Can't edit buffer after livedown:preview

[paidi]

After calling livedown:preview I can no longer edit my buffer. It looks like emacs is waiting for the livedown process to return before returning control to the editor.

I made a tiny change, substituting async-shell-command for call-process-shell-command, which seems to work (paidi@bc87c3a)

[nephewtom]

Same here.
I don't know how the Look ma, realtime! of the animated image demo was done.
It does not work for me.

Using async-shell-command seems to make emacs respond, but it opens *Async Shell Command* buffer, and it would be nice if it was created in the background, i.e.: not visible.

Also, when modifying the markdown file again, it prompts in the minibuffer: A command is running in the default buffer. Use a new buffer? (yes or no), and it is annoying that appears each time for refreshing changes. Any solution?