I'm generating a screenshot slideshow similar to the steps described in #426 ... oddly today I started getting an error:

Setup: Win7x86
Steps:

1. Grab some screens of various sizes with Greenshot
2. Load into STG, add a progress bar and a watermark
3. Save as weither GIF or APNG

Defect:
![2019-03-02 22_17_11-exception viewer](https://user-images.githubusercontent.com/1289134/53690914-f7

Currently this page https://asciinema.org/docs/installation#installing-on-linux does not refer to snap installation method. I think we need to update that page and (potentially) make that the "default" way of installing asciinema on Linux based systems.

DOM attributes have many corner cases, every JS UI framework handles these.

For rrweb, we need improve our setAttribute and removeAttribute calls.

Points to cover:

• playbook for how to get started with testing
• differences between testing locally vs staging vs production
• how to configure tests for different environments

@johngrimsey thank you for the idea! Please feel free to comment if I missed something.

使用grabBuffers对rtsp进行连续截图的时候，图像模糊，海康的摄像头

Api – https://docs.box.com/docs. Bonus points for the “expire shared link” date selection, which allow to specify when a shared link to an uploaded file will expire, like say, one week from now, two weeks from now, etc.