A magic transition from E_BUFFER_NOT_FULL to E_FILE_FORMAT_INVALID in depths of libwebm… Media.dll!mkvparser::Block::Parse(const mkvparser::Cluster * pCluster) Line 7630 C++Media.dll!mkvparser::BlockGroup::Parse() Line 7579 C++Media.dll!mkvparser::Cluster::CreateBlockGroup(__int64 start_offset, __int64 size, __int64 discard_padding) Line 7253 C++Media.dll!mkvparser::Cluster::CreateBlock(__int64 id, __int64 pos, __int64 size, __int64 discard_padding) Line 7154 C++Media.dll!mkvparser::Cluster::ParseBlockGroup(__int64 payload_size, __int64 & pos, long & len) Line 6724 C++Media.dll!mkvparser::Cluster::Parse(__int64 & pos, long & len) Line…