mlt

Framework

• Added new functions:
  • mlt_property_is_color()
  • mlt_property_is_numeric()
  • mlt_property_is_rect()
• Many new keyframe types:
  • mlt_keyframe_smooth_loose - ~= (same as old mlt_keyframe_smooth - Unity Catmull-Rom spline)
  • mlt_keyframe_smooth_natural - $= (Centripetal Catmull-Rom spline with natural slope)
  • mlt_keyframe_smooth_tight - -= (Centripetal Catmull-Rom spline with 0 slope)
  • mlt_keyframe_sinusoidal_in - a=
  • mlt_keyframe_sinusoidal_out - b=
  • mlt_keyframe_sinusoidal_in_out - c=
  • mlt_keyframe_quadratic_in - d=
  • mlt_keyframe_quadratic_out - e=
  • mlt_keyframe_quadratic_in_out - f=
  • mlt_keyframe_cubic_in - g=
  • mlt_keyframe_cubic_out - h=
  • mlt_keyframe_cubic_in_out - i=
  • mlt_keyframe_quartic_in - j=
  • mlt_keyframe_quartic_out - k=
  • mlt_keyframe_quartic_in_out - l=
  • mlt_keyframe_quintic_in - m=
  • mlt_keyframe_quintic_out - n=
  • mlt_keyframe_quintic_in_out - o=
  • mlt_keyframe_exponential_in - p=
  • mlt_keyframe_exponential_out - q=
  • mlt_keyframe_exponential_in_out - r=
  • mlt_keyframe_circular_in - s=
  • mlt_keyframe_circular_out - t=
  • mlt_keyframe_circular_in_out - u=
  • mlt_keyframe_back_in - v=
  • mlt_keyframe_back_out - w=
  • mlt_keyframe_back_in_out - x=
  • mlt_keyframe_elastic_in - y=
  • mlt_keyframe_elastic_out - z=
  • mlt_keyframe_elastic_in_out - A=
  • mlt_keyframe_bounce_in - B=
  • mlt_keyframe_bounce_out - C=
  • mlt_keyframe_bounce_in_out - D=
• Fixed missing support for mlt_service_transition in Mlt::Producer() C++ constructor.

Modules

• Fixed rotoscoping filter crash on image with height = 0.
• Fixed crashed due to qtblend transition requesting an image of 0 width or height.
• Added support for RtAudio 6 in the rtaudio consumer.
• Fixed createdate keyword deletes preceeding text in dynamictext filter.
• Added opacity property to filters that use qtext:
  • dynamictext
  • gpstext
  • qtext
  • timer
• Added fade_video, fade_audio, and fade_color properties to autofade filter.
• Added backwards compatibility for changed filter names in frei0r v2.3.1:
  • frei0r.measure_pr0be
  • frei0r.measure_pr0file
  • frei0r.tehroxx0r
  • frei0r.alpha0ps_alpha0ps
  • frei0r.alpha0ps_alphagrad
  • frei0r.alpha0ps_alphaspot
  • frei0r.denoise_hqdn3d
• Fixed a memory leak in avformat producer with consumer deinterlacer=yadif.
• Fixed qimage producer color if consumer color_range=pc pix_fmt=yuv444p.

Other

• Fixed ten_bit/ProRes 422 avformat preset produced ProRes 444.
• Fixed YouTube avformat preset did not output high profile with some hardware encoders.

Framework

• Fixed "blank" in a playlist does not have audio normalization filters.
• Fixed serializing mlt_color transparent black as "#00000000" when the property was set using an integer or mlt_color.
• Fixed mlt_chain_set_source() would always fetch a frame from the producer even if it has "meta.media.frame_rate_num" and "meta.media.frame_rate_den" properties making things slow.
• Fixed Mlt::Chain leaking memory.

Modules

• Added a blank producer to the core module.
• Added keywords to gpstext filter:
  • #gps_cadence#
  • #gps_grade_degrees#
  • #gps_grade_percentage#
  • #gps_temperature#
• Added some color_styles to the gpsgraphic filter:
  • 10 = color by speed (max 100 km/h)
  • 11 = color by grade (max 90 degrees)
  • 12 = color by grade (max 20 degrees)
• Added more unit formats to legend_unit property of gpsgraphic filter:
  • mmin or m/min
  • ftmin or ft/min
• Added keywords to dynamictext filter:
  • #basename#
  • #filename#
• Fixed installing filter_audioseam.yml.
• Added an avlink link to the avformat module for FFmpeg filters that can benefit from future frames such as adeclick.
• Added the preserve_alpha property to the box_blur filter.
• Fixed loading service metadata for the qt6 and glaxnimate-qt6 modules.
• Fixed a crash when changing the rotate property in avformat producer with interlace video.
• Add astream and vstream properties to avformat producer. Unlike audio_index and video_index are absolute indices across the entire array of streams regardless their type, these new 0-based properties are relative to the type audio or video. For example, astream=1 is the second audio stream.
• Fixed a possible crash in the avformat producer's mlt_producer_probe virtual function.
• Updated the glaxnimate module to version 0.5.4.
• Fixed the sdl2 consumer crashing with the Linux radeonsi_dri driver and showing only all black with the Linux nvidia driver.

Other

• Fix compiling on Android (not supported by the core developers).
• Changed the avformat consumer FLAC preset to use the flac format.
• Fixed the melt Shift+H and Shift+L keyboard shortcuts when the SDL2 window has focus.

Framework

• Added mlt_audio_free_data().
• Added meta.playlist.clip_position and meta.playlist.clip_length properties to mlt_playlist.
• Fixed mlt_frame_get_audio fails on mlt_audio_none.

Modules

• Added two audio filters to core module to be used on a playlist/track:
  • audioseam
  • autofade
• Fixed a crash in vidstab filter on image format change.
• Fixed font weight in qtext filter on Qt 6.
• Fixed yuv420p not working in rescale filter.
• Fixed text shadow outline in kdenlivetitle producer.
• Fixed crash when changing the profile with count producer.
• Fixed constructor corruption in frei0r module.
• Fixed deinterlace link was added to invalid producer in xml producer.
• Fixed producers not indicating progressive scan video:
  • kdenlivetitle
  • pango
  • qimage
  • qtext
• Fixed video scan mode detection in avformat producers that only indicate
  on their container format and not on frames such as Ut Video in Matroska.
• Fixed very large images in qimage producer on Qt 6.
• Fixed seeking on clips that use speed_map in timeremap link.
• Fixed a color level problem with sRGB inputs in the movit module.
• Fixed avformat producer's deallocation function for AVCodecContext.
• Fixed field order of qtblend and frei0r.cairoblend transitions.
• Changed the avformat producer seek_threshold default to 64.
• Updated ebur128 filter to version 1.2.6.

Framework

• Added a chain_normalizers.ini to the data directory.
• Added New C functions to support deinterlacer links:
  • mlt_deinterlacer_name()
  • mlt_deinterlacer_id()
  • mlt_link_filter_init()
  • mlt_link_filter_metadata()
  • mlt_cache_put_frame_audio()
  • mlt_cache_put_frame_image()
  • mlt_frame_clone_audio()
  • mlt_frame_clone_image()
• Added support for loading a filter as a link via mlt_link_filter_init().
• Added enum mlt_deinterlacer with:
  • mlt_deinterlacer_none
  • mlt_deinterlacer_onefield
  • mlt_deinterlacer_linearblend
  • mlt_deinterlacer_weave
  • mlt_deinterlacer_bob
  • mlt_deinterlacer_greedy
  • mlt_deinterlacer_yadif_nospatial
  • mlt_deinterlacer_yadif
  • mlt_deinterlacer_bwdif
  • mlt_deinterlacer_estdif
  • mlt_deinterlacer_invalid
• Added new 10-bit YUV members to enum mlt_image_format:
  • mlt_image_yuv420p10
  • mlt_image_yuv444p10
• Fixed a deadlock and improved quality of start of playback when mlt_consumer property prefill is greater than 1.
• Fixed a couple of data races in mlt_events and mlt_consumer.
• Fixed a crash in mlt_frame_clone() with movit and the mask_start filter.

Modules

• Fixed regressions in version 7.14.0:
  • memory and thread count usage in swresample and resample links
  • automatic profile support in melt
  • crash in count producer
• Upgraded the glaxnimate git submodule to version 0.5.3.
• Added avformat/avdeinterlace (default) and xine/deinterlace links.
• Fixed deinterlacing in the multi and qglsl consumers.
• Added 10-bit video support to movit.convert filter.
• Several things in the avformat producer:
  • Fixed artifacts decoding raw FLAC audio.
  • Fixed a potential crash on mlt_producer_probe().
  • Fixed seeking on music with album art.
  • Fixed possible infinite loop on end-of-file.
  • Fixed a potential deadlock.
  • Fixed chroma bleeding on interlaced yuv420p.
  • Fixed color_range or force_full_range sometimes not working.
  • Fixed autorotate property not working with a chain.
  • Added audio caching.
  • Deprecated the mute_on_pause property.
• Fixed FFmpeg version 6 compilation error.
• Fixed rendering the text outline in kdenlivetitle producer.
• Fixed 'movit.rect property animation.
• Fixed corrupt video in crop filter when mlt_image_yuv420p requested.
• Fixed possible null pointer crashes in some audio filters:
  • audiolevel
  • volume
  • loudness
• Fixed a possible roi assert crash in opencv.tracker filter.
• Added support for "Nano" algo to the opencv.tracker filter.
• Added the property fix_background_alpha to the luma transition.

Other

• Added -query links to melt command line.
• Added avformat consumer presets for 10-bit video:
  • AV1
  • DNxHR-HQ
  • FFV1
  • ProRes 422
  • ProRes 444
  • ProRes HQ
  • x264-high10
  • x265-main10
• Added a clang-format target to CMake and reformatted all code.
• Added warnings as errors with some exceptions to CMake with Debug build type and gcc.
• Fixed numerous warnings throughout the code.

Framework

• Added functions to get detailed info about a producer more directly (without having to get a frame and get its image in the case of
  avformat producer, for example):
  • mlt_producer_probe()
  • Mlt::Producer::probe()
• Added functions to add normalizer links to chains (based on a chain_loader.ini configuration data file:
  • mlt_chain_attach_normalizers()
  • Mlt::Chain::attach_normalizers()
• Changed locale_t to mlt_locale_t to avoid redefinition on some systems (e.g. clang/llvm on win32).
• Fixed the value provided with event "consumer-thread-join" to be mlt_event_data_thread as documented.
• Fixed mlt_image_format_planes() for mlt_image_yuv420p.

Modules

• Added a swresample link to the avformat module.
• Added a resample link to the resample module.
• Fixed compatibility of avformat module with FFmpeg version 6.
• Fixed rotoscoping filter when request image size different than profile.
• Fixed timeremap link breaking crop filter.
• Fixed audio/video sync in avformat producer when the video start time is not 0.
• Improved seeking on a WMA audio file in avformat producer.
• Optimization to set AVDISCARD_ALL on disinterested streams in avformat producer.
• Added separate demuxing thread in avformat producer.
• Added filtergraph property to the avformat producer.
• Fixed filter movit.convert's CPU image converter in mlt_tractor and mlt_frame_clone().
• Fixed using movit module with mlt_chain.
• Fixed 10-bit full range YUV color input with Movit.
• Fixed aspect ratio issues in qtblend filter transform.
• Fixed the movit.luma transition.
• Changed the qglsl consumer to use an OpenGL core profile version 3.2 context to make it compatible with recent Movit versions.
• Upgraded glaxnimate git submodule to version 0.5.2.
• Fixed xml producer incorrectly adds a path prefix to a consumer producer.
• Fixed using opencv.tracker filter with mlt_chain.
• Added interlace-aware chroma conversion from mlt_image_yuv422 to yuv420p in the avformat consumer.
• Added the speed_map property to the timeremap link.
• Fixed the loader producer not injecting the consumer producer when a xml producer changes the frame rate.
• Fixed 'loader' producer corrupts the profile colorspace and description when it injects a consumer producer.
• Added a loader-nogl producer to the core module based on loader but prevents adding movit-based filters.
• Changed count producer to take an optional string argument with the name of a loader producer.
• Fixed yadif deinterlace not working in a mlt_chain.
• Fixed the bob, weave, greedy, onefield deinterlace filter methods on x86-64 architecture.

Other

• Fixed SWIG python shadow functions for mlt7.
• Added CMake build option MOD_GLAXNIMATE_QT6.

This version is released soon after 7.10.0 to fix a couple of major new bugs in the popular qtblend and frei0r.cairoblend transitions. It also includes new color animation APIs with sensible interpolation!

Framework

• Added new color animation APIs:
  • mlt_property_set_color()
  • mlt_property_get_color()
  • mlt_property_anim_set_color()
  • mlt_property_anim_get_color()
  • mlt_properties_anim_set_color()
  • mlt_properties_anim_get_color()
  • Mlt::Properties::anim_get_color(char const*, int, int)
  • Mlt::Properties::anim_set(char const*, mlt_color, int, int, mlt_keyframe_type)

Modules

• Updated the following services to support animation of color properties:
  • frei0r (any color parameter in any frei0r plugin)
  • chroma
  • chroma_hold
  • audiolevelgraph
  • audiospectrum
  • audiowaveform
  • gpsgraphic
  • gpstext
  • qtcrop
  • qtext
• Added discontinuity_reset property to dynamic_loudness filter.
• Fixed qtblend transition not blending with an opaque rgba image.
• Added support for the "finer" engine in Rubberband version 3.
• Fixed crash in frei0r.cairoblend when threads property not set.

Other

• Fixed leaking the xml producer in melt when the XML contains a consumer element but no profile information.
• Fixed symbol not found error in rtaudio consumer.

The highlight of this version is support for Qt 6.

Framework

• Fixed some unguarded null pointers.
• Added MLT_REPOSITORY_DENY environment variable to skip loading a module (colon delimited list of file names without extension, for example "libmltqt").
• Fixed frame corruption with one frame transition.
• Changed so-called test-card frame with audio to show a checkerboard:
  • Added mlt_image_fill_checkerboard()
  • Added mlt_image_fill_white()
• Preserve the producer creation_time property when creating a chain.
• Added mlt_image_rgba_opaque().
• Fixed getting a property as a timecode or clock value with 24 or 23.98 fps in mlt_property.c.

Modules

• Added support for Qt 6:
  • Added MOD_QT6 and BUILD_TESTS_WITH_QT6 CMake options.
  • Allow installing building and installing both Qt 5 & 6 modules.
  • Avoid loading both Qt 5 & 6 modules by preferring Qt 5 (use MLT_REPOSITORY_DENY=libmltqt to block Qt 5 and use Qt 6).
  • This is limited to the qt module for now and not glaxnimate (still a work-in-progress).
• Added support for WebP animation to qimage producer.
• Added gps_graphic filter to the qt module.
• Added the format property in each producer's get_frame method to indicate the producer's default/preferred mlt_image_format to facilitate an optimization in the qtblend transition when the B frame is opaque and has the same aspect ratio.
• Added property animation to all audio visualization filters in the qt module.
• Improved TGA format detection in qimage filter.
• Fixed qtblend transition has incorrect scaling with consumer scaling.
• Fixed an case of incorrect alpha scaling in qtblend transition.
• Fixed luma transition not updated when resource property changes.
• Added the alpha_operation property to the shape filter.
• Updated the glaxnimate git submodule to version 0.5.1.
• Fixed lines filter in oldfilm regression in v7.6.0.
• Added dbpeak property to the audiolevel filter in dB.
• Fixed memory leak using some frei0r plugins in conjunction with an affine that animates the rect property.

Other

• Fixed building for musl.
• Fixed underlinking iconv in gdk module on MinGW.
• Fixed SWIG CMake options can overwrite each other.
• Fixed SWIG 4 no longer generates a mlt.php.

This highlight of this version is a new glaxnimate producer to render 2D vector art and animation.

Framework

• Added mlt_frame_get_alpha_size() and refactored code to use it.
• Fixed a possible null pointer crash in mlt_service_apply_filters().

Modules

• Added a glaxnimate producer to the glaxnimate module.
• Added new file extensions for glaxnimate producer: json, lottie, rawr, tgs.
• Removed Qt4 compatibility from the qt module.
• Added Qt6 compatibility to the qt module.
• Added new file extensions for qimage producer: avif, heic, heif, jxl.
• Fixed color_range when using the multi consumer.
• Fixed reloading updated results in the loudness filter.
• Fixed image_mode=blend in the timeremap link.
• Fixed crash regression in swscale filter with odd size YUV image.
• Fixed the choppy filter may result in black frames with transitions.
• Prevent a crash in avfilter producer for a bug in glibc with _FORTIFY_SOURCE=3.

This version adds image slice-threading to many filters and full support for full range color. All inputs are normalized to and processed at
the range specified by the consumer property color_range that defaults to tv/mpeg (limited).

Framework

• Added Mlt::Animation::next_key() and previous_key() with error checking.
• Fixed the moduledir and mltdatadir variables in the pkg-config file.
• Removed calling setlocale() in mlt_factory_init() (moved to melt option -setlocale).
• Added mlt_properties_copy() and Mlt::Properties::copy().
• Changed some primarily internal property names to consolidate on "consumer." as a prefix convention for all consumer properties copied to mlt_frames.
• Added consumer property deinterlacer to replace deprecated deinterlace_method.
• Fixed full range color from producer to consumer.
• Added mlt_slices_size_slice() helper function.
• Fixed choppy playback due to large values in frame_rate_num or frame_rate_den in mlt_consumer.
• Added performance optimization for a single slice in mlt_slices.

Modules

• Added audiolevelgraph video filter to the qt module.
• Added property segment_gap to the audiospectrum video filter.
• Added segments property to the audiolevelgraph and audiospectrum filters.
• Fixed loading image sequence with extended UTF-8 characters in the of a folder for the qimage producer.
• Fixed a crash in avformat producer if the rotate property is set after first frame is fetched.
• Added the invert_mask property to the shape video filter.
• Changed avformat producer to normalize frame rates very close to integer broadcast frames 24/1.001, 30/1.001, and 60/1.001.
• Converted the chroma and chroma_hold filters' key property to a proper type.
• Added slice threading to:
  • avformat producer (with FFmpeg v5)
  • swsscale (with FFmpeg v5)
  • lift_gamma_gain
  • shape
  • charcoal
  • vignette
  • wave
  • threshold
  • tcolor
  • sepia
  • mirror
  • invert
  • grain
  • lines
  • spot_remover
• Improved the speed of the oldfilm filter.
• Added a faster box_blur filter to the core module and deprecated the boxblur` filter in the kdenlive module.
• Fixed preview scaling for the avfilter.gblur filter.
• Fixed incorrect text overlap in kdenlivetitle producer.
• Improved audio synchronization in avformat when playing in reverse.
• Added much more service metadata (documentation).
• Fixed full range 10-bit video input in avformat producer.
• Fixed full range color handling in:
  • avformat producer
  • avcolor_space
  • brightness
  • resize
  • luma transition
  • movit.convert
  • charcoal
  • invert
  • shape
• Fixed identifying unsupported colorspaces in avformat producer.
• Fixed preserving the alpha channel in the avfilter.fspp filter.

Other

• Some CMake fixes.
• Added dumb-init to the docker (no need to remember docker run --init).

This main highlight of this version is property animation for avfilter!

Framework

• Added more constructors and assignment operators in C++ wrapper:
  • Mlt::Filter::Filter(Mlt::Filter*)
  • Mlt::Link::Link(Mlt::Link*)
  • Mlt::Link::Link(Mlt::Service&)
  • Mlt::Link::Link(Mlt::Link&)
  • Mlt::Link::Link(Mlt::Link const&)
  • Mlt::Link::operator=(Mlt::Link const&)
  • Mlt::Service::Service(Mlt::Service*)
• Fixed serialized animation in mlt_animation_serialize_cut_tf() and mlt_animation_serialize_cut() to include a trailing keyframe value.

Modules

• Added property animation for avfilter filters.
  This only works for numeric parameters, but many libavfilter options that have a type string are actually numeric in nature but accept a string
  expression.
• Added rotate property to avformat producer to override orientation.
• Changed jackrack module to silence false LADSPA plugin loading errors.
• Fixed a crash in the oldfilm filter when using preview scaling.
• Fixed timeremap link distorts audio when speed is zero.
• Added nautical mile and knot units of measure to the gpstext filter.
• Fixed full range color handling with embedded tractor (e.g. same track transition).
• Fixed device capture in avformat producer regression in version 7.2.0.
• Fixed a crash in the matte transition.

This is the first major maintenance release for the new major version 7 rendering it much more production ready. Plus there are a few nice new features.

Framework

• Added support for mlt_properties as a child of mlt_properties
  including XML (de)serialization:
  • mlt_property_set_properties()
  • mlt_property_get_properties()
  • mlt_properties_set_properties()
  • mlt_properties_get_properties()
  • mlt_properties_get_properties_at)(
  • Mlt::Properties::set()
  • Mlt::Properties::get_props()
  • Mlt::Properties::get_props_at()
    Applications can use this to store structured data in its own namespace, for example "shotcut:markers". And modules could use this for hierarchical parameters.
• Fixed crash in mlt_transition upon inserting or removing a track.
• Stopped loading mlt_profile until needed in mlt_chain creation.

Modules

• Added filter gpstext that is similar to dynamictext based on data in a GPX file.
• Added speed parameter to timer filter.
• Added WebP presets for avformat consumer.
• Added a pixelate option to the opencv_tracker filter's blur property.
• Fixed center_bias of crop filter not working with use_profile.
• Fixed some missing RGB mlt_image_format renames after change in v7.0.0. This primarily affected presets and service metadata.
• Fixed a crash when changing preview scaling in timeremap link.
• Fixes problems due to adding redundant normalize filters upon loading a producer from XML.
• Ensure filters added by the loader producer always come first in list.
• Fixed a crash using shape and affine filters together on color producer.
• Fixed a crash when a vidstab file fails to open.
• Changed vidstab filter to save its file in ASCII text mode.
• Fixed a clang LTO error in the decklink module.
• Fixed a video decoding regression on some videos in the avformat producer.
• Fixed a crash in the audiowaveform filter.
• Fixed loading a relative filename from XML for mask_start with shape.
• Fixed "#filedate#" in dynamictext filter when used with timeremap link.
• Fixed timer filter's new speed property interaction with start delay.
• Fixed a crash with YUYV422 (YUY2) input in avformat producer.
• Fixed data race condition in timeremap link.
• Fixed compiling avformat module with FFmpeg git beyond v4.4 with many deprecations removed.
• Fixed alpha channel size calculation in brightness filter.
• Restore legacy tracker and the new DaSiam tracker for OpenCV >= 4.5.3 in the opencv_tracker filter.
• Fixed a crash in opencv_tracker on shape_width = 0.
• Fixed incorrect handling of in and out points and duration in the opencv_tracker filter.
• Fixed the composite transition leaking left border of an image on the right side on uneven width.
• Fixed a problem handling some UTF-8 in thhe typerwriter filter.

Other

• Added support for the RELOCATABLE CMake option for Linux or BSD build.

This version is just build fixes for the most immediate problems with the somewhat new but exclusive build system in v7.

• Fixed docker image not working.
• Fixed a system-installed build cannot finds its modules and data.
• Fixed the python installation path for binaries.
• Added support for the DESTDIR environment variable when creating melt symlink.
• Increased the build constant for the maximum size of a line of a properties file.
• Fixed the vid.stab metadata install path.

This is a major new version that breaks API to add a major new feature to the framework: retiming. This is accomplished through new classes mlt_chain and mlt_link. And since we are breaking API we decided to clean house by removing deprecations and switching the build system over entirely to CMake. For more information see our migration guide. More documentation about the new chain and link classes is still pending.

Framework

• Added mlt_chain and Mlt::Chain classes.
• Added mlt_link and Mlt::Link classes.
• Added a link value to service type in the service metadata schema.
• Added a boolean animation parameter attribute to the service metadata schema.
• Added mlt_animation_shift_frame() and Mlt::Animation::shift_frames().
• Added mlt_animation_get_string().
• Fixed using a stale cached property animation string.
• Added mlt_image and Mlt::Image classes.
• Remove legacy "height + 1" workaround in image allocation.
• Fixed a crash on setting timewarp speed higher than 23x.
• Added mlt_audio_silence().
• Removed mlt_image_opengl.
• Replaced variadic arguments in mlt_events with new mlt_event_data APIs.
• Removed mlt_geometry APIs.
• Renamed mlt_image_rgb24a as mlt_image_rgba.
• Renamed mlt_image_rgb24 to mlt_image_rgb.
• Renamed mlt_image_glsl to mlt_image_movit.
• Renamed mlt_image_glsl_texture to mlt_image_opengl_texture.
• Removed virtual function mlt_frame::get_alpha_mask().
• Removed mlt_frame_get_alpha_mask().
• Removed deprecated functions:
  • mlt_sample_calculator
  • mlt_sample_calculator_to_now
  • mlt_channel_layout_name
  • mlt_channel_layout_id
  • mlt_channel_layout_channels
  • mlt_channel_layout_default
  • mlt_slices_init
  • mlt_slices_close
  • mlt_slices_run
  • mlt_playlist_move_region
  • Mlt::Playlist::move_region
• Fixed a rounding error calculating display aspect ratio in mlt_profile_from_producer().

Modules

• Added a timeremap link to the core module with animatable map property.
  (Speed can increase or decrease between keyframes including reverse.)
• Added chain and link XML elements to xml module.
• Added "meta.media.has_b_frames" property to avformat producer.
• Removed deprecated modules:
  • dv
  • gtk2 (not gdk)
  • kino
  • linsys
  • lumas
  • motion_est
  • swfdec
  • videostab
• Removed the following services:
  • data_feed filter
  • data_show filter
  • region filter and transition
  • sdl_image
• Converted filters to use new mlt_image class:
  • brightness
  • imageconver
  • mirror
  • spot_remover
• Deprecated the audiowave filter.
• Added the ability to build the jackrack module without JACK to get only
  LADSPA producers and filters.
• Deprecated start and end properties for the following filters:
  • brightness
  • panner
  • boxblur
  • wave
  • volume
• Removed deprecated font property from pango producer.
• Improved album art (attached pic) detection in avformat producer.
• Improved the resample filter to have less artifacts and use less memory.

Other

• CMake: nearly complete rewrite.
• Removed the old configure bash scripts and Makefiles.
• Added -chain and -link options to melt command line.

This version fixes a major regression in version 6.26.0 in the avformat producer to read from network URLs.

This is the last planned release of major version 6. Version 7 will be released soon and introduce some minor API breakage while removing deprecations. The main new feature in this version is hardware-accellerated decoding! However, this is a basic implementation: It always returns the uncompressed video to the CPU memory with no pipelining to filters. Even when coupled with hardware encoding in the avformat consumer it must transfer the video. Also, there is no automatic software/CPU fallback and no resource management.

Modules

• Added support for hwaccel query string parameter to the avformat producer. It accepts the following values:
  vaapi (Linux/BSD), cuda (Linux), videotoolbox (macOS), d3d11va (Windows), dxva2 (Windows)
• Added support for hwaccel_device query string parameter to the avformat producer. This is only used with vaapi (device path) and cuda, d3d11va, or dxva (number).
• Improved the usage of image slice threading in frei0r. This only applies when threads=0 and only works with some frei0r plugins that you must decide yourself.
• Added an ellipse item to kdenlivetitle producer.
• Added support for PNG and GIF as album art in the avformat producer.
• Added BT.2020 color space metadata to the avformat producer.
• Resolved many FFmpeg deprecations in the avformat producer making it possible to support AV1 decoding.
• Added a strobe fitler that periodically makes the alpha channel transparent.
• Added a new typewriter text filter (currently only works with the kdenlivetitle producer).
• Improved sound quality for lower pitch shifts in rbpitch.
• Fixed speed of trick play in the jack, rtaudio, sdl_audio, and sdl2_audio consumers.
• Fixed matrix for independent channels in swresample filter.
• Fixed leading zeros for the timer filter.
• Fixed flickering using affine with a luma transition.
• Fixed a crash using RGBA images in the qimage producer (regression in v6.22.0).
• Fixed brightness filter misbehaves on alpha > 1.
• Fixed writing flac format file does not set its duration in the avformat consumer.
• Fixed an infinite loop in rbpitch filter.
• Fixed ttl in the qimage producer.
• Fixed building with OpenCV 4.5
• Fixed artifacts with multiple HTML qtext filters and frame threading.
• Deprecated the start and end properties on the following (use property animation instead):
  • brightness
  • panner
  • boxblur
  • wave
  • volume
• Deprecated the following services:
  • data_show
  • region
  • transition filter
  • autotrack_rectangle
  • motion_est
  • slowmotion

Other

• CMake:
  • Fixed building without SWIG.
  • Added many "MOD_..." options to explictly disable modules.
  • Added src/tests and the option BUILD_TESTING, which defaults off.
  • All dependency checks moved to top level CMakeLists.txt.
  • Install melt man page.
  • Install oldfilm SVG files.
  • Added src/examples.
  • Install framework/metaschema.yaml.
  • Fixed plusgpl datadir.
  • Added all swwig/ languages.
  • Increased C++ standard to C++14.
• Added an AV1 encoding preset.
• Improved documentation of the requirement for C11.
• The minimum version of FFmpeg is v4.0 and Libav is no longer supported.

This version is mostly fixes plus a few new filters.

Framework

• Trigger a property-changed event on mlt_properties_pass_list.
• Fixed using a video transition with a video clip on an audio track.
• Reduce the amount of service caching to 2X #tracks to reduce memory usage.

Modules

• Added the pillar_echo filter to the plus module.
• Added a qtcrop filter to the qt module.
• Added html, resource, overflow-y, and _hide properties to the qtext filter for rich text.
• Added the filter choppy to the core module.
• Added slice threading to the brightness filter.
• Fixed compiling with OpenCV 4.
• Fixed the colors when using mlt_image_format=rgb24a with avformat consumer.
• Fixed using WebVfx in a Docker container.
• Fixed a possible crash in the timewarp producer on sources with non-integer frame rates.
• Fixed a regression in version 6.22 with multiple affine filters at the same time.
• Fixed possible abort or deadlock on recursive pthread mutexes in avformat producer.
• Fixed a crash in crop filter with large center_bias value when use_profile is 1.
• Fixed a white video frame appearing on threaded rendering in freeze filter.
• Fixed MLT XML DRD to permit empty playlists, which may occur on empty tracks in a multitrack.
• Fixed initializing QApplication in the qimage producer.
• Fixed interpolation when scaling with the affine rect and geomety properties.
• Fixed high memory usage with high factors of pitch shifting in the rbpitch filter.
• Fixed a crash on files with more than 32 streams in the avformat producer.

Other

• Fixed CMake build on MSYS2 and Windows Craft.
• Added the Python binding to the CMake build.
• Added the sdl (v1) module to the CMake build.
• Removed minrate and maxrate from the webm avformat consumer preset.

This patch version only fixes the version reported in the CMake build.

This version fixes bugs associated with the preview scaling introduced in the
previous version.

Framework

• Added mlt_properties_exists() and Mlt::Properties::property_exists().
• Added mlt_audio C class with:
  • mlt_audio_new()
  • mlt_audio_close()
  • mlt_audio_set_values()
  • mlt_audio_get_values()
  • mlt_audio_alloc_data()
  • mlt_audio_calculate_size()
  • mlt_audio_plane_count()
  • mlt_audio_plane_size()
  • mlt_audio_get_planes()
  • mlt_audio_shrink()
  • mlt_audio_reverse()
  • mlt_audio_copy()
  • mlt_audio_calculate_frame_samples()
  • mlt_audio_calculate_samples_to_position()
  • mlt_audio_channel_layout_name()
  • mlt_audio_channel_layout_id()
  • mlt_audio_channel_layout_channels()
  • mlt_audio_channel_layout_default()
• Added Mlt::Audio C++ class with:
  • Mlt::Audio::Audio()
  • Mlt::Audio::Audio(mlt_audio_s*)
  • Mlt::Audio::~Audio()
  • Mlt::Audio::data()
  • Mlt::Audio::set_data(void*)
  • Mlt::Audio::frequency()
  • Mlt::Audio::set_frequency(int)
  • Mlt::Audio::format()
  • Mlt::Audio::set_format(mlt_audio_format)
  • Mlt::Audio::samples()
  • Mlt::Audio::set_samples(int)
  • Mlt::Audio::channels()
  • Mlt::Audio::set_channels(int)
  • Mlt::Audio::layout()
  • Mlt::Audio::set_layout(mlt_channel_layout)
• Fixed drop-frame timecode for 59.94 fps.
• Fixed crash on null pointer passed to mlt_consumer_stop().

Modules

• Fixed frei0r transitions with preview scaling.
• Fixed affine ox and oy properties incorrect with preview scaling.
• Fixed a crash and incorrect preview scaling with more than one affine
  filter active on the same frame.
• Fixed preview scaling for the rotoscoping filter.
• Moved some services from gtk2 module to a new gdk module:
  • gtkrescale filter
  • pango producer
  • pixbuf producer
• Deprecated the gtk2 module and no longer enabled by default.
• Deprecated the linsys (DVEO SDI) module.
• Added the sample_fmt property to the avformat consumer.
• Fixed a possible segfault in the mix transition.
• Removed support for text keyframes to the text and qtext filters
  to fix regression on strings containing '='.
• Disable frame-threading with bigsh0t, distort0r, and medians frei0r plugins.
• Added meta.media.%d.stream.projection property the avformat producer.
• Fixed a crash with with filters not supporting preview scale in frei0r
  transitions.
• Fix artifacts in luma transition and affine filter with frame-threading.
• Stop including title="Anonymous Submission" in xml consumer.
• Fixed a crash in opencv.tracker filter.
• Fixed a crash in composite transition if luma file fails to load.
• Added validations in opengl module to prevent asserts in Movit.
• Fixed building with OpenCV 4.
• Changed avformat producer to accept a '?' in argument/resource property
  by escaping it as '?'.
• Changed the background property of the affine filter to be mutable.
• Fixed changing the audio_index property in the avformat producer.
• Changed resample filter to more resiliant to frequency changes.
• Added a video_delay property to the sdl2_audio and rtaudio consumers.
• Add millisecond options to the timer filter.
• Fixed the in point handling for the timewarp producer.
• Fixed some audio gaps and sync issues with the rbpitch filter and timewarp
  pitch compensation.
• Fixed a possible crash caused by producer consumer.
• Changed avformat consumer to set AVOption color_primaries based on the
  MLT colorspace if not already set as property.
• Fixed crop right on image with odd width skews image in crop filter.
• Fixed incorrect silence value for unsigned 8-bit audio in avformat producer.
• Changed qimage to use Qt's internal orientation detection instead of libexif.
• Reduced clicks in mix transition by silencing buffers on discontinuity.
• Improved A/V synchronization in swresample and resample filters - also reduces audio clicks.
• Improved speed of the qimage producer.
• Fixed incorrect color using libx264rgb in avformat consumer.
• Fixed relative paths for avfilters that have the filename option.
• Fixed some avfilters dropping the alpha channel: smartblur, vaguedenoiser.
• Improved performance of the resize filter.
• Fixed an affine filter inside a transition was always nearest neighbor
  interpolation.
• Changed the lift_gamma_gain filter to use round values up.

Other

• Fixed melt option -group applies to an implicit consumer.
• Added -quiet option to melt (implies -silent but more so).
• CMake build improvments adding modules:
  • gdk
  • jackrack
  • lumas
  • resample
  • sox
  • vorbis
• Added avformat consumer presets:
  • Slide-Deck-H264
  • Slide-Deck-HEVC
• Removed "intra=1" from some avformat presets (use g=1 for intra only):
  • intermediate/MPEG-2
  • intermediate/MPEG-4
  • lossless/H.264
• Fixed using Qt, Movit, and WebVfx in the official docker image:
  https://hub.docker.com/repository/docker/mltframework/melt
  IMPORTANT: it now requires docker run with the --init option.

This version adds support for low resolution preview scaling and adds a
module based on librubberband for audio pitch-shifting.
An official docker image is now available at
https://hub.docker.com/repository/docker/mltframework/melt

Framework

• Added consumer scaling:
  • mlt_profile_scale_width()
  • mlt_profile_scale_height()
  • Mlt::Profile::scale_width()
  • Mlt::Profile::scale_height()
  • support for a double "scale" property to melt and the xml producer
• Fixed mlt_properties_set() with an invalid expression.
• Added new functions that do not evaluate expressions:
  • mlt_properties_set_string()
  • Mlt::Properties::set_string()
• Improved the service-caching heuristic in mlt_multitrack.
• Fixed possible crashes in mlt_playlist get_frame() and mlt_filter_process().

Modules

• Added the rubberband module with a rbpitch filter.
• Added pitch compensation to timewarp producer.
• Added the invert_scale property to the affine filter and transition.
• Added the reverse property to shape filter.
• Added support for text keyframes to the text and qtext filters.
• Added support for the CSRT and MOSSE algorithms in opencv.tracker filter.
• Fixed a crash on empty algo property in the opencv.tracker filter.
• Changed vorbis module to no longer be deprecated.
• Improved colorspace conversions in the avformat module.
• Fixed audio artifacts on initial seek to in point in avformat producer.
• Fixed the colorspace of the cached image in avformat producer.
• Fixed white video flashes on property changes in the qtext filter.
• Fixed a crash in the rotoscoping filter with large spline deviations.
• Fixed a crash in the sdi consumer if the driver is not loaded.
• Improved support for a video clip as luma producer to the luma transition.
• Fixed a crash in the matte transition.
• Fixed a crash when using invert property =1 in the composite transition.

Other

• Added a Dockerfile and integrated docker build into Travis CI.
• Added more avformat consumer presets:
  • intermediate/DNxHR-HQ
  • intermediate/ProRes HQ
  • ALAC
  • FLAC
  • Fixed some parameters in the XDCAM and D10 avformat presets.
  • Fixed link failure on some CPU architectures.

This version is a general maintenance release with a bunch of fixes, improvements, and additions.

Framework

• Fixed some data races in mlt_consumer, mlt_deque, and mlt_property.
• Fixed the mlt_events listener incorrect owner argument.
• Added support for the LC_ALL environmant variable on Windows.
• Fixed the argument to mlt_factory_init() not working on Windows.
• Fixed mlt_service_identify() not reliable in some use cases.
• Added some default and copy constructors and assignment operators to mlt++
  • Filter()
  • Filter( const Filter &filter )
  • Filter& operator=( const Filter &filter )
  • Producer( const Producer &producer )
  • Producer& operator=( const Producer &producer )
  • Properties( const Properties &properties )
  • Properties& operator=( const Properties &properties )
  • Service( const Service &service )
  • Service& operator=( const Service &service )
  • Transition()
  • Transition( const Transition &transition )
  • Transition& operator=( const Transition &transition )
• Added mlt_luma_map:
  • mlt_luma_map_init
  • mlt_luma_map_new
  • mlt_luma_map_render
  • mlt_luma_map_from_pgm
  • mlt_luma_map_from_yuv422
• Fixed preset overrides depend on the XML attribute order.
• Fixed serializing an animated property with a new length.

Modules

• Fixed interpolation in rotoscoping filter.
• Fixed crop filter not working with color producer.
• Fixed some data races in the sdl and sdl2 consumers.
• Fixed some data races in the avformat producer.
• Added a movit.flip filter to the opengl module.
• Fixed using filters on frei0r producers.
• Added support for in and out attributes on the consumer xml element.
• Fixed using an in point with the multi consumer.
• Fixed avfilter fails if the image size changes.
• Fixed showing superfluous decimals for seconds in the timer filter.
• Stop serializing an invalid producer as an "INVALID" text producer in xml.
• Fixed an access violation crash in wave filter.
• Added the meta.media.color_range property to the avformat producer.
• Fixed full range yuv422p not converted correctly in the avformat producer.
• Fixed the text filter not working with pango.
• Fixed a regression using dynamictext with pango.
• Added a position property to avfilter for filters that need position info.
• Fixed avfilter.subtitles not using the source position.
• Added an analyze property to vidstab filter. When set, analysis only starts
  and the results file written if true.
• Fixed crash combining the affine filter with the shape filter.
• Added interlace detection from AVCodecContext.field_order.
• Changed the avformat producer to not use the rescale.interp frame property.
  Previously, when reacale.interp == "nearest", it would relax seeking. Now, seek
  accuracy is reduced during trick play (rewind or fast forward).
• Fixed swscale flags for auto-inserted scalers in avfilter.
• Fixed a double free crash in ladspa filter on channel count mismatch.
• Refactored the composite and luma transitions to use mlt_luma_map.
• Refactored the pgm producer and shape filter to use mlt_luma_map.
• Refactored the lumas module to use mlt_luma_map.
• The lumas module is now disabled by default and must be explicitly enabled.
• Added property animation to the threshold filter.
• Added a cairoblend_mode filter to the frei0r module to affect a
  frei0r.cairoblend transition used to composite/blend tracks.
• Added support for new vaapi options to the avformat consumer:
  • connection_type: x11 or drm
  • driver
  • kernel_driver
• Fixed the timewarp producer with a colon in the filename.
• Fixed a relative file name with a colon in it in the xml producer.
• Fixed defaulting to album or poster art if there is another video stream.
• Fixed parameter animation in frei0r plugins when using frame threads.
  This change also enables frame-threading for more plugins.
• Improved the qtblend filter to not process alpha if no transparency.
• Added a background_color property to the qtblend filter.
• Fixed the opencv.tracker incorrect behavior on cut clips.
• Changed opencv.tracker to store absolute frame numbers.
• Fixed incorrect frame offset on render in opencv.tracker.
• Add an alpha_over property to luma transition. This addresses a behavior
  regression in version 6.14.0.
• Fixed noimagecache not working in the avformat producer.

Other

• Mlt++ now requires C11 compiler support.
• Fixed closing melt SDL2 window from window manager (i.e. close button).
• Added -repository option to the melt command.
• Added unit tests for Mlt::Event.
• Fixed returning image data for Python 3.
• Switch to python3 by default.
• Updated the prores encoding presets to set vendor ID and colr atom.
• Added a CMake build system. This is not yet prefered over the existing
  configure script and Makefiles and has less flexibility. It is a start and
  has limited support.