ffmpeg roll of source to mar 9 version...

patched-ffmpeg-mt/libavformat/file.c

 /*
  * Buffered file io for ffmpeg system
  * Copyright (c) 2001 Fabrice Bellard
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
@@ skipping 55 matching lines @@
 static int file_write(URLContext *h, unsigned char *buf, int size)
 {
     int fd = (intptr_t) h->priv_data;
     return write(fd, buf, size);
 }
 
 /* XXX: use llseek */
 static int64_t file_seek(URLContext *h, int64_t pos, int whence)
 {
     int fd = (intptr_t) h->priv_data;
+    if (whence != SEEK_SET && whence != SEEK_CUR && whence != SEEK_END)
+        return AVERROR_NOTSUPP;
     return lseek(fd, pos, whence);
 }
 
 static int file_close(URLContext *h)
 {
     int fd = (intptr_t) h->priv_data;
     return close(fd);
 }
 
 static int file_get_handle(URLContext *h)
@@ skipping 35 matching lines @@
     return 0;
 }
 
 URLProtocol pipe_protocol = {
     "pipe",
     pipe_open,
     file_read,
     file_write,
     .url_get_file_handle = file_get_handle,
 };