diff --git a/INSTALL b/INSTALL
index 8cd22bd441..9549346302 100644
--- a/INSTALL
+++ b/INSTALL
@@ -9,3 +9,7 @@ path when launching 'configure', e.g. '/ffmpegdir/ffmpeg/configure'.
 2) Then type 'make' to build FFmpeg. GNU Make 3.81 or later is required.
 
 3) Type 'make install' to install all binaries and libraries you built.
+
+NOTICE
+
+ - Non system dependencies (e.g. libx264, libvpx) are disabled by default.
diff --git a/doc/protocols.texi b/doc/protocols.texi
index 3c57129ce0..a71c262368 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -402,6 +402,23 @@ ffplay sap://[ff0e::2:7ffe]
 
 Trasmission Control Protocol.
 
+The required syntax for a TCP url is:
+@example
+tcp://@var{hostname}:@var{port}[?@var{options}]
+@end example
+
+@table @option
+
+@item listen
+Listen for an incoming connection
+
+@example
+ffmpeg -i @var{input} -f @var{format} tcp://@var{hostname}:@var{port}?listen
+ffplay tcp://@var{hostname}:@var{port}
+@end example
+
+@end table
+
 @section udp
 
 User Datagram Protocol.
diff --git a/ffmpeg.c b/ffmpeg.c
index e147363011..40e5e67ee4 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2569,7 +2569,7 @@ static int transcode(AVFormatContext **output_files,
     if (!using_stdin) {
         if(verbose >= 0)
             fprintf(stderr, "Press [q] to stop encoding\n");
-        url_set_interrupt_cb(decode_interrupt_cb);
+        avio_set_interrupt_cb(decode_interrupt_cb);
     }
     term_init();
 
@@ -3887,7 +3887,7 @@ static void opt_output_file(const char *filename)
         }
 
         /* open the file */
-        if ((err = avio_open(&oc->pb, filename, URL_WRONLY)) < 0) {
+        if ((err = avio_open(&oc->pb, filename, AVIO_WRONLY)) < 0) {
             print_error(filename, err);
             ffmpeg_exit(1);
         }
@@ -4426,7 +4426,7 @@ int main(int argc, char **argv)
 
 #if HAVE_ISATTY
     if(isatty(STDIN_FILENO))
-        url_set_interrupt_cb(decode_interrupt_cb);
+        avio_set_interrupt_cb(decode_interrupt_cb);
 #endif
 
     init_opts();
diff --git a/ffplay.c b/ffplay.c
index e3e6e378dc..cd515fa565 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -2406,7 +2406,7 @@ static int decode_thread(void *arg)
     is->subtitle_stream = -1;
 
     global_video_state = is;
-    url_set_interrupt_cb(decode_interrupt_cb);
+    avio_set_interrupt_cb(decode_interrupt_cb);
 
     memset(ap, 0, sizeof(*ap));
 
@@ -2626,7 +2626,7 @@ static int decode_thread(void *arg)
         av_close_input_file(is->ic);
         is->ic = NULL; /* safety */
     }
-    url_set_interrupt_cb(NULL);
+    avio_set_interrupt_cb(NULL);
 
     if (ret != 0) {
         SDL_Event event;
diff --git a/ffserver.c b/ffserver.c
index 50f050ce30..6e429799ae 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -3427,7 +3427,7 @@ static int rtp_new_av_stream(HTTPContext *c,
                      "rtp://%s:%d", ipaddr, ntohs(dest_addr->sin_port));
         }
 
-        if (url_open(&h, ctx->filename, URL_WRONLY) < 0)
+        if (url_open(&h, ctx->filename, AVIO_WRONLY) < 0)
             goto fail;
         c->rtp_handles[stream_index] = h;
         max_packet_size = url_get_max_packet_size(h);
@@ -3767,7 +3767,7 @@ static void build_feed_streams(void)
             }
 
             /* only write the header of the ffm file */
-            if (avio_open(&s->pb, feed->feed_filename, URL_WRONLY) < 0) {
+            if (avio_open(&s->pb, feed->feed_filename, AVIO_WRONLY) < 0) {
                 http_log("Could not open output feed file '%s'\n",
                          feed->feed_filename);
                 exit(1);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index c6fb2efaf4..f3d255c75e 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2601,7 +2601,7 @@ typedef struct AVCodecContext {
      */
     int64_t timecode_frame_start;
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
+#if FF_API_REQUEST_CHANNELS
     /**
      * Decoder should decode to this many channels if it can (0 for default)
      * - encoding: unused
diff --git a/libavcodec/options.c b/libavcodec/options.c
index f6010bc638..404398fed6 100644
--- a/libavcodec/options.c
+++ b/libavcodec/options.c
@@ -408,7 +408,9 @@ static const AVOption options[]={
 {"timecode_frame_start", "GOP timecode frame start number, in non drop frame format", OFFSET(timecode_frame_start), FF_OPT_TYPE_INT64, 0, 0, INT64_MAX, V|E},
 {"drop_frame_timecode", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_DROP_FRAME_TIMECODE, INT_MIN, INT_MAX, V|E, "flags2"},
 {"non_linear_q", "use non linear quantizer", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NON_LINEAR_QUANT, INT_MIN, INT_MAX, V|E, "flags2"},
+#if FF_API_REQUEST_CHANNELS
 {"request_channels", "set desired number of audio channels", OFFSET(request_channels), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|D},
+#endif
 {"drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), FF_OPT_TYPE_FLOAT, 1.0, 0.0, 1.0, A|D},
 {"reservoir", "use bit reservoir", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BIT_RESERVOIR, INT_MIN, INT_MAX, A|E, "flags2"},
 {"mbtree", "use macroblock tree ratecontrol (x264 only)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_MBTREE, INT_MIN, INT_MAX, V|E, "flags2"},
diff --git a/libavcodec/version.h b/libavcodec/version.h
index b93e7534bb..b60e264d7f 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -83,5 +83,8 @@
 #ifndef FF_API_ANTIALIAS_ALGO
 #define FF_API_ANTIALIAS_ALGO   (LIBAVCODEC_VERSION_MAJOR < 54)
 #endif
+#ifndef FF_API_REQUEST_CHANNELS
+#define FF_API_REQUEST_CHANNELS (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
 
 #endif /* AVCODEC_VERSION_H */
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index ba4eac35e1..f0e98eddbe 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -21,6 +21,7 @@
 #include "avformat.h"
 #include "rtp.h"
 #include "rdt.h"
+#include "url.h"
 
 #define REGISTER_MUXER(X,x) { \
     extern AVOutputFormat ff_##x##_muxer; \
@@ -34,7 +35,7 @@
 
 #define REGISTER_PROTOCOL(X,x) { \
     extern URLProtocol ff_##x##_protocol; \
-    if(CONFIG_##X##_PROTOCOL) av_register_protocol2(&ff_##x##_protocol, sizeof(ff_##x##_protocol)); }
+    if(CONFIG_##X##_PROTOCOL) ffurl_register_protocol(&ff_##x##_protocol, sizeof(ff_##x##_protocol)); }
 
 void av_register_all(void)
 {
diff --git a/libavformat/applehttp.c b/libavformat/applehttp.c
index 639cfcdce4..44a27a510e 100644
--- a/libavformat/applehttp.c
+++ b/libavformat/applehttp.c
@@ -31,6 +31,7 @@
 #include "internal.h"
 #include <unistd.h>
 #include "avio_internal.h"
+#include "url.h"
 
 #define INITIAL_BUFFER_SIZE 32768
 
@@ -169,7 +170,7 @@ static int parse_playlist(AppleHTTPContext *c, const char *url,
 
     if (!in) {
         close_in = 1;
-        if ((ret = avio_open(&in, url, URL_RDONLY)) < 0)
+        if ((ret = avio_open(&in, url, AVIO_RDONLY)) < 0)
             return ret;
     }
 
@@ -292,7 +293,7 @@ static int read_data(void *opaque, uint8_t *buf, int buf_size)
 
         ret = url_open(&v->input,
                        v->segments[v->cur_seq_no - v->start_seq_no]->url,
-                       URL_RDONLY);
+                       AVIO_RDONLY);
         if (ret < 0)
             return ret;
     }
diff --git a/libavformat/applehttpproto.c b/libavformat/applehttpproto.c
index 168b2513bb..850292af2d 100644
--- a/libavformat/applehttpproto.c
+++ b/libavformat/applehttpproto.c
@@ -115,7 +115,7 @@ static int parse_playlist(URLContext *h, const char *url)
     char line[1024];
     const char *ptr;
 
-    if ((ret = avio_open(&in, url, URL_RDONLY)) < 0)
+    if ((ret = avio_open(&in, url, AVIO_RDONLY)) < 0)
         return ret;
 
     read_chomp_line(in, line, sizeof(line));
@@ -180,7 +180,7 @@ static int applehttp_open(URLContext *h, const char *uri, int flags)
     int ret, i;
     const char *nested_url;
 
-    if (flags & (URL_WRONLY | URL_RDWR))
+    if (flags & (AVIO_WRONLY | AVIO_RDWR))
         return AVERROR(ENOSYS);
 
     s = av_mallocz(sizeof(AppleHTTPContext));
@@ -275,7 +275,7 @@ static int applehttp_read(URLContext *h, uint8_t *buf, int size)
     }
     url = s->segments[s->cur_seq_no - s->start_seq_no]->url,
     av_log(NULL, AV_LOG_DEBUG, "opening %s\n", url);
-    ret = ffurl_open(&s->seg_hd, url, URL_RDONLY);
+    ret = ffurl_open(&s->seg_hd, url, AVIO_RDONLY);
     if (ret < 0) {
         if (url_interrupt_cb())
             return AVERROR_EXIT;
diff --git a/libavformat/avio.c b/libavformat/avio.c
index ddaafc84ea..7b066e3c08 100644
--- a/libavformat/avio.c
+++ b/libavformat/avio.c
@@ -57,7 +57,7 @@ URLProtocol *av_protocol_next(URLProtocol *p)
     else  return first_protocol;
 }
 
-int av_register_protocol2(URLProtocol *protocol, int size)
+int ffurl_register_protocol(URLProtocol *protocol, int size)
 {
     URLProtocol **p;
     if (size < sizeof(URLProtocol)) {
@@ -86,12 +86,12 @@ struct URLProtocol_compat {
 
 int av_register_protocol(URLProtocol *protocol)
 {
-    return av_register_protocol2(protocol, sizeof(struct URLProtocol_compat));
+    return ffurl_register_protocol(protocol, sizeof(struct URLProtocol_compat));
 }
 
 int register_protocol(URLProtocol *protocol)
 {
-    return av_register_protocol2(protocol, sizeof(struct URLProtocol_compat));
+    return ffurl_register_protocol(protocol, sizeof(struct URLProtocol_compat));
 }
 #endif
 
@@ -144,7 +144,7 @@ int ffurl_connect(URLContext* uc)
         return err;
     uc->is_connected = 1;
     //We must be careful here as ffurl_seek() could be slow, for example for http
-    if(   (uc->flags & (URL_WRONLY | URL_RDWR))
+    if(   (uc->flags & (AVIO_WRONLY | AVIO_RDWR))
        || !strcmp(uc->prot->name, "file"))
         if(!uc->is_streamed && ffurl_seek(uc, 0, SEEK_SET) < 0)
             uc->is_streamed= 1;
@@ -216,6 +216,14 @@ void url_get_filename(URLContext *h, char *buf, int buf_size)
 {
     av_strlcpy(buf, h->filename, buf_size);
 }
+void url_set_interrupt_cb(URLInterruptCB *interrupt_cb)
+{
+    avio_set_interrupt_cb(interrupt_cb);
+}
+int av_register_protocol2(URLProtocol *protocol, int size)
+{
+    return ffurl_register_protocol(protocol, size);
+}
 #endif
 
 #define URL_SCHEME_CHARS                        \
@@ -275,7 +283,7 @@ static inline int retry_transfer_wrapper(URLContext *h, unsigned char *buf, int
         ret = transfer_func(h, buf+len, size-len);
         if (ret == AVERROR(EINTR))
             continue;
-        if (h->flags & URL_FLAG_NONBLOCK)
+        if (h->flags & AVIO_FLAG_NONBLOCK)
             return ret;
         if (ret == AVERROR(EAGAIN)) {
             ret = 0;
@@ -296,21 +304,21 @@ static inline int retry_transfer_wrapper(URLContext *h, unsigned char *buf, int
 
 int ffurl_read(URLContext *h, unsigned char *buf, int size)
 {
-    if (h->flags & URL_WRONLY)
+    if (h->flags & AVIO_WRONLY)
         return AVERROR(EIO);
     return retry_transfer_wrapper(h, buf, size, 1, h->prot->url_read);
 }
 
 int ffurl_read_complete(URLContext *h, unsigned char *buf, int size)
 {
-    if (h->flags & URL_WRONLY)
+    if (h->flags & AVIO_WRONLY)
         return AVERROR(EIO);
     return retry_transfer_wrapper(h, buf, size, size, h->prot->url_read);
 }
 
 int ffurl_write(URLContext *h, const unsigned char *buf, int size)
 {
-    if (!(h->flags & (URL_WRONLY | URL_RDWR)))
+    if (!(h->flags & (AVIO_WRONLY | AVIO_RDWR)))
         return AVERROR(EIO);
     /* avoid sending too big packets */
     if (h->max_packet_size && size > h->max_packet_size)
@@ -348,7 +356,7 @@ int ffurl_close(URLContext *h)
 int url_exist(const char *filename)
 {
     URLContext *h;
-    if (ffurl_open(&h, filename, URL_RDONLY) < 0)
+    if (ffurl_open(&h, filename, AVIO_RDONLY) < 0)
         return 0;
     ffurl_close(h);
     return 1;
@@ -381,7 +389,7 @@ static int default_interrupt_cb(void)
     return 0;
 }
 
-void url_set_interrupt_cb(URLInterruptCB *interrupt_cb)
+void avio_set_interrupt_cb(URLInterruptCB *interrupt_cb)
 {
     if (!interrupt_cb)
         interrupt_cb = default_interrupt_cb;
diff --git a/libavformat/avio.h b/libavformat/avio.h
index dd22acfed7..03b6f6f5ec 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -63,7 +63,6 @@ typedef struct URLPollEntry {
     int events;
     int revents;
 } URLPollEntry;
-#endif
 
 /**
  * @defgroup open_modes URL open modes
@@ -91,6 +90,7 @@ typedef struct URLPollEntry {
  * silently ignored.
  */
 #define URL_FLAG_NONBLOCK 4
+#endif
 
 typedef int URLInterruptCB(void);
 
@@ -117,6 +117,7 @@ attribute_deprecated void url_get_filename(URLContext *h, char *buf, int buf_siz
 attribute_deprecated int av_url_read_pause(URLContext *h, int pause);
 attribute_deprecated int64_t av_url_read_seek(URLContext *h, int stream_index,
                                               int64_t timestamp, int flags);
+attribute_deprecated void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
 #endif
 
 /**
@@ -131,7 +132,7 @@ int url_exist(const char *url);
  * in this case by the interrupted function. 'NULL' means no interrupt
  * callback is given.
  */
-void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
+void avio_set_interrupt_cb(URLInterruptCB *interrupt_cb);
 
 #if FF_API_OLD_AVIO
 /* not implemented */
@@ -162,7 +163,9 @@ typedef struct URLProtocol {
 extern URLProtocol *first_protocol;
 #endif
 
+#if FF_API_OLD_AVIO
 extern URLInterruptCB *url_interrupt_cb;
+#endif
 
 /**
  * If protocol is NULL, returns the first registered protocol,
@@ -183,12 +186,14 @@ attribute_deprecated int register_protocol(URLProtocol *protocol);
 attribute_deprecated int av_register_protocol(URLProtocol *protocol);
 #endif
 
+#if FF_API_OLD_AVIO
 /**
  * Register the URLProtocol protocol.
  *
  * @param size the size of the URLProtocol struct referenced
  */
-int av_register_protocol2(URLProtocol *protocol, int size);
+attribute_deprecated int av_register_protocol2(URLProtocol *protocol, int size);
+#endif
 
 #define AVIO_SEEKABLE_NORMAL 0x0001 /**< Seeking works like for a local file */
 
@@ -510,6 +515,33 @@ attribute_deprecated static inline int url_is_streamed(AVIOContext *s)
 int url_resetbuf(AVIOContext *s, int flags);
 #endif
 
+/**
+ * @defgroup open_modes URL open modes
+ * The flags argument to avio_open must be one of the following
+ * constants, optionally ORed with other flags.
+ * @{
+ */
+#define AVIO_RDONLY 0  /**< read-only */
+#define AVIO_WRONLY 1  /**< write-only */
+#define AVIO_RDWR   2  /**< read-write */
+/**
+ * @}
+ */
+
+/**
+ * Use non-blocking mode.
+ * If this flag is set, operations on the context will return
+ * AVERROR(EAGAIN) if they can not be performed immediately.
+ * If this flag is not set, operations on the context will never return
+ * AVERROR(EAGAIN).
+ * Note that this flag does not affect the opening/connecting of the
+ * context. Connecting a protocol will always block if necessary (e.g. on
+ * network protocols) but never hang (e.g. on busy devices).
+ * Warning: non-blocking protocols is work-in-progress; this flag may be
+ * silently ignored.
+ */
+#define AVIO_FLAG_NONBLOCK 4
+
 /**
  * Create and initialize a AVIOContext for accessing the
  * resource indicated by url.
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 1472380acf..fb6a0c7b69 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -55,7 +55,7 @@ int ffio_init_context(AVIOContext *s,
     s->buffer_size = buffer_size;
     s->buf_ptr = buffer;
     s->opaque = opaque;
-    url_resetbuf(s, write_flag ? URL_WRONLY : URL_RDONLY);
+    url_resetbuf(s, write_flag ? AVIO_WRONLY : AVIO_RDONLY);
     s->write_packet = write_packet;
     s->read_packet = read_packet;
     s->seek = seek;
@@ -854,7 +854,7 @@ int ffio_fdopen(AVIOContext **s, URLContext *h)
     }
 
     if (ffio_init_context(*s, buffer, buffer_size,
-                      (h->flags & URL_WRONLY || h->flags & URL_RDWR), h,
+                      (h->flags & AVIO_WRONLY || h->flags & AVIO_RDWR), h,
                       ffurl_read, ffurl_write, ffurl_seek) < 0) {
         av_free(buffer);
         av_freep(s);
@@ -883,7 +883,7 @@ int ffio_set_buf_size(AVIOContext *s, int buf_size)
     s->buffer = buffer;
     s->buffer_size = buf_size;
     s->buf_ptr = buffer;
-    url_resetbuf(s, s->write_flag ? URL_WRONLY : URL_RDONLY);
+    url_resetbuf(s, s->write_flag ? AVIO_WRONLY : AVIO_RDONLY);
     return 0;
 }
 
@@ -894,13 +894,13 @@ static int url_resetbuf(AVIOContext *s, int flags)
 #endif
 {
 #if FF_API_URL_RESETBUF
-    if (flags & URL_RDWR)
+    if (flags & AVIO_RDWR)
         return AVERROR(EINVAL);
 #else
-    assert(flags == URL_WRONLY || flags == URL_RDONLY);
+    assert(flags == AVIO_WRONLY || flags == AVIO_RDONLY);
 #endif
 
-    if (flags & URL_WRONLY) {
+    if (flags & AVIO_WRONLY) {
         s->buf_end = s->buffer + s->buffer_size;
         s->write_flag = 1;
     } else {
@@ -1058,7 +1058,7 @@ int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags)
     if(!*s)
         return AVERROR(ENOMEM);
     ret = ffio_init_context(*s, buf, buf_size,
-                        (flags & URL_WRONLY || flags & URL_RDWR),
+                        (flags & AVIO_WRONLY || flags & AVIO_RDWR),
                         NULL, NULL, NULL, NULL);
     if(ret != 0)
         av_freep(s);
diff --git a/libavformat/file.c b/libavformat/file.c
index 4f14b9f6c6..b8c7c4c9d4 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -59,9 +59,9 @@ static int file_open(URLContext *h, const char *filename, int flags)
 
     av_strstart(filename, "file:", &filename);
 
-    if (flags & URL_RDWR) {
+    if (flags & AVIO_RDWR) {
         access = O_CREAT | O_TRUNC | O_RDWR;
-    } else if (flags & URL_WRONLY) {
+    } else if (flags & AVIO_WRONLY) {
         access = O_CREAT | O_TRUNC | O_WRONLY;
     } else {
         access = O_RDONLY;
@@ -116,7 +116,7 @@ static int pipe_open(URLContext *h, const char *filename, int flags)
 
     fd = strtol(filename, &final, 10);
     if((filename == final) || *final ) {/* No digits found, or something like 10ab */
-        if (flags & URL_WRONLY) {
+        if (flags & AVIO_WRONLY) {
             fd = 1;
         } else {
             fd = 0;
diff --git a/libavformat/gopher.c b/libavformat/gopher.c
index 85a9d965c4..6f80c1bc84 100644
--- a/libavformat/gopher.c
+++ b/libavformat/gopher.c
@@ -100,7 +100,7 @@ static int gopher_open(URLContext *h, const char *uri, int flags)
     ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
 
     s->hd = NULL;
-    err = ffurl_open(&s->hd, buf, URL_RDWR);
+    err = ffurl_open(&s->hd, buf, AVIO_RDWR);
     if (err < 0)
         goto fail;
 
diff --git a/libavformat/http.c b/libavformat/http.c
index 8c6181417a..51e84850f2 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -124,7 +124,7 @@ static int http_open_cnx(URLContext *h)
         port = 80;
 
     ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
-    err = ffurl_open(&hd, buf, URL_RDWR);
+    err = ffurl_open(&hd, buf, AVIO_RDWR);
     if (err < 0)
         goto fail;
 
@@ -296,7 +296,7 @@ static int http_connect(URLContext *h, const char *path, const char *hoststr,
 
 
     /* send http header */
-    post = h->flags & URL_WRONLY;
+    post = h->flags & AVIO_WRONLY;
     authstr = ff_http_auth_create_response(&s->auth_state, auth, path,
                                         post ? "POST" : "GET");
 
@@ -451,7 +451,7 @@ static int http_close(URLContext *h)
     HTTPContext *s = h->priv_data;
 
     /* signal end of chunked encoding if used */
-    if ((h->flags & URL_WRONLY) && s->chunksize != -1) {
+    if ((h->flags & AVIO_WRONLY) && s->chunksize != -1) {
         ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
         ret = ret > 0 ? 0 : ret;
     }
diff --git a/libavformat/img2.c b/libavformat/img2.c
index 7480d43bfe..4e55c22ccc 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -274,7 +274,7 @@ static int read_packet(AVFormatContext *s1, AVPacket *pkt)
                                   s->path, s->img_number)<0 && s->img_number > 1)
             return AVERROR(EIO);
         for(i=0; i<3; i++){
-            if (avio_open(&f[i], filename, URL_RDONLY) < 0) {
+            if (avio_open(&f[i], filename, AVIO_RDONLY) < 0) {
                 if(i==1)
                     break;
                 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
@@ -361,7 +361,7 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
             return AVERROR(EIO);
         }
         for(i=0; i<3; i++){
-            if (avio_open(&pb[i], filename, URL_WRONLY) < 0) {
+            if (avio_open(&pb[i], filename, AVIO_WRONLY) < 0) {
                 av_log(s, AV_LOG_ERROR, "Could not open file : %s\n",filename);
                 return AVERROR(EIO);
             }
diff --git a/libavformat/librtmp.c b/libavformat/librtmp.c
index 632ac95dd3..352d58fd4b 100644
--- a/libavformat/librtmp.c
+++ b/libavformat/librtmp.c
@@ -93,7 +93,7 @@ static int rtmp_open(URLContext *s, const char *uri, int flags)
         goto fail;
     }
 
-    if (flags & URL_WRONLY)
+    if (flags & AVIO_WRONLY)
         RTMP_EnableWrite(r);
 
     if (!RTMP_Connect(r, NULL) || !RTMP_ConnectStream(r, 0)) {
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index e69b848f78..55f62b8f6f 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1333,7 +1333,7 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
                    && track->codec_priv.size >= 14
                    && track->codec_priv.data != NULL) {
             ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
-                          URL_RDONLY, NULL, NULL, NULL, NULL);
+                          AVIO_RDONLY, NULL, NULL, NULL, NULL);
             ff_get_wav_header(&b, st->codec, track->codec_priv.size);
             codec_id = st->codec->codec_id;
             extradata_offset = FFMIN(track->codec_priv.size, 18);
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 732a5855ab..5ce2a541da 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -1144,10 +1144,13 @@ static int mkv_write_trailer(AVFormatContext *s)
     }
 
     if (pb->seekable) {
-        cuespos = mkv_write_cues(pb, mkv->cues, s->nb_streams);
+        if (mkv->cues->num_entries) {
+            cuespos = mkv_write_cues(pb, mkv->cues, s->nb_streams);
+
+            ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos);
+            if (ret < 0) return ret;
+        }
 
-        ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES    , cuespos);
-        if (ret < 0) return ret;
         mkv_write_seekhead(pb, mkv->main_seekhead);
 
         // update the duration
diff --git a/libavformat/md5proto.c b/libavformat/md5proto.c
index 421808bb8a..35a0d31305 100644
--- a/libavformat/md5proto.c
+++ b/libavformat/md5proto.c
@@ -36,7 +36,7 @@ static int md5_open(URLContext *h, const char *filename, int flags)
         return -1;
     }
 
-    if (flags != URL_WRONLY)
+    if (flags != AVIO_WRONLY)
         return AVERROR(EINVAL);
 
     av_md5_init(h->priv_data);
@@ -65,7 +65,7 @@ static int md5_close(URLContext *h)
     av_strstart(filename, "md5:", &filename);
 
     if (*filename) {
-        err = ffurl_open(&out, filename, URL_WRONLY);
+        err = ffurl_open(&out, filename, AVIO_WRONLY);
         if (err)
             return err;
         err = ffurl_write(out, buf, i*2+1);
diff --git a/libavformat/mmsh.c b/libavformat/mmsh.c
index 476596c78f..70664b9776 100644
--- a/libavformat/mmsh.c
+++ b/libavformat/mmsh.c
@@ -233,7 +233,7 @@ static int mmsh_open(URLContext *h, const char *uri, int flags)
         port = 80; // default mmsh protocol port
     ff_url_join(httpname, sizeof(httpname), "http", NULL, host, port, path);
 
-    if (ffurl_alloc(&mms->mms_hd, httpname, URL_RDONLY) < 0) {
+    if (ffurl_alloc(&mms->mms_hd, httpname, AVIO_RDONLY) < 0) {
         return AVERROR(EIO);
     }
 
@@ -261,7 +261,7 @@ static int mmsh_open(URLContext *h, const char *uri, int flags)
     // close the socket and then reopen it for sending the second play request.
     ffurl_close(mms->mms_hd);
     memset(headers, 0, sizeof(headers));
-    if (ffurl_alloc(&mms->mms_hd, httpname, URL_RDONLY) < 0) {
+    if (ffurl_alloc(&mms->mms_hd, httpname, AVIO_RDONLY) < 0) {
         return AVERROR(EIO);
     }
     stream_selection = av_mallocz(mms->stream_num * 19 + 1);
diff --git a/libavformat/mmst.c b/libavformat/mmst.c
index d7a1dda5bd..55a41e6a9c 100644
--- a/libavformat/mmst.c
+++ b/libavformat/mmst.c
@@ -523,7 +523,7 @@ static int mms_open(URLContext *h, const char *uri, int flags)
 
     // establish tcp connection.
     ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, mmst->host, port, NULL);
-    err = ffurl_open(&mms->mms_hd, tcpname, URL_RDWR);
+    err = ffurl_open(&mms->mms_hd, tcpname, AVIO_RDWR);
     if (err)
         goto fail;
 
diff --git a/libavformat/mov.c b/libavformat/mov.c
index a4cd4d6b28..89b9adc7af 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1722,7 +1722,7 @@ static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref)
 
             av_strlcat(filename, ref->path + l + 1, 1024);
 
-            if (!avio_open(pb, filename, URL_RDONLY))
+            if (!avio_open(pb, filename, AVIO_RDONLY))
                 return 0;
         }
     }
diff --git a/libavformat/network.h b/libavformat/network.h
index 58a8e80e72..74e6f0bbcc 100644
--- a/libavformat/network.h
+++ b/libavformat/network.h
@@ -22,6 +22,7 @@
 #define AVFORMAT_NETWORK_H
 
 #include "config.h"
+#include "os_support.h"
 
 #if HAVE_WINSOCK2_H
 #include <winsock2.h>
@@ -55,6 +56,10 @@ static inline int ff_neterrno() {
 #include <arpa/inet.h>
 #endif
 
+#if HAVE_POLL_H
+#include <poll.h>
+#endif
+
 int ff_socket_nonblock(int socket, int enable);
 
 static inline int ff_network_init(void)
@@ -67,6 +72,15 @@ static inline int ff_network_init(void)
     return 1;
 }
 
+static inline int ff_network_wait_fd(int fd, int write)
+{
+    int ev = write ? POLLOUT : POLLIN;
+    struct pollfd p = { .fd = fd, .events = ev, .revents = 0 };
+    int ret;
+    ret = poll(&p, 1, 100);
+    return ret < 0 ? ff_neterrno() : p.revents & ev ? 0 : AVERROR(EAGAIN);
+}
+
 static inline void ff_network_close(void)
 {
 #if HAVE_WINSOCK2_H
diff --git a/libavformat/output-example.c b/libavformat/output-example.c
index b6be2b97db..27db78c658 100644
--- a/libavformat/output-example.c
+++ b/libavformat/output-example.c
@@ -492,7 +492,7 @@ int main(int argc, char **argv)
 
     /* open the output file, if needed */
     if (!(fmt->flags & AVFMT_NOFILE)) {
-        if (avio_open(&oc->pb, filename, URL_WRONLY) < 0) {
+        if (avio_open(&oc->pb, filename, AVIO_WRONLY) < 0) {
             fprintf(stderr, "Could not open '%s'\n", filename);
             exit(1);
         }
diff --git a/libavformat/rtmpproto.c b/libavformat/rtmpproto.c
index 3309038b34..73bb4d2f69 100644
--- a/libavformat/rtmpproto.c
+++ b/libavformat/rtmpproto.c
@@ -812,7 +812,7 @@ static int rtmp_open(URLContext *s, const char *uri, int flags)
     if (!rt)
         return AVERROR(ENOMEM);
     s->priv_data = rt;
-    rt->is_input = !(flags & URL_WRONLY);
+    rt->is_input = !(flags & AVIO_WRONLY);
 
     av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
                  path, sizeof(path), s->filename);
@@ -821,7 +821,7 @@ static int rtmp_open(URLContext *s, const char *uri, int flags)
         port = RTMP_DEFAULT_PORT;
     ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
 
-    if (ffurl_open(&rt->stream, buf, URL_RDWR) < 0) {
+    if (ffurl_open(&rt->stream, buf, AVIO_RDWR) < 0) {
         av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot open connection %s\n", buf);
         goto fail;
     }
diff --git a/libavformat/rtpproto.c b/libavformat/rtpproto.c
index 08f6c0a1e1..3e582c1937 100644
--- a/libavformat/rtpproto.c
+++ b/libavformat/rtpproto.c
@@ -145,7 +145,7 @@ static int rtp_open(URLContext *h, const char *uri, int flags)
     char path[1024];
     const char *p;
 
-    is_output = (flags & URL_WRONLY);
+    is_output = (flags & AVIO_WRONLY);
 
     s = av_mallocz(sizeof(RTPContext));
     if (!s)
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 1eba0cbcfe..8afca34240 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -1116,14 +1116,14 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
                                 "?localport=%d", j);
                     /* we will use two ports per rtp stream (rtp and rtcp) */
                     j += 2;
-                    if (ffurl_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
+                    if (ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_RDWR) == 0)
                         goto rtp_opened;
                 }
             }
 
 #if 0
             /* then try on any port */
-            if (ffurl_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
+            if (ffurl_open(&rtsp_st->rtp_handle, "rtp://", AVIO_RDONLY) < 0) {
                 err = AVERROR_INVALIDDATA;
                 goto fail;
             }
@@ -1269,7 +1269,7 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
                         namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
             ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
                         port, "?ttl=%d", ttl);
-            if (ffurl_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
+            if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_RDWR) < 0) {
                 err = AVERROR_INVALIDDATA;
                 goto fail;
             }
@@ -1396,7 +1396,7 @@ int ff_rtsp_connect(AVFormatContext *s)
                  av_get_random_seed(), av_get_random_seed());
 
         /* GET requests */
-        if (ffurl_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
+        if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_RDONLY) < 0) {
             err = AVERROR(EIO);
             goto fail;
         }
@@ -1417,7 +1417,7 @@ int ff_rtsp_connect(AVFormatContext *s)
         }
 
         /* POST requests */
-        if (ffurl_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
+        if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_WRONLY) < 0 ) {
             err = AVERROR(EIO);
             goto fail;
         }
@@ -1460,7 +1460,7 @@ int ff_rtsp_connect(AVFormatContext *s)
     } else {
         /* open the tcp connection */
         ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
-        if (ffurl_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
+        if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_RDWR) < 0) {
             err = AVERROR(EIO);
             goto fail;
         }
@@ -1807,7 +1807,7 @@ static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
                     namebuf, rtsp_st->sdp_port,
                     "?localport=%d&ttl=%d", rtsp_st->sdp_port,
                     rtsp_st->sdp_ttl);
-        if (ffurl_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
+        if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_RDWR) < 0) {
             err = AVERROR_INVALIDDATA;
             goto fail;
         }
@@ -1863,7 +1863,7 @@ static int rtp_read_header(AVFormatContext *s,
     if (!ff_network_init())
         return AVERROR(EIO);
 
-    ret = ffurl_open(&in, s->filename, URL_RDONLY);
+    ret = ffurl_open(&in, s->filename, AVIO_RDONLY);
     if (ret)
         goto fail;
 
diff --git a/libavformat/sapdec.c b/libavformat/sapdec.c
index 42507d34f1..2c4bc8689e 100644
--- a/libavformat/sapdec.c
+++ b/libavformat/sapdec.c
@@ -85,7 +85,7 @@ static int sap_read_header(AVFormatContext *s,
 
     ff_url_join(url, sizeof(url), "udp", NULL, host, port, "?localport=%d",
                 port);
-    ret = ffurl_open(&sap->ann_fd, url, URL_RDONLY);
+    ret = ffurl_open(&sap->ann_fd, url, AVIO_RDONLY);
     if (ret)
         goto fail;
 
diff --git a/libavformat/sapenc.c b/libavformat/sapenc.c
index 0569d790ce..e538bbb4a2 100644
--- a/libavformat/sapenc.c
+++ b/libavformat/sapenc.c
@@ -146,7 +146,7 @@ static int sap_write_header(AVFormatContext *s)
                     "?ttl=%d", ttl);
         if (!same_port)
             base_port += 2;
-        ret = ffurl_open(&fd, url, URL_WRONLY);
+        ret = ffurl_open(&fd, url, AVIO_WRONLY);
         if (ret) {
             ret = AVERROR(EIO);
             goto fail;
@@ -158,7 +158,7 @@ static int sap_write_header(AVFormatContext *s)
 
     ff_url_join(url, sizeof(url), "udp", NULL, announce_addr, port,
                 "?ttl=%d&connect=1", ttl);
-    ret = ffurl_open(&sap->ann_fd, url, URL_WRONLY);
+    ret = ffurl_open(&sap->ann_fd, url, AVIO_WRONLY);
     if (ret) {
         ret = AVERROR(EIO);
         goto fail;
diff --git a/libavformat/tcp.c b/libavformat/tcp.c
index fb94b63984..f0d1c4556f 100644
--- a/libavformat/tcp.c
+++ b/libavformat/tcp.c
@@ -19,10 +19,12 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
+#include "libavutil/parseutils.h"
 #include <unistd.h>
 #include "internal.h"
 #include "network.h"
 #include "os_support.h"
+#include "url.h"
 #if HAVE_POLL_H
 #include <poll.h>
 #endif
@@ -38,6 +40,9 @@ static int tcp_open(URLContext *h, const char *uri, int flags)
     struct addrinfo hints, *ai, *cur_ai;
     int port, fd = -1;
     TCPContext *s = NULL;
+    int listen_socket = 0;
+    const char *p;
+    char buf[256];
     int ret;
     socklen_t optlen;
     char hostname[1024],proto[1024],path[1024];
@@ -48,6 +53,11 @@ static int tcp_open(URLContext *h, const char *uri, int flags)
     if (strcmp(proto,"tcp") || port <= 0 || port >= 65536)
         return AVERROR(EINVAL);
 
+    p = strchr(uri, '?');
+    if (p) {
+        if (av_find_info_tag(buf, sizeof(buf), "listen", p))
+            listen_socket = 1;
+    }
     memset(&hints, 0, sizeof(hints));
     hints.ai_family = AF_UNSPEC;
     hints.ai_socktype = SOCK_STREAM;
@@ -66,10 +76,21 @@ static int tcp_open(URLContext *h, const char *uri, int flags)
     fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol);
     if (fd < 0)
         goto fail;
-    ff_socket_nonblock(fd, 1);
 
+    if (listen_socket) {
+        int fd1;
+        ret = bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
+        listen(fd, 1);
+        fd1 = accept(fd, NULL, NULL);
+        closesocket(fd);
+        fd = fd1;
+    } else {
  redo:
-    ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
+        ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
+    }
+
+    ff_socket_nonblock(fd, 1);
+
     if (ret < 0) {
         int timeout=50;
         struct pollfd p = {fd, POLLOUT, 0};
@@ -138,23 +159,13 @@ static int tcp_open(URLContext *h, const char *uri, int flags)
     return ret;
 }
 
-static int tcp_wait_fd(int fd, int write)
-{
-    int ev = write ? POLLOUT : POLLIN;
-    struct pollfd p = { .fd = fd, .events = ev, .revents = 0 };
-    int ret;
-
-    ret = poll(&p, 1, 100);
-    return ret < 0 ? ff_neterrno() : p.revents & ev ? 0 : AVERROR(EAGAIN);
-}
-
 static int tcp_read(URLContext *h, uint8_t *buf, int size)
 {
     TCPContext *s = h->priv_data;
     int ret;
 
-    if (!(h->flags & URL_FLAG_NONBLOCK)) {
-        ret = tcp_wait_fd(s->fd, 0);
+    if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
+        ret = ff_network_wait_fd(s->fd, 0);
         if (ret < 0)
             return ret;
     }
@@ -167,8 +178,8 @@ static int tcp_write(URLContext *h, const uint8_t *buf, int size)
     TCPContext *s = h->priv_data;
     int ret;
 
-    if (!(h->flags & URL_FLAG_NONBLOCK)) {
-        ret = tcp_wait_fd(s->fd, 1);
+    if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
+        ret = ff_network_wait_fd(s->fd, 1);
         if (ret < 0)
             return ret;
     }
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 25541845a9..fd0640fd88 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -33,9 +33,7 @@
 #include "internal.h"
 #include "network.h"
 #include "os_support.h"
-#if HAVE_POLL_H
-#include <poll.h>
-#endif
+#include "url.h"
 #include <sys/time.h>
 
 #ifndef IPV6_ADD_MEMBERSHIP
@@ -320,7 +318,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
     h->is_streamed = 1;
     h->max_packet_size = 1472;
 
-    is_output = (flags & URL_WRONLY);
+    is_output = (flags & AVIO_WRONLY);
 
     s = av_mallocz(sizeof(UDPContext));
     if (!s)
@@ -363,14 +361,14 @@ static int udp_open(URLContext *h, const char *uri, int flags)
     /* XXX: fix av_url_split */
     if (hostname[0] == '\0' || hostname[0] == '?') {
         /* only accepts null hostname if input */
-        if (flags & URL_WRONLY)
+        if (flags & AVIO_WRONLY)
             goto fail;
     } else {
         if (ff_udp_set_remote_url(h, uri) < 0)
             goto fail;
     }
 
-    if (s->is_multicast && !(h->flags & URL_WRONLY))
+    if (s->is_multicast && !(h->flags & AVIO_WRONLY))
         s->local_port = port;
     udp_fd = udp_socket_create(s, &my_addr, &len);
     if (udp_fd < 0)
@@ -387,7 +385,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
 
     /* the bind is needed to give a port to the socket now */
     /* if multicast, try the multicast address bind first */
-    if (s->is_multicast && !(h->flags & URL_WRONLY)) {
+    if (s->is_multicast && !(h->flags & AVIO_WRONLY)) {
         bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
     }
     /* bind to the local address if not multicast or if the multicast
@@ -400,7 +398,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
     s->local_port = udp_port(&my_addr, len);
 
     if (s->is_multicast) {
-        if (h->flags & URL_WRONLY) {
+        if (h->flags & AVIO_WRONLY) {
             /* output */
             if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
                 goto fail;
@@ -447,31 +445,15 @@ static int udp_open(URLContext *h, const char *uri, int flags)
 static int udp_read(URLContext *h, uint8_t *buf, int size)
 {
     UDPContext *s = h->priv_data;
-    struct pollfd p = {s->udp_fd, POLLIN, 0};
-    int len;
     int ret;
 
-    for(;;) {
-        if (url_interrupt_cb())
-            return AVERROR_EXIT;
-        ret = poll(&p, 1, 100);
-        if (ret < 0) {
-            if (ff_neterrno() == AVERROR(EINTR))
-                continue;
-            return AVERROR(EIO);
-        }
-        if (!(ret == 1 && p.revents & POLLIN))
-            continue;
-        len = recv(s->udp_fd, buf, size, 0);
-        if (len < 0) {
-            if (ff_neterrno() != AVERROR(EAGAIN) &&
-                ff_neterrno() != AVERROR(EINTR))
-                return AVERROR(EIO);
-        } else {
-            break;
-        }
+    if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
+        ret = ff_network_wait_fd(s->udp_fd, 0);
+        if (ret < 0)
+            return ret;
     }
-    return len;
+    ret = recv(s->udp_fd, buf, size, 0);
+    return ret < 0 ? ff_neterrno() : ret;
 }
 
 static int udp_write(URLContext *h, const uint8_t *buf, int size)
@@ -479,29 +461,27 @@ static int udp_write(URLContext *h, const uint8_t *buf, int size)
     UDPContext *s = h->priv_data;
     int ret;
 
-    for(;;) {
-        if (!s->is_connected) {
-            ret = sendto (s->udp_fd, buf, size, 0,
-                          (struct sockaddr *) &s->dest_addr,
-                          s->dest_addr_len);
-        } else
-            ret = send(s->udp_fd, buf, size, 0);
-        if (ret < 0) {
-            if (ff_neterrno() != AVERROR(EINTR) &&
-                ff_neterrno() != AVERROR(EAGAIN))
-                return ff_neterrno();
-        } else {
-            break;
-        }
+    if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
+        ret = ff_network_wait_fd(s->udp_fd, 1);
+        if (ret < 0)
+            return ret;
     }
-    return size;
+
+    if (!s->is_connected) {
+        ret = sendto (s->udp_fd, buf, size, 0,
+                      (struct sockaddr *) &s->dest_addr,
+                      s->dest_addr_len);
+    } else
+        ret = send(s->udp_fd, buf, size, 0);
+
+    return ret < 0 ? ff_neterrno() : ret;
 }
 
 static int udp_close(URLContext *h)
 {
     UDPContext *s = h->priv_data;
 
-    if (s->is_multicast && !(h->flags & URL_WRONLY))
+    if (s->is_multicast && !(h->flags & AVIO_WRONLY))
         udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
     closesocket(s->udp_fd);
     av_free(s);
diff --git a/libavformat/url.h b/libavformat/url.h
index 97652bb972..9f97db594f 100644
--- a/libavformat/url.h
+++ b/libavformat/url.h
@@ -30,6 +30,8 @@
 
 #if !FF_API_OLD_AVIO
 #define URL_PROTOCOL_FLAG_NESTED_SCHEME 1 /*< The protocol name can be the first part of a nested protocol scheme */
+
+extern URLInterruptCB *url_interrupt_cb;
 #endif
 
 /**
@@ -131,4 +133,11 @@ int64_t ffurl_size(URLContext *h);
  */
 int ffurl_get_file_handle(URLContext *h);
 
+/**
+ * Register the URLProtocol protocol.
+ *
+ * @param size the size of the URLProtocol struct referenced
+ */
+int ffurl_register_protocol(URLProtocol *protocol, int size);
+
 #endif //AVFORMAT_URL_H
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 0ea209c93c..d9aa6f1173 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -32,6 +32,7 @@
 #include "libavutil/avstring.h"
 #include "riff.h"
 #include "audiointerleave.h"
+#include "url.h"
 #include <sys/time.h>
 #include <time.h>
 #include <strings.h>
@@ -636,7 +637,7 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
        hack needed to handle RTSP/TCP */
     if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
         /* if no file needed do not try to open one */
-        if ((err=avio_open(&pb, filename, URL_RDONLY)) < 0) {
+        if ((err=avio_open(&pb, filename, AVIO_RDONLY)) < 0) {
             goto fail;
         }
         if (buf_size > 0) {
diff --git a/tests/ref/acodec/pcm b/tests/ref/acodec/pcm
index 1d876e4aca..033f8bc8c6 100644
--- a/tests/ref/acodec/pcm
+++ b/tests/ref/acodec/pcm
@@ -22,12 +22,12 @@ stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400
 1058444 ./tests/data/acodec/pcm_s16le.wav
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/pcm.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400
-352a6bcf51d0f3ca4bf27c423a3d4d14 *./tests/data/acodec/pcm_s16be.mkv
- 1060650 ./tests/data/acodec/pcm_s16be.mkv
+af717ca95eaca310772eb1238c745d1b *./tests/data/acodec/pcm_s16be.mkv
+1060638 ./tests/data/acodec/pcm_s16be.mkv
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/pcm.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400
-2c089d83b2699c02c9358415e00a9707 *./tests/data/acodec/pcm_s16le.mkv
- 1060650 ./tests/data/acodec/pcm_s16le.mkv
+c4f51bf32fad2f7af8ea5beedb56168b *./tests/data/acodec/pcm_s16le.mkv
+1060638 ./tests/data/acodec/pcm_s16le.mkv
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/pcm.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400
 07ffe7ffb78f3648b6524debdde5aec1 *./tests/data/acodec/pcm_s24be.mov