AcademySoftwareFoundation · reinecke · Nov 6, 2025 · Nov 6, 2025
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
@@ -6,7 +6,7 @@ name: OpenTimelineIO
 # for configuring which build will be a C++ coverage build / coverage report
 env:
   GH_COV_PY: "3.10"
-  GH_COV_OS: ubuntu-latest
+  GH_COV_OS: ubuntu-24.04
   GH_DEPENDABOT: dependabot
 
 on:
@@ -24,15 +24,15 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-14, macos-latest]
+        os: [ubuntu-24.04, windows-2025, macos-14, macos-15]
         # Unfortunately the CMake test target is OS dependent so we set it as
         # a variable here.
         include:
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             OTIO_TEST_TARGET: test
-          - os: windows-latest
+          - os: windows-2025
             OTIO_TEST_TARGET: RUN_TESTS
-          - os: macos-latest
+          - os: macos-15
             OTIO_TEST_TARGET: test
           - os: macos-14
             OTIO_TEST_TARGET: test
@@ -92,16 +92,16 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-14, macos-latest]
+        os: [ubuntu-24.04, windows-2025, macos-14, macos-15]
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         include:
-          - { os: ubuntu-latest, shell: bash }
-          - { os: macos-latest, shell: bash }
+          - { os: ubuntu-24.04, shell: bash }
+          - { os: macos-15, shell: bash }
           - { os: macos-14, shell: bash }
-          - { os: windows-latest, shell: pwsh }
-          - { os: windows-latest, shell: msys2, python-version: "mingw64" }
+          - { os: windows-2025, shell: pwsh }
+          - { os: windows-2025, shell: msys2, python-version: "mingw64" }
         exclude:
-          - { os: macos-latest, python-version: 3.9 }
+          - { os: macos-15, python-version: 3.9 }
 
     defaults:
       run:
@@ -173,16 +173,16 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
+            ubuntu-24.04,
             ubuntu-24.04-arm,
-            windows-latest,
+            windows-2025,
             macos-14,
-            macos-latest,
+            macos-15,
           ]
         python-build: ["cp39", "cp310", "cp311", "cp312", "cp313"]
         #exclude:
         #   none currently
-        #   - { os: macos-latest, python-build: 'cp37' }
+        #   - { os: macos-15, python-build: 'cp37' }
     steps:
       - uses: actions/checkout@v4
 
@@ -205,7 +205,7 @@ jobs:
 
   package_sdist:
     needs: py_build_test
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
         with:

diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
@@ -16,6 +16,7 @@ If you know of anyone missing from this list, please contact us: https://lists.a
 * Darwyn Peachey ([peachey](https://github.com/peachey))
 * David Baraff ([davidbaraff](https://github.com/davidbaraff))
 * dgw ([dgw](https://github.com/dgw))
+* Dimitris Apostolou ([rex4539](https://github.com/rex4539))
 * Doug Halley ([douglascomet](https://github.com/douglascomet))
 * Ed Caspersen ([repsac](https://github.com/repsac))
 * Emile Labrosse ([elabrosseRodeofx](https://github.com/elabrosseRodeofx))
@@ -24,8 +25,10 @@ If you know of anyone missing from this list, please contact us: https://lists.a
 * Eric Reinecke ([reinecke](https://github.com/reinecke))
 * Evan Blaudy ([EvanBldy](https://github.com/EvanBldy))
 * Flavian Liger ([flavienliger](https://github.com/flavienliger))
+* Florian Schleich ([fschleich](https://github.com/fschleich))
 * Fredrik Brännbacka ([smaragden](https://github.com/smaragden))
 * Freeson Wang ([freesonluxo](https://github.com/freesonluxo))
+* furby™ ([furby-tm](https://github.com/furby-tm))
 * Félix Bourbonnais ([BadSingleton](https://github.com/BadSingleton))
 * Félix David ([Tilix4](https://github.com/Tilix4))
 * Gonzalo Garramuño ([ggarra13](https://github.com/ggarra13))
@@ -63,16 +66,19 @@ If you know of anyone missing from this list, please contact us: https://lists.a
 * Sergio Rojas ([hisergiorojas](https://github.com/hisergiorojas))
 * Shahbaz Khan ([shahbazk8194](https://github.com/shahbazk8194))
 * Simran Spiller ([Simran-B](https://github.com/Simran-B))
+* Spencer Magnusson ([semagnum](https://github.com/semagnum))
 * Stefan Schulze ([stefanschulze](https://github.com/stefanschulze))
 * Stephan Steinbach ([ssteinbach](https://github.com/ssteinbach))
 * Stéphane Deverly ([gplsteph](https://github.com/gplsteph))
 * Thibault Saunier ([thiblahute](https://github.com/thiblahute))
 * Thierry Dervieux-Lecocq ([tdervieux](https://github.com/tdervieux))
 * ThomasWilshaw ([ThomasWilshaw](https://github.com/ThomasWilshaw))
 * Tim Lehr ([timlehr](https://github.com/timlehr))
+* Tom V ([tomviner](https://github.com/tomviner))
 * Troy James Sobotka ([sobotka](https://github.com/sobotka))
 * Tuan Truong ([tuan-huy-truong](https://github.com/tuan-huy-truong))
 * Utsab Saha ([utsab](https://github.com/utsab))
 * Valerio Viperino ([vvzen](https://github.com/vvzen))
 * Vincent Pinon ([vpinon](https://github.com/vpinon))
-* Visaj Nirav Shah ([visajshah](https://github.com/visajshah))
+* Visaj Nirav Shah ([visajshah](https://github.com/visajshah))
+* Yingjie Wang ([cato-o](https://github.com/cato-o))
diff --git a/setup.py b/setup.py
@@ -218,7 +218,7 @@ def cmake_install(self):
 
 # Metadata that gets stamped into the __init__ files during the build phase.
 PROJECT_METADATA = {
-    "version": "0.18.0.dev1",
+    "version": "0.18.0",
     "author": 'Contributors to the OpenTimelineIO project',
     "author_email": '[email protected]',
     "license": 'Apache 2.0 License',

diff --git a/src/opentime/export.h b/src/opentime/export.h
@@ -6,61 +6,63 @@
 // For an explanation of how these export defines work, see:
 // https://github.com/PixarAnimationStudios/OpenUSD/blob/dev/pxr/base/arch/export.h
 #if defined(_WINDOWS)
-#   if defined(__GNUC__) && __GNUC__ >= 4 || defined(__clang__)
-#       define OPENTIMELINEIO_EXPORT __attribute__((dllexport))
-#       define OPENTIMELINEIO_IMPORT __attribute__((dllimport))
-#       define OPENTIMELINEIO_HIDDEN
-#       define OPENTIMELINEIO_EXPORT_TYPE
-#       define OPENTIMELINEIO_IMPORT_TYPE
-#   else
-#       define OPENTIMELINEIO_EXPORT __declspec(dllexport)
-#       define OPENTIMELINEIO_IMPORT __declspec(dllimport)
-#       define OPENTIMELINEIO_HIDDEN
-#       define OPENTIMELINEIO_EXPORT_TYPE
-#       define OPENTIMELINEIO_IMPORT_TYPE
-#   endif
+#    if defined(__GNUC__) && __GNUC__ >= 4 || defined(__clang__)
+#        define OPENTIMELINEIO_EXPORT __attribute__((dllexport))
+#        define OPENTIMELINEIO_IMPORT __attribute__((dllimport))
+#        define OPENTIMELINEIO_HIDDEN
+#        define OPENTIMELINEIO_EXPORT_TYPE
+#        define OPENTIMELINEIO_IMPORT_TYPE
+#    else
+#        define OPENTIMELINEIO_EXPORT __declspec(dllexport)
+#        define OPENTIMELINEIO_IMPORT __declspec(dllimport)
+#        define OPENTIMELINEIO_HIDDEN
+#        define OPENTIMELINEIO_EXPORT_TYPE
+#        define OPENTIMELINEIO_IMPORT_TYPE
+#    endif
 #elif defined(__GNUC__) && __GNUC__ >= 4 || defined(__clang__)
-#   define OPENTIMELINEIO_EXPORT __attribute__((visibility("default")))
-#   define OPENTIMELINEIO_IMPORT
-#   define OPENTIMELINEIO_HIDDEN __attribute__((visibility("hidden")))
-#   if defined(__clang__)
-#       define OPENTIMELINEIO_EXPORT_TYPE __attribute__((type_visibility("default")))
-#   else
-#       define OPENTIMELINEIO_EXPORT_TYPE __attribute__((visibility("default")))
-#   endif
-#   define OPENTIMELINEIO_IMPORT_TYPE
+#    define OPENTIMELINEIO_EXPORT __attribute__((visibility("default")))
+#    define OPENTIMELINEIO_IMPORT
+#    define OPENTIMELINEIO_HIDDEN __attribute__((visibility("hidden")))
+#    if defined(__clang__)
+#        define OPENTIMELINEIO_EXPORT_TYPE                                     \
+            __attribute__((type_visibility("default")))
+#    else
+#        define OPENTIMELINEIO_EXPORT_TYPE                                     \
+            __attribute__((visibility("default")))
+#    endif
+#    define OPENTIMELINEIO_IMPORT_TYPE
 #else
-#   define OPENTIMELINEIO_EXPORT
-#   define OPENTIMELINEIO_IMPORT
-#   define OPENTIMELINEIO_HIDDEN
-#   define OPENTIMELINEIO_EXPORT_TYPE
-#   define OPENTIMELINEIO_IMPORT_TYPE
+#    define OPENTIMELINEIO_EXPORT
+#    define OPENTIMELINEIO_IMPORT
+#    define OPENTIMELINEIO_HIDDEN
+#    define OPENTIMELINEIO_EXPORT_TYPE
+#    define OPENTIMELINEIO_IMPORT_TYPE
 #endif
 #define OPENTIMELINEIO_EXPORT_TEMPLATE(type, ...)
-#define OPENTIMELINEIO_IMPORT_TEMPLATE(type, ...) \
+#define OPENTIMELINEIO_IMPORT_TEMPLATE(type, ...)                              \
     extern template type OPENTIMELINEIO_IMPORT __VA_ARGS__
 
 #if defined(OPENTIME_STATIC)
-#   define OPENTIME_API
-#   define OPENTIME_API_TYPE
-#   define OPENTIME_API_TEMPLATE_CLASS(...)
-#   define OPENTIME_API_TEMPLATE_STRUCT(...)
-#   define OPENTIME_LOCAL
+#    define OPENTIME_API
+#    define OPENTIME_API_TYPE
+#    define OPENTIME_API_TEMPLATE_CLASS(...)
+#    define OPENTIME_API_TEMPLATE_STRUCT(...)
+#    define OPENTIME_LOCAL
 #else
-#   if defined(OPENTIME_EXPORTS)
-#       define OPENTIME_API OPENTIMELINEIO_EXPORT
-#       define OPENTIME_API_TYPE OPENTIMELINEIO_EXPORT_TYPE
-#       define OPENTIME_API_TEMPLATE_CLASS(...) \
+#    if defined(OPENTIME_EXPORTS)
+#        define OPENTIME_API OPENTIMELINEIO_EXPORT
+#        define OPENTIME_API_TYPE OPENTIMELINEIO_EXPORT_TYPE
+#        define OPENTIME_API_TEMPLATE_CLASS(...)                               \
             OPENTIMELINEIO_EXPORT_TEMPLATE(class, __VA_ARGS__)
-#       define OPENTIME_API_TEMPLATE_STRUCT(...) \
+#        define OPENTIME_API_TEMPLATE_STRUCT(...)                              \
             OPENTIMELINEIO_EXPORT_TEMPLATE(struct, __VA_ARGS__)
-#   else
-#       define OPENTIME_API OPENTIMELINEIO_IMPORT
-#       define OPENTIME_API_TYPE OPENTIMELINEIO_IMPORT_TYPE
-#       define OPENTIME_API_TEMPLATE_CLASS(...) \
+#    else
+#        define OPENTIME_API OPENTIMELINEIO_IMPORT
+#        define OPENTIME_API_TYPE OPENTIMELINEIO_IMPORT_TYPE
+#        define OPENTIME_API_TEMPLATE_CLASS(...)                               \
             OPENTIMELINEIO_IMPORT_TEMPLATE(class, __VA_ARGS__)
-#       define OPENTIME_API_TEMPLATE_STRUCT(...) \
+#        define OPENTIME_API_TEMPLATE_STRUCT(...)                              \
             OPENTIMELINEIO_IMPORT_TEMPLATE(struct, __VA_ARGS__)
-#   endif
-#   define OPENTIME_LOCAL OPENTIMELINEIO_HIDDEN
+#    endif
+#    define OPENTIME_LOCAL OPENTIMELINEIO_HIDDEN
 #endif
diff --git a/src/opentime/rationalTime.cpp b/src/opentime/rationalTime.cpp
@@ -32,8 +32,7 @@ static constexpr std::array<double, 11> smpte_timecode_rates{
       48.0,
       50.0,
       60000.0 / 1001.0,
-      60.0
-    }
+      60.0 }
 };
 
 // deprecated in favor of `is_smpte_timecode_rate`

diff --git a/src/opentime/timeRange.h b/src/opentime/timeRange.h
@@ -43,9 +43,7 @@ class OPENTIME_API_TYPE TimeRange
     {}
 
     /// @brief Construct a new time range with the given start time and duration.
-    constexpr TimeRange(
-        RationalTime start_time,
-        RationalTime duration) noexcept
+    constexpr TimeRange(RationalTime start_time, RationalTime duration) noexcept
         : _start_time{ start_time }
         , _duration{ duration }
     {}
@@ -65,7 +63,8 @@ class OPENTIME_API_TYPE TimeRange
     /// duration is invalid, or if the duration is less than zero.
     bool is_invalid_range() const noexcept
     {
-        return _start_time.is_invalid_time() || _duration.is_invalid_time() || _duration.value() < 0.0;
+        return _start_time.is_invalid_time() || _duration.is_invalid_time()
+               || _duration.value() < 0.0;
     }
 
     /// @brief Returns true if the time range is valid.
@@ -75,7 +74,8 @@ class OPENTIME_API_TYPE TimeRange
     /// zero.
     bool is_valid_range() const noexcept
     {
-        return _start_time.is_valid_time() && _duration.is_valid_time() && _duration.value() >= 0.0;
+        return _start_time.is_valid_time() && _duration.is_valid_time()
+               && _duration.value() >= 0.0;
     }
 
     /// @brief Returns the start time.

diff --git a/src/opentimelineio/CORE_VERSION_MAP.cpp b/src/opentimelineio/CORE_VERSION_MAP.cpp
@@ -142,7 +142,7 @@ const label_to_schema_version_map CORE_VERSION_MAP{
           { "Transition", 1 },
           { "UnknownSchema", 1 },
       } },
-    { "0.18.0.dev1",
+    { "0.18.0",
       {
           { "Adapter", 1 },
           { "Clip", 2 },

diff --git a/src/opentimelineio/clip.cpp b/src/opentimelineio/clip.cpp
@@ -17,7 +17,8 @@ Clip::Clip(
     std::vector<Marker*> const&     markers,
     std::string const&              active_media_reference_key,
     std::optional<Color> const&     color)
-    : Parent{ name, source_range, metadata, effects, markers, /*enabled*/ true, color }
+    : Parent{ name,    source_range,     metadata, effects,
+              markers, /*enabled*/ true, color }
     , _active_media_reference_key(active_media_reference_key)
 {
     set_media_reference(media_reference);
@@ -191,12 +192,12 @@ std::optional<IMATH_NAMESPACE::Box2d>
 Clip::available_image_bounds(ErrorStatus* error_status) const
 {
     auto active_media = media_reference();
-    
+
     //this code path most likely never runs since a null or empty media_reference gets
     //replaced with a placeholder value when instantiated
     if (!active_media)
     {
-        if(error_status)
+        if (error_status)
         {
             *error_status = ErrorStatus(
                 ErrorStatus::CANNOT_COMPUTE_BOUNDS,
@@ -209,7 +210,7 @@ Clip::available_image_bounds(ErrorStatus* error_status) const
 
     if (!active_media->available_image_bounds())
     {
-        if(error_status)
+        if (error_status)
         {
             *error_status = ErrorStatus(
                 ErrorStatus::CANNOT_COMPUTE_BOUNDS,

diff --git a/src/opentimelineio/clip.h b/src/opentimelineio/clip.h
@@ -44,10 +44,10 @@ class OTIO_API_TYPE Clip : public Item
         MediaReference*                 media_reference = nullptr,
         std::optional<TimeRange> const& source_range    = std::nullopt,
         AnyDictionary const&            metadata        = AnyDictionary(),
-        std::vector<Effect*> const& effects             = std::vector<Effect*>(),
-        std::vector<Marker*> const& markers             = std::vector<Marker*>(),
-        std::string const& active_media_reference_key   = default_media_key,
-        std::optional<Color> const&     color           = std::nullopt);
+        std::vector<Effect*> const&     effects       = std::vector<Effect*>(),
+        std::vector<Marker*> const&     markers       = std::vector<Marker*>(),
+        std::string const& active_media_reference_key = default_media_key,
+        std::optional<Color> const& color             = std::nullopt);
 
     /// @name Media References
     ///@{
-Original file line number
+Diff line change
@@ Expand Up / @@ -32,8 +32,7 @@ static constexpr std::array<double, 11> smpte_timecode_rates{ @@
 .0,
 .0,
 .0 / 1001.0,
-.0
-        }
+.0 }
     };
     // deprecated in favor of `is_smpte_timecode_rate`
@@ Expand Down @@