Merge commit 'b2b79eca'

* commit 'b2b79eca':
  movenc: Don't check the custom IO flag when using faststart
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/movenc.c

@@ -4357,10 +4357,9 @@ static int mov_write_header(AVFormatContext *s)
 
     /* faststart: moov at the beginning of the file, if supported */
     if (mov->flags & FF_MOV_FLAG_FASTSTART) {
-        if ((mov->flags & FF_MOV_FLAG_FRAGMENT) ||
-            (s->flags & AVFMT_FLAG_CUSTOM_IO)) {
+        if (mov->flags & FF_MOV_FLAG_FRAGMENT) {
             av_log(s, AV_LOG_WARNING, "The faststart flag is incompatible "
-                   "with fragmentation and custom IO, disabling faststart\n");
+                   "with fragmentation, disabling faststart\n");
             mov->flags &= ~FF_MOV_FLAG_FASTSTART;
         } else
             mov->reserved_moov_size = -1;