buffer live, but buffer-live-p gives nil

buffer live, but buffer-live-p gives nil

[Jean Louis]

I can clearly see that I have buffer open and with process in it, but
this function gives me NIL:

(buffer-live-p video-recording-buffer)

It is a mystery, but how is that possible? 🤔

Jean Louis

Re: buffer live, but buffer-live-p gives nil

[Michael Heerdegen via Users list for the GNU Emacs text editor]

Jean Louis <bugs@gnu.support> writes:

> I can clearly see that I have buffer open and with process in it, but
> this function gives me NIL:
>
> (buffer-live-p video-recording-buffer)
>
> It is a mystery, but how is that possible? 🤔

It's a mystery to everyone since you forgot to tell what value you had
assigned to that variable...

Michael.

Re: buffer live, but buffer-live-p gives nil

[Joel Reicher]

Jean Louis <bugs@gnu.support> writes:

> I can clearly see that I have buffer open and with process in 
> it, but this function gives me NIL:
>
> (buffer-live-p video-recording-buffer)

Is `video-recording-buffer' a variable or a function? (I'm not 
familiar with any code it might appear in, sorry.)

Regards,

        - Joel

SOLVED - Re: buffer live, but buffer-live-p gives nil

[Jean Louis]

* Joel Reicher <joel.reicher@gmail.com> [2024-12-26 09:17]:
> Jean Louis <bugs@gnu.support> writes:
> 
> > I can clearly see that I have buffer open and with process in it, but
> > this function gives me NIL:
> > 
> > (buffer-live-p video-recording-buffer)
> 
> Is `video-recording-buffer' a variable or a function? (I'm not familiar with
> any code it might appear in, sorry.)

Variable, thanks, now I got it!

(defun screen-record-switch ()
  (interactive)
  (cond ((and (process-live-p video-recording-process)
	      (buffer-live-p (get-buffer video-recording-buffer)))
	 (switch-to-buffer video-recording-buffer))
	(t (rcd-message "There is no recording available."))))

video-recording-buffer ➜ "*Screen Recording*"

It is of course a bit confusing, some functions accept BUFFER-OR-NAME 🤔
and some only OBJECT 📝.

Now I got it, thanks much! Solved! 😊
-- 
Jean Louis