sig = bytestream2_get_be64(&s->gb);
if (sig != PNGSIG &&
sig != MNGSIG) {
- av_log(avctx, AV_LOG_ERROR, "Invalid PNG signature (%d).\n", buf_size);
+ av_log(avctx, AV_LOG_ERROR, "Invalid PNG signature 0x%08"PRIX64".\n", sig);
return AVERROR_INVALIDDATA;
}