Improved video-splitter changes by seeking back to try to resynch on I frames.

src/playlist/engine.c

@@ -140,7 +140,11 @@ static int VideoSplitterCallback( vlc_object_t *p_this, char const *psz_cmd,
     /* Force the input to restart the video ES to force a vout recreation */
     input_thread_t *p_input = pl_priv( p_playlist )->p_input;
     if( p_input )
+    {
+        const double f_position = var_GetFloat( p_input, "position" );
         input_Control( p_input, INPUT_RESTART_ES, -VIDEO_ES );
+        var_SetFloat( p_input, "position", f_position );
+    }
 
     PL_UNLOCK;
     return VLC_SUCCESS;