https://bugs.kde.org/show_bug.cgi?id=406515
Bug ID: 406515
Summary: Installation or update from PPA fails in Ubuntu 18.04
- libmlt++3 and libmlt6 are too old in
ppa:kdenlive/kdenlive-stable repository
Product: kdenlive
Version: 18.12.3
Platform: Other
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: Installation
Assignee: vpi...@kde.org
Reporter: kxk-ocumoatbugs...@lugosys.com
Target Milestone: ---
SUMMARY
This is almost a re-edition of bug #400264, but neither a re-opening nor a
duplicate. This one can be easily avoided with a simple correction to the
documentation and fixed with a simple step (see below). The first most
important part is the "how to avoid" this problem from keep reappearing. The
second important thing is how to fix it, see Additional Information below.
Issue:
In Ubuntu 18.04 is not possible to install (or update to) kdenlive
18.12.3+git201902280143~ubuntu18.04.1 using the official
ppa:kdenlive/kdenlive-stable, because required libraries libmlt++3 and libmlt6
in that PPA are too old.
STEPS TO REPRODUCE
1. In ubuntu 18.04, install -if never done before- the Kdenlive official
ppa:kdenlive/kdenlive-stable, then sudo apt update.
2. sudo apt install kdenlive # OR sudo apt install --reinstall kdenlive if
existing installation of previous version.
OBSERVED RESULT
Error is returned:
The following packages have unmet dependencies:
kdenlive : Depends: libmlt++3 (>= 6.13.0+git201903302059~ubuntu18.04.1) but
6.10.0+git201810170323~ubuntu18.04.1 is to be installed
Depends: libmlt6 (>= 6.13.0+git201903302059~ubuntu18.04.1) but
6.10.0+git201810170323~ubuntu18.04.1 is to be installed
E: Unable to correct problems, you have held broken packages.
EXPECTED RESULT: Successful installation/upgrade, no error messages.
ADDITIONAL INFORMATION
1) First, the _second_ most important thing: how an user can fix this problem
(officially). If you have this issue, please add one more PPA with this
command:
sudo add-apt-repository ppa:kdenlive/mlt && sudo apt update
With the official mlt PPA, now you should have access to the up-to-date
libraries that are missing in ppa:kdenlive/kdenlive-stable, so you should now
be able to install or upgrade kdenlive to
18.12.3+git201902280143~ubuntu18.04.1.
2) Finally, the most important thing: How to avoid this issue from hitting less
experienced users. This is a job for the Kdenlive team, and it is very simple.
Dear Kdenlive Team:
Please, can you fix the instructions in the https://kdenlive.org/en/download/
web page, section
"GNU/Linux Packages -> Ubuntu | LinuxMint | Elementary"
Currently, and since a couple of years already, it states:
"It is recommended to download the AppImage version until the release of Ubuntu
18.04."
That sentence has at least two problems:
First, it is obsolete because Ubuntu 18.04 has been released since... well,
2018-04. This could be understood as "at this point in time it is OK to use
ppa:kdenlive/kdenlive-stable". But...
Second: It IS actually OK to use that PPA. But unless you are a magician and
guess that there is hidden secret to it in
https://community.kde.org/Kdenlive/Development#Pre-requisites_and_Supported_Platforms,
you are in for a ride that could bring you to read this bug report or perhaps
to write another one similar to it.
SOLUTION:
The solution is very simple: Fix the Kdenlive website, by remove
misleading/obsolete information about Kdenlive installation and replace it with
a pointer to a SINGLE, up-to-date source of information. Sounds complicated,
but it is not. I suggest this:
Please replace the above mentioned incorrect/misleading sentence in
https://kdenlive.org/en/download/ web page, section "GNU/Linux Packages ->
Ubuntu | LinuxMint | Elementary"
and replace it with something like this:
"It is recommended to download the AppImage version. If you prefer the
convenience of our PPA, please refer to these instructions:
https://community.kde.org/Kdenlive/Development#Pre-requisites_and_Supported_Platforms.";
Voilá !
You get the idea. Make that obscure link much more visible (why don't you give
it a better, more explicit title/subtitle about "Installing via PPA"?) and do
not write contradictory/easy to expire/duplicated information elsewhere, just
links to the only place which is correct and updated.
Something like that should free you from having to maintain more than one place
with download/installation instructions. So far, you have at least two bug
reports (from my self) on this issue, plus many unnecessary complaints and
discussions.
This is a Documentation problem that generates Installation problems, and the
impact on Installation is bigger and exactly what the user will perceive and
rant about in the first place. That's why I filed an Installation bug, although
this might generate philosophical argumentation (please don't).
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