fg->nb_outputs - 1]->out_tmp = cur; cur = cur->next; fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL; } } fg->reconfiguration = 1; for (i = 0; i < fg->nb_outputs; i++) { OutputStream *ost = fg->outputs[i]->ost; if (ost && ost->enc->type == AVMEDIA_TYPE_AUDIO && !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) av_buffersink_set_frame_size(ost->filter->filter, ost->enc_ctx->frame_size); } return 0; } int ist_in_filtergraph(FilterGraph *fg, InputStream *ist) { int i; for (i = 0; i < fg->nb_inputs; i++) if (fg->inputs[i]->ist == ist) return 1; return 0; }