[FFmpeg-devel] [PATCH] libavformat/dashenc.c:support mpd update period

[Siyuan Huang]

Add patch file 

 

From: Siyuan Huang <saber.huang at samsung.com> 
Sent: 2020年6月30日 11:34
To: 'ffmpeg-devel at ffmpeg.org' <ffmpeg-devel at ffmpeg.org>
Subject: [PATCH] libavformat/dashenc.c:support mpd update period

 

From: Siyuan Huang <saber.huang at samsung.com <mailto:saber.huang at samsung.com>
>

 

according iso 23009-1 , in live cases , mpd refresh

period should be changeable

 

Signed-off-by: Siyuan Huang <saber.huang at samsung.com
<mailto:saber.huang at samsung.com> >

---

doc/muxers.texi       | 4 ++++

libavformat/dashenc.c | 4 ++++

2 files changed, 8 insertions(+)

mode change 100644 => 100755 doc/muxers.texi

 

diff --git a/doc/muxers.texi b/doc/muxers.texi

old mode 100644

new mode 100755

index b1389a3227..babbcb16af

--- a/doc/muxers.texi

+++ b/doc/muxers.texi

@@ -366,6 +366,10 @@ adjusting playback latency and buffer occupancy during
normal playback by client

Set the maximum playback rate indicated as appropriate for the purposes of
automatically

adjusting playback latency and buffer occupancy during normal playback by
clients.

 

+ at item update_period @var{update_period}

+ Set the mpd update period ,for dynamic content.

+ The unit is second.

+

@end table

 

 @anchor{framecrc}

diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c

index 66a8a62294..ef6e3d29c6 100755

--- a/libavformat/dashenc.c

+++ b/libavformat/dashenc.c

@@ -198,6 +198,7 @@ typedef struct DASHContext {

     int target_latency_refid;

     AVRational min_playback_rate;

     AVRational max_playback_rate;

+    int64_t update_period;

} DASHContext;

 

 static struct codec_string {

@@ -1184,6 +1185,8 @@ static int write_manifest(AVFormatContext *s, int
final)

         char now_str[100];

         if (c->use_template && !c->use_timeline)

             update_period = 500;

+        if (c->update_period)

+            update_period = c->update_period;

         avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n",
update_period);

         if (!c->ldash)

             avio_printf(out,
"\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration /
AV_TIME_BASE);

@@ -2382,6 +2385,7 @@ static const AVOption options[] = {

     { "target_latency", "Set desired target latency for Low-latency dash",
OFFSET(target_latency), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },

     { "min_playback_rate", "Set desired minimum playback rate",
OFFSET(min_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E
},

     { "max_playback_rate", "Set desired maximum playback rate",
OFFSET(max_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E
},

+    { "update_period", "Set the mpd update interval",
OFFSET(update_period), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},

     { NULL },

};

 

-- 

2.17.1

 

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