Wednesday, April 20, 2016

Version 6.2.0 Released

You can download it from SourceForge or GitHub. The major announcement is the introduction of support for libavfilter! This is still a work-in-progress. It is limited to FFmpeg 2.3 and up, and there are a number of filters that are black-listed because they are known to not integrate with MLT, which is not a full libav* environment or simple wrapper for it. There are likey avfilters that are not yet black-listed but might not work because they have not been completely tested. Also, they do not support MLT's keyframable property animation nor its frame-threaded parallelism due to architectural or integration limitations. However, some avfilters are slice-threaded (internal parallelism), and that works. Finally, libavfilter filtergraph syntax is not supported either.

All of the supported libavfilters are exposed as MLT filters beginning with the prefix "avfilter." All of the avfilter parameters are exposed as MLT properties with the "av." prefix to prevent clashes with MLT properties. You can run
melt -query filters to see the new avfilters, and
melt -query filter=avfilter.rotate, for example, to view generated documentation for an individual filter.

Here is a list of notable fixes and enhancements in this release:
  • Added support for libavfilter to avformat module.
  • Added auto-rotate support to avformat producer.
  • Added animated GIF preset for avformat consumer.
  • Prevent serializing and deserializing mlt_type property to xml module.
  • Fixed relative paths for WebVfx "plain:" resources in xml module.
  • Updated libebur128 to v1.1.0 in plus module.
  • Added dynamic_loudness filter to plus module.
  • Added loudness_meter filter to plus module.
  • Qt 5 fixes for kdenlivetitle producer.
  • Added gradients and text shadows to kdenlivetitle producer.
  • Added support for building rtaudio against external build of lib.
  • Upgraded bundled RtAudio to v4.1.2.
  • Added status parameters to ladspa producer and filters.
  • Added 5.1 surround to stereo downmix to audiochannels filter in core module.
  • Fixed compiling SWIG bindings for Ruby 2.0.

Wednesday, February 17, 2016

Version 6.0.0 Released

This is a bugfix and minor enhancement release. Note that our release versioning scheme has changed. We were approaching 1.0 but decided to synchronize release version with the C library ABI version, which is currently at v6. You can download it from SourceForge or GitHub. Here are some of the notable changes and enhancements:

Framework

  • Added unit tests for tractor, multitrack, and field.
  • Deprecate mlt_frame_get_alpha_mask().
  • Added drop_count readable property to mlt_consumer.
  • Added mlt_factory_repository().
  • Added mlt_properties_to_utf8().
  • Define MIN, MAX, CLAMP in mlt_types.h in not already defined.
  • Switched to __APPLE__ and _WIN32 defines throughout codebase.

Modules

  • Added UDP and SMPTE 2022-2 support to cbrts consumer.
  • Fixed build against latest FFmpeg versions - now requires v1.1 and up.
  • Added audiospectrum filter to qt module.
  • Added meta.media.0.codec.rotate property to avformat producer to let apps and other services get the media orientation.
  • Make the avformat producer handle animated images.
  • Added style property to dynamictext filter.
  • Added timewarp producer to core module.
  • Fixed slowly accumulating A/V sync drift in mix audio transition.
  • Added width_crop and width_fit properties to pango producer.

Melt
  • Added -abort option to simply exit without full cleanup.
  • Fix key-press handling on Windows.