Index: libmpdemux/demux_lavf.c
===================================================================
--- libmpdemux/demux_lavf.c	(revision 30976)
+++ libmpdemux/demux_lavf.c	(working copy)
@@ -123,6 +123,16 @@
     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;
+
+    ret = av_url_read_seek(stream->priv, stream_idx, ts, flags);
+    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 +493,7 @@
 
     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){