napari-video
Napari plugin for working with videos.
Relies on pyvideoreader as a backend which itself uses opencv for reading videos.
Installation
pip install napari[all] napari_video
Usage
From a terminal:
napari video.avi
Or from within python:
import napari
from napari_video.napari_video import VideoReaderNP
path='video.mp4'
vr = VideoReaderNP(path)
with napari.gui_qt():
viewer = napari.view_image(vr, name=path)
Internals
napari_video.napari_video.VideoReaderNP exposes a video with a numpy-like interface, using opencv as a backend.
For instance, open a video:
vr = VideoReaderNP('video.avi')
print(vr)
video.avi with 60932 frames of size (920, 912, 3) at 100.00 fps
Then
vr[100]will return the 100th frame as a numpy array with shape(902, 912, 3).vr[100:200:10]will return 10 frames evenly spaced between frame number 100 and 200 (shape(10, 902, 912, 3)).- Note that by default, single-frame and slice indexing return 3D and 4D arrays, respectively. To consistently return 4D arrays, open the video with
remove_leading_singleton=False.vr[100]will then return a(1, 902, 912, 3)array. - We can also request specific ROIs and channels. For instance,
vr[100:200:10,100:400,800:850,1]will return an array with shape(10, 300, 50, 1).
1 maintainer
Metadata
1 maintainer
Release files for napari_video 0.2.13
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