MLT - v7.34.0 released

Nov 3, 2025

This versions adds 10-bit video processing on the CPU, but you must ensure you are using compatible filters and transitions.

Framework

Added mlt_image_rgba64 format. This change touched core, avformat, and qt modules as well.
Added mlt_color_trc, mlt_color_primaries, and more mlt_colorspaces along with functions:
- mlt_image_color_trc_name
- mlt_image_color_trc_id
- mlt_image_colorspace_name
- mlt_image_colorspace_id
- mlt_image_color_pri_name
- mlt_image_color_pri_id
Fixed some minor memory leaks with cppcheck.

Modules

Added rgba and rgba64 formats to the luma transition.
Added rgba64 format to affine filter and transition.
Added rgba64 format to the qtblend transition.
Added support for FFmpeg 8 to the avformat module.
Fixed audio panner filter for 5.1 channel layout.
Fixed converting 10-bit full to limited range in avformat producer (regression in v7.30.0).
Fixed shadow not working for multi-line template titles in kdenlivetitle producer.
Fixed mask_apply filter with custom transition.
Added input_chmask & output_chmask properties to mono filter.
Added channel_mask property to LADSPA/LV2/VST2 filters.
Added channel_mask to the volume filter.
Added an outline video filter.
Fixed a deadlock on image with a % in the name in qimage producer.
Added scrubbing to the decklink consumer.
Fixed & not decoded to & in the xml producer.
Fixed converting BT.709 to BT.2020 in the avformat module.
Fixed building a ladspa module without JACK as dependency.
Deprecate a JACK Rack XML file in the jackrack and ladspa modules.
Added filter qtblend_mode.
Fixed incorrect alpha channel breaking optimization of qtblend.
Fixed pixel format gbrap (Ut Video with alpha channel) in the avformat producer.
Fixed opencv_tracker filter on cut playlist clips.
Fixed warning about missing color range for avfilters that use it (e.g. avfilter.colorspace).
Added typewriter properties to the qtext filter.
Fixed color distortion or a crash if using hwaccel with orientation rotation in avformat producer.

Other

Enable Qt 6 and disable Qt 5 modules in CMake by default.
Disable the SDL1 module in CMake by default.
Changed melt now exits with 1 if the producer is invalid.
Various changes to work with MSVC compiler.
Changed SVT-AV1 encode presets to VBR for Opus audio.
Fixed initializing Qt on the main thread in melt.
Documented the -progress2 option for melt.
Increased the minimum C++ version to C++20.
Converted many modules to use CMake find_package().
Added libgen.c and libgen.h for MSVC.

v7.34.0 released

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