On Fri, 27 Jan 2017, Peter Große wrote:

Signed-off-by: Peter Große <[email protected]>
---
libavformat/dashenc.c | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
index c561ad1..a0c7811 100644
--- a/libavformat/dashenc.c
+++ b/libavformat/dashenc.c
@@ -460,10 +460,19 @@ static int write_adaptation_set(AVFormatContext *s, 
AVIOContext *out, int as_ind
{
    DASHContext *c = s->priv_data;
    AdaptationSet *as = &c->as[as_index];
+    AVDictionaryEntry *lang, *role;
    int i;

-    avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" 
bitstreamSwitching=\"true\">\n",
+    avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" 
segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
                as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : 
"audio");
+    lang = av_dict_get(as->metadata, "language", NULL, 0);
+    if (lang)
+        avio_printf(out, " lang=\"%s\"", lang->value);
+    avio_printf(out, ">\n");
+
+    role = av_dict_get(as->metadata, "role", NULL, 0);
+    if (role)
+        avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" 
value=\"%s\"/>\n", role->value);

    for (i = 0; i < s->nb_streams; i++) {
        OutputStream *os = &c->streams[i];
@@ -669,6 +678,14 @@ static int write_manifest(AVFormatContext *s, int final)
    return ff_rename(temp_filename, s->filename);
}

+static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const 
char *key)
+{
+    AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
+    if (entry)
+        av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
+    return 0;
+}
+
static int dash_write_header(AVFormatContext *s)
{
    DASHContext *c = s->priv_data;
@@ -713,6 +730,7 @@ static int dash_write_header(AVFormatContext *s)

    for (i = 0; i < s->nb_streams; i++) {
        OutputStream *os = &c->streams[i];
+        AdaptationSet *as = &c->as[os->as_idx - 1];
        AVFormatContext *ctx;
        AVStream *st;
        AVDictionary *opts = NULL;
@@ -743,6 +761,10 @@ static int dash_write_header(AVFormatContext *s)
            }
        }

+        // copy AdaptationSet language and role from stream metadata
+        dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
+        dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
+
        ctx = avformat_alloc_context();
        if (!ctx) {
            ret = AVERROR(ENOMEM);
--
2.10.2

This seems ok, even though it (mis)uses metadata for this kind of info. Or what does Anton think of this one?

// Martin
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