Checked into GIT the first set of 50 files with additional GPL copyright message for CV-Contributors 2003-2016.  It is taking longer than I expected but I want to get it as correct as possible - probably another 150 to go.

> Now, one can wonder how much of this work survived into 2016? Files were merged with HV (and sometimes back) but for example autoconf-based build system was developed there and quite distinct from script HV uses. So, _as a team_ I think their contributions still alive even if it be quite hard to find exact lines from that time in current code.
 
Yes, their contributions are still alive and if I had to guess, at least 95%+ are but I did find a few that were not. and probably missed a very few.  By comparing "before" and "after" of the last Cinelerra 5.0 to the first beta “Cinelerra 5.1” I was able to somewhat detect when CV changes were added (as opposed to HV changes which already have a GPL attribution) and these files are the ones that had the CV-Contributors attribute added.  I am being as thorough as I can be so as not to miss any but will never be 100% sure.   Many of the 1 or 2 line changes are "interlace" related or an "include" file while some of the other one line changes are bug fixes -- these are the hardest to find and the most important to have.  And, of course, the other most important changes are the new features added by the CV contributors.
...
> please also try to git log in unpacked google code archive, it provides some info on merges before attempted beta release ( I'll look up email archive at date you found)
>

There is link to email archived posting

https://lists.cinelerra-cv.org/pipermail/cinelerra/2016q1/004236.html

====== original message ====

Cinelerra 5.0 now is BETA “Cinelerra 5.1” with these changes:

Merged in Operators and Methods from Adam's HV version      AND
Merged in User Interface Characteristics from CV      WHERE POSSIBLE.
...
Attempted to make the behavior of 5.1 as close to what is expected in the
stable CV version, but sometimes there were conflicts and a decision had to
be made to go the way CV code went or the way the HV code went.  It can be
changed if an incorrect decision was made.

Partial listing of which  CV/HV characteristics are now in and operational:

Apply Masks before plugins
Last Play position memory (new feature)
Free movement of fragments
Now there is 4 Selectable  Keyframes on curve types (superset CV&HV)
Label Anchor support
Lock labels from moving
Free Drag of Plugins (new feature)
Zoom Bar enhancements
Label Folder support
Asset Interlace support code (not sure how to test though)
Label Info Edit support
XML tag closer present
A toggle full selection Off as well as On (new feature)
Manual GoTo support
Reel Number / Timecode Support
Auto interpolation methods are now superset of CV and HV
Export EDL support
Fade-to-black via the fade histogram (render follows the compositor)
Images can be extended by dragging each edge of clip (with default duration)
Length of a transition is now displayed visually on the track.
Curve zoom can be set independently for different automation ranges
Allow for manually setting the min/max levels via typing for curve zoom
Shortcut to move tracks down and up via shift+down or shift+up
Dragging an effect “onto” a clip now shows the clip existing on the track
for the length of that clip (was for length of entire track previously)
Ability to choose to render the whole project, selected area or in/out
points (was render from the current cursor point)

Also, many bug fixes and code improvements that have gone into the Stable
CV version over many years, from many great developers are now in.  And
found some new problems that got fixed.