The easiest way to try out and learn MLT is by downloading
Shotcut.
You can download it from GitHub.
This versions adds 10-bit video processing on the CPU, but you must ensure you are using compatible filters and transitions.
mlt_image_rgba64 format. This change touched core, avformat, and qt modules as well.mlt_color_trc, mlt_color_primaries, and more mlt_colorspaces along with functions:
mlt_image_color_trc_namemlt_image_color_trc_idmlt_image_colorspace_namemlt_image_colorspace_idmlt_image_color_pri_namemlt_image_color_pri_idcppcheck.luma transition.affine filter and transition.qtblend transition.avformat module.panner filter for 5.1 channel layout.avformat producer (regression in v7.30.0).kdenlivetitle producer.mask_apply filter with custom transition.input_chmask & output_chmask properties to mono filter.channel_mask property to LADSPA/LV2/VST2 filters.channel_mask to the volume filter.outline video filter.% in the name in qimage producer.decklink consumer.& not decoded to & in the xml producer.avformat module.ladspa module without JACK as dependency.jackrack and ladspa modules.qtblend_mode.qtblend.avformat producer.opencv_tracker filter on cut playlist clips.avfilters that use it (e.g. avfilter.colorspace).qtext filter.avformat producer.melt now exits with 1 if the producer is invalid.melt.-progress2 option for melt.find_package().libgen.c and libgen.h for MSVC.You can download it from GitHub.
mlt_service_set_consumer() and `Mlt::Service::set_consumer().mlt_multitrack to not request a frame from a producer that is
both hidden and muted.avformat producer.yuva422p pixel format in avformat producer.MLT_AVFORMAT_HWACCEL & MLT_AVFORMAT_HWACCEL_DEVICE environment
variables to avformat producer.decklink module for recent hardware and drivers.colorspace and color_trc (including HDR) properties to the
decklink consumer.decklink consumer.decklink consumer.kdenlivetitle producer.movit module.movit module (requires ddennedy/movit fork).opencv_tracker filter should require multiple keyframes to be ready.rect <= 1 pixel in opencv_tracker filter.qtblend filter and transition.QT_QPA_PLATFORM=offscreen not working in qt and glaxnimate modules.qtblend filter.qtblend filters or transitions.sdl2 consumer on macOS.strobe filter not working with movit.timeremap link with movit.channels) missing on qglsl consumer
injected by the xml producer.You can download it from GitHub.
Mlt::Producer::set_creation_time() not exported on i686.Mlt::Properties::set(int64_t) symbol version.mlt_factory_init() on Linux/BSD may fail to initialize when
compiled with -DRELOCATABLE.mlt_property.c.
Previously, it was only done for 30000/1001 and 60000/1001 frame rates,
but 24000/1001 is especially important as well.xml-clip producer handles mismatching frame rate
between parent and child producers and facilites time-affecting links on
the child.mlt_image_full_range(const char *color_range) where any of the
following strings return true (1): full, jpeg, pc.xml-clip producer.in and out properties arenot serialized in the xml consumer.hslprimaries and hslrange filters to the plus module.gradientmap filter to the plus module.avfilter audio filters with FFmpeg 7.avformat.window_id property in consumer sdl2 by using
SDL_CreateWindowFrom(), especially important for embedding in GTK+ or Qt.vqm since Qt 6.decimals keyword to gpstext filter and move RAW keyword check.time_offset property handling in gpstext filter.subtitle_feed filter on producers with an in point > 0.luma transition.mix transition with consumer producer.freeze filter freezing too much.avfilter.fillborders with preview scaling.qtblend transition and filter.avfilter color distortion with mlt_image_rgb and mlt_image_rgba.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.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.src/swig.x264-medium preset to a higher quality.You can download it from GitHub.
This fixes a couple of major regressions in the previous version 7.26.0:
melt to render MLT XML with OpenGL effects from movit.Other fixes and changes:
composite transition and the sdl and ndi modules.xml producer.melt -query or melt -query links.transition property to the watermark filter. Now, it defaults
to using affine.affine transition argument to set rect property if supplied.You can download it from GitHub.
This release adds support for subtitles and LV2 & VST2 audio plugins.
Mlt::Service::profile().avformat producer:
r_frame_rate over avg_frame_rate.lowres if set too high.audio_index=all.variable_frame_rate incorrectly set true on 59.94 fps in Matroska.movit transitions with a non-movit filter on one of its inputs.glaxnimate producer off by one frame.dropshadow filter to the qt module.kdenlivetitle producer.jackrack module.av.declick audio filter on FFmpeg 7.subtitle filter and producer and subtitle_feed filter to the plus module.avformat consumer (new properties beginning with “subtitle.”).alang in the the avformat consumer.#gps_power keyword to the gpstext filter.kdenlivetitle producer.melt command line.-loglevel command line option to melt.
