Try again with ffmpeg build fix as the upstream fix looks bad

ffmpeg35_buildfix.patch

@@ -1,16 +1,15 @@
 --- a/applications/dashcast/video_encoder.c
 +++ b/applications/dashcast/video_encoder.c
-@@ -143,8 +143,10 @@ int dc_video_encoder_open(VideoOutputFile *video_output_file, VideoDataConf *vid
- 		av_opt_set_int(video_output_file->codec_ctx->priv_data, "key-int", video_output_file->gdr, 0);
+@@ -144,7 +144,7 @@
  	}
  
-+#ifdef CODEC_FLAG_GLOBAL_HEADER
  	//the global header gives access to the extradata (SPS/PPS)
- 	video_output_file->codec_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
-+#endif
+-	video_output_file->codec_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
++	video_output_file->codec_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
  
  	video_output_file->vstream_idx = 0;//video_stream->index;
  
+
 --- a/modules/ffmpeg_in/ffmpeg_decode.c
 +++ b/modules/ffmpeg_in/ffmpeg_decode.c
 @@ -49,7 +49,7 @@