@@ -1881,6 +1881,8 @@ static int decode_thread(void *arg)

     AVFormatParameters params, *ap = &params;

     int eof=0;

+    ic = avformat_alloc_context();

+

     video_index = -1;

     audio_index = -1;

     subtitle_index = -1;

@@ -1893,11 +1895,14 @@ static int decode_thread(void *arg)

     memset(ap, 0, sizeof(*ap));

+    ap->prealloced_context = 1;

     ap->width = frame_width;

     ap->height= frame_height;

     ap->time_base= (AVRational){1, 25};

     ap->pix_fmt = frame_pix_fmt;

+    set_context_opts(ic, avformat_opts, AV_OPT_FLAG_DECODING_PARAM);

+

     err = av_open_input_file(&ic, is->filename, is->iformat, 0, ap);

     if (err < 0) {

         print_error(is->filename, err);