News

v7.32.0 released

May 7, 2025

You can download it from GitHub.

Framework

  • Added mlt_service_set_consumer() and `Mlt::Service::set_consumer().
  • Optimized mlt_multitrack to not request a frame from a producer that is both hidden and muted.

Modules

  • Fixed pixel format for VP8/VP9 streams in avformat producer.
  • Fixed yuva422p pixel format in avformat producer.
  • Added MLT_AVFORMAT_HWACCEL & MLT_AVFORMAT_HWACCEL_DEVICE environment variables to avformat producer.
  • Updated decklink module for recent hardware and drivers.
  • Added colorspace and color_trc (including HDR) properties to the decklink consumer.
  • Fixed silencing extra audio channel (e.g. 6 => 8) in decklink consumer.
  • Fixed 5.1 C/LFE channels swapped over HDMI in decklink consumer.
  • Fixed text outline had sharp angles in kdenlivetitle producer.
  • Fixed default gamma to be Rec. 709 for 10-bit Y’CbCr from movit module.
  • Added support for HLG gamma to movit module (requires ddennedy/movit fork).
  • Fixed opencv_tracker filter should require multiple keyframes to be ready.
  • Fixed OpenCV crash on rect <= 1 pixel in opencv_tracker filter.
  • Fixed aspect ratio in qtblend filter and transition.
  • Fixed QT_QPA_PLATFORM=offscreen not working in qt and glaxnimate modules.
  • Improved preview scaling in qtblend filter.
  • Fixed requesting huge images on multiple qtblend filters or transitions.
  • Fixed sdl2 consumer on macOS.
  • Fixed the strobe filter not working with movit.
  • Fixed color and gamma using timeremap link with movit.
  • Fixed consumer properties (e.g. channels) missing on qglsl consumer injected by the xml producer.

v7.30.0 released

Jan 19, 2025

You can download it from GitHub.

Framework

  • Fixed Mlt::Producer::set_creation_time() not exported on i686.
  • Fixed Mlt::Properties::set(int64_t) symbol version.
  • Fixed mlt_factory_init() on Linux/BSD may fail to initialize when compiled with -DRELOCATABLE.
  • Added generic non-drop-frame timecode in mlt_property.c. Previously, it was only done for 30000/1001 and 60000/1001 frame rates, but 24000/1001 is especially important as well.
  • Added support for MLT XML embedded in chains. This, along with xml-clip producer handles mismatching frame rate between parent and child producers and facilites time-affecting links on the child.
  • Added mlt_image_full_range(const char *color_range) where any of the following strings return true (1): full, jpeg, pc.

Modules

  • Added xml-clip producer.
  • Fixed link in and out properties arenot serialized in the xml consumer.
  • Added hslprimaries and hslrange filters to the plus module.
  • Added a gradientmap filter to the plus module.
  • Fixed avfilter audio filters with FFmpeg 7.
  • Fixed incorrect frame rate for AVCHD (and possibly others) in avformat.
  • Fixed window_id property in consumer sdl2 by using SDL_CreateWindowFrom(), especially important for embedding in GTK+ or Qt.
  • Fixed text not rendering in transition vqm since Qt 6.
  • Added decimals keyword to gpstext filter and move RAW keyword check.
  • Fixed time_offset property handling in gpstext filter.
  • Fixed reading and writing SRT files with unicode in the path.
  • Fixed subtitle_feed filter on producers with an in point > 0.
  • Fixed opaque alpha channels become translucent in luma transition.
  • Fixed a crash in the mix transition with consumer producer.
  • Fixed freeze filter freezing too much.
  • Fixed avfilter.fillborders with preview scaling.
  • Fixed non-proportional scaling in qtblend transition and filter.
  • Fixed avfilter color distortion with mlt_image_rgb and mlt_image_rgba.
  • Extended support for colorspace=2020 consumer property and the BT.2020 colorspace in the avformat producer and consumer. This does not imply HDR, which is signaled through a color_trc property.
  • Added support for mlt_image_yuv420p10, mlt_image_yuv444p10, and mlt_image_yuv422p16 in avfilter, swscale, and rescale filters. This facilitates using these pixel formats end-to-end when using only FFmpeg producers, certain avfilters, and avformat consumer. This means it is possible to do 10-bit end-to-end on the CPU when being careful to select compatible components and options to avoid conversions. One can pass-through HDR; however, you must set the color_trc and pix_fmt properties on the avformat consumer (see ffmpeg -h full for these values). The avformat consumer automatically converts MLT colorspace (integer value) to FFmpeg’s colorspace and color_primaries (unless explicit) options.

Other

  • Cleaned up the examples in src/swig.
  • Changed the x264-medium preset to a higher quality.

v7.28.0 released

Sep 12, 2024

You can download it from GitHub.

This fixes a couple of major regressions in the previous version 7.26.0:

  • Fixed seeking and frozen video due by reverting “Improved performance with intra-only video and reducing the frame rate.”
  • Fixed using melt to render MLT XML with OpenGL effects from movit.

Other fixes and changes:

  • Deprecated the composite transition and the sdl and ndi modules.
  • Fixed Android camera video has the wrong frame rate (broken in v7.26.0).
  • Fixed audio not playing for audio-only DTS WMA.
  • Fixed using “https:” URLs in the xml producer.
  • Fixed crash on exit when running melt -query or melt -query links.
  • Added a transition property to the watermark filter. Now, it defaults to using affine.
  • Changed affine transition argument to set rect property if supplied.

v7.26.0 released

Aug 25, 2024

You can download it from GitHub.

This release adds support for subtitles and LV2 & VST2 audio plugins.

Framework

  • Fixed a double-free crash in Mlt::Service::profile().

Modules

  • Fixes and improvements to the avformat producer:
    • Changed to prefer r_frame_rate over avg_frame_rate.
    • Fixed lowres if set too high.
    • Fixed audio_index=all.
    • Fixed variable_frame_rate incorrectly set true on 59.94 fps in Matroska.
    • Improved performance with intra-only video and reducing the frame rate.
    • Fixed mono audio handling regression on FFmpeg 7.
    • Fixed audio samples may be dropped unexpectly esp. with uncompressed.
  • Fixed movit transitions with a non-movit filter on one of its inputs.
  • Fixed duration in the glaxnimate producer off by one frame.
  • Added dropshadow filter to the qt module.
  • Fixed resetting animation in kdenlivetitle producer.
  • Added support for LV2 and VST2 plugins in the jackrack module.
  • Fixed crash using av.declick audio filter on FFmpeg 7.
  • Added subtitle filter and producer and subtitle_feed filter to the plus module.
  • Added subtitle encoding to the avformat consumer (new properties beginning with “subtitle.”).
  • Fixed alang in the the avformat consumer.
  • Added #gps_power keyword to the gpstext filter.
  • Fixed tab handling in the kdenlivetitle producer.

Other

  • Added 8- and 10-bit encode presets for SVT-AV1.
  • Fixed building on OpenBSD.
  • Fixed building on musl libc.
  • Fixed consumer properties not updating the automatic profile on the melt command line.
  • Added -loglevel command line option to melt.

v7.24.0 released

Apr 27, 2024

You can download it from GitHub.

The highlight of this release is support for FFmpeg 7 and Ambsonic audio.

Framework

  • Fixed a small memory leak in mlt_repository.
  • Fixed a small memory leak in MltPushConsumer C++ class.
  • Block connecting a null producer to a service.
  • Include locale.h on any GNU libc platform.

Modules

  • Added a new spatialaudio module with filters:
    • ambisonic-decoder
    • ambisonic-encoder
  • Fixed building with FFmpeg 7.
  • Fixed text keywords do not work with non-ASCII filenames on Windows:
    • pixbuf producer
    • opencv_tracker filter
    • dynamictext filter
    • qimage producer
  • Added “meta.media.aspect_ratio” property to the avformat producer.
  • Fixed distort property not working in movit.rect filter.
  • Fixed frames dropping or repeating in the multi consumer.
  • Fixed the dynamic_loudness filter maximizing audio gain.
  • Fixed distortion in the mono filter.
  • Also check for WAYLAND_DISPLAY to detect a graphical session in the qt and glaxnimate modules.
  • Fixed the wave filter distorts if wave = 1 with preview scaling.
  • Added the read-only meta.media.%u.codec.layout property to avformat producer.
  • Set the channel_layout property on the frame for the noise and tone audio producers.
  • Fixed outline maximum for the text and dynamictext filters.

Other

  • Fixed crash when using -chain from melt.
  • Fixed a small memory leak on Windows fopen().

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