With some review by GG yesterday in hopes of finding something usable, here is some disappointing feedback.

1/22/19 - Cinelerra 7.1 Exporting of H.265 video in Quicktime. ...
I don't think CinGG has anything more to do with quicktime,
The developers at ffmpeg take care of quicktime which Cin-gg takes advantage of -- codecs is what they do and they are truly experts.
...Seeking for MKV/WEBM files
Who can explain to me what it is: "Seeking for MKV/WEBM files"?
Seeking is just non-sequential read, i.e. changing the position of the insertion pointer on the timeline BTW, as far as I was able to see, hv has not been able to do any seeks going backwards for a long time.

...More bugs fixed.
- After spending at least 2 hours getting 7.1 to compile in Fedora, gg was able to actually run it but only in debug mode and then still got a SEGV quite quickly.  Finally got mpeg/ts  media loaded and it would play sequentially. After another 3 hours of looking for potential usable bug fixes there was nothing that made any sense to port. 
- There is 1 new plugin, spheretranslate, which is surprising because it seems like it should have been put into the spherecam plugin.
- It seems most of the differences are modification of window_h and window_w from 100 to DP(100), i.e. a hard-coded number to a potential variable scaled size.  According to gg, this was not a very good way to do that and is much better done another way.  Eventually a true scaling operation, along with "strings" will be put into cin-gg.

so maybe it's a useless update for us.
And for everyone else.  In my opinion, the smart thing to do would be for both hv and cv to adopt gg as a good starting point so there is cinelerra software that all users can use and the confusion is ended once and for all.  But I guess we all know by now that that is never going to happen.   (Phyllis ONLY)