H264.mov is a last resort for broadcast. ExtremeReach distribution uses ProRes. If you have a PC you can submit uncompressed,mpeg2 or Avid DNX HD. H264.mov quicktime has huge,unreliable gamma issues that are hard if not impossible to correct. You best bet is to avoid it and use and alternative. There is no way to correct the gamma issues with filters but there is a way to come close if you have Quicktime Pro.