Original ffmpeg commit 2bb1c71 by Clément Bœsch.
---
 doc/protocols.texi | 4 ++++
 libavformat/http.c | 8 ++++++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/doc/protocols.texi b/doc/protocols.texi
index 9c32e9b..4a98550 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -92,6 +92,10 @@ HTTP (Hyper Text Transfer Protocol).
 This protocol accepts the following options:
 
 @table @option
+@item user_agent
+Override the User-Agent header. If not specified a string of the form
+"Lavf/<version>" will be used.
+
 @item mime_type
 Set MIME type.
 
diff --git a/libavformat/http.c b/libavformat/http.c
index 3130f8f..88265ff 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -51,6 +51,7 @@ typedef struct {
     int http_code;
     int64_t chunksize;      /**< Used if "Transfer-Encoding: chunked" 
otherwise -1. */
     int64_t off, filesize;
+    char *user_agent;
     int icy_data_read;      ///< how much data was read since last ICY 
metadata packet
     int icy_metaint;        ///< after how many bytes of read data a new 
metadata packet will be found
     char *location;
@@ -80,9 +81,12 @@ typedef struct {
 #define OFFSET(x) offsetof(HTTPContext, x)
 #define D AV_OPT_FLAG_DECODING_PARAM
 #define E AV_OPT_FLAG_ENCODING_PARAM
+#define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
 static const AVOption options[] = {
 {"chunked_post", "use chunked transfer-encoding for posts", 
OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
 {"headers", "custom HTTP headers, can override built in default headers", 
OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
+{"user_agent", "override User-Agent header", OFFSET(user_agent), 
AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D },
+{"user-agent", "override User-Agent header, for compatibility with ffmpeg", 
OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D },
 {"multiple_requests", "use persistent connections", OFFSET(multiple_requests), 
AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
 {"post_data", "custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, 
.flags = D|E },
 {"mime_type", "set MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, {0}, 0, 
0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY  },
@@ -505,8 +509,8 @@ static int http_connect(URLContext *h, const char *path, 
const char *local_path,
 
     /* set default headers if needed */
     if (!has_header(s->headers, "\r\nUser-Agent: "))
-       len += av_strlcatf(headers + len, sizeof(headers) - len,
-                          "User-Agent: %s\r\n", LIBAVFORMAT_IDENT);
+        len += av_strlcatf(headers + len, sizeof(headers) - len,
+                           "User-Agent: %s\r\n", s->user_agent);
     if (!has_header(s->headers, "\r\nAccept: "))
         len += av_strlcpy(headers + len, "Accept: */*\r\n",
                           sizeof(headers) - len);
-- 
1.9.0

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