Beta 18 - November 2025

Summary

This release includes a large number of fixes as well as schema improvements.

Big Changes

• Add enabled flag to Effect schema
• Drop Imath 2 support
• Remove vfx platform 2020 support from README.md, add 2024 and 2025
• Added a Color primitive structure for assigning colors to elements (this is not meant to represent pixel colors)
• Per-Track and Per-Clip Color
• Added --remove-effects feature to otiotool
• Remove OTIOView from the core library (The old python library is now stored here - though we encourage people to use Raven instead)
• Add support for C++ symbol visibility
• Document C++ API with Doxygen markup

What's Changed

• Initialize v0.18 by @reinecke in #1775
• #1680 fix segmentation fault when appending None by @semagnum in #1778
• Second draft of file bundle adapter docs. by @ssteinbach in #1709
• Fix #1347 documentation on time ranges by @semagnum in #1780
• #1677 otiotool verify ranges by @semagnum in #1779
• Disable 32-bit Python builds by @darbyjohnston in #1789
• Updated Effect schema with enabled flag by @fschleich in #1798
• Deprecate c++ demangling. by @furby-tm in #1800
• Fix for find_children() with stacks #2 by @darbyjohnston in #1766
• Add Python build for Linux on ARM architecture by @tomviner in #1795
• Added a list of applications integrating OTIO by @reinecke in #1812
• Improve handling of rates when converting to timecode strings by @jminor in #1477
• Add effect and marker initialization to Clip by @peter-targett in #1808
• Add AnyDictionary and AnyVector support for V2d and Box2d by @peter-targett in #1811
• Fix typos by @rex4539 in #1821
• Fix CI issue with gcov by @darbyjohnston in #1823
• Revert whitespace changes to otio-serialized-schema.md by @reinecke in #1824
• Fix comments about header dependencies by @darbyjohnston in #1826
• Update GH actions to fix CI builds by @darbyjohnston in #1828
• Replace backticks with quotes in pypi-publish GHA workflow by @JeanChristopheMorinPerso in #1837
• Bump actions/setup-python from 4.3.0 to 5.4.0 by @dependabot[bot] in #1829
• Bump actions/checkout from 3 to 4 by @dependabot[bot] in #1731
• Add convenience functions by @darbyjohnston in #1825
• Update README.md by @jminor in #1851
• Drop Imath2 support and modernize Imath includes by @jlskuz in #1852
• Added support for custom adapter hooks by @timlehr in #1801
• V2d serialization fix by @rogernelson in #1861
• Allow build system to use rapidjson from the system by @jlskuz in #1859
• Fix bug w/ url_utils.filepath_from_url + rel paths with a single "/" by @ssteinbach in #1862
• Don't fallback to Imath from src/deps by @jlskuz in #1864
• Simplify the C++ example by @darbyjohnston in #1867
• Add SOVERSION for the C++ libraries by @darbyjohnston in #1860
• Add Doxygen comments to opentime by @darbyjohnston in #1866
• Bump src/deps/Imath from b90cc01 to f65b01c by @dependabot[bot] in #1858
• Drop dead OTIO_IMATH_LIBS cmake option by @jlskuz in #1874
• Add Doxygen comments to opentimelineio by @darbyjohnston in #1868
• Remove unused path from the C++ install by @darbyjohnston in #1882
• Remove vfx platform 2020 support from README.md, add 2024 and 2025, note that 3.12 is also supported by @ssteinbach in #1883
• Workflow fix, exclude cannot be empty by @darbyjohnston in #1898
• Bump minimum OS X deployment version to 10.15 by @darbyjohnston in #1893
• fixed image bounds error status null bug + test case by @cato-o in #1896
• moved find_clips function to superclass and added test case by @cato-o in #1902
• Add Kdenlive to ADOPTERS by @frdbr in #1914
• Per-Track and Per-Clip Color by @semagnum in #1887
• Fix color deserialization, add schema by @semagnum in #1915
• Add version header. by @peter-targett in #1907
• Added --remove-effects feature to otiotool. by @jminor in #1912
• otiotool docs by @jminor in #1921
• Hide our custom fabs() function by @darbyjohnston in #1929
• Temporarily disable check_manifest on MinGW by @darbyjohnston in #1935
• Reduce the number of dependabot C++ checks by @darbyjohnston in #1939
• Fix various typos by @luzpaz in #1936
• Update Imath to v3.2.1 by @darbyjohnston in #1941
• Update rapidjson to latest by @darbyjohnston in #1943
• Update pybind11 to v2.13.6 by @darbyjohnston in #1942
• Remove the last remains of opentimelineio_contrib by @apetrynet in #1946
• Fixed transparent Color constant. by @jminor in #1949
• Remove OtioView from OTIO-Core by @apetrynet in #1944
• Update CI from macOS-13 to macOS-14 by @jminor in #1954
• Initialize test_v2d.py variables by @darbyjohnston in #1955
• Export C++ symbols part 2 by @darbyjohnston in #1953
• add support for python 3.13 (vfx platform 2026) by @rogernelson in #1957
• Fixes for the C++ exports by @darbyjohnston in #1959
• Reduce dependabot frequency by @darbyjohnston in #1958
• Reorder initializers to silence a warning. by @jminor in #1960
• Initialize Python Imath values by @darbyjohnston in #1956
• Fixes for C++ examples by @darbyjohnston in #1967
• Update README to reflect release status by @meshula in #1964
• 0.18.0 Release by @reinecke in #1969

New Contributors

• @semagnum made their first contribution in #1778
• @fschleich made their first contribution in #1798
• @furby-tm made their first contribution in #1800
• @tomviner made their first contribution in #1795
• @rex4539 made their first contribution in #1821
• @cato-o made their first contribution in #1896
• @frdbr made their first contribution in #1914
• @luzpaz made their first contribution in #1936

Full Changelog: v0.17.0...v0.18.0