lavf/mov: add AVCodecTag entry for GoPro metadata

This allows for validation of the track type
Signed-off-by: James Almer <jamrial@gmail.com>

libavformat/isom.c

@@ -374,6 +374,11 @@ const AVCodecTag ff_codec_movsubtitle_tags[] = {
     { AV_CODEC_ID_NONE, 0 },
 };
 
+const AVCodecTag ff_codec_movdata_tags[] = {
+    { AV_CODEC_ID_BIN_DATA, MKTAG('g', 'p', 'm', 'd') },
+    { AV_CODEC_ID_NONE, 0 },
+};
+
 /* map numeric codes from mdhd atom to ISO 639 */
 /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
 /* http://developer.apple.com/documentation/mac/Text/Text-368.html */

libavformat/isom.h

@@ -41,6 +41,7 @@ extern const AVCodecTag ff_mp4_obj_type[];
 extern const AVCodecTag ff_codec_movvideo_tags[];
 extern const AVCodecTag ff_codec_movaudio_tags[];
 extern const AVCodecTag ff_codec_movsubtitle_tags[];
+extern const AVCodecTag ff_codec_movdata_tags[];
 
 int ff_mov_iso639_to_lang(const char lang[4], int mp4);
 int ff_mov_lang_to_iso639(unsigned code, char to[4]);

libavformat/mov.c

@@ -2034,6 +2034,8 @@ static int mov_codec_id(AVStream *st, uint32_t format)
             id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
             if (id > 0)
                 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
+            else
+                id = ff_codec_get_id(ff_codec_movdata_tags, format);
         }
     }
 
@@ -2507,6 +2509,7 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
             mov_parse_stsd_subtitle(c, pb, st, sc,
                                     size - (avio_tell(pb) - start_pos));
         } else {
+            st->codecpar->codec_id = id;
             ret = mov_parse_stsd_data(c, pb, st, sc,
                                       size - (avio_tell(pb) - start_pos));
             if (ret < 0)