Hmm, I reported this GAMMA issue before with a BluRay conversion around the beginning of June. Now I did a parallel conversion of a DV-compressed AVI file to a DVD-Video and a DCP, both on a Mac. While the DVD retains more or less the same contrast and colours as the AVI file, the DCP again came out a lot brighter with greyish blacks (played back on our DCI projector). The BluRay conversion I reported back in june was done with the windows version from a 1:1 rip/MKV container and it had the same issues. I needed to create a special format on the projector reducing brightness and saturation considerably to make it watchable. Hmm, I now see that DCP-o-matic has an explicit dialog for input/output gamma settings and color conversion matrix. Maybe I will try to do some tests to find out wether these issues can be solved by this. Really wondering why no one else is having this issue, as it is not just a minor variance but a heavy one. - Carsten