transcode: run user speficied videofilters before overlays

For example crop/pad can change p_enc.in values, so run soverlay
in part that they are actually correct in p_pict.
(cherry picked from commit 82e22a4443bc431c4b0c759883db2960b492d97c)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/stream_out/transcode/video.c

@@ -696,6 +696,10 @@ int transcode_video_process( sout_stream_t *p_stream, sout_stream_id_t *id,
         if( id->p_f_chain )
             p_pic = filter_chain_VideoFilter( id->p_f_chain, p_pic );
 
+        /* Run user specified filter chain */
+        if( id->p_uf_chain )
+            p_pic = filter_chain_VideoFilter( id->p_uf_chain, p_pic );
+
         /*
          * Encoding
          */
@@ -737,10 +741,6 @@ int transcode_video_process( sout_stream_t *p_stream, sout_stream_id_t *id,
             }
         }
 
-        /* Run user specified filter chain */
-        if( id->p_uf_chain )
-            p_pic = filter_chain_VideoFilter( id->p_uf_chain, p_pic );
-
         if( p_sys->i_threads == 0 )
         {
             block_t *p_block;