libavfilter/vf_framepack.c:273: error: Uninitialized Value
  The value read from ret was never initialized.

libavfilter/vf_framepack.c:273:9: 
271.                 return ret;
272.         }
273.         return ret;
             ^
274.     } else {
275.         AVFrame *dst = ff_get_video_buffer(outlink, outlink->w, outlink->h);
