def ffmpeg_extract_audio(inputfile, output, bitrate=3000, fps=44100):
""" extract the sound from a video file and save it in ``output`` """
cmd = [
get_setting("FFMPEG_BINARY"), "-y", "-i", inputfile, "-ab",
"%dk" % bitrate, "-ar",
"%d" % fps, output
]
subprocess_call(cmd)
def ffmpeg_resize(video, output, size):
""" resizes ``video`` to new size ``size`` and write the result
in file ``output``. """
cmd = [
get_setting("FFMPEG_BINARY"), "-i", video, "-vf",
"scale=%d:%d" % (res[0], res[1]), output
]
subprocess_call(cmd)
def ffmpeg_merge_video_audio(video,
audio,
output,
vcodec='copy',
acodec='copy',
ffmpeg_output=False,
verbose=True):
""" merges video file ``video`` and audio file ``audio`` into one
movie file ``output``. """
cmd = [
get_setting("FFMPEG_BINARY"), "-y", "-i", audio, "-i", video,
"-vcodec", vcodec, "-acodec", acodec, output
]
subprocess_call(cmd, verbose=verbose)
def ffmpeg_extract_subclip(filename, t1, t2, targetname=None):
""" makes a new video file playing video file ``filename`` between
the times ``t1`` and ``t2``. """
name, ext = os.path.splitext(filename)
if not targetname:
T1, T2 = [int(1000 * t) for t in [t1, t2]]
targetname = name + "%sSUB%d_%d.%s" (name, T1, T2, ext)
cmd = [
get_setting("FFMPEG_BINARY"), "-y", "-i", filename, "-ss",
"%0.2f" % t1, "-t",
"%0.2f" % (t2 - t1), "-vcodec", "copy", "-acodec", "copy", targetname
]
subprocess_call(cmd)
def ffmpeg_movie_from_frames(filename, folder, fps, digits=6):
"""
Writes a movie out of the frames (picture files) in a folder.
Almost deprecated.
"""
s = "%" + "%02d" % digits + "d.png"
cmd = [
get_setting("FFMPEG_BINARY"), "-y", "-f", "image2", "-r",
"%d" % fps, "-i",
os.path.join(folder, folder) + '/' + s, "-b",
"%dk" % bitrate, "-r",
"%d" % self.fps, filename
]
subprocess_call(cmd)
def download_webfile(url, filename, overwrite=False):
""" Small utility to download the file at 'url' under name 'filename'.
If url is a youtube video ID like z410eauCnH it will download the video
using youtube-dl (install youtube-dl first !).
If the filename already exists and overwrite=False, nothing will happen.
"""
if os.path.exists(filename) and not overwrite:
return
if '.' in url:
urlretrieve(url, filename)
else:
try:
subprocess_call(['youtube-dl', url, '-o', filename])
except OSError as e:
raise OSError(
e.message + '\n A possible reason is that youtube-dl'
' is not installed on your computer. Install it with '
' "pip install youtube-dl"')
def write_gif_with_tempfiles(clip,
filename,
fps=None,
program='ImageMagick',
opt="OptimizeTransparency",
fuzz=1,
verbose=True,
loop=0,
dispose=True,
colors=None,
tempfiles=False):
""" Write the VideoClip to a GIF file.
Converts a VideoClip into an animated GIF using ImageMagick
or ffmpeg. Does the same as write_gif (see this one for more
docstring), but writes every frame to a file instead of passing
them in the RAM. Useful on computers with little RAM.
"""
fileName, fileExtension = os.path.splitext(filename)
tt = np.arange(0, clip.duration, 1.0 / fps)
tempfiles = []
verbose_print(
verbose,
"\n[CartoonPy] Building file %s\n" % filename + 40 * "-" + "\n")
verbose_print(verbose, "[CartoonPy] Generating GIF frames...\n")
total = int(clip.duration * fps) + 1
for i, t in tqdm(enumerate(tt), total=total):
name = "%s_GIFTEMP%04d.png" % (fileName, i + 1)
tempfiles.append(name)
clip.save_frame(name, t, withmask=True)
delay = int(100.0 / fps)
if program == "ImageMagick":
verbose_print(verbose,
"[CartoonPy] Optimizing GIF with ImageMagick... ")
cmd = [
get_setting("IMAGEMAGICK_BINARY"),
'-delay',
'%d' % delay,
"-dispose",
"%d" % (2 if dispose else 1),
"-loop",
"%d" % loop,
"%s_GIFTEMP*.png" % fileName,
"-coalesce",
"-layers",
"%s" % opt,
"-fuzz",
"%02d" % fuzz + "%",
] + (["-colors", "%d" %
colors] if colors is not None else []) + [filename]
elif program == "ffmpeg":
cmd = [
get_setting("FFMPEG_BINARY"), '-y', '-f', 'image2', '-r',
str(fps), '-i', fileName + '_GIFTEMP%04d.png', '-r',
str(fps), filename
]
try:
subprocess_call(cmd, verbose=verbose)
verbose_print(verbose, "[CartoonPy] GIF %s is ready." % filename)
except (IOError, OSError) as err:
error = ("CartoonPy Error: creation of %s failed because "
"of the following error:\n\n%s.\n\n." % (filename, str(err)))
if program == "ImageMagick":
error = error + (
"This error can be due to the fact that "
"ImageMagick is not installed on your computer, or "
"(for Windows users) that you didn't specify the "
"path to the ImageMagick binary in file conf.py.")
raise IOError(error)
for f in tempfiles:
os.remove(f)