[Datumaro] VOC export does not export annotations

Dumping the annotations as Pascal VOC Zip results in a zip file with xml files that look like that:

<annotation>
    <folder></folder>
    <filename>888.jpg</filename>
    <path></path>
    <source>
        <database>Unknown</database>
    </source>
    <size>
        <width>1920</width>
        <height>1080</height>
        <depth>3</depth>
    </size>
    <segmented>0</segmented>
    <object>
        <name>Blub</name>
        <pose>Unspecified</pose>
        <truncated>0</truncated>
        <difficult>0</difficult>
        <bndbox>
            <xmin>1484.83984375</xmin>
            <ymin>496.052734375</ymin>
            <xmax>1510.2798442840576</xmax>
            <ymax>518.972734451294</ymax>
        </bndbox>
    </object>
</annotation>

Exporting the dataset as pascal voc results in xml files that look like:

<annotation>
  <folder></folder>
  <filename>0.jpg</filename>
  <size>
    <width>1920</width>
    <height>1080</height>
    <depth>3</depth>
  </size>
</annotation>

I tested it on a task containing a single image with one bounding box as annotation.

Tested on Commit: 310ee37b

I am grateful for any help regarding this problem.

[zhiltsov-max]

I suppose the issue with empty annotations is that Blub is not a VOC label, so it was skipped. What would be the expected output? The same as in annotations export?

[zhiltsov-max]

@nmanovic, it looks like another problem