}
buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!buf2)
+ return AVERROR(ENOMEM);
+
start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv
next = start;
for (; next < end; start = next) {