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Add a new link type for video files

From: stardiviner
Subject: Add a new link type for video files
Date: Fri, 03 Jan 2020 17:07:16 +0800
User-agent: mu4e 1.3.2; emacs 27.0.50

I write a patch to add new link type:


This will open video file in specific timestamp. And it is possible to add more
options in link. Like video player arguments.

I want to ask should I add this patch to Org Mode built-in?

Here is my patch source code:

#+begin_src emacs-lisp :file "ol-video.el"
;;; [[video:/path/to/file.mp4::00:13:20]]
(defcustom org-video-link-open-command "mplayer"
  "Specify the program for openning video: link."
  :type 'string)

(defvar org-video-link-extension-list '("avi" "rmvb" "ogg" "mp4" "mkv"))

(defun org-video-link-open (uri)
  "Open video file `URI' with video player."
  (let* ((list (split-string uri "::"))
         (path (car list))
         (start-timstamp (cadr list)))
     :command (list org-video-link-open-command
                    "-ss" start-timstamp
                    (expand-file-name (org-link-unescape path)))
     :name "org-video-link")))

(defun org-video-complete-link (&optional arg)
  "Create a video link using completion."
  (let ((file (read-file-name "Video: " nil nil nil nil
                              #'(lambda (file)
                                   (file-name-extension file)))))
        (pwd (file-name-as-directory (expand-file-name ".")))
        (pwd1 (file-name-as-directory (abbreviate-file-name
                                       (expand-file-name ".")))))
    (cond ((equal arg '(16))
           (concat "video:"
                   (abbreviate-file-name (expand-file-name file))))
            (concat "^" (regexp-quote pwd1) "\\(.+\\)") file)
           (concat "video:" (match-string 1 file)))
            (concat "^" (regexp-quote pwd) "\\(.+\\)")
            (expand-file-name file))
           (concat "video:"
                   (match-string 1 (expand-file-name file))))
          (t (concat "video:" file)))))

(org-link-set-parameters "video"
                         :follow #'org-video-link-open
                         :complete #'org-video-complete-link)

[ stardiviner ]
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