Added GXF format code to identify AVC Intra video streams. This was an...

Added GXF format code to identify AVC Intra video streams. This was an extension to the origional GXF spec implemented by Grass Valley.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/gxf.c

@@ -163,6 +163,11 @@ static int get_sindex(AVFormatContext *s, int id, int format) {
             st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
             st->codec->sample_rate = 48000;
             break;
+        case 26: /* AVCi50 / AVCi100 (AVC Intra) */
+            st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+            st->codec->codec_id = CODEC_ID_H264;
+            st->need_parsing = AVSTREAM_PARSE_HEADERS;
+            break;
         // timecode tracks:
         case 7:
         case 8: