Allow autodetection of E-AC3.

Originally committed as revision 20206 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/utils.c

@@ -329,6 +329,9 @@ static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeDa
         } else if (!strcmp(fmt->name, "ac3")) {
             st->codec->codec_id = CODEC_ID_AC3;
             st->codec->codec_type = CODEC_TYPE_AUDIO;
+        } else if (!strcmp(fmt->name, "eac3")) {
+            st->codec->codec_id = CODEC_ID_EAC3;
+            st->codec->codec_type = CODEC_TYPE_AUDIO;
         } else if (!strcmp(fmt->name, "mpegvideo")) {
             st->codec->codec_id = CODEC_ID_MPEG2VIDEO;
             st->codec->codec_type = CODEC_TYPE_VIDEO;