| /* |
| * WebM DASH Manifest XML muxer |
| * Copyright (c) 2014 Vignesh Venkatasubramanian |
| * |
| * 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 |
| */ |
| |
| /* |
| * WebM DASH Specification: |
| * https://sites.google.com/a/webmproject.org/wiki/adaptive-streaming/webm-dash-specification |
| * ISO DASH Specification: |
| * http://standards.iso.org/ittf/PubliclyAvailableStandards/c065274_ISO_IEC_23009-1_2014.zip |
| */ |
| |
| #include <float.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| #include "avformat.h" |
| #include "avio_internal.h" |
| #include "matroska.h" |
| |
| #include "libavutil/avstring.h" |
| #include "libavutil/dict.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/time_internal.h" |
| |
| typedef struct AdaptationSet { |
| char id[10]; |
| int *streams; |
| int nb_streams; |
| } AdaptationSet; |
| |
| typedef struct WebMDashMuxContext { |
| const AVClass *class; |
| char *adaptation_sets; |
| AdaptationSet *as; |
| int nb_as; |
| int representation_id; |
| int is_live; |
| int chunk_start_index; |
| int chunk_duration; |
| char *utc_timing_url; |
| double time_shift_buffer_depth; |
| int minimum_update_period; |
| int debug_mode; |
| } WebMDashMuxContext; |
| |
| static const char *get_codec_name(int codec_id) |
| { |
| switch (codec_id) { |
| case AV_CODEC_ID_VP8: |
| return "vp8"; |
| case AV_CODEC_ID_VP9: |
| return "vp9"; |
| case AV_CODEC_ID_VORBIS: |
| return "vorbis"; |
| case AV_CODEC_ID_OPUS: |
| return "opus"; |
| } |
| return NULL; |
| } |
| |
| static double get_duration(AVFormatContext *s) |
| { |
| int i = 0; |
| double max = 0.0; |
| for (i = 0; i < s->nb_streams; i++) { |
| AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, |
| DURATION, NULL, 0); |
| if (!duration || atof(duration->value) < 0) continue; |
| if (atof(duration->value) > max) max = atof(duration->value); |
| } |
| return max / 1000; |
| } |
| |
| static int write_header(AVFormatContext *s) |
| { |
| WebMDashMuxContext *w = s->priv_data; |
| double min_buffer_time = 1.0; |
| avio_printf(s->pb, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"); |
| avio_printf(s->pb, "<MPD\n"); |
| avio_printf(s->pb, " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"); |
| avio_printf(s->pb, " xmlns=\"urn:mpeg:DASH:schema:MPD:2011\"\n"); |
| avio_printf(s->pb, " xsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011\"\n"); |
| avio_printf(s->pb, " type=\"%s\"\n", w->is_live ? "dynamic" : "static"); |
| if (!w->is_live) { |
| avio_printf(s->pb, " mediaPresentationDuration=\"PT%gS\"\n", |
| get_duration(s)); |
| } |
| avio_printf(s->pb, " minBufferTime=\"PT%gS\"\n", min_buffer_time); |
| avio_printf(s->pb, " profiles=\"%s\"%s", |
| w->is_live ? "urn:mpeg:dash:profile:isoff-live:2011" : "urn:webm:dash:profile:webm-on-demand:2012", |
| w->is_live ? "\n" : ">\n"); |
| if (w->is_live) { |
| time_t local_time = time(NULL); |
| struct tm gmt_buffer; |
| struct tm *gmt = gmtime_r(&local_time, &gmt_buffer); |
| char gmt_iso[21]; |
| if (!strftime(gmt_iso, 21, "%Y-%m-%dT%H:%M:%SZ", gmt)) { |
| return AVERROR_UNKNOWN; |
| } |
| if (w->debug_mode) { |
| av_strlcpy(gmt_iso, "", 1); |
| } |
| avio_printf(s->pb, " availabilityStartTime=\"%s\"\n", gmt_iso); |
| avio_printf(s->pb, " timeShiftBufferDepth=\"PT%gS\"\n", w->time_shift_buffer_depth); |
| avio_printf(s->pb, " minimumUpdatePeriod=\"PT%dS\"", w->minimum_update_period); |
| avio_printf(s->pb, ">\n"); |
| if (w->utc_timing_url) { |
| avio_printf(s->pb, "<UTCTiming\n"); |
| avio_printf(s->pb, " schemeIdUri=\"urn:mpeg:dash:utc:http-iso:2014\"\n"); |
| avio_printf(s->pb, " value=\"%s\"/>\n", w->utc_timing_url); |
| } |
| } |
| return 0; |
| } |
| |
| static void write_footer(AVFormatContext *s) |
| { |
| avio_printf(s->pb, "</MPD>\n"); |
| } |
| |
| static int subsegment_alignment(AVFormatContext *s, AdaptationSet *as) { |
| int i; |
| AVDictionaryEntry *gold = av_dict_get(s->streams[as->streams[0]]->metadata, |
| CUE_TIMESTAMPS, NULL, 0); |
| if (!gold) return 0; |
| for (i = 1; i < as->nb_streams; i++) { |
| AVDictionaryEntry *ts = av_dict_get(s->streams[as->streams[i]]->metadata, |
| CUE_TIMESTAMPS, NULL, 0); |
| if (!ts || strncmp(gold->value, ts->value, strlen(gold->value))) return 0; |
| } |
| return 1; |
| } |
| |
| static int bitstream_switching(AVFormatContext *s, AdaptationSet *as) { |
| int i; |
| AVDictionaryEntry *gold_track_num = av_dict_get(s->streams[as->streams[0]]->metadata, |
| TRACK_NUMBER, NULL, 0); |
| AVCodecContext *gold_codec = s->streams[as->streams[0]]->codec; |
| if (!gold_track_num) return 0; |
| for (i = 1; i < as->nb_streams; i++) { |
| AVDictionaryEntry *track_num = av_dict_get(s->streams[as->streams[i]]->metadata, |
| TRACK_NUMBER, NULL, 0); |
| AVCodecContext *codec = s->streams[as->streams[i]]->codec; |
| if (!track_num || |
| strncmp(gold_track_num->value, track_num->value, strlen(gold_track_num->value)) || |
| gold_codec->codec_id != codec->codec_id || |
| gold_codec->extradata_size != codec->extradata_size || |
| memcmp(gold_codec->extradata, codec->extradata, codec->extradata_size)) { |
| return 0; |
| } |
| } |
| return 1; |
| } |
| |
| /* |
| * Writes a Representation within an Adaptation Set. Returns 0 on success and |
| * < 0 on failure. |
| */ |
| static int write_representation(AVFormatContext *s, AVStream *stream, char *id, |
| int output_width, int output_height, |
| int output_sample_rate) { |
| WebMDashMuxContext *w = s->priv_data; |
| AVDictionaryEntry *irange = av_dict_get(stream->metadata, INITIALIZATION_RANGE, NULL, 0); |
| AVDictionaryEntry *cues_start = av_dict_get(stream->metadata, CUES_START, NULL, 0); |
| AVDictionaryEntry *cues_end = av_dict_get(stream->metadata, CUES_END, NULL, 0); |
| AVDictionaryEntry *filename = av_dict_get(stream->metadata, FILENAME, NULL, 0); |
| AVDictionaryEntry *bandwidth = av_dict_get(stream->metadata, BANDWIDTH, NULL, 0); |
| if ((w->is_live && (!filename)) || |
| (!w->is_live && (!irange || !cues_start || !cues_end || !filename || !bandwidth))) { |
| return AVERROR_INVALIDDATA; |
| } |
| avio_printf(s->pb, "<Representation id=\"%s\"", id); |
| // FIXME: For live, This should be obtained from the input file or as an AVOption. |
| avio_printf(s->pb, " bandwidth=\"%s\"", |
| w->is_live ? (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO ? "128000" : "1000000") : bandwidth->value); |
| if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO && output_width) |
| avio_printf(s->pb, " width=\"%d\"", stream->codec->width); |
| if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO && output_height) |
| avio_printf(s->pb, " height=\"%d\"", stream->codec->height); |
| if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO && output_sample_rate) |
| avio_printf(s->pb, " audioSamplingRate=\"%d\"", stream->codec->sample_rate); |
| if (w->is_live) { |
| // For live streams, Codec and Mime Type always go in the Representation tag. |
| avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(stream->codec->codec_id)); |
| avio_printf(s->pb, " mimeType=\"%s/webm\"", |
| stream->codec->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio"); |
| // For live streams, subsegments always start with key frames. So this |
| // is always 1. |
| avio_printf(s->pb, " startsWithSAP=\"1\""); |
| avio_printf(s->pb, ">"); |
| } else { |
| avio_printf(s->pb, ">\n"); |
| avio_printf(s->pb, "<BaseURL>%s</BaseURL>\n", filename->value); |
| avio_printf(s->pb, "<SegmentBase\n"); |
| avio_printf(s->pb, " indexRange=\"%s-%s\">\n", cues_start->value, cues_end->value); |
| avio_printf(s->pb, "<Initialization\n"); |
| avio_printf(s->pb, " range=\"0-%s\" />\n", irange->value); |
| avio_printf(s->pb, "</SegmentBase>\n"); |
| } |
| avio_printf(s->pb, "</Representation>\n"); |
| return 0; |
| } |
| |
| /* |
| * Checks if width of all streams are the same. Returns 1 if true, 0 otherwise. |
| */ |
| static int check_matching_width(AVFormatContext *s, AdaptationSet *as) { |
| int first_width, i; |
| if (as->nb_streams < 2) return 1; |
| first_width = s->streams[as->streams[0]]->codec->width; |
| for (i = 1; i < as->nb_streams; i++) |
| if (first_width != s->streams[as->streams[i]]->codec->width) |
| return 0; |
| return 1; |
| } |
| |
| /* |
| * Checks if height of all streams are the same. Returns 1 if true, 0 otherwise. |
| */ |
| static int check_matching_height(AVFormatContext *s, AdaptationSet *as) { |
| int first_height, i; |
| if (as->nb_streams < 2) return 1; |
| first_height = s->streams[as->streams[0]]->codec->height; |
| for (i = 1; i < as->nb_streams; i++) |
| if (first_height != s->streams[as->streams[i]]->codec->height) |
| return 0; |
| return 1; |
| } |
| |
| /* |
| * Checks if sample rate of all streams are the same. Returns 1 if true, 0 otherwise. |
| */ |
| static int check_matching_sample_rate(AVFormatContext *s, AdaptationSet *as) { |
| int first_sample_rate, i; |
| if (as->nb_streams < 2) return 1; |
| first_sample_rate = s->streams[as->streams[0]]->codec->sample_rate; |
| for (i = 1; i < as->nb_streams; i++) |
| if (first_sample_rate != s->streams[as->streams[i]]->codec->sample_rate) |
| return 0; |
| return 1; |
| } |
| |
| static void free_adaptation_sets(AVFormatContext *s) { |
| WebMDashMuxContext *w = s->priv_data; |
| int i; |
| for (i = 0; i < w->nb_as; i++) { |
| av_freep(&w->as[i].streams); |
| } |
| av_freep(&w->as); |
| w->nb_as = 0; |
| } |
| |
| /* |
| * Parses a live header filename and computes the representation id, |
| * initialization pattern and the media pattern. Pass NULL if you don't want to |
| * compute any of those 3. Returns 0 on success and non-zero on failure. |
| * |
| * Name of the header file should conform to the following pattern: |
| * <file_description>_<representation_id>.hdr where <file_description> can be |
| * anything. The chunks should be named according to the following pattern: |
| * <file_description>_<representation_id>_<chunk_number>.chk |
| */ |
| static int parse_filename(char *filename, char **representation_id, |
| char **initialization_pattern, char **media_pattern) { |
| char *underscore_pos = NULL; |
| char *period_pos = NULL; |
| char *temp_pos = NULL; |
| char *filename_str = av_strdup(filename); |
| if (!filename_str) return AVERROR(ENOMEM); |
| temp_pos = av_stristr(filename_str, "_"); |
| while (temp_pos) { |
| underscore_pos = temp_pos + 1; |
| temp_pos = av_stristr(temp_pos + 1, "_"); |
| } |
| if (!underscore_pos) return AVERROR_INVALIDDATA; |
| period_pos = av_stristr(underscore_pos, "."); |
| if (!period_pos) return AVERROR_INVALIDDATA; |
| *(underscore_pos - 1) = 0; |
| if (representation_id) { |
| *representation_id = av_malloc(period_pos - underscore_pos + 1); |
| if (!(*representation_id)) return AVERROR(ENOMEM); |
| av_strlcpy(*representation_id, underscore_pos, period_pos - underscore_pos + 1); |
| } |
| if (initialization_pattern) { |
| *initialization_pattern = av_asprintf("%s_$RepresentationID$.hdr", |
| filename_str); |
| if (!(*initialization_pattern)) return AVERROR(ENOMEM); |
| } |
| if (media_pattern) { |
| *media_pattern = av_asprintf("%s_$RepresentationID$_$Number$.chk", |
| filename_str); |
| if (!(*media_pattern)) return AVERROR(ENOMEM); |
| } |
| av_free(filename_str); |
| return 0; |
| } |
| |
| /* |
| * Writes an Adaptation Set. Returns 0 on success and < 0 on failure. |
| */ |
| static int write_adaptation_set(AVFormatContext *s, int as_index) |
| { |
| WebMDashMuxContext *w = s->priv_data; |
| AdaptationSet *as = &w->as[as_index]; |
| AVCodecContext *codec = s->streams[as->streams[0]]->codec; |
| AVDictionaryEntry *lang; |
| int i; |
| static const char boolean[2][6] = { "false", "true" }; |
| int subsegmentStartsWithSAP = 1; |
| |
| // Width, Height and Sample Rate will go in the AdaptationSet tag if they |
| // are the same for all contained Representations. otherwise, they will go |
| // on their respective Representation tag. For live streams, they always go |
| // in the Representation tag. |
| int width_in_as = 1, height_in_as = 1, sample_rate_in_as = 1; |
| if (codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| width_in_as = !w->is_live && check_matching_width(s, as); |
| height_in_as = !w->is_live && check_matching_height(s, as); |
| } else { |
| sample_rate_in_as = !w->is_live && check_matching_sample_rate(s, as); |
| } |
| |
| avio_printf(s->pb, "<AdaptationSet id=\"%s\"", as->id); |
| avio_printf(s->pb, " mimeType=\"%s/webm\"", |
| codec->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio"); |
| avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(codec->codec_id)); |
| |
| lang = av_dict_get(s->streams[as->streams[0]]->metadata, "language", NULL, 0); |
| if (lang) avio_printf(s->pb, " lang=\"%s\"", lang->value); |
| |
| if (codec->codec_type == AVMEDIA_TYPE_VIDEO && width_in_as) |
| avio_printf(s->pb, " width=\"%d\"", codec->width); |
| if (codec->codec_type == AVMEDIA_TYPE_VIDEO && height_in_as) |
| avio_printf(s->pb, " height=\"%d\"", codec->height); |
| if (codec->codec_type == AVMEDIA_TYPE_AUDIO && sample_rate_in_as) |
| avio_printf(s->pb, " audioSamplingRate=\"%d\"", codec->sample_rate); |
| |
| avio_printf(s->pb, " bitstreamSwitching=\"%s\"", |
| boolean[bitstream_switching(s, as)]); |
| avio_printf(s->pb, " subsegmentAlignment=\"%s\"", |
| boolean[w->is_live || subsegment_alignment(s, as)]); |
| |
| for (i = 0; i < as->nb_streams; i++) { |
| AVDictionaryEntry *kf = av_dict_get(s->streams[as->streams[i]]->metadata, |
| CLUSTER_KEYFRAME, NULL, 0); |
| if (!w->is_live && (!kf || !strncmp(kf->value, "0", 1))) subsegmentStartsWithSAP = 0; |
| } |
| avio_printf(s->pb, " subsegmentStartsWithSAP=\"%d\"", subsegmentStartsWithSAP); |
| avio_printf(s->pb, ">\n"); |
| |
| if (w->is_live) { |
| AVDictionaryEntry *filename = |
| av_dict_get(s->streams[as->streams[0]]->metadata, FILENAME, NULL, 0); |
| char *initialization_pattern = NULL; |
| char *media_pattern = NULL; |
| int ret = parse_filename(filename->value, NULL, &initialization_pattern, |
| &media_pattern); |
| if (ret) return ret; |
| avio_printf(s->pb, "<ContentComponent id=\"1\" type=\"%s\"/>\n", |
| codec->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio"); |
| avio_printf(s->pb, "<SegmentTemplate"); |
| avio_printf(s->pb, " timescale=\"1000\""); |
| avio_printf(s->pb, " duration=\"%d\"", w->chunk_duration); |
| avio_printf(s->pb, " media=\"%s\"", media_pattern); |
| avio_printf(s->pb, " startNumber=\"%d\"", w->chunk_start_index); |
| avio_printf(s->pb, " initialization=\"%s\"", initialization_pattern); |
| avio_printf(s->pb, "/>\n"); |
| av_free(initialization_pattern); |
| av_free(media_pattern); |
| } |
| |
| for (i = 0; i < as->nb_streams; i++) { |
| char *representation_id = NULL; |
| int ret; |
| if (w->is_live) { |
| AVDictionaryEntry *filename = |
| av_dict_get(s->streams[as->streams[i]]->metadata, FILENAME, NULL, 0); |
| if (!filename) |
| return AVERROR(EINVAL); |
| if (ret = parse_filename(filename->value, &representation_id, NULL, NULL)) |
| return ret; |
| } else { |
| representation_id = av_asprintf("%d", w->representation_id++); |
| if (!representation_id) return AVERROR(ENOMEM); |
| } |
| ret = write_representation(s, s->streams[as->streams[i]], |
| representation_id, !width_in_as, |
| !height_in_as, !sample_rate_in_as); |
| av_free(representation_id); |
| if (ret) return ret; |
| } |
| avio_printf(s->pb, "</AdaptationSet>\n"); |
| return 0; |
| } |
| |
| static int to_integer(char *p, int len) |
| { |
| int ret; |
| char *q = av_malloc(sizeof(char) * len); |
| if (!q) |
| return AVERROR(ENOMEM); |
| av_strlcpy(q, p, len); |
| ret = atoi(q); |
| av_free(q); |
| return ret; |
| } |
| |
| static int parse_adaptation_sets(AVFormatContext *s) |
| { |
| WebMDashMuxContext *w = s->priv_data; |
| char *p = w->adaptation_sets; |
| char *q; |
| enum { new_set, parsed_id, parsing_streams } state; |
| // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on |
| state = new_set; |
| while (p < w->adaptation_sets + strlen(w->adaptation_sets)) { |
| if (*p == ' ') |
| continue; |
| else if (state == new_set && !strncmp(p, "id=", 3)) { |
| void *mem = av_realloc(w->as, sizeof(*w->as) * (w->nb_as + 1)); |
| if (mem == NULL) |
| return AVERROR(ENOMEM); |
| w->as = mem; |
| ++w->nb_as; |
| w->as[w->nb_as - 1].nb_streams = 0; |
| w->as[w->nb_as - 1].streams = NULL; |
| p += 3; // consume "id=" |
| q = w->as[w->nb_as - 1].id; |
| while (*p != ',') *q++ = *p++; |
| *q = 0; |
| p++; |
| state = parsed_id; |
| } else if (state == parsed_id && !strncmp(p, "streams=", 8)) { |
| p += 8; // consume "streams=" |
| state = parsing_streams; |
| } else if (state == parsing_streams) { |
| struct AdaptationSet *as = &w->as[w->nb_as - 1]; |
| q = p; |
| while (*q != '\0' && *q != ',' && *q != ' ') q++; |
| as->streams = av_realloc(as->streams, sizeof(*as->streams) * ++as->nb_streams); |
| if (as->streams == NULL) |
| return AVERROR(ENOMEM); |
| as->streams[as->nb_streams - 1] = to_integer(p, q - p + 1); |
| if (as->streams[as->nb_streams - 1] < 0) return -1; |
| if (*q == '\0') break; |
| if (*q == ' ') state = new_set; |
| p = ++q; |
| } else { |
| return -1; |
| } |
| } |
| return 0; |
| } |
| |
| static int webm_dash_manifest_write_header(AVFormatContext *s) |
| { |
| int i; |
| double start = 0.0; |
| int ret; |
| WebMDashMuxContext *w = s->priv_data; |
| ret = parse_adaptation_sets(s); |
| if (ret < 0) { |
| goto fail; |
| } |
| ret = write_header(s); |
| if (ret < 0) { |
| goto fail; |
| } |
| avio_printf(s->pb, "<Period id=\"0\""); |
| avio_printf(s->pb, " start=\"PT%gS\"", start); |
| if (!w->is_live) { |
| avio_printf(s->pb, " duration=\"PT%gS\"", get_duration(s)); |
| } |
| avio_printf(s->pb, " >\n"); |
| |
| for (i = 0; i < w->nb_as; i++) { |
| ret = write_adaptation_set(s, i); |
| if (ret < 0) { |
| goto fail; |
| } |
| } |
| |
| avio_printf(s->pb, "</Period>\n"); |
| write_footer(s); |
| fail: |
| free_adaptation_sets(s); |
| return ret < 0 ? ret : 0; |
| } |
| |
| static int webm_dash_manifest_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| return AVERROR_EOF; |
| } |
| |
| static int webm_dash_manifest_write_trailer(AVFormatContext *s) |
| { |
| free_adaptation_sets(s); |
| return 0; |
| } |
| |
| #define OFFSET(x) offsetof(WebMDashMuxContext, x) |
| static const AVOption options[] = { |
| { "adaptation_sets", "Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on", OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
| { "debug_mode", "[private option - users should never set this]. Create deterministic output", OFFSET(debug_mode), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM }, |
| { "live", "create a live stream manifest", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM }, |
| { "chunk_start_index", "start index of the chunk", OFFSET(chunk_start_index), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, |
| { "chunk_duration_ms", "duration of each chunk (in milliseconds)", OFFSET(chunk_duration), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, |
| { "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
| { "time_shift_buffer_depth", "Smallest time (in seconds) shifting buffer for which any Representation is guaranteed to be available.", OFFSET(time_shift_buffer_depth), AV_OPT_TYPE_DOUBLE, { .dbl = 60.0 }, 1.0, DBL_MAX, AV_OPT_FLAG_ENCODING_PARAM }, |
| { "minimum_update_period", "Minimum Update Period (in seconds) of the manifest.", OFFSET(minimum_update_period), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, |
| { NULL }, |
| }; |
| |
| #if CONFIG_WEBM_DASH_MANIFEST_MUXER |
| static const AVClass webm_dash_class = { |
| .class_name = "WebM DASH Manifest muxer", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVOutputFormat ff_webm_dash_manifest_muxer = { |
| .name = "webm_dash_manifest", |
| .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"), |
| .mime_type = "application/xml", |
| .extensions = "xml", |
| .priv_data_size = sizeof(WebMDashMuxContext), |
| .write_header = webm_dash_manifest_write_header, |
| .write_packet = webm_dash_manifest_write_packet, |
| .write_trailer = webm_dash_manifest_write_trailer, |
| .priv_class = &webm_dash_class, |
| }; |
| #endif |
