diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 0be405a..c7ffa07 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -1025,7 +1025,7 @@ static void handle_rtp_info(RTSPState *rt, const char *url,
 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
 {
     int read = 0;
-    char key[20], value[1024], url[1024] = "";
+    char key[20], value[MAX_URL_SIZE], url[MAX_URL_SIZE] = "";
     uint32_t seq = 0, rtptime = 0;
 
     for (;;) {
@@ -1124,7 +1124,7 @@ void ff_rtsp_skip_packet(AVFormatContext *s)
 {
     RTSPState *rt = s->priv_data;
     int ret, len, len1;
-    uint8_t buf[1024];
+    uint8_t buf[MAX_URL_SIZE];
 
     ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
     if (ret != 3)
@@ -1150,7 +1150,7 @@ int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
                        int return_on_interleaved_data, const char *method)
 {
     RTSPState *rt = s->priv_data;
-    char buf[4096], buf1[1024], *q;
+    char buf[MAX_URL_SIZE], buf1[MAX_URL_SIZE], *q;
     unsigned char ch;
     const char *p;
     int ret, content_length, line_count = 0, request = 0;
@@ -1230,7 +1230,7 @@ start:
         av_freep(&content);
 
     if (request) {
-        char buf[1024];
+        char buf[MAX_URL_SIZE];
         char base64buf[AV_BASE64_SIZE(sizeof(buf))];
         const char* ptr = buf;
 
@@ -1306,7 +1306,7 @@ static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
                                             int send_content_length)
 {
     RTSPState *rt = s->priv_data;
-    char buf[4096], *out_buf;
+    char buf[MAX_URL_SIZE], *out_buf;
     char base64buf[AV_BASE64_SIZE(sizeof(buf))];
 
     if (!rt->rtsp_hd_out)
@@ -1416,7 +1416,7 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
     int rtx = 0, j, i, err, interleave = 0, port_off;
     RTSPStream *rtsp_st;
     RTSPMessageHeader reply1, *reply = &reply1;
-    char cmd[2048];
+    char cmd[MAX_URL_SIZE];
     const char *trans_pref;
 
     if (rt->transport == RTSP_TRANSPORT_RDT)
@@ -1437,7 +1437,7 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
     port_off -= port_off & 0x01;
 
     for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
-        char transport[2048];
+        char transport[MAX_URL_SIZE];
 
         /*
          * WMS serves all UDP data over a single connection, the RTX, which
@@ -1586,7 +1586,7 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
             break;
 
         case RTSP_LOWER_TRANSPORT_UDP: {
-            char url[1024], options[30] = "";
+            char url[MAX_URL_SIZE], options[30] = "";
             const char *peer = host;
 
             if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
@@ -1604,7 +1604,7 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
             break;
         }
         case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
-            char url[1024], namebuf[50], optbuf[20] = "";
+            char url[MAX_URL_SIZE], namebuf[50], optbuf[20] = "";
             struct sockaddr_storage addr;
             int port, ttl;
             AVDictionary *opts = map_to_opts(rt);
@@ -1666,7 +1666,7 @@ int ff_rtsp_connect(AVFormatContext *s)
 {
     RTSPState *rt = s->priv_data;
     char proto[128], host[1024], path[1024];
-    char tcpname[1024], cmd[2048], auth[128];
+    char tcpname[1024], cmd[MAX_URL_SIZE], auth[128];
     const char *lower_rtsp_proto = "tcp";
     int port, err, tcp_fd;
     RTSPMessageHeader reply1, *reply = &reply1;
@@ -2324,7 +2324,7 @@ static int sdp_read_header(AVFormatContext *s)
     RTSPStream *rtsp_st;
     int size, i, err;
     char *content;
-    char url[1024];
+    char url[MAX_URL_SIZE];
 
     if (!ff_network_init())
         return AVERROR(EIO);
diff --git a/libavformat/rtsp.h b/libavformat/rtsp.h
index 251ed86..b74cdc1 100644
--- a/libavformat/rtsp.h
+++ b/libavformat/rtsp.h
@@ -27,6 +27,7 @@
 #include "rtpdec.h"
 #include "network.h"
 #include "httpauth.h"
+#include "internal.h"
 
 #include "libavutil/log.h"
 #include "libavutil/opt.h"
@@ -316,7 +317,7 @@ typedef struct RTSPState {
     /** some MS RTSP streams contain a URL in the SDP that we need to use
      * for all subsequent RTSP requests, rather than the input URI; in
      * other cases, this is a copy of AVFormatContext->filename. */
-    char control_uri[2048];
+    char control_uri[MAX_URL_SIZE];
 
     /** The following are used for parsing raw mpegts in udp */
     //@{
@@ -444,7 +445,7 @@ typedef struct RTSPStream {
      * for the selected transport. Only used for TCP. */
     int interleaved_min, interleaved_max;
 
-    char control_url[1024];   /**< url for this stream (from SDP) */
+    char control_url[MAX_URL_SIZE];   /**< url for this stream (from SDP) */
 
     /** The following are used only in SDP, not RTSP */
     //@{
diff --git a/libavformat/rtspdec.c b/libavformat/rtspdec.c
index 28b35d1..6ea75b8 100644
--- a/libavformat/rtspdec.c
+++ b/libavformat/rtspdec.c
@@ -97,7 +97,7 @@ static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code,
                            const char *extracontent, uint16_t seq)
 {
     RTSPState *rt = s->priv_data;
-    char message[4096];
+    char message[MAX_URL_SIZE];
     int index = 0;
     while (status_messages[index].code) {
         if (status_messages[index].code == code) {
@@ -143,7 +143,7 @@ static inline int rtsp_read_request(AVFormatContext *s,
                                     const char *method)
 {
     RTSPState *rt = s->priv_data;
-    char rbuf[1024];
+    char rbuf[MAX_URL_SIZE];
     int rbuflen, ret;
     do {
         ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
@@ -232,9 +232,9 @@ static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl)
     RTSPState *rt             = s->priv_data;
     RTSPMessageHeader request = { 0 };
     int ret                   = 0;
-    char url[1024];
+    char url[MAX_URL_SIZE];
     RTSPStream *rtsp_st;
-    char responseheaders[1024];
+    char responseheaders[MAX_URL_SIZE];
     int localport    = -1;
     int transportidx = 0;
     int streamid     = 0;
@@ -340,7 +340,7 @@ static int rtsp_read_record(AVFormatContext *s)
     RTSPState *rt             = s->priv_data;
     RTSPMessageHeader request = { 0 };
     int ret                   = 0;
-    char responseheaders[1024];
+    char responseheaders[MAX_URL_SIZE];
 
     ret = rtsp_read_request(s, &request, "RECORD");
     if (ret)
@@ -463,7 +463,7 @@ static inline int parse_command_line(AVFormatContext *s, const char *line,
 int ff_rtsp_parse_streaming_commands(AVFormatContext *s)
 {
     RTSPState *rt = s->priv_data;
-    unsigned char rbuf[4096];
+    unsigned char rbuf[MAX_URL_SIZE];
     unsigned char method[10];
     char uri[500];
     int ret;
@@ -505,7 +505,7 @@ static int rtsp_read_play(AVFormatContext *s)
     RTSPState *rt = s->priv_data;
     RTSPMessageHeader reply1, *reply = &reply1;
     int i;
-    char cmd[1024];
+    char cmd[MAX_URL_SIZE];
 
     av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
     rt->nb_byes = 0;
@@ -591,7 +591,7 @@ static int rtsp_read_pause(AVFormatContext *s)
 int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
 {
     RTSPState *rt = s->priv_data;
-    char cmd[1024];
+    char cmd[MAX_URL_SIZE];
     unsigned char *content = NULL;
     int ret;
 
@@ -634,7 +634,7 @@ static int rtsp_listen(AVFormatContext *s)
     int default_port = RTSP_DEFAULT_PORT;
     char tcpname[500];
     const char *lower_proto = "tcp";
-    unsigned char rbuf[4096];
+    unsigned char rbuf[MAX_URL_SIZE];
     unsigned char method[10];
     int rbuflen = 0;
     int ret;
@@ -825,7 +825,7 @@ static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
     RTSPState *rt = s->priv_data;
     int ret;
     RTSPMessageHeader reply1, *reply = &reply1;
-    char cmd[1024];
+    char cmd[MAX_URL_SIZE];
 
 retry:
     if (rt->server_type == RTSP_SERVER_REAL) {
diff --git a/libavformat/rtspenc.c b/libavformat/rtspenc.c
index d505444..c320227 100644
--- a/libavformat/rtspenc.c
+++ b/libavformat/rtspenc.c
@@ -49,7 +49,7 @@ int ff_rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
     int i;
     char *sdp;
     AVFormatContext sdp_ctx, *ctx_array[1];
-    char url[1024];
+    char url[MAX_URL_SIZE];
 
     if (s->start_time_realtime == 0  ||  s->start_time_realtime == AV_NOPTS_VALUE)
         s->start_time_realtime = av_gettime();
@@ -111,7 +111,7 @@ static int rtsp_write_record(AVFormatContext *s)
 {
     RTSPState *rt = s->priv_data;
     RTSPMessageHeader reply1, *reply = &reply1;
-    char cmd[1024];
+    char cmd[MAX_URL_SIZE];
 
     snprintf(cmd, sizeof(cmd),
              "Range: npt=0.000-\r\n");
