I am trying to make a BD, and I rendering my movies (in m2ts with no audio).
When creating the BD ISO file DVDA (5b) renders the MUI and theaudio tracks and then when creating the image generates an error, the error says;

"File name: STREAM/00001.m2ts
Status: TSWrapper.dll::CTSWrapper::ProcThreadMain::Video buffer underflows. - "

I have no idea what means.

Can anyone help?

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Well, I guess the old expression " when everything else fails read the instructions" is still true. I found a KB item # 4293 that I may help.