diff --git a/doc/muxers.texi b/doc/muxers.texi
index 59e20bf426..80c65420ba 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -288,6 +288,15 @@ the segment indexes fall behind the expected real time position.
 Set container format (mp4/webm) options using a @code{:} separated list of
 key=value parameters. Values containing @code{:} special characters must be
 escaped.
+
+@item dash_segment_type @var{dash_segment_type}
+Possible values:
+@item mp4
+If this flag is set, the dash segment files will be in in ISOBMFF format. This is the default format.
+
+@item webm
+If this flag is set, the dash segment files will be in in WebM format.
+
 @end table
 
 @anchor{framecrc}
diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
index e27b61c096..56af916555 100644
--- a/libavformat/dashenc.c
+++ b/libavformat/dashenc.c
@@ -48,6 +48,12 @@
 #include "vpcc.h"
 #include "dash.h"
 
+typedef enum {
+    SEGMENT_TYPE_MP4 = 0,
+    SEGMENT_TYPE_WEBM,
+    SEGMENT_TYPE_NB
+} SegmentType;
+
 typedef struct Segment {
     char file[1024];
     int64_t start_pos;
@@ -69,7 +75,6 @@ typedef struct OutputStream {
     AVFormatContext *ctx;
     int ctx_inited, as_idx;
     AVIOContext *out;
-    char format_name[8];
     int packets_written;
     char initfile[1024];
     int64_t init_start_pos, pos;
@@ -126,6 +131,8 @@ typedef struct DASHContext {
     int64_t timeout;
     int index_correction;
     char *format_options_str;
+    SegmentType segment_type;
+    const char *format_name;
 } DASHContext;
 
 static struct codec_string {
@@ -139,6 +146,15 @@ static struct codec_string {
     { 0, NULL }
 };
 
+static struct format_string {
+    SegmentType segment_type;
+    const char *str;
+} formats[] = {
+    { SEGMENT_TYPE_MP4, "mp4" },
+    { SEGMENT_TYPE_WEBM, "webm" },
+    { 0, NULL }
+};
+
 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
                            AVDictionary **options) {
     DASHContext *c = s->priv_data;
@@ -172,6 +188,14 @@ static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filenam
     }
 }
 
+static const char *get_format_str(SegmentType segment_type) {
+    int i;
+    for (i = 0; i < SEGMENT_TYPE_NB; i++)
+        if (formats[i].segment_type == segment_type)
+            return formats[i].str;
+    return NULL;
+}
+
 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
                               AVRational *frame_rate, char *str, int size) {
     VPCC vpcc;
@@ -582,13 +606,13 @@ static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_ind
         if (as->media_type == AVMEDIA_TYPE_VIDEO) {
             AVStream *st = s->streams[i];
             avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
-                i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
+                i, c->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
             if (st->avg_frame_rate.num)
                 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
             avio_printf(out, ">\n");
         } else {
             avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
-                i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
+                i, c->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
             avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
                 s->streams[i]->codecpar->channels);
         }
@@ -960,27 +984,10 @@ static int dash_init(AVFormatContext *s)
         if (!ctx)
             return AVERROR(ENOMEM);
 
-        // choose muxer based on codec: webm for VP8 and opus, mp4 otherwise
-        // note: os->format_name is also used as part of the mimetype of the
-        //       representation, e.g. video/<format_name>
-        if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP8 ||
-            s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
-            s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VORBIS) {
-            snprintf(os->format_name, sizeof(os->format_name), "webm");
-
-            if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
-                av_log(s, AV_LOG_ERROR,
-                       "WebM support in dashenc is experimental and has not "
-                       "been validated. For testing purposes, make sure "
-                       "to add -strict experimental and override "
-                       "-init_seg_name and -media_seg_name to end with "
-                       "the extension 'webm'.\n");
-                return AVERROR(EINVAL);
-            }
-        } else {
-            snprintf(os->format_name, sizeof(os->format_name), "mp4");
-        }
-        ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
+        c->format_name = get_format_str(c->segment_type);
+        if (!c->format_name)
+            return AVERROR_MUXER_NOT_FOUND;
+        ctx->oformat = av_guess_format(c->format_name, NULL, NULL);
         if (!ctx->oformat)
             return AVERROR_MUXER_NOT_FOUND;
         os->ctx = ctx;
@@ -1023,7 +1030,8 @@ static int dash_init(AVFormatContext *s)
             if (ret < 0)
                 return ret;
         }
-        if (!strcmp(os->format_name, "mp4")) {
+
+        if (c->segment_type == SEGMENT_TYPE_MP4) {
             if (c->streaming)
                 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov", 0);
             else
@@ -1088,7 +1096,7 @@ static int dash_write_header(AVFormatContext *s)
         // Flush init segment
         // Only for WebM segment, since for mp4 delay_moov is set and
         // the init segment is thus flushed after the first packets.
-        if (strcmp(os->format_name, "mp4") &&
+        if (c->segment_type == SEGMENT_TYPE_WEBM &&
             (ret = flush_init_segment(s, os)) < 0)
             return ret;
     }
@@ -1259,7 +1267,7 @@ static int dash_flush(AVFormatContext *s, int final, int stream)
         }
 
         if (!c->single_file) {
-            if (!strcmp(os->format_name, "mp4") && !os->written_len)
+            if (c->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
                 write_styp(os->ctx->pb);
         } else {
             snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
@@ -1449,7 +1457,7 @@ static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
     }
 
     //write out the data immediately in streaming mode
-    if (c->streaming && !strcmp(os->format_name, "mp4")) {
+    if (c->streaming && c->segment_type == SEGMENT_TYPE_MP4) {
         int len = 0;
         uint8_t *buf = NULL;
         if (!os->written_len)
@@ -1545,6 +1553,9 @@ static const AVOption options[] = {
     { "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},
+    { "dash_segment_type", "set dash segment files type", OFFSET(segment_type), AV_OPT_TYPE_INT, {.i64 = SEGMENT_TYPE_MP4 }, 0, SEGMENT_TYPE_NB - 1, E, "segment_type"},
+    { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX,   E, "segment_type"},
+    { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX,   E, "segment_type"},
     { NULL },
 };