ffmpeg-utils.el

   1 ;;; ffmpeg-utils.el --- FFmpeg command utilities wrappers -*- lexical-binding: t; -*-
   2
   3 ;;; Time-stamp: <2020-10-29 11:08:29 stardiviner>
   4
   5 ;; Authors: stardiviner <numbchild@gmail.com>
   6 ;; Package-Requires: ((emacs "25.1") (alert "1.2") (transient "0.1.0") (osx-lib "0.1"))
   7 ;; Version: 0.1
   8 ;; Keywords: multimedia
   9 ;; homepage: https://repo.or.cz/ffmpeg-utils.git
  10
  11 ;; ffmpeg-utils.el is free software; you can redistribute it and/or modify it
  12 ;; under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15 ;;
  16 ;; ffmpeg-utils.el is distributed in the hope that it will be useful, but WITHOUT
  17 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  18 ;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  19 ;; License for more details.
  20 ;;
  21 ;;
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; Usage:
  28 ;;; - [M-x ffmpeg-utils-cut-clip]
  29
  30 ;;; Code:
  31 \f
  32 (require 'notifications)
  33 (require 'alert)
  34 (require 'transient)
  35
  36 (defvar ffmpeg-utils--output-filename nil
  37   "A variable to store the command output filename which used in notification.")
  38
  39 (defcustom ffmpeg-utils-notification-function 'ffmpeg-utils-notification-default
  40   "Specify the ffmpeg command process sentinel function."
  41   :type 'function
  42   :safe #'functionp
  43   :group 'ffmpeg)
  44
  45 (defun ffmpeg-utils-notification-default (&optional proc event)
  46   "The ffmpeg command process sentinel notification function with args PROC, EVENT."
  47   (setq mode-line-process nil)     ; remove mode-line-process indicator.
  48   (let ((msg (format "ffmpeg cut file: [%s] finished.\nprocess: [%s], status: [%s]."
  49                      proc event (file-name-nondirectory ffmpeg-utils--output-filename))))
  50     (pcase system-type
  51       ('gnu/linux
  52        (cond
  53         ((and (featurep 'dbus) (fboundp 'notifications-notify))
  54          (notifications-notify :title "Emacs ffmpeg-utils.el" :body msg))))
  55       ('darwin
  56        (cond
  57         ((featurep 'alert)
  58          (let ((msg "Emacs ffmpeg-utils.el process finished."))
  59            (cl-case system-type
  60              (darwin
  61               (ns-do-applescript (format "say \"%s\"" msg))))
  62            (alert msg :title "Emacs ffmpeg-utils.el")))
  63         ((and (featurep 'osx-lib) (bound-and-true-p osx-lib-start-terminal))
  64          (require 'osx-lib)
  65          (osx-lib-notify3 "Emacs" "ffmpeg-utils.el" msg))
  66         ((fboundp 'ns-do-applescript)
  67          (ns-do-applescript
  68           (format "display notification \"%s\" with title \"%s\""
  69                   msg "Emacs ffmpeg-utils.el")))
  70         ((executable-find "osascript")
  71          ;; (start-process
  72          ;;  "emacs-timer-notification" nil
  73          ;;  "osascript"
  74          ;;  (format "-e 'display notification \"%s\" with title \"%s\"'" msg "Emacs ffmpeg-utils.el"))
  75          (shell-command
  76           (format "osascript -e 'display notification \"%s\" with title \"%s\"'"
  77                   "yes" "Emacs ffmpeg-utils.el")))))
  78       (_ (message "Emacs ffmpeg-utils.el: %s" msg)))))
  79
  80 (defun ffmpeg-utils--run-command (arglist)
  81   "Construct ffmpeg command with ARGLIST, SENTINEL-FUNC and BODY."
  82   (make-process
  83    :name "ffmpeg"
  84    :command (append '("ffmpeg") arglist) ; <------------- problem here
  85    :buffer "*ffmpeg*"
  86    :sentinel ffmpeg-utils-notification-function))
  87
  88 (defun ffmpeg-utils-mode-line-running-indicator (msg)
  89   "Display a running indicator MSG on mode-line."
  90   (setq mode-line-process
  91         (concat " "
  92                 (propertize (or msg "ffmpeg running...")
  93                             'font-lock-face 'mode-line-highlight)))
  94   (force-mode-line-update t))
  95
  96 ;;; ffmpeg command option "-t" accept seconds like 57 as value.
  97 (defun ffmpeg-utils--subtract-timestamps (start-timestamp end-timestamp)
  98   "Subtract END-TIMESTAMP with START-TIMESTAMP."
  99   (time-subtract
 100    (encode-time
 101     (parse-time-string ; (SECOND MINUTE HOUR DAY MONTH YEAR IGNORED DST ZONE)
 102      (concat "2020-01-01" " " end-timestamp)))
 103    (encode-time
 104     (parse-time-string
 105      (concat "2020-01-01" " " start-timestamp)))))
 106
 107 ;; (ffmpeg-utils--subtract-timestamps "00:11:25" "00:12:12")
 108
 109 (defun ffmpeg-utils-cut-clip (input-filename start-timestamp end-timestamp output-filename)
 110   "Clip INPUT-FILENAME on START-TIMESTAMP END-TIMESTAMP, output OUTPUT-FILENAME.
 111
 112 Support read timestamp begin/end range in format like this:
 113 00:17:23 -- 00:21:45."
 114   (interactive
 115    (if (region-active-p)
 116        ;; regexp spec detect "00:17:23 -- 00:21:45"
 117        (let* ((time-range (split-string
 118                            (buffer-substring-no-properties
 119                             (region-beginning) (region-end))
 120                            " -- "))
 121               (timestamp-begin (car time-range))
 122               (timestamp-end (cadr time-range)))
 123          (list
 124           (expand-file-name
 125            (substring-no-properties
 126             (read-file-name "FFmpeg input filename: "
 127                             nil nil 'confirm-after-completion)))
 128           timestamp-begin
 129           timestamp-end
 130           (expand-file-name
 131            (substring-no-properties
 132             (read-file-name "FFmpeg output filename: ")))))
 133      (list
 134       (read-file-name "FFmpeg input filename: ")
 135       (read-string "FFmpeg start timestamp: ")
 136       (read-string "FFmpeg end timestamp: ")
 137       (read-file-name "FFmpeg output filename: "))))
 138   (when (region-active-p) (deactivate-mark) (forward-line) (newline) (forward-line -1))
 139   (ffmpeg-utils-mode-line-running-indicator "ffmpeg cut video clip")
 140   (setq ffmpeg-utils--output-filename output-filename)
 141   (let ((input-type (file-name-extension input-filename))
 142         (output-type (file-name-extension output-filename)))
 143     (if output-type
 144         ;; output filename specified video file extension.
 145         (if (string-equal output-type input-type) ; if output extension is same as input
 146             output-filename             ; keep output original extension
 147           (if (yes-or-no-p "Whether keep output video format extension? ")
 148               output-filename
 149             (setq output-filename
 150                   (format "%s.%s" (file-name-sans-extension output-filename) input-type))))
 151       ;; output filename has NOT specific video file extension.
 152       (setq output-filename (format "%s.%s" output-filename input-type)))
 153     ;; "ffmpeg -i input-filename -ss start-timestamp -t time-timestamp -codec copy output-filename"
 154     (ffmpeg-utils--run-command
 155      `("-i" ,input-filename
 156        "-ss" ,start-timestamp
 157        "-t" ,(number-to-string (ffmpeg-utils--subtract-timestamps start-timestamp end-timestamp))
 158        "-codec" "copy"
 159        ,output-filename))))
 160
 161 ;; (define-transient-command ffmpeg-transient ()
 162 ;;   "ffmpeg transient commands"
 163 ;;   ["Video"
 164 ;;    ("c" "Cut video clip" ffmpeg-utils-cut-clip)]
 165 ;;   ["Audio"
 166 ;;    ("c" "Cut audio clip" ffmpeg-utils-cut-clip)])
 167
 168 \f
 169
 170 (provide 'ffmpeg-utils)
 171
 172 ;;; ffmpeg-utils.el ends here