diff --git a/libavformat/rtspenc.c b/libavformat/rtspenc.c
index 293baa2a38..c0436c35e0 100644
--- a/libavformat/rtspenc.c
+++ b/libavformat/rtspenc.c
@@ -168,8 +168,8 @@ AVOutputFormat rtsp_muxer = {
     NULL,
     NULL,
     sizeof(RTSPState),
-    CODEC_ID_PCM_MULAW,
-    CODEC_ID_NONE,
+    CODEC_ID_AAC,
+    CODEC_ID_MPEG4,
     rtsp_write_header,
     rtsp_write_packet,
     rtsp_write_close,