I see in the umc reference manual a flag for mpeg2 decoder: FLAG_VDEC_COMPATIBLE. But in the code it's commented and probably not referenced in the code.
Is my manual not updated or the code I am using (last version, 5.3.083...)
Which version of umc-manual.pdf did you refer? I checked this pdf file included in IPP version 5.3 update 2 (w_ipp-samples_p_5.3.095.zip for Windows) and it does not include this flag.
The latest version of IPP 5.3 libraire is 5.3 update 3 ( updates only in libraries, the ID is 5.3.3.082 ), the latest version of IPP 5.3
Please upgrade the version and see if the infomration in both manual and code sample are consistent.