+#define OFFSET(x) offsetof(HTTPContext, x)
+static const AVOption options[] = {
+{"chunksize", "use chunked transfer-encoding for posts, -1 disables it, 0 enables it", OFFSET(chunksize), FF_OPT_TYPE_INT64, 0, -1, 0 }, /* Default to 0, for chunked POSTs */
+{NULL}
+};
+static const AVClass httpcontext_class = {
+ "HTTP", av_default_item_name, options, LIBAVUTIL_VERSION_INT
+};
+