diff --git a/ffserver.c b/ffserver.c
index c4a9ddf10f..0ee61e2e50 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -872,7 +872,7 @@ static void close_connection(HTTPContext *c)
             if (avio_open_dyn_buf(&ctx->pb) >= 0) {
                 av_write_trailer(ctx);
                 av_freep(&c->pb_buffer);
-                url_close_dyn_buf(ctx->pb, &c->pb_buffer);
+                avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
             }
         }
     }
@@ -2101,7 +2101,7 @@ static void compute_status(HTTPContext *c)
     avio_printf(pb, "<hr size=1 noshade>Generated at %s", p);
     avio_printf(pb, "</body>\n</html>\n");
 
-    len = url_close_dyn_buf(pb, &c->pb_buffer);
+    len = avio_close_dyn_buf(pb, &c->pb_buffer);
     c->buffer_ptr = c->pb_buffer;
     c->buffer_end = c->pb_buffer + len;
 }
@@ -2277,7 +2277,7 @@ static int http_prepare_data(HTTPContext *c)
         }
         av_metadata_free(&c->fmt_ctx.metadata);
 
-        len = url_close_dyn_buf(c->fmt_ctx.pb, &c->pb_buffer);
+        len = avio_close_dyn_buf(c->fmt_ctx.pb, &c->pb_buffer);
         c->buffer_ptr = c->pb_buffer;
         c->buffer_end = c->pb_buffer + len;
 
@@ -2410,7 +2410,7 @@ static int http_prepare_data(HTTPContext *c)
                         c->state = HTTPSTATE_SEND_DATA_TRAILER;
                     }
 
-                    len = url_close_dyn_buf(ctx->pb, &c->pb_buffer);
+                    len = avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
                     c->cur_frame_bytes = len;
                     c->buffer_ptr = c->pb_buffer;
                     c->buffer_end = c->pb_buffer + len;
@@ -2438,7 +2438,7 @@ static int http_prepare_data(HTTPContext *c)
         }
         c->fmt_ctx.pb->seekable = 0;
         av_write_trailer(ctx);
-        len = url_close_dyn_buf(ctx->pb, &c->pb_buffer);
+        len = avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
         c->buffer_ptr = c->pb_buffer;
         c->buffer_end = c->pb_buffer + len;
 
@@ -2518,7 +2518,7 @@ static int http_send_data(HTTPContext *c)
                     /* write RTP packet data */
                     c->buffer_ptr += 4;
                     avio_write(pb, c->buffer_ptr, len);
-                    size = url_close_dyn_buf(pb, &c->packet_buffer);
+                    size = avio_close_dyn_buf(pb, &c->packet_buffer);
                     /* prepare asynchronous TCP sending */
                     rtsp_c->packet_buffer_ptr = c->packet_buffer;
                     rtsp_c->packet_buffer_end = c->packet_buffer + size;
@@ -2907,7 +2907,7 @@ static int rtsp_parse_request(HTTPContext *c)
         rtsp_reply_error(c, RTSP_STATUS_METHOD);
 
  the_end:
-    len = url_close_dyn_buf(c->pb, &c->pb_buffer);
+    len = avio_close_dyn_buf(c->pb, &c->pb_buffer);
     c->pb = NULL; /* safety */
     if (len < 0) {
         /* XXX: cannot do more */
@@ -3456,7 +3456,7 @@ static int rtp_new_av_stream(HTTPContext *c,
         av_free(ctx);
         return -1;
     }
-    url_close_dyn_buf(ctx->pb, &dummy_buf);
+    avio_close_dyn_buf(ctx->pb, &dummy_buf);
     av_free(dummy_buf);
 
     c->rtp_ctx[stream_index] = ctx;
diff --git a/libavformat/asfenc.c b/libavformat/asfenc.c
index 40ccc19a32..f9cc609eef 100644
--- a/libavformat/asfenc.c
+++ b/libavformat/asfenc.c
@@ -238,7 +238,7 @@ static void put_str16(AVIOContext *s, const char *tag)
         return;
 
     avio_put_str16le(dyn_buf, tag);
-    len = url_close_dyn_buf(dyn_buf, &pb);
+    len = avio_close_dyn_buf(dyn_buf, &pb);
     avio_wl16(s, len);
     avio_write(s, pb, len);
     av_freep(&pb);
@@ -375,7 +375,7 @@ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data
             len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
             avio_wl16(pb, len);
         }
-        len = url_close_dyn_buf(dyn_buf, &buf);
+        len = avio_close_dyn_buf(dyn_buf, &buf);
         avio_write(pb, buf, len);
         av_freep(&buf);
         end_header(pb, hpos);
@@ -501,7 +501,7 @@ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data
             return AVERROR(ENOMEM);
 
         avio_put_str16le(dyn_buf, desc);
-        len = url_close_dyn_buf(dyn_buf, &buf);
+        len = avio_close_dyn_buf(dyn_buf, &buf);
         avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
 
         avio_write(pb, buf, len);
diff --git a/libavformat/avc.c b/libavformat/avc.c
index 274b490cf5..70a05ec5bc 100644
--- a/libavformat/avc.c
+++ b/libavformat/avc.c
@@ -96,7 +96,7 @@ int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size)
     ff_avc_parse_nal_units(pb, buf_in, *size);
 
     av_freep(buf);
-    *size = url_close_dyn_buf(pb, buf);
+    *size = avio_close_dyn_buf(pb, buf);
     return 0;
 }
 
diff --git a/libavformat/avio.h b/libavformat/avio.h
index 9e21057b85..5bc85827d1 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -448,6 +448,7 @@ attribute_deprecated int url_fprintf(AVIOContext *s, const char *fmt, ...);
 #endif
 attribute_deprecated void put_flush_packet(AVIOContext *s);
 attribute_deprecated int url_open_dyn_buf(AVIOContext **s);
+attribute_deprecated int url_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
 /**
  * @}
  */
@@ -704,7 +705,7 @@ int url_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);
  * @param pbuffer pointer to a byte buffer
  * @return the length of the byte buffer
  */
-int url_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
+int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
 
 #if FF_API_UDP_GET_FILE
 int udp_get_file_handle(URLContext *h);
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 53fce9e724..cb5f2790f7 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -423,6 +423,10 @@ int url_open_dyn_buf(AVIOContext **s)
 {
     return avio_open_dyn_buf(s);
 }
+int url_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
+{
+    return avio_close_dyn_buf(s, pbuffer);
+}
 #endif
 
 int avio_put_str(AVIOContext *s, const char *str)
@@ -1027,7 +1031,7 @@ int64_t ffio_read_seek(AVIOContext *s, int stream_index,
     return ret;
 }
 
-/* avio_open_dyn_buf and url_close_dyn_buf are used in rtp.c to send a response
+/* avio_open_dyn_buf and avio_close_dyn_buf are used in rtp.c to send a response
  * back to the server even if CONFIG_MUXERS is false. */
 #if CONFIG_MUXERS || CONFIG_NETWORK
 /* buffer handling */
@@ -1163,7 +1167,7 @@ int url_open_dyn_packet_buf(AVIOContext **s, int max_packet_size)
     return url_open_dyn_buf_internal(s, max_packet_size);
 }
 
-int url_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
+int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
 {
     DynBuffer *d = s->opaque;
     int size;
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index f32ab92171..e28ac42a75 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -498,7 +498,7 @@ static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecCo
         ff_put_wav_header(dyn_cp, codec);
     }
 
-    codecpriv_size = url_close_dyn_buf(dyn_cp, &codecpriv);
+    codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
     if (codecpriv_size)
         put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
     av_free(codecpriv);
@@ -1003,7 +1003,7 @@ static void mkv_flush_dynbuf(AVFormatContext *s)
     if (!mkv->dyn_bc)
         return;
 
-    bufsize = url_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
+    bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
     avio_write(s->pb, dyn_buf, bufsize);
     av_free(dyn_buf);
     mkv->dyn_bc = NULL;
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 6b7da183d8..0458844fc3 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -1691,7 +1691,7 @@ static int mov_write_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
         if (s->nb_chapters)
             mov_write_chpl_tag(pb_buf, s);
 
-    if ((size = url_close_dyn_buf(pb_buf, &buf)) > 0) {
+    if ((size = avio_close_dyn_buf(pb_buf, &buf)) > 0) {
         avio_wb32(pb, size+8);
         ffio_wfourcc(pb, "udta");
         avio_write(pb, buf, size);
diff --git a/libavformat/movenchint.c b/libavformat/movenchint.c
index 567197ee45..eb93ef8d7e 100644
--- a/libavformat/movenchint.c
+++ b/libavformat/movenchint.c
@@ -408,7 +408,7 @@ int ff_mov_add_hinted_packet(AVFormatContext *s, AVPacket *pkt,
 
     /* Fetch the output from the RTP muxer, open a new output buffer
      * for next time. */
-    size = url_close_dyn_buf(rtp_ctx->pb, &buf);
+    size = avio_close_dyn_buf(rtp_ctx->pb, &buf);
     if ((ret = url_open_dyn_packet_buf(&rtp_ctx->pb,
                                        RTP_MAX_PACKET_SIZE)) < 0)
         goto done;
@@ -424,7 +424,7 @@ int ff_mov_add_hinted_packet(AVFormatContext *s, AVPacket *pkt,
     av_freep(&buf);
 
     /* Write the hint data into the hint track */
-    hint_pkt.size = size = url_close_dyn_buf(hintbuf, &buf);
+    hint_pkt.size = size = avio_close_dyn_buf(hintbuf, &buf);
     hint_pkt.data = buf;
     hint_pkt.pts  = hint_pkt.dts;
     hint_pkt.stream_index = track_index;
@@ -448,7 +448,7 @@ void ff_mov_close_hinting(MOVTrack *track) {
         return;
     if (rtp_ctx->pb) {
         av_write_trailer(rtp_ctx);
-        url_close_dyn_buf(rtp_ctx->pb, &ptr);
+        avio_close_dyn_buf(rtp_ctx->pb, &ptr);
         av_free(ptr);
     }
     avformat_free_context(rtp_ctx);
diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c
index 2cbd5e224a..d46e67b70c 100644
--- a/libavformat/mp3enc.c
+++ b/libavformat/mp3enc.c
@@ -115,7 +115,7 @@ static int id3v2_put_ttag(AVFormatContext *s, const char *str1, const char *str2
     put(dyn_buf, str1);
     if (str2)
         put(dyn_buf, str2);
-    len = url_close_dyn_buf(dyn_buf, &pb);
+    len = avio_close_dyn_buf(dyn_buf, &pb);
 
     avio_wb32(s->pb, tag);
     id3v2_put_size(s, len);
diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index 5463749a50..c17a15dbf3 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -281,7 +281,7 @@ static inline void put_s_trace(AVIOContext *bc, int64_t v, char *file, char *fun
 //FIXME remove calculate_checksum
 static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc, int calculate_checksum, uint64_t startcode){
     uint8_t *dyn_buf=NULL;
-    int dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf);
+    int dyn_size= avio_close_dyn_buf(dyn_bc, &dyn_buf);
     int forw_ptr= dyn_size + 4*calculate_checksum;
 
     if(forw_ptr > 4096)
@@ -450,7 +450,7 @@ static int write_globalinfo(NUTContext *nut, AVIOContext *bc){
 
     ff_put_v(bc, count);
 
-    dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf);
+    dyn_size= avio_close_dyn_buf(dyn_bc, &dyn_buf);
     avio_write(bc, dyn_buf, dyn_size);
     av_free(dyn_buf);
     return 0;
@@ -470,7 +470,7 @@ static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id){
         if (st->disposition & ff_nut_dispositions[i].flag)
             count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str);
     }
-    dyn_size = url_close_dyn_buf(dyn_bc, &dyn_buf);
+    dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
 
     if (count) {
         ff_put_v(bc, stream_id + 1); //stream_id_plus1
@@ -509,7 +509,7 @@ static int write_chapter(NUTContext *nut, AVIOContext *bc, int id)
 
     ff_put_v(bc, count);
 
-    dyn_size = url_close_dyn_buf(dyn_bc, &dyn_buf);
+    dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
     avio_write(bc, dyn_buf, dyn_size);
     av_freep(&dyn_buf);
     return 0;
@@ -554,7 +554,7 @@ static int write_headers(AVFormatContext *avctx, AVIOContext *bc){
             put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
         else {
             uint8_t* buf;
-            url_close_dyn_buf(dyn_bc, &buf);
+            avio_close_dyn_buf(dyn_bc, &buf);
             av_free(buf);
         }
     }
@@ -566,7 +566,7 @@ static int write_headers(AVFormatContext *avctx, AVIOContext *bc){
         ret = write_chapter(nut, dyn_bc, i);
         if (ret < 0) {
             uint8_t *buf;
-            url_close_dyn_buf(dyn_bc, &buf);
+            avio_close_dyn_buf(dyn_bc, &buf);
             av_freep(&buf);
             return ret;
         }
diff --git a/libavformat/oggenc.c b/libavformat/oggenc.c
index 8a0fffb138..92c751c07a 100644
--- a/libavformat/oggenc.c
+++ b/libavformat/oggenc.c
@@ -101,7 +101,7 @@ static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
     ogg_update_checksum(s, pb, crc_offset);
     avio_flush(pb);
 
-    size = url_close_dyn_buf(pb, &buf);
+    size = avio_close_dyn_buf(pb, &buf);
     if (size < 0)
         return size;
 
diff --git a/libavformat/rtpdec.c b/libavformat/rtpdec.c
index 3d03b815c2..bbd5f338ed 100644
--- a/libavformat/rtpdec.c
+++ b/libavformat/rtpdec.c
@@ -321,7 +321,7 @@ int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count)
     }
 
     avio_flush(pb);
-    len = url_close_dyn_buf(pb, &buf);
+    len = avio_close_dyn_buf(pb, &buf);
     if ((len > 0) && buf) {
         int result;
         av_dlog(s->ic, "sending %d bytes of RR\n", len);
@@ -349,7 +349,7 @@ void rtp_send_punch_packets(URLContext* rtp_handle)
     avio_wb32(pb, 0); /* SSRC */
 
     avio_flush(pb);
-    len = url_close_dyn_buf(pb, &buf);
+    len = avio_close_dyn_buf(pb, &buf);
     if ((len > 0) && buf)
         url_write(rtp_handle, buf, len);
     av_free(buf);
@@ -364,7 +364,7 @@ void rtp_send_punch_packets(URLContext* rtp_handle)
     avio_wb32(pb, 0); /* our own SSRC */
 
     avio_flush(pb);
-    len = url_close_dyn_buf(pb, &buf);
+    len = avio_close_dyn_buf(pb, &buf);
     if ((len > 0) && buf)
         url_write(rtp_handle, buf, len);
     av_free(buf);
diff --git a/libavformat/rtpdec_asf.c b/libavformat/rtpdec_asf.c
index ae9d53c2a3..a8326cf123 100644
--- a/libavformat/rtpdec_asf.c
+++ b/libavformat/rtpdec_asf.c
@@ -203,7 +203,7 @@ static int asfrtp_parse_packet(AVFormatContext *s, PayloadContext *asf,
                  */
                 if (asf->pktbuf && len_off != avio_tell(asf->pktbuf)) {
                     uint8_t *p;
-                    url_close_dyn_buf(asf->pktbuf, &p);
+                    avio_close_dyn_buf(asf->pktbuf, &p);
                     asf->pktbuf = NULL;
                     av_free(p);
                 }
@@ -217,7 +217,7 @@ static int asfrtp_parse_packet(AVFormatContext *s, PayloadContext *asf,
                 avio_skip(pb, len - off);
                 if (!(flags & RTP_FLAG_MARKER))
                     return -1;
-                out_len     = url_close_dyn_buf(asf->pktbuf, &asf->buf);
+                out_len     = avio_close_dyn_buf(asf->pktbuf, &asf->buf);
                 asf->pktbuf = NULL;
             } else {
                 /**
@@ -272,7 +272,7 @@ static void asfrtp_free_context(PayloadContext *asf)
 {
     if (asf->pktbuf) {
         uint8_t *p = NULL;
-        url_close_dyn_buf(asf->pktbuf, &p);
+        avio_close_dyn_buf(asf->pktbuf, &p);
         asf->pktbuf = NULL;
         av_free(p);
     }
diff --git a/libavformat/rtpdec_latm.c b/libavformat/rtpdec_latm.c
index e3f1604a54..5bf4c1964e 100644
--- a/libavformat/rtpdec_latm.c
+++ b/libavformat/rtpdec_latm.c
@@ -43,7 +43,7 @@ static void latm_free_context(PayloadContext *data)
         return;
     if (data->dyn_buf) {
         uint8_t *p;
-        url_close_dyn_buf(data->dyn_buf, &p);
+        avio_close_dyn_buf(data->dyn_buf, &p);
         av_free(p);
     }
     av_free(data->buf);
@@ -60,7 +60,7 @@ static int latm_parse_packet(AVFormatContext *ctx, PayloadContext *data,
         if (!data->dyn_buf || data->timestamp != *timestamp) {
             av_freep(&data->buf);
             if (data->dyn_buf)
-                url_close_dyn_buf(data->dyn_buf, &data->buf);
+                avio_close_dyn_buf(data->dyn_buf, &data->buf);
             data->dyn_buf = NULL;
             av_freep(&data->buf);
 
@@ -73,7 +73,7 @@ static int latm_parse_packet(AVFormatContext *ctx, PayloadContext *data,
         if (!(flags & RTP_FLAG_MARKER))
             return AVERROR(EAGAIN);
         av_free(data->buf);
-        data->len = url_close_dyn_buf(data->dyn_buf, &data->buf);
+        data->len = avio_close_dyn_buf(data->dyn_buf, &data->buf);
         data->dyn_buf = NULL;
         data->pos = 0;
     }
diff --git a/libavformat/rtpdec_svq3.c b/libavformat/rtpdec_svq3.c
index e93e31c0e2..8c0926212c 100644
--- a/libavformat/rtpdec_svq3.c
+++ b/libavformat/rtpdec_svq3.c
@@ -83,7 +83,7 @@ static int svq3_parse_packet (AVFormatContext *s, PayloadContext *sv,
 
         if (sv->pktbuf) {
             uint8_t *tmp;
-            url_close_dyn_buf(sv->pktbuf, &tmp);
+            avio_close_dyn_buf(sv->pktbuf, &tmp);
             av_free(tmp);
         }
         if ((res = avio_open_dyn_buf(&sv->pktbuf)) < 0)
@@ -100,7 +100,7 @@ static int svq3_parse_packet (AVFormatContext *s, PayloadContext *sv,
         av_init_packet(pkt);
         pkt->stream_index = st->index;
         *timestamp        = sv->timestamp;
-        pkt->size         = url_close_dyn_buf(sv->pktbuf, &pkt->data);
+        pkt->size         = avio_close_dyn_buf(sv->pktbuf, &pkt->data);
         pkt->destruct     = av_destruct_packet;
         sv->pktbuf        = NULL;
         return 0;
@@ -118,7 +118,7 @@ static void svq3_extradata_free(PayloadContext *sv)
 {
     if (sv->pktbuf) {
         uint8_t *buf;
-        url_close_dyn_buf(sv->pktbuf, &buf);
+        avio_close_dyn_buf(sv->pktbuf, &buf);
         av_free(buf);
     }
     av_free(sv);
diff --git a/libavformat/rtpdec_vp8.c b/libavformat/rtpdec_vp8.c
index f0ebb3173a..9e50cc44e1 100644
--- a/libavformat/rtpdec_vp8.c
+++ b/libavformat/rtpdec_vp8.c
@@ -41,7 +41,7 @@ static void prepare_packet(AVPacket *pkt, PayloadContext *vp8, int stream)
     av_init_packet(pkt);
     pkt->stream_index = stream;
     pkt->flags        = vp8->is_keyframe ? AV_PKT_FLAG_KEY : 0;
-    pkt->size         = url_close_dyn_buf(vp8->data, &pkt->data);
+    pkt->size         = avio_close_dyn_buf(vp8->data, &pkt->data);
     pkt->destruct     = av_destruct_packet;
     vp8->data         = NULL;
 }
@@ -138,7 +138,7 @@ static void vp8_free_context(PayloadContext *vp8)
 {
     if (vp8->data) {
         uint8_t *tmp;
-        url_close_dyn_buf(vp8->data, &tmp);
+        avio_close_dyn_buf(vp8->data, &tmp);
         av_free(tmp);
     }
     av_free(vp8);
diff --git a/libavformat/rtpdec_xiph.c b/libavformat/rtpdec_xiph.c
index 9eb1ec2352..4d8e834813 100644
--- a/libavformat/rtpdec_xiph.c
+++ b/libavformat/rtpdec_xiph.c
@@ -57,7 +57,7 @@ static inline void free_fragment_if_needed(PayloadContext * data)
 {
     if (data->fragment) {
         uint8_t* p;
-        url_close_dyn_buf(data->fragment, &p);
+        avio_close_dyn_buf(data->fragment, &p);
         av_free(p);
         data->fragment = NULL;
     }
@@ -203,7 +203,7 @@ static int xiph_handle_packet(AVFormatContext * ctx,
         if (fragmented == 3) {
             // end of xiph data packet
             av_init_packet(pkt);
-            pkt->size = url_close_dyn_buf(data->fragment, &pkt->data);
+            pkt->size = avio_close_dyn_buf(data->fragment, &pkt->data);
 
             if (pkt->size < 0) {
                 av_log(ctx, AV_LOG_ERROR,
diff --git a/libavformat/rtpenc_chain.c b/libavformat/rtpenc_chain.c
index a22804130f..77633ed53e 100644
--- a/libavformat/rtpenc_chain.c
+++ b/libavformat/rtpenc_chain.c
@@ -63,7 +63,7 @@ AVFormatContext *ff_rtp_chain_mux_open(AVFormatContext *s, AVStream *st,
             avio_close(rtpctx->pb);
         } else {
             uint8_t *ptr;
-            url_close_dyn_buf(rtpctx->pb, &ptr);
+            avio_close_dyn_buf(rtpctx->pb, &ptr);
             av_free(ptr);
         }
         avformat_free_context(rtpctx);
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 5b98a2846c..90073d63a2 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -495,7 +495,7 @@ void ff_rtsp_undo_setup(AVFormatContext *s)
                 av_write_trailer(rtpctx);
                 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
                     uint8_t *ptr;
-                    url_close_dyn_buf(rtpctx->pb, &ptr);
+                    avio_close_dyn_buf(rtpctx->pb, &ptr);
                     av_free(ptr);
                 } else {
                     avio_close(rtpctx->pb);
diff --git a/libavformat/rtspenc.c b/libavformat/rtspenc.c
index 1f1fd32fc1..e3631c4290 100644
--- a/libavformat/rtspenc.c
+++ b/libavformat/rtspenc.c
@@ -135,7 +135,7 @@ static int tcp_write_packet(AVFormatContext *s, RTSPStream *rtsp_st)
     int size;
     uint8_t *interleave_header, *interleaved_packet;
 
-    size = url_close_dyn_buf(rtpctx->pb, &buf);
+    size = avio_close_dyn_buf(rtpctx->pb, &buf);
     ptr = buf;
     while (size > 4) {
         uint32_t packet_len = AV_RB32(ptr);