Monday, November 3, 2014

Meltytech Acquires Copyrights from Ushodaya

Ushodaya Enterprises Limited of India, the original sponsor of the MLT and Melted projects has assigned their copyrights to Daniel R. Dennedy, sole proprietor and CTO of Meltytech, LLC. What does that mean? Not much. There are no planned changes to project direction at this time, but it may provide some options in the future. It is just good to have the copyrights under control of active members of the project to make it possible to exercise future options. Many thanks to project co-founder, BGa, for facilitating this transaction.

Tuesday, October 28, 2014

Synfig Studio uses MLT for cross-platform sound

Synfig Studio is a good, free, open source, cross-platform 2D animation program. They wanted to add audio support, but they needed more than just a hardware abstraction layer for audio output. They needed more than a multi-format/-codec library. They also wanted something that provides timing and mixing with a succinct API. They chose MLT.

Sunday, June 29, 2014

version 0.9.2 released

Thanks to the combined effort of several contributors over the past year, there is a new bugfix and enhancement release 0.9.2 of MLT.


  • Added "boolean" parameter type and "argument" parameter attribute to service metadata schema.
  • Added mlt_properties_frames_to_time().
  • Added mlt_properties_time_to_frames().
  • Changed mlt_events_fire() to return the number of listeners.
  • Added consumer-thread-create and consumer-thread-join events.
  • Added LC_NUMERIC handling for Windows.
  • Added mlt_playlist_mix_out() and mlt_playlist_mix_in().
  • Added mlt_properties_from_utf8().


  • Renamed "qimage" module to "qt".
  • Added support for Qt 5.
  • Added qtext producer, which is now prefered by dynamictext filter over pango.
  • Added xml-nogl consumer.
  • Consolidated dgraft, burningtv, and rotoscoping into new plusgpl module.
  • Added vid.stab module with vidstab and deshake filters. This depends on external vid.stab library unlike its predecessors.
  • Rewrote opengl module.
  • Added loudness filter based on EBU R128.
  • Added rgblut filter to plus module.
  • Added luma-only liftgammagain filter to plusgpl module.
  • Added lift_gamma_gain filter to plus module.
  • Added support new keyframable animated properties to brightness, volume, panner, boxblur, wave, sepia, charcoal, burn, gamma, grain, dust, lines, tcolor, oldfilm.
  • Added movit.luma transition to opengl module.
  • Added cbrts consumer to plusgpl module.
  • Removed the "ppm" PPM-pipe producer.
  • Added more VITC functionality to decklink module.
  • Added matte transition to core module.


  • Deprecate videostab module with videostab and videostab filters. This will not be removed soon in order to keep old scripts and projects functional.
  • Deprecate the dv (libdv), kino, and vorbis modules. These are scheduled to be removed in next release.

Tuesday, February 11, 2014

New video stabilization and EBU R128 loudness filters

There are a few new filters in MLT git. The "videostab" filter is a new version based vid.stab replacing the old videostab2 filter. Because it uses an externally compiled version of vid.stab, you can use the latest and greatest version of vid.stab, which is not only faster but gives better quality results. In addition, while vidstab is a dual pass filter - first pass generates a .stab file, second pass reads it - there is a new single-pass "deshake" video filter that uses vid.stab's single-pass mode. It will not give as good results as dual pass, but it is handy for realtime/live applications. Thanks go to Jakub Ksiezniak, a new MLT contributor, and Brian Matherly for helping to get it into shape for merging.
Also, Brian contributed a new audio filter named "loudness" that uses libebur128 to provide better audio normalization because EBU R128 is based on perceived loudness and newer research than traditional RMS- and peak-based approaches.