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GNEVE [GNU Emacs Video Editing] 0.2 release

GNU Emacs video editor mode for editing video using an Edit Decision List [EDL].

GNEVE is an extension for GNU Emacs to provide flexible EDL (Edit Decision List) video editing facilities as part of a free, multimedia production toolchain. GNEVE is under active development, currently with three developers working towards a first beta release. GNEVE depends on the freely available MPlayer software for previewing, and the latest, free MLT framework/video editor for EDL processing. The software is keystroke driven, with flexible preview and render functionalities. GNEVE is written in Emacs Lisp, and runs on GNU/Linux.

Dependencies: MLT framework: http://www.mltframework.org/twiki/bin/view/MLT/

[formerly: avidemux 2.4, mplayer 1.0 [patched]]


Martin Howse

Arn Matyasi

Gabor Torok


Download latest release: http://1010.co.uk/gneve.el

Savannah: https://savannah.nongnu.org/projects/gneve/

Development notes [MH] follow:

[see also: gneve_development ]

GNEVE and DV (2007.10.10:2 tech_notes2#21 gneve#10)

1] export from Kino as MPEG4 AVI single pass [btw. have to edit appropriate script in: /usr/share/kino/scripts/exports/ so that mp3 is libmp3lame to avoid halting at: "unknown encoder mp3"]

2] potentially use --force-smart on avidemux2_cli (in gneve.el)

latest GNEVE [GNU Emacs Video Editing] release: (2007.10.10:1)


With thanks to: Arnold Matyasi and Gabor Torok

For gneve: (2007.02.16:2)


0:01:04,050 --> 0:01:07,000
Hello Guenther. See you in a moment!

0:01:12,000 --> 0:01:14,080
May I present: State secretary von Weinlaub. 

and so on as numbered

(also for regions to test, render and play region)

latest code-base: (2007.01.31:5 promiscuOS#7 gneve#7)

leaks.el and gneve.el

leak.el updated over last paste!

GNEVE more-or-less functional: (2007.01.30:2)

Using patched MPlayer and avidemux for rendering

M-x gneve-mode

Keys in buffer:

K next-frame
L pause
Q one-sec-back
W one-sec-forward
E mark-start
R mark-end
H write-marks
V open-film
Y goto-start
X goto-end
C goto-point
P render
S buffer-save
Z buffer-preview
U region-preview

avidemux EDL format dissected: (2007.01.30:1)

01 videos
Name : /~/gneve/test1.avi ## source file
05 segments ## number of segments
Start : 0 ## start frame number
Size : 100 ## length in frames 
Ref :   0
Start : 3000
Size : 100
Ref :   0
Start : 5000
Size : 100
Ref :   0
Start : 6000
Size : 100
Ref :   0
Start : 8000
Size : 100
Ref :   0
Audio codec : lame
Audio filter : audioNormalizeMode=0 audioResampleMode=0 audioDRC=0 audioShift=0 audioDelay=0 audioFreq=48000 audioChannelConv=0 
Audio conf : audioProcessMode=0 audioMP3mode=0 audioMP3bitrate=128 audioMP3preset=0 
Video start-end : 0 499 ## length total in frames
container :0

thus we need to:

1] convert start-time/end-times to frames

2] subtract for length

3] make total length

4] format correctly and wrap

5] call avidemux with this (temp) saved EDL file:

avidemux2 --load test2.edl --video-process --save test.avi --quit

(and for previewing now play this)

mplayer is patched (2007.01.26:1)

to provide floating point accuracy in GNEVE:

mplayer.c line 5170:

      mp_msg(MSGT_GLOBAL, MSGL_INFO, "ANS_TIME_POSITION=%.6f\n", pos);


Rendering for GNEVE: (2007.01.25:2)

1] Convert file or region to (semi-)temporary SMIL file for rendering in Kino (for example) - can we do this on commandline?

what other potential rendering engines?

smilutil and mplex: http://www.mail-archive.com/mjpeg-users@lists.sourceforge.net/msg07052.html

2] Sample SMIL EDL:

<?xml version="1.0"?>
<smil xmlns="http://www.w3.org/2001/SMIL20/Language">
      <video src="capture016.dv" clipBegin="00:00:00.000" clipEnd="00:04:39.960"/>

GNEVE - GNU Emacs Video Editor major mode: (2007.01.25:1)

Some progress in navigating video file and marking in and out points in buffer:

1) Navigate with C-q and C-w (back and forwards), C-k frame by frame (should change bindings), C-l toggles pause.

2) Mark start point with C-e. End points with C-r

3) Insert these into GNEVE buffer with H

;;; make a mode - keys and so on

(defvar gneve-mode-map nil
  "local keymap for gneve")

;;(setq gneve-mode-map nil)

(if gneve-mode-map
  (setq gneve-mode-map (make-sparse-keymap))
  (define-key gneve-mode-map "\C-k" 'next-frame)
  (define-key gneve-mode-map "\C-l" 'pause)
  (define-key gneve-mode-map "\C-q" 'one-sec-back)
  (define-key gneve-mode-map "\C-w" 'one-sec-forward)
  (define-key gneve-mode-map "\C-e" 'mark-start)
  (define-key gneve-mode-map "\C-r" 'mark-end)
  (define-key gneve-mode-map "H" 'write-marks))
(defun gneve-mode()
  "EDL and mplayer based GNU Emacs video editing mode"
  (start-process "my-process" "boo" "/root/MPlayer-1.0rc1/mplayer" "-edlout" "/root/test.edl" "-slave" "-quiet"  "/root/possession.avi")
  (pop-to-buffer "*GNEVE*" nil)
  (setq major-mode 'gneve-mode)
  (setq mode-name "gneve")
  (use-local-map gneve-mode-map))

(defun next-frame ()
  (process-send-string "my-process" "frame_step\n"))

(defun pause ()
  (process-send-string "my-process" "pause\n"))

(defun write-marks ()
  ;; copy/write both last-in and last-out to end of gneve buffer
  (switch-to-buffer "*GNEVE*")
(goto-char (point-max))

(insert (format "%s %s" lastin lastout)))

(defun one-sec-back ()
  (process-send-string "my-process" "seek -0.5\n"))

(defun one-sec-forward ()
  (process-send-string "my-process" "seek 0.1\n"))

(defun mark-start ()
  ;; copies latest mark to boo. copy and paste only to variable - new function write to buffer
  ;; goto end of buffer search back to equals and copy to last-in
  (switch-to-buffer-other-window "boo")
  (process-send-string "my-process" "pausing get_time_pos\n")
  (sleep-for 0.1)
  (goto-char (point-max))
  (setq end (point))
  (search-backward "=")
  ;; one char forward
  (setq start (point))
  (copy-region-as-kill start end)
  (setq lastin (car kill-ring))
  (switch-to-buffer-other-window "*GNEVE*")))

(defun mark-end ()
  ;; copies latest mark to boo. copy and paste only to variable - new function write to buffer
  ;; goto end of buffer search back to equals and copy to last-in
  (switch-to-buffer-other-window "boo")
  (process-send-string "my-process" "pausing get_time_pos\n")
  (sleep-for 0.1)
  (goto-char (point-max))
  (setq end (point))
  (search-backward "=")
  ;; one char forward
  (setq start (point))
  (copy-region-as-kill start end)
  (setq lastout (car kill-ring))
  (switch-to-buffer-other-window "*GNEVE*")))

Simple GNU Emacs video editor GNEVE (2007.01.24:1 emacs#16 gneve#1)

Also to be used as subtitle editor.


Creating an Asynchronous Process

Function: start-process name buffer-or-name program &rest args

This function creates a new asynchronous subprocess and starts the program program running in it. It returns a process object that stands for the new subprocess in Lisp. The argument name specifies the name for the process object; if a process with this name already exists, then name is modified (by adding `<1>', etc.) to be unique. The buffer buffer-or-name is the buffer to associate with the process.

buffer-or-name is of interest to try and receive timing information from mplayer slave: