j-b-m's blog

News from Randa, Café and next release


We will have our monthly Kdenlive Café today, 5th of july at 9pm CEST (UTC+02), so feel free to join us on irc, #kdenlive channel. We will mostly discuss our plans for the upcoming 16.08 release which is coming soon!


The latest developments include a welcome cleanup of the Kdenlive's Wizard, this annoying dialog that popped up on the first start of Kdenlive. It will now appear only if a configuration problem is detected. So instead of forcing the first time user to choose several complicated options, Kdenlive now starts up picking the best default options (including NTSC/PAL framerate depending on your region). So I finally implemented this idea that was first mentionned by the VDG in Randa 2015!

Speaking of Randa Meetings...

Randa 2016 was the occasion to meet Joseph who is currently working on the Kdenlive Windows port. The Windows port involves a lot of configuration fine-tuning and lengthy compilations, but is steadily progressing and we hope to have the first Kdenlive Windows built in the next days. Keep in mind that this will be an experimental version, and to have it really working will probably require a long term effort but still this is exciting!

The path to Windows is also a good opportunity to do some cleanup and improve Kdenlive on Linux in non KDE environments. On my side, I fixed several stability issues related to timeline refactoring, and also worked on icons to improve the user experience when using Kdenlive on non KDE Linux Desktops.

This was also the occasion to exchange with other developers about the recent packaging formats developments, since a major issue for us is to deliver a recent Kdenlive version with updated libraries to the end user.

Joseph, Grace and me in Randa during the afternoon trip

If you want to support us, please donate to help us keeping up these developer meetings!

Kdenlive in Randa

On Thursday evening, I will join the Randa Meeting, which gathers around 40 KDE developers. This will allow me to spend some dedicated time on Kdenlive and exchange with the development community. I hope to spend some time with Joseph Joshua who is working on Kdenlive's Windows port and it will also be a great occasion to look into Flatpak, a Linux cross distro packaging system.

I will keep you updated when I will be there!

If you want to support us, please donate to help us keeping up these developer meetings!

Kdenlive Café and News

Next Kdenlive Café Tomorrow

Our next monthly IRC meeting will be this thursday, the 9th of june at 9pm, Central European Timezone (UTC+1). Feel free to join us on irc.freenode.net, channel #kdenlive.

Kdenlive development news

In the last weeks, we worked to improve the timeline preview (pre-rendering) feature, and added a few UI improvements, like a progress bar in the Render button, see screenshot.

We also started implementing a cached data manager. Kdenlive as a video editor can produce large amounts of temporary data. Until now, all these temporary files were saved in $HOME/kdenlive. We are now switching to an XDG compliant scheme, and try to give users more infos about how much data is stored, and allow for easy mangement.

Feel free to join us for the next Café!

Kdenlive: features and next Cafés

Our monthly Kdenlive Cafés (*) really helped us focusing the development on some awesome features. We now have a small team of really involved people that help us evolve towards the best free open source video editor for professionnals.

We have opened the poll for our next Café date selection, so if you want to meet us, add yourself to the list: https://dudle.inf.tu-dresden.de/Kdenlivecafe7and8/

And to give you an idea of what we do these days, here is a video of the last feature added in git master: timeline preview.

Sometimes, you just have too much effects or transitions in your timeline to be able to play it in realtime (you can see on the video, it can only play 13 frames per seconds). This is where this new feature helps you: it pre-renders parts of the timeline so that they can be played in realtime. And you can continue working on other parts of the timeline while Kdenlive is working in the background for you.

More exciting news will come in the next months, so stay tuned and join us for the café!

(*) Kdenlive café is a two hour informal meetings on irc.freenode.net in channel #kdenlive

Kdenlive news

Next Kdenlive Café

Our next monthly IRC meeting will be this wednesday, 11th of May at 9.00pm (CET).
Feel free to join us on irc.freenode.net, channel #kdenlive.


Kdenlive 16.04.1 should be released tomorrow with several bugfixes.
MLT (the video framework behind Kdenlive) version 6.2.0 was also released recently, and we urge packagers to update to this new version since it fixes the longstanding titler crash issue in Kdenlive. This new MLT version also adds support for FFmpeg's libavfilter, which means that in the near future, Kdenlive should be able to use some of FFmpeg's filters.


Development on the master branch (which will become Kdenlive 16.08) continues, and we just finished implementing several editing improvements, enabling a much faster keyboard workflow. Native support for Krita images was also added.

Snapshot of the current development version

A rather busy month as you can see, and we hope to continue expanding the great community around Kdenlive, so feel free to join us on wednesday for the café!

Kdenlive: Café, release and development

In a few days, we are going to celebrate the release of Kdenlive 16.04.0.
If you are interested in the project, you are welcome to join us in the next Kdenlive café, a monthly IRC meeting for users and developers.

Next café will be this wednesday, the 20th of April at 09:00pm (CET time), on irc.freenode.net in channel #kdenlive.

*Ubuntu users can test our latest versions (stable 15.x, testing 16.04 and git master ) in our official PPA: https://launchpad.net/~kdenlive

Also as a note to packagers, an important fix for a crash in the titler was recently committed to MLT's git master. A new version of MLT should be out in the next days.

Feature development continues as well, and an new OpenCV based Motion Tracker filter is currently being developed for a later release. Sample video below for some fun.

Extract from a video by Jeffrey Beach, Beachfront Productions (CC BY 3.0)

Enjoy and hope to meet you on wednesday for the café.

Jean-Baptiste Mardelle

Next Kdenlive cafés

After our successful 4th edition of the Kdenlive café(*), we are preparing the next 2 meetings.
If you are interested to join us to discuss the future of Kdenlive, you are welcome.
Dates and times will be chosen this sunday, so add yourself to the date selection tool to get a chance to meet us: https://dudle.inf.tu-dresden.de/Kdenlivecafe5and6/

Kdenlive 16.04 titler improvements : shadow, line and letter spacing, gradients.

(*) Kdenlive café is a two hour informal meetings on irc.freenode.net in channel #kdenlive

Hope to meet you there, your Kdenlive team!

Kdenlive - preparing for the april release

We have been working hard over the last 4 months to prepare Kdenlive 16.04, that will be released with KDE Applications around the 20th of april. This release will brings many stability and usability improvements as well as dozens of new features. We are now entering feature freeze and will concentrate on fixing as many bugs as possible for the release.

New features in this release include:

  • Audio level meter integrated in monitor
  • Split view to compare an effect in timeline against original clip
  • Increase/decrease speed of a clip now also affects its audio
  • New Library feature allowing you to copy / paste sequences between projects
  • Improved titler allowing gradients and shadows

We will try to post some details soon about how to install the latest development version for those of you who want to help us test, debug and prepare this new version.

Meet us

This post is also an occasion to remind you that we will hold our 4th Kdenlive Café on IRC this friday, the 25th of March 2016 at 11am (CET time).

This will be another occasion for developers and users to meet, on freenode.net #kdenlive channel.

We hope to meet some of you on that occasion!

Kdenlive's sprint report

Last week-end, Vincent and me met in Lausanne for a Kdenlive sprint. One of our goal was to merge Gurjot Singh Bhatti's GSoC work on curves for keyframes. This was more work than expected and we spent many hours trying fix the curves and make keyframes behave correctly. Not much time was left for sleep, but we still managed to get outside to make a group (!) picture in the woods above Lausanne.

The code is working and in git master but cannot be used yet - we want to make sure older projects convert properly to the new keyframe system before enabling it - hopefully in less than a week. Below is a small demo of the feature:

Currently, only 1 dimension parameters are supported, but we hope to extend this to the transitions for the 16.04 release, allowing to move and resize the video using smooth interpolation instead of the current linear way.

During our meeting, we also discussed several UI changes that were initiated at Randa 2015, and hope to make some progress on that for the april release.

Next friday, the 12th of february (at 11am CET time), the 3rd Kdenlive café will be an occasion to discuss and exchange about Kdenlive's developments and community.

Kdenlive: Café, Sprint and More

So following our poll, the next Kdenlive Café will happen on the following days:

Kdenlive Café #3: Friday, 12th of February, 11am (CET time)
Kdenlive Café #4: Friday, 25th of March, 11am (CET time)

This will be another occasion for developers and users to meet, on freenode.net #kdenlive channel.
The other Kdenlive events are a Kdenlive coding sprint this week-end in Lausanne (Switzerland) where our small team will amongst other challenges try to merge the "curves in keyframes" feature.

And for the pleasure, here is a screenshot of Kdenlive's clip monitor where you can see several of the new features that are currently being worked on for the 16.04 release. The monitor looks a bit cluttered like this but it's just for the demo - everything is configurable.

You can see here:

  • New audio meter widget
  • Overlay of audio waveform at the bottom of the screen
  • Safe zone
  • On monitor toolbar allowing to zoom, switch fullscreen, seek to next marker, etc

More news will come this week-end from our coding sprint!


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