IgorB:

I have installed the new
"cinelerra-5.1-ub16.04-20190430.x86_64-static.txz" release in another
AMD desktop PC with UbuntuStudio_16.04_LTS.
When I run ./cin by terminal an error "libva.so.1 ..." appear.
I read the "releasenotes.pdf" about, and I understand I have to install
the libva-dev and libvdpau-dev.
Unfortunately that desktop PC is off-line, so I ask you if there is a
easy way (workaround) to bypass the problem to use the new Cin release.

GG and I discussed this this morning.  Originally we had considered carrying the libva and libvdpau as another thirdparty library, similar to libmpeg3 but it is too much and very impractical.  There also is no easy way to build Cinelerra without the 2 linked in. The best we could come up with was in:

  https://askubuntu.com/questions/974/how-can-i-install-software-or-packages-without-internet-offline

with the section I took out of that below.  It may be old; it may not work; but here it is anyway.  If absolutely necessary, because we want you to be able to continue to work offline, is for GG to make a special build or provide some kind of tar file for you to move over via USB and install that.  Let us know if this helps.  gg/phyllis

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You can use apt-offline or apt-offline-gui.
Pre-requistes: A friend's system with Internet connection. apt-offline installed in both your systems.

The Offline installation is achieved in 3 simple steps.

Step 1:
Generate a signature file on the Disconnected Debian box at home
apt-offline set /tmp/apt-offline.sig
The above command will generate all information required from apt about updating its database.

Step 2:
Download data based on the signature file generated earlier
apt-offline get C:\apt-offline.sig --threads 5
The above command will download data as mentioned in the signature file. To speed up downloads (that can be from multiple apt repositories), in this example we spawn 5 download threads.
Once completed, you could just copy the data (an archive file, if you used the --bundle option) back to the removable medium and copy it back onto your offline host.

Step 3:
Once you're back upon the home Debian machine, you feed the data from the removable medium to apt-offline:
apt-offline install /media/USB/apt-offline.zip
This will update the APT database on your disconnected machine seamlessly.

Apt-offline can be even used in Windows systems. In my opinion, apt-offline is the best option for Offline installation.