Well, if anybody is interested
, I did the same on my desktop; installed and uninstalled the Procoder2 demo, noting not too delete the "these files are no longer needed ...etc" files when prompted in the deinstallation. Lo and behold, no chroma sampling error
. I didnt note at the time what the residial dll's were but on running a registry check with RegCleaner, one appears to a remnant of the DV Booster Pack, in addition to the cdvccodc.dll decoder itself. This leaves me convinced that the so called "broken chroma upsampling bug" arises because the Canopus DV decoder was not intended to work in isolation from other files in the codec pack that assist in correct chroma upsampling.
However, my above claim that "Canopus-decoded" DV is more compressible than Cedocida (YUY2) was a little premature
. On further testing with a variety of clips, they appear to be very much the same.