From 1920382aa9f21d7ed1a3c2214990da8d2b067a92 Mon Sep 17 00:00:00 2001 From: Peter Große Date: Sun, 29 Jan 2017 20:41:22 +0100 Subject: dashenc: add option to provide UTC timing source MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If set, adds a UTCTiming tag in the manifest. This is part of the recommendations listed in the "Guidelines for Implementations: DASH-IF Interoperability Points" [1][2] Section 4.7 describes means for the Availability Time Synchronization. A usable default is "https://time.akamai.com/?iso" [1] http://dashif.org/guidelines/ [2] http://dashif.org/wp-content/uploads/2016/12/DASH-IF-IOP-v4.0-clean.pdf (current version as of writing) Signed-off-by: Peter Große Signed-off-by: Martin Storsjö --- libavformat/dashenc.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'libavformat') diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c index 44785cd90d..198932caa4 100644 --- a/libavformat/dashenc.c +++ b/libavformat/dashenc.c @@ -94,6 +94,7 @@ typedef struct DASHContext { const char *single_file_name; const char *init_seg_name; const char *media_seg_name; + const char *utc_timing_url; } DASHContext; static int dash_write(void *opaque, uint8_t *buf, int buf_size) @@ -490,6 +491,9 @@ static int write_manifest(AVFormatContext *s, int final) av_free(escaped); } avio_printf(out, "\t\n"); + if (c->utc_timing_url) + avio_printf(out, "\t\n", c->utc_timing_url); + if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) { OutputStream *os = &c->streams[0]; int start_index = FFMAX(os->nb_segments - c->window_size, 0); @@ -981,6 +985,7 @@ static const AVOption options[] = { { "single_file_name", "DASH-templated name to be used for baseURL. Implies storing all segments in one file, accessed using byte ranges", OFFSET(single_file_name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E }, { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.m4s"}, 0, 0, E }, { "media_seg_name", "DASH-templated name to used for the media segments", OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str = "chunk-stream$RepresentationID$-$Number%05d$.m4s"}, 0, 0, E }, + { "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 }, { NULL }, }; -- cgit v1.2.3