MediaConch Newsletter #3 (January 2016)


New Release

What’s new in MediaConch 15.12?

  • Database support introduced

With an introduction of a database built into the GUI, the most noticeable improvement is speed. Instead of parsing a file every time it is analyzed, it will only be parsed once, with subsequent policies then applied to the pre-analyzed content. Having a database will, in the future, allow users to apply custom policies to the full library content without having to wait a long time. This will also allow for the generation of custom statistics based on collections instead of just individual files. For example, if a percentage of the parsed library has “Error X,” it will be easier to gather similar files and determine which writing library was producing the error. This is one of many ideas other developers could implement with so much data available in the database.

  • New logo

MediaConch finally has its own logo, never to be confused with MediaInfo again! More details about the logo can be found in this blog post about the design.

  • More explicit licences

MediaConch and MediaInfo library are licensed as GPLv3+ and MPLv2+, as stated in the software. Additionally, a list of third party libraries and their licences are available on our Github readme page.

  • Implementation test improvements

Implementation tests now load logic from an XML representation of the Matroska EBML Schema. The XML tests on valid parent elements, element multiplicity, and mandated child elements, among other things.

  • EBML

As part of our goal to standardize and clarify the formats, Matroska/EBML draft specifications are being regularly updated. These changes are reflected in MediaConch 15.12.

  • Other bug resolutions

Support for negative timecodes in Matroska files

Better support of non-English filenames

Display format is now also applied on invalid files

MediaTrace now documents the parser used for raw streams within Matroska.

MediaConch releases updated software on a monthly basis. Nightly builds are also available for testing the most recent development.



For Mac users, MediaConchCLI can now be downloaded via Homebrew. brew install mediaconch will install the latest version of the software. Moving forward, brew upgrade mediaconch will upgrade the package to the latest release.


Artefactual Collaboration

MediaConch will be working with the Artefactual team to integrate into their Archivematica software during the upcoming year. Artefactual will provide testing and feedback on software tools being developed by MediaArea as part of the PreForma project. Artefactual will also integrate select MediaConch tools into Archivematica and provide associated documentation and support for those features.



Ongoing work towards the standardization of Matroska and FFV1 can be followed via the recently-founded IETF working group, CELLAR (Codec Encoding for LossLess Archiving and Realtime transmission).

More information on CELLAR and opportunities to join in the discussion via mailing list are available on their website:



Project lead Jérôme Martinez will be presenting on our work at the upcoming FOSDEM conference in Brussels (30-31 January, 2016). FOSDEM is a conference held annually for open source software developers. The title of his talk is “CELLAR, Status report on an IETF Working Group for Matroska, FFV1, and FLAC.”

Conference website:

Event page:


Past and future events

In case you missed it, MediaConch was represented at the Association of Moving Image Archivists in Portland (20 November) and Fédération Internationale des Archives de Télévision / The International Federation of Television Archives (FIAT/IFTA) World Conference in Vienna (8 October). If you weren’t able to make it, we covered the events on our blog.



MediaConch will be holding a webinar in January or February. More details to come soon.

Team member Ashley Blewer will be speaking at Code4lib (7-10 March, Philadelphia, PA, USA) about community-driven audiovisual archiving microservices, including MediaConch development. Project lead Dave Rice will also be attending.

MediaConch will be presenting at the PREFORMA Open Source Preservation Workshop in Stockholm on 7 April, 2016 at the National Library of Sweden. Registration is free and open until 31 March:

In July, MediaConch will be attending the IETF conference held in Berlin (17-22 July) and plans to hold an open source workshop for MediaConch users at that time.



MediaArea is eager to build a community of collaborators and testers to participate in and use the results of the project. You can contact us here for more information.



The MediaConch Team

Follow us on Twitter: @MediaConch


Visit the PREFORMA Blog

Visit the PREFORMA Website

Leave a Reply

Related Articles

MediaConch Newsletter #8 - Oct. 2016
What’s new in MediaConch 16.09, the latest release of the conformance checker for audiovisual files now available to download on the PREFORMA Open Source Portal, the next appointments where you can meet team (among which IPRES 2016 and the PREFORMA Experience Workshop in Berlin) and much more on this October release of the MediaConch newsletter.
Learn more about the conformance checkers
The PREFORMA project is running a webinar series throughout September to present the three conformance checkers that are being developed for electronic documents, still images and audiovisual files. The webinars will: introduce the PREFORMA project, update participants on the current status of the conformance checkers, demonstrate the software, outline future plans, and give examples of how the community can contribute, or provide feedback.
MediaConch Newsletter #5 - June 2016
What’s new in MediaConch 16.05, PREFORMA's conformance checker for AV files, latest downloads, upcoming events and much more in the June 2016 edition of MediaConch newsletter. Register to the No Time to Wait! symposium on the standardization & use of FFV1 & Matroska in archives. Download MediaConch from PREFORMA Open Source Portal, try it and send us your feedback. We will use it to improve the software.
MediaConch Newsletter #4 - April 2016
MediaArea Team released version 16.03 of MediaConch, the open source conformance checker for audiovisual files. Among the latest updates, it now supports plugins including VeraPDF and DPFManager, the other two PREFORMA conformance checkers for electronic documents and still images. The Online MediaConch GUI enables accessibility across platforms.