mlt-6.22.0

[Bruce Dubbs]

New minor version.

[Douglas R. Reno]

Version 6.22.0 - July 30, 2020

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.
  * 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.
  * Moved some services from gtk2 module to new gdk module:
    - gtkrescale filter
	- pango producer
	- pixbuf producer
  * Deprecated the gtk2 module and no longer enabled by default.
  * 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.
  * Deprecated the linsys (DVEO SDI) module.
  * 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 (sw)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.

[Douglas R. Reno]

Fixed at r23446