Lumiera -- Significant Changes
==============================
Version: 0.pre.05~dev
:Date: 11/2025

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Lumiera is a non-linear video editing and compositing tool.

NOTE: as of 11/2025, Lumiera is in early development stage;
it is not usable yet. This is a preview Release of a
current development snapshot in pre-alpha stage.

Source code and a list of all contributors can be retrieved
from `git://git.lumiera.org/LUMIERA`
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At the current stage of development, the focus is primarily on the
overall integration of fundamental functionality at all levels of
the code base.


Lumiera pre-Alpha Versions
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As of _11/2025_ (0.pre.04)::
This version is again motivated by a series of major upgrades and clean-up.
Compilation now requires C++23 and Debian/Trixie is considered the reference
platform. The GUI is connected to the core over an asynchronous messaging
bus and the timeline display has been reshaped to accommodate flexibly
nested structures of media content, instructed by the session through
a series of _diff messages_. A scheduler has been implemented to drive
the Render Engine, but the connection to the player and UI for output
is yet unfinished.

As of _11/2015_ (0.pre.03)::
A lot of long standing maintenance work has been done.
The codebase has been upgraded to C++14 and Debian/Jessie as reference platform,
followed by clean-up of several workarounds now obsoleted. On the GUI side,
the transition to GTK-3 was accomplished, which however necessitates a rework
of our timeline widget, which is in progress but not finished yet. This work
also spurred an effort to reorder the connection and communication between
the core and the UI, which is expected to be asynchronous. Due to the limited
developer resources, work on the Engine and Player part is stalled.

As of _10/2013_ (0.pre.02)::
The data models have been elaborated and some significant parts of the session
are finished. Work has continued with time handling, a draft of the output
connection framework, a draft of the player subsystem and interfaces to the
engine and processing network. Unfortunately there was a considerable slowdown
and decrease in team size, yet still the code base is growing towards 90k LOC.
No tangible progress regarding the GUI and the backend.

As of _1/2011_ (0.pre.01)::
The project has created and documented a fairly consistent design,
and some parts implemented -- progressing from the technical foundations.
The code base is approaching 65k LOC. Roughly half of this is test code.
The Application can be installed and started to bring up a GTK GUI framework,
but the GUI is rather preliminary and not connected to core functionality.
The video processing pipeline exists only in the blueprints.

As of _2/2008_::
The project has been separated completely from Cinelerra, the parent project.
The Community, which at that time was largely identical to the Cinelerra-CV community,
choose the new project name **Lumiera** through a collaborative selection and vote.
The basic project infrastructure was established, and work on the new codebase
was underway. It is clear that no results other than a test suite can be shown
in the foreseeable future.

As of _7/2007_::
A group of volunteers has formed to address some longstanding issues and limitations
of **Cinelerra**, which we all used for video editing tasks requiring professional quality.
The plan was to restructure some central parts of the render engine: introduce a Builder
for render pipelines and use Placements to control arrangement of clips and a unified
Data-Backend to coordinate usage of system resources. These innovations would serve
as anchor, with the intention to propose the reworked codebase as a new version
of Cinelerra, in the hope of turning Cinelerra development into a more
participatory process going forward.