05_text_data.py

'''
This example shows how to draw text data.
'''

# Rekall imports
from rekall import Interval, IntervalSet, IntervalSetMapping, Bounds3D

# Vgrid imports
from vgrid import VGridSpec, VideoMetadata, VideoBlockFormat, SpatialType_Caption


# This example assumes a 1920x1080 video at 59.94 FPS, with 20,696 frames.
# You should modify it for your own examples.
video_metadata = [
    VideoMetadata('http://localhost:8000/test.mp4', 0, 59.94, 20696, 1920, 1080)
]

ism = IntervalSetMapping({
    0: IntervalSet([
        Interval(
            Bounds3D(0, 10),
            {
                'spatial_type': SpatialType_Caption('this is caption text'),
                'metadata': {}
            }
        ),
        Interval(
            Bounds3D(10, 20),
            {
                'spatial_type': SpatialType_Caption('this is more caption text'),
                'metadata': {}
            }
        ),
        Interval(
            Bounds3D(20, 30),
            {
                'spatial_type': SpatialType_Caption(
                    '>> this caption text will appear on a new line'
                ),
                'metadata': {}
            }
        )
    ])
})

vgrid_spec = VGridSpec(
    video_meta = video_metadata,
    vis_format = VideoBlockFormat(imaps = [
        ('bboxes', ism)
    ])
)

# Pass this to your Javascript application somehow
json_for_js = vgrid_spec.to_json_compressed()