Check the order of frames during import of a dataset in MOT format

[xiongda777]

My actions before raising this issue

• [ yes] Read/searched the docs
• [yes] Searched past issues

Expected Behaviour

export xml file of project

Current Behaviour

Error: Request failed with status code 500. "AssertionError\n".

Possible Solution

dont know

Steps to Reproduce (for bugs)

Context

Your Environment

• Git hash commit (git log -1):
• Docker version docker version (e.g. Docker 17.0.05):
• Are you using Docker Swarm or Kubernetes?
• Operating System and version (e.g. Linux, Windows, MacOS):
• Code example or link to GitHub repo or gist to reproduce problem:
• Other diagnostic information / logs:
  Logs from `cvat` container

I get docker logs cvat as follow:

Traceback (most recent call last):
File "/opt/venv/lib/python3.8/site-packages/rq/worker.py", line 936, in perform_job
rv = job.perform()
File "/opt/venv/lib/python3.8/site-packages/rq/job.py", line 684, in perform
self._result = self._execute()
File "/opt/venv/lib/python3.8/site-packages/rq/job.py", line 690, in _execute
return self.func(*self.args, **self.kwargs)
File "/home/django/cvat/apps/dataset_manager/views.py", line 110, in export_project_annotations
return export(dst_format, project_id=project_id, server_url=server_url, save_images=False)
File "/home/django/cvat/apps/dataset_manager/views.py", line 74, in export
export_fn(db_instance.id, temp_file, dst_format,
File "/home/django/cvat/apps/dataset_manager/project.py", line 32, in export_project
project.export(f, exporter, host=server_url, save_images=save_images)
File "/home/django/cvat/apps/dataset_manager/project.py", line 130, in export
exporter(dst_file, project_data, **options)
File "/home/django/cvat/apps/dataset_manager/formats/registry.py", line 37, in call
f_or_cls(*args, **kwargs)
File "/home/django/cvat/apps/dataset_manager/formats/cvat.py", line 1080, in _export_images
_export_project(dst_file, instance_data,
File "/home/django/cvat/apps/dataset_manager/formats/cvat.py", line 1057, in _export_project
dump_project_anno(f, project_data, anno_callback)
File "/home/django/cvat/apps/dataset_manager/formats/cvat.py", line 1024, in dump_project_anno
callback(dumper, project_data)
File "/home/django/cvat/apps/dataset_manager/formats/cvat.py", line 596, in dump_as_cvat_annotation
for frame_annotation in annotations.group_by_frame(include_empty=True):
File "/home/django/cvat/apps/dataset_manager/bindings.py", line 839, in group_by_frame
for shape in sorted(anno_manager.to_shapes(task.data.size),
File "/home/django/cvat/apps/dataset_manager/annotation.py", line 162, in to_shapes
return shapes + tracks.to_shapes(end_frame)
File "/home/django/cvat/apps/dataset_manager/annotation.py", line 364, in to_shapes
for shape in TrackManager.get_interpolated_shapes(track, 0, end_frame):
File "/home/django/cvat/apps/dataset_manager/annotation.py", line 725, in get_interpolated_shapes
assert shape["frame"] > curr_frame
AssertionError

I want to know AssertionError mean, and what is my problem?

[nmanovic]

@xiongda777 , which CVAT version are you using?

[bsekachev]

assert shape["frame"] > curr_frame

Old problem we meet time to time, but were not able to reproduce so far ... :(

#500 #610 #1081 #2814 #3360

[CaoHoangTung]

For me, I encountered the error after importing the annotations (MOT1.1 format) with duplicated track ids in some frames. Importing was okay for the first time, but the error occurred when I tried to export the dataset.

There seems to be no validating mechanism for duplicated track ids while importing?

[zhiltsov-max]

I was able to reproduce the problem using the following annotations in the MOT format. Right, there is no check on import for repeated frame ids in track shapes, so it is possible that some invalid tracks are in the DB. Export of such tracks fails.

mot_task_with_repeated_track_shapes.zip

@CaoHoangTung, could you please say if the duplications were for a reason or occasional? Do you see any chances for such duplications to be correct annotations?

[F10JM]

I have the same issue, but i didnt import in MOT format i imported in CVAT 1.1 format and when exporting i got this error:
Error: Request failed with status code 500. "AssertionError: 748 > 748. Track id: 2223761\n".

[zhiltsov-max]

Related: #6779