Allocate transcode buffer on heap rather than stack, to avoid crash with very large files.
Allocate transcode buffer on heap rather than stack, to avoid crash with
very large files.

rodoviario/wordgrinder,Munchotaur/wordgrinder,rodoviario/wordgrinder,Munchotaur/wordgrinder,NRauh/wordgrinder,NRauh/wordgrinder