From e3518821c95d3a90498e93e53dcc886b9d082ccf Mon Sep 17 00:00:00 2001
From: Vishwanath Dixit <vdixit@akamai.com>
Date: Mon, 7 May 2018 15:28:02 +0530
Subject: [PATCH] avformat/dashenc: configuring container format options

---
 doc/muxers.texi       | 4 ++++
 libavformat/dashenc.c | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/doc/muxers.texi b/doc/muxers.texi
index 57948cfb9a..59e20bf426 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -284,6 +284,10 @@ corrects that index value.
 Typically this logic is needed in live streaming use cases. The network bandwidth
 fluctuations are common during long run streaming. Each fluctuation can cause
 the segment indexes fall behind the expected real time position.
+@item -format_options @var{options_list}
+Set container format (mp4/webm) options using a @code{:} separated list of
+key=value parameters. Values containing @code{:} special characters must be
+escaped.
 @end table
 
 @anchor{framecrc}
diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
index 1dd633365d..e27b61c096 100644
--- a/libavformat/dashenc.c
+++ b/libavformat/dashenc.c
@@ -125,6 +125,7 @@ typedef struct DASHContext {
     int streaming;
     int64_t timeout;
     int index_correction;
+    char *format_options_str;
 } DASHContext;
 
 static struct codec_string {
@@ -1017,6 +1018,11 @@ static int dash_init(AVFormatContext *s)
         av_dict_free(&opts);
         os->init_start_pos = 0;
 
+        if (c->format_options_str) {
+            ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
+            if (ret < 0)
+                return ret;
+        }
         if (!strcmp(os->format_name, "mp4")) {
             if (c->streaming)
                 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov", 0);
@@ -1538,6 +1544,7 @@ static const AVOption options[] = {
     { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
     { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
     { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
+    { "format_options","set list of options for the container format (mp4/webm) used for dash", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL},  0, 0, E},
     { NULL },
 };