Previously we attempted to convert 411 input. Remove support
because malformed 411 input can cause the conversion to crash.
BUG=webm:1386
Change-Id: I3d41465a94867ee7f8eaa43fb76beb41f8fa644b
_y4m->aux_buf_sz =
_y4m->aux_buf_read_sz + ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
_y4m->convert = y4m_convert_411_420jpeg;
+ fprintf(stderr, "Unsupported conversion from yuv 411\n");
+ return -1;
} else if (strcmp(_y4m->chroma_type, "444") == 0) {
_y4m->src_c_dec_h = 1;
_y4m->src_c_dec_v = 1;