https://bugs.kde.org/show_bug.cgi?id=369659
Bug ID: 369659
Summary: kdenlive does not use ffmpeg if first started without
ffmpeg being installed
Product: kdenlive
Version: 16.08.1
Platform: Archlinux Packages
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: samuel+kde....@dionne-riel.com
It seems kdenlive does not have an appropriate fallback when ffmpeg is not
installed at first run. The setting key `ffmpegpath` does not seem to resolve
to an installed ffmpeg instance even after a full close and start of the
application.
This is present in (at least) the extract zone job.
- src/project/jobs/proxyclipjob.cpp
Reproducible: Always
Steps to Reproduce:
(Reproducibility: tricky to reproduce)
These steps assumes the developer does not want to remove ffmpeg to test, it
gives out the same result, but it has not been verified that it is the same
actual issue.
0. Remove the ffpmeg key from your ~/.config/kdenliverc file. Removing it from
the settings panel *does not have the same effect*.
1. Add a clip
2. Select an in and out point (optional?)
3. Right click the preview and select Extract Zone
4. Accept the options
5. Observe the warning label in the Project Bin (Failed to create file.)
6. Observe the stdout(err?) warning. (QIODevice::read (QProcess): device not
open)
Actual Results:
The process could not be started.
Expected Results:
Kdenlive should
A. When ffmpeg is not executable:
1. inform the user that ffmpeg could not be found, or try some known sane
defaults (/usr/bin/env ffmpeg ?)
B. The error output should be made available to the user, but not necessarily
all shown by default.
Everytime:
1. Print the whole command line it tried to execute from QProcess,
2. if the executable process is an empty string (not verified), print some kind
of warning? Use some kind of default?
The severity is kind of "Minor", but actually "Grave" for a user, even a power
user, since the error is actually opaque, and the dependency is actually
present.
(This was reported on behalf of another user, but verified and reproduced by
me.)
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