Update: We have released a second release candidate. This fixes several bugs users have posted on the issue tracker.
The first release candidate for Video v0.2 has been released! You can install it from the command line with:
raco pkg install video-testing
As before, the
video Racket package points to the latest stable version (v0.1 when writing this post), so use
video-testing to download the RC.
You can report any bugs you find here: https://github.com/videolang/video/issues
Here is a list of the major changes from the last beta:
- Update Video to use a version of libvid that does not segfault.
- More precise dependencies in Video’s info file.
- If FF_LOG=stdout, then do no redirection of ffmpeg’s logging.
- More complete render parameterization.
- Cleaner error messages.
- Fixed bug preventing Video from rendering audio-only files.
- Pause feature no longer additionally stops the video.
- Improved audio/video syncing in live preview.
- Fixed bugs in front half of Video compiler.
- Made ‘canvas’ an optional parameter
Video was the topic of Bob Konferenz’s 2018 keynote. You can find a recording of the on the conference page, or below. The talks begins with the same introduction as the one I gave at RacketCon 2017, but goes into more detail on the tower of languages that Video is made of.
I recently had several students ask me to show them how to make DrRacket plugins for their new language. It is easy to do, but I noticed that there aren any existing guides on how to do it. There is the plugin documentation, which is a good reference and has some good examples. Unfortunately, it lacks a good step by step tutorial on how to make new IDE plugins. This post is that tutorial.
DrRacket plugins fall into one of two main categories:
- Language-Specific Plugins
- Global Plugins
The former only enables the plugin when the user is editing a file in that plugin’s associated language. The latter, however, is for plugins that should always be enabled, such as DrRacket’s Vim Mode. This tutorial covers both plugin styles.
I recently gave a talk about Video at RacketCon 2017. The Video goes over the basics of the language’s API and gives some incites on the tower of DSLs Video runs on. If you haven’t watched the Video yet you can find it below.
Today we are announcing the first stable beta for Video. To install it, you can first install Racket, and then run:
raco pkg install video-testing
Alternatively, within DrRacket, go to
File -> Install Package, and type in
Either way, make sure you installed
video package points to the latest stable build of Video, which is v0.1.1 at the time of this release.
The documentation for this version can be viewed on the Racket documentation website. Unlike with the Alpha builds, the documentation has been updated to reflect the new version. As such:
Video v0.2-beta is now mature enough for programmers to reliably use it without segfaults.
The above sentence is significant because it means Video is now one of the most stable open source video production tools available.
Update2 A third alpha is released. This should be the last alpha build. The next release will be a beta. You can download the build here.
Update: A second alpha release has been created. This fixes some bugs preventing Video from working on Windows and Linux. Video has now been tested on all three platforms. You can download the build here.
This is an alpha version of Video v0.2. The main update here is dropping MLT as a dependency, and bundling FFmpeg for Windows and Mac builds. As such, Video can be used out of the box on now, without the need to hunt down the more obscure MLT library separately. Linux machines must still download the correct version of FFmpeg themselves. However, this is much easier to do.
Specifically, FFmpeg 3.2 is recommended, but the following specific library versions are also usable:
- libavcodec v57
- libavformat v57
- libavutil v55
- libswscale v4
- libswresample v2
- libavfilter v6
Again, these are included for the mac/windows builds, and are all part of an FFmpeg 3.x installation.
Some notes about why this is still alpha:
- The video preview currently does not work. People needing access to this feature need to use v0.1.1.
- Video has not been thoroughly tested
Once the first one has been addressed we can move to beta, and once both have been addressed we can move to rc.
You can download the release here.
Please report any issues you find on the bug tracker. (If you don’t have a github account you can also use this anonymous form.
Welcome to the Video Blog. This blog is for Video release announcements, status updates, tutorials, and anything relevant to Video and video editing in general.