Unable to load jpegs created in gimp.

[3d420]

Found it.

[eumagga0x2a]

I see, the colon after the directory name was confusing. Good that you've sorted this out.

[3d420]

** ALL DONE **
** The installable packages are in the debs folder **
ogf@freekbox:~/avidemux2$

[eumagga0x2a]

Good, you've successfully built a 32bit Avidemux 
Now please install the .debs by running

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cd ~/avidemux2/debs && sudo dpkg -i *.deb

[3d420]

cd ~/avidemux2/debs && sudo dpkg -i *.deb
[sudo] password for ogf:
Selecting previously unselected package avidemux3-cli-dev.
(Reading database ... 180930 files and directories currently installed.)
Preparing to unpack avidemux3-cli-2.6.15-161125-dev.deb ...
Unpacking avidemux3-cli-dev (2.6.15-161125) ...
Selecting previously unselected package avidemux3-cli-runtime.
Preparing to unpack avidemux3-cli-2.6.15-161125-runtime.deb ...
Unpacking avidemux3-cli-runtime (2.6.15-161125) ...
Selecting previously unselected package avidemux3-core-dev.
Preparing to unpack avidemux3-core-2.6.15-161125-dev.deb ...
Unpacking avidemux3-core-dev (2.6.15-161125) ...
Selecting previously unselected package avidemux3-core-runtime.
Preparing to unpack avidemux3-core-2.6.15-161125-runtime.deb ...
Unpacking avidemux3-core-runtime (2.6.15-161125) ...
Selecting previously unselected package avidemux3-plugins-cli-plugins.
Preparing to unpack avidemux3-plugins-CLI-2.6.15-161125-plugins.deb ...
Unpacking avidemux3-plugins-cli-plugins (2.6.15-161125) ...
Selecting previously unselected package avidemux3-plugins-common-plugins.
Preparing to unpack avidemux3-plugins-COMMON-2.6.15-161125-plugins.deb ...
Unpacking avidemux3-plugins-common-plugins (2.6.15-161125) ...
Selecting previously unselected package avidemux3-plugins-qt5-plugins.
Preparing to unpack avidemux3-plugins-qt5-2.6.15-161125-plugins.deb ...
Unpacking avidemux3-plugins-qt5-plugins (2.6.15-161125) ...
Selecting previously unselected package avidemux3-qt5-dev.
Preparing to unpack avidemux3-qt5-2.6.15-161125-dev.deb ...
Unpacking avidemux3-qt5-dev (2.6.15-161125) ...
Selecting previously unselected package avidemux3-qt5-runtime.
Preparing to unpack avidemux3-qt5-2.6.15-161125-runtime.deb ...
Unpacking avidemux3-qt5-runtime (2.6.15-161125) ...
Selecting previously unselected package avidemux3-settings-settings.
Preparing to unpack avidemux3-settings-2.6.15-161125-settings.deb ...
Unpacking avidemux3-settings-settings (2.6.15-161125) ...
Setting up avidemux3-core-dev (2.6.15-161125) ...
Setting up avidemux3-core-runtime (2.6.15-161125) ...
Setting up avidemux3-plugins-cli-plugins (2.6.15-161125) ...
Setting up avidemux3-plugins-common-plugins (2.6.15-161125) ...
Setting up avidemux3-plugins-qt5-plugins (2.6.15-161125) ...
Setting up avidemux3-qt5-dev (2.6.15-161125) ...
Setting up avidemux3-qt5-runtime (2.6.15-161125) ...
Setting up avidemux3-settings-settings (2.6.15-161125) ...
Setting up avidemux3-cli-dev (2.6.15-161125) ...
Setting up avidemux3-cli-runtime (2.6.15-161125) ...
ogf@freekbox:~/avidemux2/debs$

[eumagga0x2a]

Now please run

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sudo ldconfig

as a precaution, then you should be able to start Avidemux with

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avidemux3_qt5

[3d420]

SUCCESS!
It opens the jpegs now.
Will I have to open it from the terminal every time? Or will it appear in my menu?

[eumagga0x2a]

You can make an avidemux.desktop file (an application starter) like

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[Desktop Entry]
Name=Avidemux Video Editor (Qt5)
Comment=Graphical video editing tool - Qt5 interface
Icon=totem
Exec=/usr/bin/avidemux3_qt5
MimeType=video/mpeg;video/quicktime;video/x-msvideo;video/x-anim;audio/x-mp3;audio/x-mp2;
Terminal=false
Type=Application
Categories=AudioVideo;AudioVideoEditing;
X-Desktop-File-Install-Version=0.23
StartupWMClass=avidemux3_qt5

and put it into ~/.local/share/applications (instead of "totem" you can choose another icon of your liking).

[3d420]

Lol. You lost me again.
Where do I find '~/.local/share/applications'?

[Jan Gruuthuse]

Is a hidden folder. In the file manager menu: View -> click on Show hidden files. It should now have a v in front of Show hidden files.

OR

In the addressbar copy paste this:

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/home/ogf/.local/share/applications this should you bring in the wanted folder.

btw folks nice work, beyond my knowledge.

[eumagga0x2a]

In the addressbar copy paste this:

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/home/ogf/.local/share/applications this should you bring in the wanted folder.

Entering

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~/.local/share/applications

into the location bar in a filemanager works just as well, "~" gets expanded to the value of $HOME environmental variable.

#####################

3d420, might I ask you a favour? If you have not yet deleted the avidemux2 folder in your home directory, could you please test if

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cd ~/avidemux2
rm -r build* install
bash bootStrap.bash

still results in a successful build? The reason I ask you this is that we didn't check if omitting a global export of LDFLAGS still allows the build to succeed.

[3d420]

3d420, might I ask you a favour? If you have not yet deleted the avidemux2 folder in your home directory, could you please test if

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cd ~/avidemux2
rm -r build* install
bash bootStrap.bash

still results in a successful build? The reason I ask you this is that we didn't check if omitting a global export of LDFLAGS still allows the build to succeed.

Sorry I didn't have time today. I can run a test build for you on Monday if you still want it.

[eumagga0x2a]

Thank you, but there is no need to run a test build anymore: I've setup 32 bit versions of (L)ubuntu 16.04 and 14.04.5 in gnome-boxes to be able to test everything myself (which turned out to be very helpful, immediately catching two stupid errors in my changes ).