EXR_UNKN         1303 libavcodec/exr.c     s->compression        = EXR_UNKN;
EXR_UNKN         1555 libavcodec/exr.c             if (s->compression == EXR_UNKN)
EXR_UNKN         1619 libavcodec/exr.c     if (s->compression == EXR_UNKN) {