libavformat/dashenc: Option to set timeout for socket I/O operation

doc/muxers.texi

@@ -264,6 +264,8 @@ of the adaptation sets and a,b,c,d and e are the indices of the mapped streams.
 To map all video (or audio) streams to an AdaptationSet, "v" (or "a") can be used as stream identifier instead of IDs.
 
 When no assignment is defined, this defaults to an AdaptationSet for each stream.
+@item -timeout @var{timeout}
+Set timeout for socket I/O operations. Applicable only for HTTP output.
 @end table
 
 @anchor{framecrc}

libavformat/dashenc.c

@@ -117,6 +117,7 @@ typedef struct DASHContext {
     AVIOContext *mpd_out;
     AVIOContext *m3u8_out;
     int streaming;
+    int64_t timeout;
 } DASHContext;
 
 static struct codec_string {
@@ -269,6 +270,8 @@ static void set_http_options(AVDictionary **options, DASHContext *c)
         av_dict_set(options, "user_agent", c->user_agent, 0);
     if (c->http_persistent)
         av_dict_set_int(options, "multiple_requests", 1, 0);
+    if (c->timeout >= 0)
+        av_dict_set_int(options, "timeout", c->timeout, 0);
 }
 
 static void get_hls_playlist_name(char *playlist_name, int string_size,
@@ -1440,6 +1443,7 @@ static const AVOption options[] = {
     { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
     { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
     { "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 },
     { NULL },
 };