/usr/bin/lives_gif_encoder3 is in lives-plugins 2.4.8-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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import locale
locale.setlocale(locale.LC_NUMERIC,"C")
"""
lives_gif_encoder3
Front-end to various programs needed to create GIF
movies with some image-enhancing capabilities through the use of
ImageMagick. Meant as a companion to LiVES (to possibly call
from within a plugin, see http://www.xs4all.nl/~salsaman/lives/ )
but can also be used as a stand-alone program.
Requires ImageMagick (GraphicsMagick might also
work) and Python 2.3.0 or greater. Note that audio
support is not implemented, only video encoding.
Note that encoding and decoding requires huge amounts
of memory, and so it's mostly meant for very short
clips (e.g. animated web graphics). The resulting
clips can be viewed using the "animate" command which is
part of ImageMagick, or a graphical web browser.
Copyright (C) 2004-2005 Marco De la Cruz (marco@reimeika.ca)
It's a trivial program, but might as well GPL it, so see:
http://www.gnu.org/copyleft/gpl.html for license.
See my vids at http://amv.reimeika.ca !
"""
version = '0.0.7'
convert = 'convert'
usage = \
"""
lives_gif_encoder3 -h
lives_gif_encoder3 -V
lives_gif_encoder3 -C
lives_gif_encoder3 [-o out] [-p pre] [-d dir] [-a aspect*] [-D delay*]
[-q|-v] [-t type*] [-k] [-e [[-w dir] [-c geom] [-r geom]]]
[-s sndfile*] [-b sndrate*] [-f fpscode] [-L lv1file]
[firstframe lastframe]
"""
help = \
"""
SUMMARY (ver. %s):
Encodes a series of PNG or JPG images into an animated GIF
(.gif) and is also capable of performing some simple image
enhacements using ImageMagick. The images and audio are assumed to
be in an uncompressed LiVES format, hence making this encoder
more suitable to be used within a LiVES plugin (but can also
be used directly on a LiVES temporary directory).
OPTIONS:
-h for help.
-V shows the version number.
-C check external program dependencies and exit.
-o out will save the video in file "out".
Default: "gif_movie.gif".
-p pre the encoder assumes that sound and images are named using
LiVES' conventions i.e. "audio" and "00000001.ext",
"00000002.ext"... where "ext" is either "jpg" or "png".
However, lives_gif_encoder3 will create temporary files
which can be saved for later use (for example, after
enhancing the images with "-e" , which may take a long
time). These temporary files will be named
"pre_00000001.ext", etc... where "pre" is either "eimg"
or "rimg" and will be kept if the "-k" option is used.
lives_gif_encoder3 can then be run over the enhanced images
only by selecting the appropriate prefix ("eimg" or
"rimg") here. See "-e" to see what each prefix means.
Default: "" (an empty string).
-d dir "dir" is the directory containing the source image
files. These must be of the form "00000001.ext" or
"pre_00000001.ext" as explained above.
Default: "."
-a aspect* sets the aspect ratio of the resulting movie.
* = NOT IMPLEMENTED
-D delay* linearly delay the audio stream by "delay" ms.
* = NOT IMPLEMENTED
-q quiet operation, only complains on error.
-v be verbose.
-t type* type of video created.
* = NOT IMPLEMENTED
-e perform some simple filtering/enhancement to improve image
quality. The images created by using this option will be
stored in the directory specified by the "-w" option (or
"-d" if not present, see above) and each filename will be
prefixed with "eimg" (see "-p" above). Using this option will
take enormous amounts of disk space, and in reality does
not do anything that cannot be done within LiVES itself.
Using this option enables the following four:
-w dir "dir" is the working directory where the enhanced
images will be saved. Although these can all
co-exist with the original LiVES files it is
recommended you use a different directory. Note
that temporary files may take a huge amount of
space, perhaps twice as much as the LiVES files
themselves. If this directory does not exist is
will be created.
Default: same as "-d".
-k keep the temporary files, useful to experiment
with different encoding types without having
to repeatedly enhance the images (which can be
very time-consuming). See "-p" above.
-c geom in addition to enhancing the images, crop them
to the specified geometry e.g. "688x448+17+11".
Filename prefix remains "eimg".
-r geom this will create a second set of images resulting
from resizing the images that have already been
enhanced and possibly cropped (if "-c" has been
specified). The geometry here is simple a new
image size e.g. "352x240!". This second set will have
filenames prefixed with the string "rimg" (see "-p"
above).
-s sndfile* name of the audio file.
* = NOT IMPLEMENTED
-b sndrate* sample rate of the sound file in Hertz.
* = NOT IMPLEMENTED
-f fpscode frame-rate code. Acceptable values are:
1 - 24000.0/1001.0 (NTSC 3:2 pulldown converted FILM)
2 - 24.0 (NATIVE FILM)
3 - 25.0 (PAL/SECAM VIDEO / converted FILM)
4 - 30000.0/1001.0 (NTSC VIDEO)
5 - 30.0
6 - 50.0 (PAL FIELD RATE)
7 - 60000.0/1001.0 (NTSC FIELD RATE)
8 - 60.0
If the input value is a float (e.g. 5.0, 14.555, etc.)
the encoder will use that as frame rate.
Default: "4".
-L lv1file use the images stored in the LiVES file "lv1file" (e.g.
"movie.lv1"). Files will be extracted inside "dir" as
specified by "-d". Using this option allows to encode
a movie without having to restore it first with LiVES.
Note that the encoder will not delete the extracted
files after it has finished, this must be done manually
afterwards. If frame code/rate (-f) and/or sound rate (-b)
are not specified the defaults will be used (30000/1001 fps
and 44100 Hz). These, however, may not be correct, in which
case they should be specified explicitly. Furthermore, the
.lv1 audio (if present) is always assumed to have a sample
data size in 16-bit words with two channels, and to be signed
linear (this is usually the case, however). If any of these
latter parameters are incorrect the resulting file may be
corrupted and encoding will have to be done using LiVES.
firstframe first frame number. If less than eight digits long it will
be padded with zeroes e.g. 234 -> 00000234. A prefix can
be added using the "-p" option.
Default: "00000001"
lastframe last frame number, padded with zeroes if necessary, prefix
set by "-p".
Default: the last frame of its type in the "-d" directory,
where "type" is set by the prefix.
Note that either no frames or both first and last frames must be specified.
EXAMPLES:
Suppose you have restored a LiVES' .lv1 file (in either JPG or PNG format),
and that the images are stored in the directory "/tmp/livestmp/991319584/".
Then, in order to create an gif file you can simply do the following:
lives_gif_encoder3 -d /tmp/livestmp/991319584 -o /movies/default.gif
and the clip "default.gif" will be created in "/movies/".
Suppose we want to make a downloadable version of the clip, small in size
but of good quality. The following command activates the generic enhancement
filter and resizes the images to "352x240". Note that these operations
are performed after cropping the originals a bit (using "704x464+5+6").
This is done because we are assuming that there is a black border around
the original pictures which we want to get rid of (this might distort the
images somewhat, so be careful about cropping/resizing):
lives_gif_encoder3 -v -d /tmp/livestmp/991319584 -w /tmp/tmpgif \\
-o /movies/download.gif -k -e -c "704x464+5+6" -r "352x240"
Since we use the "-k" flag the enhanced images are kept (both full-size
crops and the resized ones) in "/tmp/tmpgif". Beware that this may consume
a lot of disk space (about 10x as much as the originals). The reason we
keep them is because the above may take quite a long time and we may want
to re-use the enhanced images. So, for example, creating a
clip at full size can be accomplished now as follows:
lives_gif_encoder3 -d /tmp/tmpgif -o /movies/archive.gif \\
-s /tmp/livestmp/991319584/audio -k -p eimg
If, for example, we only want to encode frames 100 to 150 we can run
the following:
lives_gif_encoder3 -v -d /tmp/tmpgif -o /movies/selection.gif \\
-k -p eimg 100 150
To delete all the enhanced images you can just remove "/tmp/tmpgif".
Suppose that you have "movie1.lv1", "movie2.lv1" and "movie3.lv1".
Batch-encoding can be done as follows (zsh-syntax):
for i in movie?.lv1
do
mkdir /tmp/$i:r
lives_gif_encoder3 -d /tmp/$i:r -o /tmp/$i:r.gif -L $i
rm -rf /tmp/$i:r
done
This will generate the files "movie1.gif", "movie2.gif" and
"movie3.gif" in "/tmp". Note that is is not necessary to
specify whether the files are stored in JPG or PNG format,
and that potentially time-consuming options (e.g. "-e") may
be enabled. It is not necessary to have a working LiVES
installation to encode .lv1 files.
""" % version
def run(command):
"""
Run a shell command
"""
if verbose:
print('Running: \n' + command + '\n=== ... ===')
std = ''
else:
std = ' > /dev/null 2>&1'
os.system(command + std)
def do_enhance():
"""
Image cleanup/crop/resize routine. Generic, but seems to work
well with anime :)
"""
if not quiet:
print('Enhancing images... please wait, this might take long...')
enh_opts = "-enhance -sharpen '0.0x0.5' -gamma 1.2 -contrast -depth 8"
if cgeom:
docrop = ' '.join(['-crop', "'%s!'" % cgeom])
else:
docrop = ''
iframe = first_num
while True:
# File names are padded with zeroes to 8 characters
# (not counting the .ext).
frame = str(iframe).zfill(8)
fname = os.path.join(img_dir, frame + ext)
if not os.path.isfile(fname) or (iframe == last_num + 1):
break
eimg_fname = os.path.join(work_dir, 'eimg' + frame + '.png')
rimg_fname = os.path.join(work_dir, 'rimg' + frame + '.png')
command = ' '.join([convert, docrop, enh_opts, fname, eimg_fname])
run(command)
if rgeom:
if os.path.exists(rimg_fname): os.remove(rimg_fname)
shrink = ' '.join([convert, '-resize', "'%s!'" % rgeom, '-depth 8'])
command = ' '.join([shrink, eimg_fname, rimg_fname])
run(command)
else:
if os.path.exists(rimg_fname): os.remove(rimg_fname)
try:
os.symlink(eimg_fname, rimg_fname)
except (IOError, OSError):
shutil.copy(eimg_fname, rimg_fname)
iframe+=1
def do_encode():
"""
Encode a series of images as an GIF file.
"""
if verbose:
std = ''
std2 = ''
be_verbose = '-verbose'
else:
std = ' > /dev/null 2>&1'
std2 = ' 2> /dev/null'
be_verbose = ''
if img_dir != work_dir and not enhance:
source_dir = img_dir
else:
source_dir = work_dir
if frame_range:
numframes = str(last_num - first_num + 1)
frame_list = [img_pre + str(f).zfill(8) + ext \
for f in range(first_num, last_num + 1)]
syml = 'temporary_symlink_'
for iframe in frame_list:
frfile = os.path.join(source_dir, iframe)
frlink = os.path.join(source_dir, syml + iframe)
if os.path.islink(frlink): os.remove(frlink)
try:
os.symlink(frfile, frlink)
except (IOError, OSError):
shutil.copy(frfile, frlink)
else:
syml = ''
numframes = len(glob.glob(os.path.join(source_dir, \
img_pre + '*' + ext)))
# Delay between frames is in 100ths of a second
spf = 100*(1/fps)
gifv = tempfile.mkstemp('.gif', '', work_dir)[1]
all_vars = {}
all_vars.update(globals())
all_vars.update(locals())
if not quiet:
print('Creating GIF file')
command = """cd %(source_dir)s ; \\
%(convert)s -delay %(spf)s %(syml)s%(img_pre)s*%(ext)s %(gifv)s
""" % all_vars
run(command)
shutil.move(gifv, vidname)
if frame_range:
lframes = os.path.join(source_dir, syml)
for frame in glob.glob(lframes + '*'):
os.remove(frame)
def do_clean():
"""
Delete enhanced files
"""
if not quiet:
print('Deleting all enhanced images (if any)')
eframes = os.path.join(work_dir, 'eimg')
rframes = os.path.join(work_dir, 'rimg')
for frame in glob.glob(eframes + '*'):
os.remove(frame)
for frame in glob.glob(rframes + '*'):
os.remove(frame)
def which(command):
"""
Finds (or not) a command a la "which"
"""
command_found = False
if command[0] == '/':
if os.path.isfile(command) and \
os.access(command, os.X_OK):
command_found = True
abs_command = command
else:
path = os.environ.get('PATH', '').split(os.pathsep)
for dir in path:
abs_command = os.path.join(dir, command)
if os.path.isfile(abs_command) and \
os.access(abs_command, os.X_OK):
command_found = True
break
if not command_found:
abs_command = ''
return abs_command
def is_installed(prog):
"""
See whether "prog" is installed
"""
wprog = which(prog)
if wprog == '':
print(prog + ': command not found')
raise SystemExit(1)
else:
if verbose:
print(wprog + ': found')
if __name__ == '__main__':
import os
import sys
import getopt
import shutil
import tempfile
import glob
import tarfile
try:
if sys.version_info[0:3] < (3, 0, 0):
raise SystemExit(1)
except:
print('You need Python 3.0.0 or greater to run me!')
raise SystemExit(1)
try:
(opts, args) = getopt.getopt(sys.argv[1:], \
'ho:p:d:w:a:qvt:ekc:r:s:b:f:VCD:L:')
except:
print("Something's wrong. Try the '-h' flag.")
raise SystemExit(1)
opts = dict(opts)
if not opts and not args:
print(usage)
raise SystemExit(1)
if '-h' in opts:
print(usage + help)
raise SystemExit
if '-V' in opts:
print('lives_gif_encoder3 version ' + version)
raise SystemExit
if ('-v' in opts) or ('-C' in opts):
verbose = True
else:
verbose = False
if '-q' in opts:
quiet = True
verbose = False
else:
quiet = False
for i in [convert]:
is_installed(i)
if '-C' in opts: raise SystemExit
img_pre = opts.get('-p', '')
if img_pre not in ['', 'eimg', 'rimg']:
print('Improper image name prefix.')
raise SystemExit(1)
temp_dir = ''
img_dir = opts.get('-d', '.')
img_dir = os.path.abspath(img_dir)
if ' ' in img_dir:
temp_dir = tempfile.mkdtemp('', '.lives-', '/tmp/')
try:
os.symlink(img_dir, temp_dir + '/img_dir')
except (IOError, OSError):
shutil.copy(img_dir, temp_dir + '/img_dir')
img_dir = temp_dir + '/img_dir'
if not os.path.isdir(img_dir):
print('The image source directory: ' + img_dir + \
' does not exist!')
raise SystemExit(1)
if len(args) not in [0, 2]:
print('If frames are specified both first and last ' + \
'image numbers must be chosen.')
raise SystemExit(1)
elif len(args) == 0:
args = [None, None]
frame_range = False
if not args[0]:
first_frame_num = '1'
else:
frame_range = True
first_frame_num = args[0]
first_frame_num = first_frame_num.zfill(8)
first_num = int(first_frame_num)
if not args[1]:
last_frame_num = '99999999'
else:
last_frame_num = args[1]
last_frame_num = last_frame_num.zfill(8)
last_num = int(last_frame_num)
# Aspect ratio is not used
aspectc = opts.get('-a', '2')
# Video type is not used
vtype = opts.get('-t', 'gif')
out_gif = opts.get('-o', vtype + '_movie.gif')
fpsc = opts.get('-f', '4')
if fpsc not in [str(i) for i in range(1,9)]:
if not quiet: print('Invalid fps code, attempting float fps.')
foundfps = False
else:
if fpsc == '1': fps = 24000.0/1001.0
elif fpsc == '2': fps = 24.0
elif fpsc == '3': fps = 25.0
elif fpsc == '4': fps = 30000.0/1001.0
elif fpsc == '5': fps = 30.0
elif fpsc == '6': fps = 50.0
elif fpsc == '7': fps = 60000.0/1001.0
elif fpsc == '8': fps = 60.0
foundfps = True
if not foundfps:
try:
fps = locale.atof(fpsc)
if not quiet: print('Using fps = %s' % fps)
if fps > 0: foundfps = True
except:
pass
if not foundfps:
print('Invalid fps code or rate.')
raise SystemExit(1)
if '-e' not in opts:
enhance = False
else:
enhance = True
if enhance and img_pre:
print('Sorry, you cannot enhance already-enhanced images')
raise SystemExit(1)
if '-k' not in opts:
keep = False
else:
keep = True
cgeom = opts.get('-c', '')
rgeom = opts.get('-r', '')
if (cgeom or rgeom) and not enhance:
print('Missing "-e" option.')
raise SystemExit(1)
delay = opts.get('-D', '0')
if verbose: print('Linear audio delay (ms): ' + delay)
lv1file = opts.get('-L', None)
if lv1file:
if not quiet: print('Opening lv1 file...')
try:
lv1 = tarfile.open(os.path.abspath(lv1file))
except:
print('This does not appear to be a valid LiVES file!')
raise SystemExit(1)
if 'header.tar' not in lv1.getnames():
print('This does not appear to be a valid LiVES file!')
raise SystemExit(1)
for tfile in lv1.getmembers():
lv1.extract(tfile, img_dir)
for tfile in glob.glob(os.path.join(img_dir, '*.tar')):
imgtar = tarfile.open(tfile)
for img in imgtar.getmembers():
imgtar.extract(img, img_dir)
os.remove(tfile)
test_file = os.path.join(img_dir, img_pre + first_frame_num)
if os.path.isfile(test_file + '.jpg'):
ext = '.jpg'
elif os.path.isfile(test_file + '.png'):
ext = '.png'
else:
print('Cannot find any appropriate %s or %s files!' % ('.jpg','.png'))
raise SystemExit(1)
first_frame = test_file + ext
last_frame = os.path.join(img_dir, img_pre + last_frame_num + ext)
if not quiet: print('Found: ' + first_frame)
work_dir = opts.get('-w', img_dir)
work_dir = os.path.abspath(work_dir)
if not os.path.isdir(work_dir):
if not quiet: print('Creating ' + work_dir)
try:
os.makedirs(work_dir)
os.chmod(work_dir, 0o755)
except:
print('Could not create the work directory ' + \
work_dir)
raise SystemExit(1)
if ' ' in work_dir:
if temp_dir == '':
temp_dir = tempfile.mkdtemp('', '.lives-', '/tmp/')
try:
os.symlink(work_dir, temp_dir + '/work_dir')
except (IOError, OSError):
shutil.copy(work_dir, temp_dir + '/work_dir')
work_dir = temp_dir + '/work_dir'
# Audio is not used
sndf = opts.get('-s', os.path.join(img_dir, 'audio'))
if enhance:
do_enhance()
# Note that do_enhance() always creates images prefixed
# with 'rimg'. What's important to note if that if the
# images are resized the 'rimg' are indeed resized, but
# if not the 'rimg' are simply symlinks to the 'eimg'
# (enhanced) images.
img_pre = 'rimg'
ext = '.png'
vidname = os.path.join(work_dir, out_gif)
# do_encode() acts on images prefixed by img_pre.
do_encode()
if not keep:
do_clean()
if temp_dir != '':
shutil.rmtree(temp_dir)
if not quiet: print("Done!")
"""
CHANGELOG:
29 Oct 2004 : 0.0.1 : first release.
08 Nov 2004 : 0.0.2 : make sure that the enhanced
color depth is 8-bits/channel.
02 Jan 2005 : 0.0.3 : updated docs.
added sound rate (-b) option (unused).
21 Mar 2005 : 0.0.4 : use env python (hopefully >= 2.3)
09 Mar 2006 : 0.0.5 : added '-depth 8' to resize, as ImageMagick
keeps changing its damn behaviour.
28 Jun 2007 : 0.0.6 : handles paths with spaces appropriately
(thanks Gabriel).
"""
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