Getting thumbnail of images and video files in service worker

[Moe Bazzi]

Hey everyone,

In my chrome extension, I fetch images/videos in the service worker and then would like to generate a thumbnail from these media files. In MV2, I was able to do this via the HTML Image and Video elements, but these are not available in the MV3 service worker. What are some other options I have to achieve this? Thanks.

[Jackie Han]

In service worker, for image, you can:

1. create a OffscreenCanvas

2. fetch(img) => to blob => createImageBitmap(blob)

3. now, drawImage(imageBitmap) on (offscreen) canvas.

I don't know how to deal with video in service worker.

Besides service worker, you can open a small non-focus window to do your task, then close it.

On Thu, Sep 8, 2022 at 11:09 PM Moe Bazzi <bazz...@gmail.com> wrote:

Hey everyone,

In my chrome extension, I fetch images/videos in the service worker and then would like to generate a thumbnail from these media files. In MV2, I was able to do this via the HTML Image and Video elements, but these are not available in the MV3 service worker. What are some other options I have to achieve this? Thanks.

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