NotImplementedError <class 'aaf2.components.Sequence'>

[will-riley]

Matchbox creates a working otio file from this aaf (ta_v1-3.aaf), unable to do the same using otioconvert.
Thx

$ uname -a 
Linux ike 6.6.52-gentoo #5 SMP PREEMPT_DYNAMIC Fri Mar 21 17:57:48 PDT 2025 x86_64 Intel(R) Core(TM) i9-9900KS CPU @ 4.00GHz GenuineIntel GNU/Linux

$ cat OTIO_VERSION.json
{"version": ["0", "18", "0"]}(venv) 

$ otioconvert -i ta_v1-3.aaf -o ta_v1-3.aaf.otio
Found more than one Source Clip (2) for sourceClipComposition case. This is unexpected
Traceback (most recent call last):
  File "/home/user1/virtualenv/OpenTimelineIO/venv/bin/otioconvert", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/opentimelineio/console/otioconvert.py", line 238, in main
    result_tl = otio.adapters.read_from_file(
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/opentimelineio/adapters/__init__.py", line 143, in read_from_file
    return adapter.read_from_file(
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/opentimelineio/adapters/adapter.py", line 116, in read_from_file
    result = self._execute_function(
             ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/opentimelineio/plugins/python_plugin.py", line 144, in _execute_function
    return (getattr(self.module(), func_name)(**kwargs))
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 1574, in read_from_file
    result = _transcribe(mobs_to_transcribe, parents=list(), edit_rate=None)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 821, in _transcribe
    result.append(_transcribe(child, parents + [item], edit_rate, indent + 2))
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 413, in _transcribe
    track = _transcribe(slot, parents + [item], edit_rate, indent + 2)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 639, in _transcribe
    child = _transcribe(item.segment, parents + [item], edit_rate, indent + 2)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 605, in _transcribe
    child = _transcribe(slot, parents + [item], edit_rate, indent + 2)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 625, in _transcribe
    child = _transcribe(component, parents + [item], edit_rate, indent + 2)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 631, in _transcribe
    result = _transcribe_operation_group(item, parents, metadata,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 1148, in _transcribe_operation_group
    child = _transcribe(segment, parents + [item], edit_rate, indent)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 625, in _transcribe
    child = _transcribe(component, parents + [item], edit_rate, indent + 2)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 508, in _transcribe
    mastermob_child = _transcribe(mastermob, list(), edit_rate, indent)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 413, in _transcribe
    track = _transcribe(slot, parents + [item], edit_rate, indent + 2)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 639, in _transcribe
    child = _transcribe(item.segment, parents + [item], edit_rate, indent + 2)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 442, in _transcribe
    mobs = _find_timecode_mobs(item)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/otio_aaf_adapter/adapters/advanced_authoring_format.py", line 270, in _find_timecode_mobs
    for c in item.walk():
             ^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/aaf2/components.py", line 213, in walk
    for item in clip.walk():
                ^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/aaf2/components.py", line 213, in walk
    for item in clip.walk():
                ^^^^^^^^^^^
  File "/home/user1/virtualenv/OpenTimelineIO/venv/lib/python3.12/site-packages/aaf2/components.py", line 216, in walk
    raise NotImplementedError("Sequence returned {} not "
NotImplementedError: Sequence returned <class 'aaf2.components.Sequence'> not implemented

[timlehr]

@will-riley, sorry for the late reply, just saw this now. We're about to put out a major refactor of the AAF reader with #44, maybe you can try the new code, see if you still experience the issue?