diff options
| author | Peter Große <pegro@friiks.de> | 2017-01-29 20:41:22 +0100 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2017-01-31 00:08:09 +0200 |
| commit | 1920382aa9f21d7ed1a3c2214990da8d2b067a92 (patch) | |
| tree | 18501eb7dbb882cf6ab6d158a82b08dca99b5bdb | |
| parent | ba6a49e60bdd61b6d02c2b26daa01942c35f39cc (diff) | |
dashenc: add option to provide UTC timing source
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 <pegro@friiks.de>
Signed-off-by: Martin Storsjö <martin@martin.st>
| -rw-r--r-- | libavformat/dashenc.c | 5 |
1 files changed, 5 insertions, 0 deletions
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</ProgramInformation>\n"); + if (c->utc_timing_url) + avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\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 }, }; |