What is a frame iterator?

How it works

• You choose frames per second.
• Each frame is a row of a view over the video.
• Models and embedding indexes run on the frame column.

What it is not

It is not an ffmpeg command you cron and never reattach to the parent video.

frame iterator: this, and the thing it is confused with

Where Pixeltable fits

Pixeltable’s view sets iterator=frame_iterator(video=Videos.video, fps=1). The frame column is what later columns read.

import pixeltable as pxt
from pixeltable.functions.video import frame_iterator

TableModel = pxt.model_base()

class Videos(TableModel, name='videos'):
    video: pxt.Video

class Frames(
    TableModel,
    name='frames',
    base=Videos,
    iterator=frame_iterator(video=Videos.video, fps=1),
):
    pass

Questions