Sequence returned <class 'aaf2.components.Sequence'> not implemented

[emcodem]

Feature Request

• [x] New Feature
• [ ] Change Existing Behavior

Description

This sequence from Avid MCP seems to contain something that the aaf parser currently is not prepared for: SEQUENCE 2.zip

Context

To reproduce the issue, just try to open the sequence in otioview, it should fail after some seconds. otioview "E:\Downloads\COMPLEX SEQUENCE 2.aaf"

  File "c:\users\emcodem\appdata\local\programs\python\python38\lib\site-packages\opentimelineio_contrib\adapters\advanced_authoring_format.py", line 130, in _find_timecode_mobs
  File "c:\users\emcodem\appdata\local\programs\python\python38\lib\site-packages\aaf2\components.py", line 204, in walk
NotImplementedError: Sequence returned <class 'aaf2.components.Sequence'> not implemented

[vvzen]

Hi all, I'm having the same issue here, with a different file (I'll check if I can share it and I'll update the comment eventually). I don't think it's coming from OTIO, it seems to be caused by the aaf2 module.

Here's the full traceback, for reference:

NotImplementedError                       Traceback (most recent call last)
<ipython-input-4-e11a35ebd11b> in <module>()
----> 1 timeline = otio.adapters.read_from_file(file_path)

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio/adapters/__init__.pyc in read_from_file(filepath, adapter_name, media_linker_name, media_linker_argument_map, **adapter_argument_map)
    142         media_linker_name=media_linker_name,
    143         media_linker_argument_map=media_linker_argument_map,
--> 144         **adapter_argument_map
    145     )
    146 

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio/adapters/adapter.pyc in read_from_file(self, filepath, media_linker_name, media_linker_argument_map, hook_function_argument_map, **adapter_argument_map)
    145                 "read_from_file",
    146                 filepath=filepath,
--> 147                 **adapter_argument_map
    148             )
    149 

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio/plugins/python_plugin.pyc in _execute_function(self, func_name, **kwargs)
    172                 "Sorry, {} doesn't support {}.".format(self.name, func_name)
    173             )
--> 174         return (getattr(self.module(), func_name)(**kwargs))

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in read_from_file(filepath, simplify, transcribe_log)
   1149 
   1150         # Transcribe just the top-level mobs
-> 1151         result = _transcribe(top, parents=list(), edit_rate=None)
   1152 
   1153     # AAF is typically more deeply nested than OTIO.

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _transcribe(item, parents, edit_rate, indent)
    564         result = otio.schema.SerializableCollection()
    565         for child in item:
--> 566             result.append(_transcribe(child, parents + [item], edit_rate, indent + 2))
    567     else:
    568         # For everything else, we just ignore it.

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _transcribe(item, parents, edit_rate, indent)
    249 
    250         for slot in item.slots:
--> 251             track = _transcribe(slot, parents + [item], edit_rate, indent + 2)
    252             _add_child(result.tracks, track, slot)
    253 

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _transcribe(item, parents, edit_rate, indent)
    450         result = otio.schema.Track()
    451 
--> 452         child = _transcribe(item.segment, parents + [item], edit_rate, indent + 2)
    453 
    454         _add_child(result, child, item.segment)

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _transcribe(item, parents, edit_rate, indent)
    427 
    428         for slot in item.slots:
--> 429             child = _transcribe(slot, parents + [item], edit_rate, indent + 2)
    430             _add_child(result, child, slot)
    431 

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _transcribe(item, parents, edit_rate, indent)
    436 
    437         for component in item.components:
--> 438             child = _transcribe(component, parents + [item], edit_rate, indent + 2)
    439             _add_child(result, child, component)
    440 

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _transcribe(item, parents, edit_rate, indent)
    443         _transcribe_log(msg, indent)
    444         result = _transcribe_operation_group(item, parents, metadata,
--> 445                                              edit_rate, indent + 2)
    446 
    447     elif isinstance(item, aaf2.mobslots.TimelineMobSlot):

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _transcribe_operation_group(item, parents, metadata, edit_rate, indent)
    891 
    892     for segment in item.getvalue("InputSegments"):
--> 893         child = _transcribe(segment, parents + [item], edit_rate, indent)
    894         if child:
    895             _add_child(result, child, segment)

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _transcribe(item, parents, edit_rate, indent)
    264 
    265         # Evidently the last mob is the one with the timecode
--> 266         mobs = _find_timecode_mobs(item)
    267 
    268         # Get the Timecode start and length values

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/opentimelineio_contrib/adapters/advanced_authoring_format.pyc in _find_timecode_mobs(item)
    132     mobs = [item.mob]
    133 
--> 134     for c in item.walk():
    135         if isinstance(c, aaf2.components.SourceClip):
    136             mob = c.mob

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/aaf2/components.pyc in walk(self)
    188         if isinstance(segment, SourceClip):
    189             yield segment
--> 190             for item in segment.walk():
    191                 yield item
    192 

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/aaf2/components.pyc in walk(self)
    188         if isinstance(segment, SourceClip):
    189             yield segment
--> 190             for item in segment.walk():
    191                 yield item
    192 

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/aaf2/components.pyc in walk(self)
    188         if isinstance(segment, SourceClip):
    189             yield segment
--> 190             for item in segment.walk():
    191                 yield item
    192 

/Users/vvzen/miniconda2/envs/otio/lib/python2.7/site-packages/aaf2/components.pyc in walk(self)
    204                     raise NotImplementedError("Sequence returned {} not "
    205                                               "implemented".format(
--> 206                                                   type(segment)))
    207 
    208         elif isinstance(segment, EssenceGroup):

NotImplementedError: Sequence returned <class 'aaf2.components.Sequence'> not implemented

[russellaugust]

Any headway made with this?

I'm on a macOS 10.14.6, python 3.10.9, otio 0.15.0 and pyaf2 1.6.0. Having the same issue.

I'm exporting test AAFs from Avid 2018.12.15. I've tried with/without edit protocol and with/without ProTools compatibility on AAF export. I've tried flattening multicams, minimizing as far down as one clip in one track. Tried both audio and video.

[reinecke]

Referring this over to https://github.com/OpenTimelineIO/otio-aaf-adapter - all new development on the AAF adapter is being done there.