/* * Copyright (c) 2011, Luca Barbato * * 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 */ /** * @file generic segmenter * M3U8 specification can be find here: * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming} */ #include "config_components.h" #include #include "avformat.h" #include "internal.h" #include "mux.h" #include "libavutil/avassert.h" #include "libavutil/internal.h" #include "libavutil/log.h" #include "libavutil/mem.h" #include "libavutil/opt.h" #include "libavutil/avstring.h" #include "libavutil/parseutils.h" #include "libavutil/mathematics.h" #include "libavutil/time.h" #include "libavutil/timecode.h" #include "libavutil/time_internal.h" #include "libavutil/timestamp.h" typedef struct SegmentListEntry { int index; double start_time, end_time; int64_t start_pts; int64_t offset_pts; char *filename; struct SegmentListEntry *next; int64_t last_duration; } SegmentListEntry; typedef enum { LIST_TYPE_UNDEFINED = -1, LIST_TYPE_FLAT = 0, LIST_TYPE_CSV, LIST_TYPE_M3U8, LIST_TYPE_EXT, ///< deprecated LIST_TYPE_FFCONCAT, LIST_TYPE_NB, } ListType; #define SEGMENT_LIST_FLAG_CACHE 1 #define SEGMENT_LIST_FLAG_LIVE 2 typedef struct SegmentContext { const AVClass *class; /**< Class for private options. */ int segment_idx; ///< index of the segment file to write, starting from 0 int segment_idx_wrap; ///< number after which the index wraps int segment_idx_wrap_nb; ///< number of time the index has wraped int segment_count; ///< number of segment files already written const AVOutputFormat *oformat; AVFormatContext *avf; char *format; ///< format to use for output segment files AVDictionary *format_options; char *list; ///< filename for the segment list file int list_flags; ///< flags affecting list generation int list_size; ///< number of entries for the segment list file int is_nullctx; ///< whether avf->pb is a nullctx int use_clocktime; ///< flag to cut segments at regular clock time int64_t clocktime_offset; //< clock offset for cutting the segments at regular clock time int64_t clocktime_wrap_duration; //< wrapping duration considered for starting a new segment int64_t last_val; ///< remember last time for wrap around detection int cut_pending; int header_written; ///< whether we've already called avformat_write_header char *entry_prefix; ///< prefix to add to list entry filenames int list_type; ///< set the list type AVIOContext *list_pb; ///< list file put-byte context int64_t time; ///< segment duration int64_t min_seg_duration; ///< minimum segment duration int use_strftime; ///< flag to expand filename with strftime int increment_tc; ///< flag to increment timecode if found char *times_str; ///< segment times specification string int64_t *times; ///< list of segment interval specification int nb_times; ///< number of elments in the times array char *frames_str; ///< segment frame numbers specification string int *frames; ///< list of frame number specification int nb_frames; ///< number of elments in the frames array int frame_count; ///< total number of reference frames int segment_frame_count; ///< number of reference frames in the segment int64_t time_delta; int individual_header_trailer; /**< Set by a private option. */ int write_header_trailer; /**< Set by a private option. */ char *header_filename; ///< filename to write the output header to int reset_timestamps; ///< reset timestamps at the beginning of each segment int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds char *reference_stream_specifier; ///< reference stream specifier int reference_stream_index; int64_t reference_stream_first_pts; ///< initial timestamp, expressed in microseconds int break_non_keyframes; int write_empty; int use_rename; char temp_list_filename[1024]; SegmentListEntry cur_entry; SegmentListEntry *segment_list_entries; SegmentListEntry *segment_list_entries_end; } SegmentContext; static void print_csv_escaped_str(AVIOContext *ctx, const char *str) { int needs_quoting = !!str[strcspn(str, "\",\n\r")]; if (needs_quoting) avio_w8(ctx, '"'); for (; *str; str++) { if (*str == '"') avio_w8(ctx, '"'); avio_w8(ctx, *str); } if (needs_quoting) avio_w8(ctx, '"'); } static int segment_mux_init(AVFormatContext *s) { SegmentContext *seg = s->priv_data; AVFormatContext *oc; int i; int ret; ret = avformat_alloc_output_context2(&seg->avf, seg->oformat, NULL, NULL); if (ret < 0) return ret; oc = seg->avf; oc->interrupt_callback = s->interrupt_callback; oc->max_delay = s->max_delay; av_dict_copy(&oc->metadata, s->metadata, 0); oc->opaque = s->opaque; oc->io_close2 = s->io_close2; oc->io_open = s->io_open; oc->flags = s->flags; for (i = 0; i < s->nb_streams; i++) { AVStream *st, *ist = s->streams[i]; AVCodecParameters *ipar = ist->codecpar, *opar; st = ff_stream_clone(oc, ist); if (!st) return AVERROR(ENOMEM); opar = st->codecpar; if (!oc->oformat->codec_tag || av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id || av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) { opar->codec_tag = ipar->codec_tag; } else { opar->codec_tag = 0; } } return 0; } static int set_segment_filename(AVFormatContext *s) { SegmentContext *seg = s->priv_data; AVFormatContext *oc = seg->avf; size_t size; int ret; char buf[1024]; char *new_name; if (seg->segment_idx_wrap) seg->segment_idx %= seg->segment_idx_wrap; if (seg->use_strftime) { time_t now0; struct tm *tm, tmpbuf; time(&now0); tm = localtime_r(&now0, &tmpbuf); if (!strftime(buf, sizeof(buf), s->url, tm)) { av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n"); return AVERROR(EINVAL); } } else if (av_get_frame_filename(buf, sizeof(buf), s->url, seg->segment_idx) < 0) { av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->url); return AVERROR(EINVAL); } new_name = av_strdup(buf); if (!new_name) return AVERROR(ENOMEM); ff_format_set_url(oc, new_name); /* copy modified name in list entry */ size = strlen(av_basename(oc->url)) + 1; if (seg->entry_prefix) size += strlen(seg->entry_prefix); if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0) return ret; snprintf(seg->cur_entry.filename, size, "%s%s", seg->entry_prefix ? seg->entry_prefix : "", av_basename(oc->url)); return 0; } static int segment_start(AVFormatContext *s, int write_header) { SegmentContext *seg = s->priv_data; AVFormatContext *oc = seg->avf; int err = 0; if (write_header) { avformat_free_context(oc); seg->avf = NULL; if ((err = segment_mux_init(s)) < 0) return err; oc = seg->avf; } seg->segment_idx++; if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0)) seg->segment_idx_wrap_nb++; if ((err = set_segment_filename(s)) < 0) return err; if ((err = s->io_open(s, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0) { av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url); return err; } if (!seg->individual_header_trailer) oc->pb->seekable = 0; if (oc->oformat->priv_class && oc->priv_data) av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0); if (write_header) { AVDictionary *options = NULL; av_dict_copy(&options, seg->format_options, 0); av_dict_set(&options, "fflags", "-autobsf", 0); err = avformat_write_header(oc, &options); av_dict_free(&options); if (err < 0) return err; } seg->segment_frame_count = 0; return 0; } static int segment_list_open(AVFormatContext *s) { SegmentContext *seg = s->priv_data; int ret; snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list); ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL); if (ret < 0) { av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list); return ret; } if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) { SegmentListEntry *entry; double max_duration = 0; avio_printf(seg->list_pb, "#EXTM3U\n"); avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n"); avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index); avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n", seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO"); av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index); for (entry = seg->segment_list_entries; entry; entry = entry->next) max_duration = FFMAX(max_duration, entry->end_time - entry->start_time); avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration)); } else if (seg->list_type == LIST_TYPE_FFCONCAT) { avio_printf(seg->list_pb, "ffconcat version 1.0\n"); } return ret; } static void segment_list_print_entry(AVIOContext *list_ioctx, ListType list_type, const SegmentListEntry *list_entry, void *log_ctx) { switch (list_type) { case LIST_TYPE_FLAT: avio_printf(list_ioctx, "%s\n", list_entry->filename); break; case LIST_TYPE_CSV: case LIST_TYPE_EXT: print_csv_escaped_str(list_ioctx, list_entry->filename); avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time); break; case LIST_TYPE_M3U8: avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n", list_entry->end_time - list_entry->start_time, list_entry->filename); break; case LIST_TYPE_FFCONCAT: { char *buf; if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) { av_log(log_ctx, AV_LOG_WARNING, "Error writing list entry '%s' in list file\n", list_entry->filename); return; } avio_printf(list_ioctx, "file %s\n", buf); av_free(buf); break; } default: av_assert0(!"Invalid list type"); } } static int segment_end(AVFormatContext *s, int write_trailer, int is_last) { SegmentContext *seg = s->priv_data; AVFormatContext *oc = seg->avf; int ret = 0; AVTimecode tc; AVRational rate; AVDictionaryEntry *tcr; char buf[AV_TIMECODE_STR_SIZE]; int i; int err; if (!oc || !oc->pb) return AVERROR(EINVAL); av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */ if (write_trailer) ret = av_write_trailer(oc); if (ret < 0) av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n", oc->url); if (seg->list) { if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) { SegmentListEntry *entry = av_mallocz(sizeof(*entry)); if (!entry) { ret = AVERROR(ENOMEM); goto end; } /* append new element */ memcpy(entry, &seg->cur_entry, sizeof(*entry)); entry->filename = av_strdup(entry->filename); if (!seg->segment_list_entries) seg->segment_list_entries = seg->segment_list_entries_end = entry; else seg->segment_list_entries_end->next = entry; seg->segment_list_entries_end = entry; /* drop first item */ if (seg->list_size && seg->segment_count >= seg->list_size) { entry = seg->segment_list_entries; seg->segment_list_entries = seg->segment_list_entries->next; av_freep(&entry->filename); av_freep(&entry); } if ((ret = segment_list_open(s)) < 0) goto end; for (entry = seg->segment_list_entries; entry; entry = entry->next) segment_list_print_entry(seg->list_pb, seg->list_type, entry, s); if (seg->list_type == LIST_TYPE_M3U8 && is_last) avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n"); ff_format_io_close(s, &seg->list_pb); if (seg->use_rename) ff_rename(seg->temp_list_filename, seg->list, s); } else { segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s); avio_flush(seg->list_pb); } } av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n", seg->avf->url, seg->segment_count); seg->segment_count++; if (seg->increment_tc) { tcr = av_dict_get(s->metadata, "timecode", NULL, 0); if (tcr) { /* search the first video stream */ for (i = 0; i < s->nb_streams; i++) { if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */ err = av_timecode_init_from_string(&tc, rate, tcr->value, s); if (err < 0) { av_log(s, AV_LOG_WARNING, "Could not increment global timecode, error occurred during timecode creation.\n"); break; } tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */ av_dict_set(&s->metadata, "timecode", av_timecode_make_string(&tc, buf, 0), 0); break; } } } else { av_log(s, AV_LOG_WARNING, "Could not increment global timecode, no global timecode metadata found.\n"); } for (i = 0; i < s->nb_streams; i++) { if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { char st_buf[AV_TIMECODE_STR_SIZE]; AVTimecode st_tc; AVRational st_rate = s->streams[i]->avg_frame_rate; AVDictionaryEntry *st_tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0); if (st_tcr) { if ((av_timecode_init_from_string(&st_tc, st_rate, st_tcr->value, s) < 0)) { av_log(s, AV_LOG_WARNING, "Could not increment stream %d timecode, error occurred during timecode creation.\n", i); continue; } st_tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(st_rate)); // increment timecode av_dict_set(&s->streams[i]->metadata, "timecode", av_timecode_make_string(&st_tc, st_buf, 0), 0); } } } } end: ff_format_io_close(oc, &oc->pb); return ret; } static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str) { char *p; int i, ret = 0; char *times_str1 = av_strdup(times_str); char *saveptr = NULL; if (!times_str1) return AVERROR(ENOMEM); #define FAIL(err) ret = err; goto end *nb_times = 1; for (p = times_str1; *p; p++) if (*p == ',') (*nb_times)++; *times = av_malloc_array(*nb_times, sizeof(**times)); if (!*times) { av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n"); FAIL(AVERROR(ENOMEM)); } p = times_str1; for (i = 0; i < *nb_times; i++) { int64_t t; char *tstr = av_strtok(p, ",", &saveptr); p = NULL; if (!tstr || !tstr[0]) { av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n", times_str); FAIL(AVERROR(EINVAL)); } ret = av_parse_time(&t, tstr, 1); if (ret < 0) { av_log(log_ctx, AV_LOG_ERROR, "Invalid time duration specification '%s' in times list %s\n", tstr, times_str); FAIL(AVERROR(EINVAL)); } (*times)[i] = t; /* check on monotonicity */ if (i && (*times)[i-1] > (*times)[i]) { av_log(log_ctx, AV_LOG_ERROR, "Specified time %f is smaller than the last time %f\n", (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000); FAIL(AVERROR(EINVAL)); } } end: av_free(times_str1); return ret; } static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str) { const char *p; int i; *nb_frames = 1; for (p = frames_str; *p; p++) if (*p == ',') (*nb_frames)++; *frames = av_malloc_array(*nb_frames, sizeof(**frames)); if (!*frames) { av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n"); return AVERROR(ENOMEM); } p = frames_str; for (i = 0; i < *nb_frames; i++) { long int f; char *tailptr; if (*p == '\0' || *p == ',') { av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n", frames_str); return AVERROR(EINVAL); } f = strtol(p, &tailptr, 10); if (*tailptr != '\0' && *tailptr != ',' || f <= 0 || f >= INT_MAX) { av_log(log_ctx, AV_LOG_ERROR, "Invalid argument '%s', must be a positive integer < INT_MAX\n", p); return AVERROR(EINVAL); } if (*tailptr == ',') tailptr++; p = tailptr; (*frames)[i] = f; /* check on monotonicity */ if (i && (*frames)[i-1] > (*frames)[i]) { av_log(log_ctx, AV_LOG_ERROR, "Specified frame %d is smaller than the last frame %d\n", (*frames)[i], (*frames)[i-1]); return AVERROR(EINVAL); } } return 0; } static int open_null_ctx(AVIOContext **ctx) { int buf_size = 32768; uint8_t *buf = av_malloc(buf_size); if (!buf) return AVERROR(ENOMEM); *ctx = avio_alloc_context(buf, buf_size, 1, NULL, NULL, NULL, NULL); if (!*ctx) { av_free(buf); return AVERROR(ENOMEM); } return 0; } static void close_null_ctxp(AVIOContext **pb) { av_freep(&(*pb)->buffer); avio_context_free(pb); } static int select_reference_stream(AVFormatContext *s) { SegmentContext *seg = s->priv_data; int ret, i; seg->reference_stream_index = -1; if (!strcmp(seg->reference_stream_specifier, "auto")) { /* select first index of type with highest priority */ int type_index_map[AVMEDIA_TYPE_NB]; static const enum AVMediaType type_priority_list[] = { AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_SUBTITLE, AVMEDIA_TYPE_DATA, AVMEDIA_TYPE_ATTACHMENT }; enum AVMediaType type; for (i = 0; i < AVMEDIA_TYPE_NB; i++) type_index_map[i] = -1; /* select first index for each type */ for (i = 0; i < s->nb_streams; i++) { type = s->streams[i]->codecpar->codec_type; if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1 /* ignore attached pictures/cover art streams */ && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC)) type_index_map[type] = i; } for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) { type = type_priority_list[i]; if ((seg->reference_stream_index = type_index_map[type]) >= 0) break; } } else { for (i = 0; i < s->nb_streams; i++) { ret = avformat_match_stream_specifier(s, s->streams[i], seg->reference_stream_specifier); if (ret < 0) return ret; if (ret > 0) { seg->reference_stream_index = i; break; } } } if (seg->reference_stream_index < 0) { av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n", seg->reference_stream_specifier); return AVERROR(EINVAL); } return 0; } static void seg_free(AVFormatContext *s) { SegmentContext *seg = s->priv_data; SegmentListEntry *cur; ff_format_io_close(s, &seg->list_pb); if (seg->avf) { if (seg->is_nullctx) close_null_ctxp(&seg->avf->pb); else ff_format_io_close(s, &seg->avf->pb); avformat_free_context(seg->avf); seg->avf = NULL; } av_freep(&seg->times); av_freep(&seg->frames); av_freep(&seg->cur_entry.filename); cur = seg->segment_list_entries; while (cur) { SegmentListEntry *next = cur->next; av_freep(&cur->filename); av_free(cur); cur = next; } } static int seg_init(AVFormatContext *s) { SegmentContext *seg = s->priv_data; AVFormatContext *oc = seg->avf; AVDictionary *options = NULL; int ret; int i; seg->segment_count = 0; if (!seg->write_header_trailer) seg->individual_header_trailer = 0; if (seg->header_filename) { seg->write_header_trailer = 1; seg->individual_header_trailer = 0; } if (seg->initial_offset > 0) { av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated," "you can use output_ts_offset instead of it\n"); } if ((seg->time != 2000000) + !!seg->times_str + !!seg->frames_str > 1) { av_log(s, AV_LOG_ERROR, "segment_time, segment_times, and segment_frames options " "are mutually exclusive, select just one of them\n"); return AVERROR(EINVAL); } if (seg->times_str || seg->frames_str) seg->min_seg_duration = 0; if (seg->times_str) { if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0) return ret; } else if (seg->frames_str) { if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0) return ret; } else { if (seg->use_clocktime) { if (seg->time <= 0) { av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n"); return AVERROR(EINVAL); } seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time); } if (seg->min_seg_duration > seg->time) { av_log(s, AV_LOG_ERROR, "min_seg_duration cannot be greater than segment_time\n"); return AVERROR(EINVAL); } } if (seg->list) { if (seg->list_type == LIST_TYPE_UNDEFINED) { if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV; else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT; else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8; else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT; else seg->list_type = LIST_TYPE_FLAT; } if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) { if ((ret = segment_list_open(s)) < 0) return ret; } else { const char *proto = avio_find_protocol_name(seg->list); seg->use_rename = proto && !strcmp(proto, "file"); } } if (seg->list_type == LIST_TYPE_EXT) av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n"); if ((ret = select_reference_stream(s)) < 0) return ret; av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n", seg->reference_stream_index, av_get_media_type_string(s->streams[seg->reference_stream_index]->codecpar->codec_type)); seg->reference_stream_first_pts = AV_NOPTS_VALUE; seg->oformat = av_guess_format(seg->format, s->url, NULL); if (!seg->oformat) return AVERROR_MUXER_NOT_FOUND; if (seg->oformat->flags & AVFMT_NOFILE) { av_log(s, AV_LOG_ERROR, "format %s not supported.\n", seg->oformat->name); return AVERROR(EINVAL); } if ((ret = segment_mux_init(s)) < 0) return ret; if ((ret = set_segment_filename(s)) < 0) return ret; oc = seg->avf; if (seg->write_header_trailer) { if ((ret = s->io_open(s, &oc->pb, seg->header_filename ? seg->header_filename : oc->url, AVIO_FLAG_WRITE, NULL)) < 0) { av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url); return ret; } if (!seg->individual_header_trailer) oc->pb->seekable = 0; } else { if ((ret = open_null_ctx(&oc->pb)) < 0) return ret; seg->is_nullctx = 1; } av_dict_copy(&options, seg->format_options, 0); av_dict_set(&options, "fflags", "-autobsf", 0); ret = avformat_init_output(oc, &options); if (av_dict_count(options)) { av_log(s, AV_LOG_ERROR, "Some of the provided format options are not recognized\n"); av_dict_free(&options); return AVERROR(EINVAL); } av_dict_free(&options); if (ret < 0) { return ret; } seg->segment_frame_count = 0; av_assert0(s->nb_streams == oc->nb_streams); if (ret == AVSTREAM_INIT_IN_WRITE_HEADER) { ret = avformat_write_header(oc, NULL); if (ret < 0) return ret; seg->header_written = 1; } for (i = 0; i < s->nb_streams; i++) { AVStream *inner_st = oc->streams[i]; AVStream *outer_st = s->streams[i]; avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den); } if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0) s->avoid_negative_ts = 1; return ret; } static int seg_write_header(AVFormatContext *s) { SegmentContext *seg = s->priv_data; AVFormatContext *oc = seg->avf; int ret; if (!seg->header_written) { ret = avformat_write_header(oc, NULL); if (ret < 0) return ret; } if (!seg->write_header_trailer || seg->header_filename) { if (seg->header_filename) { av_write_frame(oc, NULL); ff_format_io_close(oc, &oc->pb); } else { close_null_ctxp(&oc->pb); seg->is_nullctx = 0; } if ((ret = oc->io_open(oc, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0) return ret; if (!seg->individual_header_trailer) oc->pb->seekable = 0; } return 0; } static int seg_write_packet(AVFormatContext *s, AVPacket *pkt) { SegmentContext *seg = s->priv_data; AVStream *st = s->streams[pkt->stream_index]; int64_t end_pts = INT64_MAX, offset, pkt_pts_avtb; int start_frame = INT_MAX; int ret; struct tm ti; int64_t usecs; int64_t wrapped_val; if (!seg->avf || !seg->avf->pb) return AVERROR(EINVAL); if (!st->codecpar->extradata_size) { size_t pkt_extradata_size; uint8_t *pkt_extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &pkt_extradata_size); if (pkt_extradata && pkt_extradata_size > 0) { ret = ff_alloc_extradata(st->codecpar, pkt_extradata_size); if (ret < 0) { av_log(s, AV_LOG_WARNING, "Unable to add extradata to stream. Output segments may be invalid.\n"); goto calc_times; } memcpy(st->codecpar->extradata, pkt_extradata, pkt_extradata_size); } } calc_times: if (seg->times) { end_pts = seg->segment_count < seg->nb_times ? seg->times[seg->segment_count] : INT64_MAX; } else if (seg->frames) { start_frame = seg->segment_count < seg->nb_frames ? seg->frames[seg->segment_count] : INT_MAX; } else { if (seg->use_clocktime) { int64_t avgt = av_gettime(); time_t sec = avgt / 1000000; localtime_r(&sec, &ti); usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000); wrapped_val = (usecs + seg->clocktime_offset) % seg->time; if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration) seg->cut_pending = 1; seg->last_val = wrapped_val; } else { end_pts = seg->time * (seg->segment_count + 1); } } ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n", pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), av_ts2timestr(pkt->duration, &st->time_base), pkt->flags & AV_PKT_FLAG_KEY, pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1); if (seg->reference_stream_first_pts == AV_NOPTS_VALUE && pkt->stream_index == seg->reference_stream_index && pkt->pts != AV_NOPTS_VALUE) { seg->reference_stream_first_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q); } if (seg->reference_stream_first_pts != AV_NOPTS_VALUE) { end_pts += (INT64_MAX - end_pts >= seg->reference_stream_first_pts) ? seg->reference_stream_first_pts : INT64_MAX - end_pts; } if (pkt->pts != AV_NOPTS_VALUE) pkt_pts_avtb = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q); if (pkt->stream_index == seg->reference_stream_index && (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) && (seg->segment_frame_count > 0 || seg->write_empty) && (seg->cut_pending || seg->frame_count >= start_frame || (pkt->pts != AV_NOPTS_VALUE && pkt_pts_avtb - seg->cur_entry.start_pts >= seg->min_seg_duration && av_compare_ts(pkt->pts, st->time_base, end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) { /* sanitize end time in case last packet didn't have a defined duration */ if (seg->cur_entry.last_duration == 0) seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base); if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0) goto fail; if ((ret = segment_start(s, seg->individual_header_trailer)) < 0) goto fail; seg->cut_pending = 0; seg->cur_entry.index = seg->segment_idx + seg->segment_idx_wrap * seg->segment_idx_wrap_nb; seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base); seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q); seg->cur_entry.end_time = seg->cur_entry.start_time; if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty) goto calc_times; } if (pkt->stream_index == seg->reference_stream_index) { if (pkt->pts != AV_NOPTS_VALUE) seg->cur_entry.end_time = FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base)); seg->cur_entry.last_duration = pkt->duration; } if (seg->segment_frame_count == 0) { av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n", seg->avf->url, pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count); } av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s", pkt->stream_index, av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q), av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base)); /* compute new timestamps */ offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0), AV_TIME_BASE_Q, st->time_base); if (pkt->pts != AV_NOPTS_VALUE) pkt->pts += offset; if (pkt->dts != AV_NOPTS_VALUE) pkt->dts += offset; av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n", av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base)); ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps || ffofmt(seg->avf->oformat)->interleave_packet); fail: /* Use st->index here as the packet returned from ff_write_chained() * is blank if interleaving has been used. */ if (st->index == seg->reference_stream_index) { seg->frame_count++; seg->segment_frame_count++; } return ret; } static int seg_write_trailer(struct AVFormatContext *s) { SegmentContext *seg = s->priv_data; AVFormatContext *oc = seg->avf; int ret; if (!oc) return 0; if (!seg->write_header_trailer) { if ((ret = segment_end(s, 0, 1)) < 0) return ret; if ((ret = open_null_ctx(&oc->pb)) < 0) return ret; seg->is_nullctx = 1; ret = av_write_trailer(oc); } else { ret = segment_end(s, 1, 1); } return ret; } static int seg_check_bitstream(AVFormatContext *s, AVStream *st, const AVPacket *pkt) { SegmentContext *seg = s->priv_data; AVFormatContext *oc = seg->avf; if (ffofmt(oc->oformat)->check_bitstream) { AVStream *const ost = oc->streams[st->index]; int ret = ffofmt(oc->oformat)->check_bitstream(oc, ost, pkt); if (ret == 1) { FFStream *const sti = ffstream(st); FFStream *const osti = ffstream(ost); sti->bsfc = osti->bsfc; osti->bsfc = NULL; } return ret; } return 1; } #define OFFSET(x) offsetof(SegmentContext, x) #define E AV_OPT_FLAG_ENCODING_PARAM static const AVOption options[] = { { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, 0, 0, E }, { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, { "segment_format_options", "set list of options for the container format used for the segments", OFFSET(format_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E }, { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, { "segment_list_flags","set flags affecting segment list generation", OFFSET(list_flags), AV_OPT_TYPE_FLAGS, {.i64 = SEGMENT_LIST_FLAG_CACHE }, 0, UINT_MAX, E, .unit = "list_flags"}, { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, .unit = "list_flags"}, { "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, .unit = "list_flags"}, { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, { "segment_list_type", "set the segment list type", OFFSET(list_type), AV_OPT_TYPE_INT, {.i64 = LIST_TYPE_UNDEFINED}, -1, LIST_TYPE_NB-1, E, .unit = "list_type" }, { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, .unit = "list_type" }, { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, .unit = "list_type" }, { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, .unit = "list_type" }, { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, .unit = "list_type" }, { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, .unit = "list_type" }, { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, .unit = "list_type" }, { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E}, { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E}, { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E}, { "segment_time", "set segment duration", OFFSET(time),AV_OPT_TYPE_DURATION, {.i64 = 2000000}, INT64_MIN, INT64_MAX, E }, { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, E }, { "min_seg_duration", "set minimum segment duration", OFFSET(min_seg_duration), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, E }, { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E }, { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E }, { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, { "segment_wrap_number", "set the number of wrap before the first segment", OFFSET(segment_idx_wrap_nb), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E }, { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E }, { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E }, { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E }, { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E }, { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E }, { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E }, { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E }, { NULL }, }; static const AVClass seg_class = { .class_name = "(stream) segment muxer", .option = options, .version = LIBAVUTIL_VERSION_INT, }; #if CONFIG_SEGMENT_MUXER const FFOutputFormat ff_segment_muxer = { .p.name = "segment", .p.long_name = NULL_IF_CONFIG_SMALL("segment"), .p.flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER, .p.priv_class = &seg_class, .priv_data_size = sizeof(SegmentContext), .init = seg_init, .write_header = seg_write_header, .write_packet = seg_write_packet, .write_trailer = seg_write_trailer, .deinit = seg_free, .check_bitstream = seg_check_bitstream, }; #endif #if CONFIG_STREAM_SEGMENT_MUXER const FFOutputFormat ff_stream_segment_muxer = { .p.name = "stream_segment,ssegment", .p.long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"), .p.flags = AVFMT_NOFILE, .p.priv_class = &seg_class, .priv_data_size = sizeof(SegmentContext), .init = seg_init, .write_header = seg_write_header, .write_packet = seg_write_packet, .write_trailer = seg_write_trailer, .deinit = seg_free, .check_bitstream = seg_check_bitstream, }; #endif