diff --git a/doc/protocols.texi b/doc/protocols.texi
index d2935fc666..5e8c97d164 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -1653,7 +1653,7 @@ The list of supported options follows.
 @item buffer_size=@var{size}
 Set the UDP maximum socket buffer size in bytes. This is used to set either
 the receive or send buffer size, depending on what the socket is used for.
-Default is 64KB.  See also @var{fifo_size}.
+Default is 32 KB for output, 384 KB for input.  See also @var{fifo_size}.
 
 @item bitrate=@var{bitrate}
 If set to nonzero, the output will have the specified constant bitrate if the
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 7e59d51cc6..dce4cf76c7 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -71,6 +71,7 @@
 #endif
 
 #define UDP_TX_BUF_SIZE 32768
+#define UDP_RX_BUF_SIZE 393216
 #define UDP_MAX_PKT_SIZE 65536
 #define UDP_HEADER_SIZE 8
 
@@ -636,7 +637,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
 
     is_output = !(flags & AVIO_FLAG_READ);
     if (s->buffer_size < 0)
-        s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
+        s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_RX_BUF_SIZE;
 
     if (s->sources) {
         if (ff_ip_parse_sources(h, s->sources, &s->filters) < 0)