@@ -2108,7 +2108,7 @@ static int transcode_init(void)

             }

             if (ist)

-                ist->decoding_needed = 1;

+                ist->decoding_needed++;

             ost->encoding_needed = 1;

             if (!ost->filter &&

@@ -266,7 +266,7 @@ static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)

     av_assert0(ist);

     ist->discard         = 0;

-    ist->decoding_needed = 1;

+    ist->decoding_needed++;

     ist->st->discard = AVDISCARD_NONE;

     fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),