Pkgs and tars for the end of the month build are ready for use.  We tested both the static tar and the system package on Mint 19 this time.  You can download them at:
     https://www.cinelerra-gg.org/download/
In addition the complete releasenotes.pdf are in that directory.
And now, presenting the Work-In-Progress (WIP) LaTex manual, which is incomplete but which includes the new Masking operations and all of the formatting enhancements that Andrea/Andrey have provided. 

     https://www.cinelerra-gg.org/download/CinelerraGG_manual_WIP.pdf

It is literally a work of art that they have created with all of the editing and formatting and being done in LaTex will make it much easier to keep it up to date.

This month's release notes are included below but here is some personal commentary. 
- I ran a test on rendering/encoding to VP8 and VP9 on a small file and did not see any speed improvement with libvpx, but really it was a very small file.
- FFmpeg upgrade to 4.2 has a couple of new filters and I do not understand a report of yuv420p10 issue.
- Dav1d inclusion was a big problem for the older system builds.  First, meson had to be at or above version 47 and only 5 out of 18 build systems were.  Consequently, GG ended up eliminating the "meson" requirement and substituting the standard "make" instead.  Then the "nasm" assembler on some of the older systems was not able to compile Dav1d so they had to be switched out for a working version.  More information on this later.
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Cinelerra-GG (Version Infinity)  Release Notes for 08/01/2019-08/31/2019 for builds

1. Upgraded ffmpeg from 4.1.4 to 4.2 (Andrew notification of official release).
2. O/S distros on developer’s build systems have had upgrades applied.
3. Libvpx has been upgraded from 1.8.0 to 1.8.1.  Per their release notes “various changes to improve
    encoder rate control, quality and speed for practically every use case” (Deim notification of release).
4.
Dav1d is being used in place of libAOM for decode only in ffmpeg, providing purported significant
    speedups of 2-5 times for AV1 media.  Encode is only available using libAOM so will still be slow
    (Mantis BugTracker #BT 214).  
5. Usability Improvements:
  Mask feathering algorithm has been improved by using an algorithm more close to the original based
     on a user request (User direct request).
   And Feathering which was limited to 100 pixels now allows for a much larger range by clicking on
     the button on either end and sliding at least 12 pixels past that point which increases it by a small
     percentage each time allowing you to move the slider past 100 (User direct request).
   Significant work was done on Feathering by the developer to improve performance and to ensure that
     using OpenGL as well as the X11 driver, produced the same (or almost the same results).
   A Batch Render warning is now shown to the user when the position is at the end of the media (Deim
     suggestion
).
   The release in GIT will have a “git tag” added for the “version update” (Mantis BugTracker #288).
6. Bugs/Issues fixed:
    The Compositor “Click2Play” button is now easily accessible again (Mantis BugTracker #BT 237).
    Fixed Render Progress booby (Andrew reported this bug).
    Configure.ac Warn and Guicast Gettid patches (from ferdnyc) were applied (#BT 289 and 290).