diff --git a/Changelog b/Changelog
index 9eec45c997..00dc6404ad 100644
--- a/Changelog
+++ b/Changelog
@@ -50,6 +50,7 @@ version <next>:
 - documentation split into per-component manuals
 - pp (postproc) filter ported from MPlayer
 - NIST Sphere demuxer
+- av_basename and av_dirname
 
 
 version 1.0:
diff --git a/doc/APIchanges b/doc/APIchanges
index b463749eba..a79dd2df58 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -132,6 +132,9 @@ API changes, most recent first:
 2012-03-26 - a67d9cf - lavfi 2.66.100
   Add avfilter_fill_frame_from_{audio_,}buffer_ref() functions.
 
+2012-xx-xx - xxxxxxx - lavu 52.2.1 - avstring.h
+  Add av_basename() and av_dirname().
+
 2012-11-10 - 5980f5dd - lavu 52.2.0 - audioconvert.h
   Rename audioconvert.h to channel_layout.h. audioconvert.h is now deprecated.
 
diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
index e85c8b0b53..75ae134649 100644
--- a/libavformat/hlsenc.c
+++ b/libavformat/hlsenc.c
@@ -85,7 +85,8 @@ static int append_entry(HLSContext *hls, uint64_t duration)
     if (!en)
         return AVERROR(ENOMEM);
 
-    av_get_frame_filename(en->name, sizeof(en->name), hls->basename,
+    av_get_frame_filename(en->name, sizeof(en->name),
+                          av_basename(hls->basename),
                           hls->number -1);
 
     en->duration = duration;
@@ -260,9 +261,12 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
         av_compare_ts(pkt->pts, st->time_base, end_pts, AV_TIME_BASE_Q) >= 0 &&
         pkt->flags & AV_PKT_FLAG_KEY) {
 
-        append_entry(hls, av_rescale(pkt->pts - hls->end_pts,
-                                     st->time_base.num,
-                                     st->time_base.den));
+        ret = append_entry(hls, av_rescale(pkt->pts - hls->end_pts,
+                                           st->time_base.num,
+                                           st->time_base.den));
+        if (ret)
+            return ret;
+
         hls->end_pts = pkt->pts;
 
         av_write_frame(oc, NULL); /* Flush any buffered data */
diff --git a/libavutil/avstring.c b/libavutil/avstring.c
index f03df67441..7072a55cf3 100644
--- a/libavutil/avstring.c
+++ b/libavutil/avstring.c
@@ -25,6 +25,8 @@
 #include <string.h>
 #include <ctype.h>
 #include "avstring.h"
+#include "config.h"
+#include "common.h"
 #include "mem.h"
 
 int av_strstart(const char *str, const char *pfx, const char **ptr)
@@ -211,6 +213,45 @@ int av_strncasecmp(const char *a, const char *b, size_t n)
     return c1 - c2;
 }
 
+const char *av_basename(const char *path)
+{
+    char *p = strrchr(path, '/');
+
+#if HAVE_DOS_PATHS
+    char *q = strrchr(path, '\\');
+    char *d = strchr(path, ':');
+
+    p = FFMAX3(p, q, d);
+#endif
+
+    if (!p)
+        return path;
+
+    return p + 1;
+}
+
+const char *av_dirname(char *path)
+{
+    char *p = strrchr(path, '/');
+
+#if HAVE_DOS_PATHS
+    char *q = strrchr(path, '\\');
+    char *d = strchr(path, ':');
+
+    d = d ? d + 1 : d;
+
+    p = FFMAX3(p, q, d);
+#endif
+
+    if (!p)
+        return ".";
+
+    *p = '\0';
+
+    return path;
+}
+
+
 #ifdef TEST
 
 #include "common.h"
diff --git a/libavutil/avstring.h b/libavutil/avstring.h
index f73d6e7420..d7af9ec7c3 100644
--- a/libavutil/avstring.h
+++ b/libavutil/avstring.h
@@ -202,6 +202,22 @@ int av_strcasecmp(const char *a, const char *b);
  */
 int av_strncasecmp(const char *a, const char *b, size_t n);
 
+
+/**
+ * Thread safe basename.
+ * @param path the path, on DOS both \ and / are considered separators.
+ * @return pointer to the basename substring.
+ */
+const char *av_basename(const char *path);
+
+/**
+ * Thread safe dirname.
+ * @param path the path, on DOS both \ and / are considered separators.
+ * @return the path with the separator replaced by the string terminator or ".".
+ * @note the function may change the input string.
+ */
+const char *av_dirname(char *path);
+
 /**
  * @}
  */
diff --git a/libavutil/version.h b/libavutil/version.h
index f5ccd1ff2b..e47e0d12b3 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -75,7 +75,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  52
-#define LIBAVUTIL_VERSION_MINOR  12
+#define LIBAVUTIL_VERSION_MINOR  13
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \