Index: stream/stream_ffmpeg.c
===================================================================
--- stream/stream_ffmpeg.c	(revision 30976)
+++ stream/stream_ffmpeg.c	(working copy)
@@ -49,7 +49,8 @@
 
 static int control(stream_t *s, int cmd, void *arg)
 {
-    int64_t size;
+    int64_t size, ts;
+    double pts;
     switch(cmd) {
     case STREAM_CTRL_GET_SIZE:
         size = url_filesize(s->priv);
@@ -57,6 +58,14 @@
             *(off_t *)arg = size;
             return 1;
         }
+        break;
+    case STREAM_CTRL_SEEK_TO_TIME:
+        pts = *(double *)arg;
+        ts = pts * AV_TIME_BASE;
+        ts = av_url_read_seek(s->priv, -1, ts, 0);
+        if (ts >= 0)
+            return 1;
+        break;
     }
     return STREAM_UNSUPPORTED;
 }
Index: libmpdemux/demux_lavf.c
===================================================================
--- libmpdemux/demux_lavf.c	(revision 30976)
+++ libmpdemux/demux_lavf.c	(working copy)
@@ -123,6 +123,18 @@
     return pos - stream->start_pos;
 }
 
+static int mp_read_seek(void *opaque, int stream_idx, int64_t ts, int flags) {
+    stream_t *stream = opaque;
+    int ret;
+    double pts;
+
+    pts = (double)ts / AV_TIME_BASE;
+    ret = stream_control(stream, STREAM_CTRL_SEEK_TO_TIME, &pts);
+    if (ret >= 0)
+        stream_reset(stream);
+    return ret;
+}
+
 static void list_formats(void) {
     AVInputFormat *fmt;
     mp_msg(MSGT_DEMUX, MSGL_INFO, "Available lavf input formats:\n");
@@ -483,6 +495,7 @@
 
     priv->pb = av_alloc_put_byte(priv->buffer, BIO_BUFFER_SIZE, 0,
                                  demuxer->stream, mp_read, NULL, mp_seek);
+    priv->pb->read_seek = mp_read_seek;
     priv->pb->is_streamed = !demuxer->stream->end_pos || (demuxer->stream->flags & MP_STREAM_SEEK) != MP_STREAM_SEEK;
 
     if(av_open_input_stream(&avfc, priv->pb, mp_filename, priv->avif, &ap)<0){