v7.36.0 released

Dec 29, 2025

You can download it from GitHub.

This version adds image processing in linear color on the CPU (previously only Movit). Plus, it extends 10-bit video processing on the CPU to many more services.

Framework

  • Added mlt_image_default_colorspace()
  • Added mlt_image_default_trc()
  • Added mlt_image_default_primaries()
  • Added mlt_color_convert_trc()
  • Added the mlt_consumer property mlt_color_trc to drive a new color_transform normalizer filter. This sets the color transfer function to use for image/video effects. It is beneficial and correct to use linear color for any pixel mixing whether for blending or interpolation.
  • Removed atexit(mlt_factory_close) in mlt_factory_init(). Close the factory yourself if you feel the need to (not generally needed when exiting a process).
  • Prevent possible crash in mlt_service_connect_producer().
  • Added mlt_profile_is_valid() and Mlt::Profile::is_valid().
  • Fixed crash on invalid profile (CVE-2025-65834) in:
    • mlt_consumer_start()
    • mlt_factory_producer()
    • xml producer

Modules

  • Drop support for Qt 5.
  • Fixed bad color in luma transition’s dissolve (regression in v7.34.0).
  • Fixed HLG HDR broken in decklink consumer (regression in v7.34.0).
  • Fixed warnings when flushing audio in the avformat consumer.
  • Added support for hwaccel=vulkan to the avformat producer.
  • Added a color_transform normalizer filter to the core module to convert all image/video producers to and from linear color. It is abstract in the core module and drives the following filters:
    • avfilter.zscale
    • sws_colortransform
    • avfilter.scale
  • Added filter sws_colortransform that is more efficient than avfilter.swscale but requires FFmpeg 8.
  • Changed the default property values of the null consumer:
    • real_time: -1
    • terminate_on_pause: 1
  • Changed the luma and movit.luma transitions to progress linearly with linear color_trc.
  • Fixed the alpha channel dropped by the xml-clip producer.
  • Added mlt_image_rgba64 format to:
    • avcolor_space filter
    • avdeinterlace filter
    • affine filter and transition
    • audiolevelgraph filter
    • audiospectrum filter
    • audiowaveform filter
    • autofade filter
    • avformat producer and consumers
    • box_blur filter
    • brightness filter
    • pillar_echo filter
    • color producer
    • dropshadow filter
    • dynamictext filter (when used with qtext)
    • frei0r.alpha0ps filter
    • frei0r.alphagrad filter
    • frei0r.alphaspot filter
    • frei0r.bluescreen0r filter
    • frei0r.select0r filter
    • frei0r.transparency filter
    • gpsgraphic filter
    • gpstext filter
    • gradientmap filter
    • hslprimaries filter
    • hslrange filter
    • kdenlivetitle producer
    • lift_gamma_gain filter
    • lightshow filter
    • mask_apply (when used with qtblend)
    • movit.convert filter
    • outline filter
    • qtblend filter and transition
    • qtcrop filter
    • qtext producer
    • shape filter
    • spot_remover filter
    • strobe filter
    • subtitle filter (when used with qtext)
    • swscale filter
    • text filter (when used with qtext)
    • timeremap link
    • timer filter (when used with qtext)
    • vqm transition
  • Changed the mask_apply filter default transition to qtblend.
  • Removed the maximum for the alpha property on the brightness filter so that you can increase the opacity of an existing alpha channel.
  • Fixed background image scaling in the gpsgraphic filter.
  • Fix audio artifacts with pcm_s24le in mkv in avformat producer.

Other

  • Removed bitrate and quality limits in the vp9 and webm avformat presets.
  • Fixed melt on Windows not reading file path/name with extended characters (regression in v7.34.0).
  • Fixed building the ruby bindings with Ruby 3.0.
  • More fixes for MSVC.
  • Removed win32/strptime.c and replaced with Qt functions.
  • Stop showing melt usage on error exit.

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MLT enables you to author, manage, and run multitrack audio/video compositions. Copyright © 2008-2026 by Meltytech, LLC.

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