time.monotonic() is always available

av/container/core.pxd

@@ -14,7 +14,6 @@ ctypedef struct timeout_info:
 
 
 cdef class Container:
-
     cdef readonly bint writeable
     cdef lib.AVFormatContext *ptr
 

av/container/core.pyi

@@ -100,8 +100,6 @@ class Container:
         exc_val: BaseException | None,
         exc_tb: TracebackType | None,
     ) -> None: ...
-    def set_timeout(self, timeout: Real | None) -> None: ...
-    def start_timeout(self) -> None: ...
     def chapters(self) -> list[Chapter]: ...
     def set_chapters(self, chapters: list[Chapter]) -> None: ...
 

av/container/core.pyx

@@ -28,20 +28,14 @@ from av.logging import Capture as LogCapture
 
 cdef object _cinit_sentinel = object()
 
-
-# We want to use the monotonic clock if it is available.
-cdef object clock = getattr(time, "monotonic", time.time)
-
-cdef int interrupt_cb (void *p) noexcept nogil:
+cdef int interrupt_cb(void *p) noexcept nogil:
     cdef timeout_info info = dereference(<timeout_info*> p)
     if info.timeout < 0:  # timeout < 0 means no timeout
         return 0
 
     cdef double current_time
     with gil:
-        current_time = clock()
-
-        # Check if the clock has been changed.
+        current_time = time.monotonic()
         if current_time < info.start_time:
             # Raise this when we get back to Python.
             stash_exception((RuntimeError, RuntimeError("Clock has been changed to before timeout start"), None))
@@ -330,7 +324,7 @@ cdef class Container:
             self.interrupt_callback_info.timeout = timeout
 
     cdef start_timeout(self):
-        self.interrupt_callback_info.start_time = clock()
+        self.interrupt_callback_info.start_time = time.monotonic()
 
     cdef _assert_open(self):
         if self.ptr == NULL: