def png_to_hdf5(input_url, output_url, title="Movie"):
"""
Creates a series of frames in png format to FACETS HDF5 format.
input_url can be a zip file or a local directory containing png files, a
'frames' text file and a 'parameters' text file.
"""
if not use_hdf5:
raise Exception("PyTables not installed.")
if os.path.splitext(input_url)[1] == '.zip':
tmp_dir = getZipURL(input_url)
container = os.listdir(tmp_dir)[0]
png_dir = '%s/%s/' % (tmp_dir, container)
else:
png_dir = input_url.split("//")[1]
if png_dir[-1] != "/":
png_dir += '/'
frames = _get_frame_list(png_dir)
parameters = _get_parameters(png_dir)
print "Creating movie file with %d frames, saving to %s" % (len(frames),
output_url)
h5file = file_extension.openHDF5File(output_url, "w", title=title)
h5file.createCMovie(h5file.root,
"Movie",
frames,
coding=8,
complevel=9,
frame_duration=parameters['frame_duration'])
h5file.close()
def hdf5_to_png(input_url, output_url):
"""
Converts a movie in FACETS HDF5 format to a 'zipped png' format, i.e. a
zipped folder containing one png file for each frame of the movie, plus a
'frames' text file listing the png files in the order they appear in the
movie, and a 'parameters' text file giving the frame_duration parameter.
"""
if not use_hdf5:
raise Exception("PyTables not installed.")
tmpdir_list = []
assert output_url[-3:] == 'zip', "output_url must point to a zip file"
assert output_url[0:7] == 'file://', "for now, must be a file:// url"
input_protocol = input_url.split('://')[0]
# if remote file, create local copy
if input_protocol != 'file':
tmp_dir1 = tempfile.mkdtemp()
tmpdir_list.append(tmp_dir1)
srblib.urlretrieve(input_url, tmp_dir1 + "/tmp.h5")
input_url = "file://" + tmp_dir1 + "/tmp.h5"
# process local hdf5 file
h5file = file_extension.openHDF5File(input_url, 'r')
if isinstance(h5file.root.Movie, movie.CMovie):
# export the movie frames as PNG files to a temporary directory
tmp_dir = tempfile.mkdtemp()
tmpdir_list.append(tmp_dir)
mov = h5file.root.Movie
png_list = mov.export('png', 'file://' + tmp_dir)
# create and add movie frames to zip archive
output_path = output_url.split('//')[1]
zf = zipfile.ZipFile(output_path, 'w', zipfile.ZIP_DEFLATED)
container = os.path.basename(output_path)[:-4] # remove .zip
for pngfile in png_list:
arcname = "%s/%s" % (container, os.path.basename(pngfile))
zf.write(pngfile, arcname)
# add 'parameters' and 'frames' files to the zip archive
zf.writestr("%s/parameters" % container,
'frame_duration = %s' % mov.attrs.FRAME_DURATION)
zf.writestr("%s/frames" % container,
'\n'.join([os.path.basename(p) for p in png_list]))
zf.close()
else:
raise Exception("Specified node is not a Movie")
h5file.close()
# remove the temporary directories
for tmpdir in tmpdir_list:
shutil.rmtree(tmpdir)
def hdf5_to_png(input_url, output_url):
"""
Converts a movie in FACETS HDF5 format to a 'zipped png' format, i.e. a
zipped folder containing one png file for each frame of the movie, plus a
'frames' text file listing the png files in the order they appear in the
movie, and a 'parameters' text file giving the frame_duration parameter.
"""
if not use_hdf5:
raise Exception("PyTables not installed.")
tmpdir_list = []
assert output_url[-3:] == "zip", "output_url must point to a zip file"
assert output_url[0:7] == "file://", "for now, must be a file:// url"
input_protocol = input_url.split("://")[0]
# if remote file, create local copy
if input_protocol != "file":
tmp_dir1 = tempfile.mkdtemp()
tmpdir_list.append(tmp_dir1)
srblib.urlretrieve(input_url, tmp_dir1 + "/tmp.h5")
input_url = "file://" + tmp_dir1 + "/tmp.h5"
# process local hdf5 file
h5file = file_extension.openHDF5File(input_url, "r")
if isinstance(h5file.root.Movie, movie.CMovie):
# export the movie frames as PNG files to a temporary directory
tmp_dir = tempfile.mkdtemp()
tmpdir_list.append(tmp_dir)
mov = h5file.root.Movie
png_list = mov.export("png", "file://" + tmp_dir)
# create and add movie frames to zip archive
output_path = output_url.split("//")[1]
zf = zipfile.ZipFile(output_path, "w", zipfile.ZIP_DEFLATED)
container = os.path.basename(output_path)[:-4] # remove .zip
for pngfile in png_list:
arcname = "%s/%s" % (container, os.path.basename(pngfile))
zf.write(pngfile, arcname)
# add 'parameters' and 'frames' files to the zip archive
zf.writestr("%s/parameters" % container, "frame_duration = %s" % mov.attrs.FRAME_DURATION)
zf.writestr("%s/frames" % container, "\n".join([os.path.basename(p) for p in png_list]))
zf.close()
else:
raise Exception("Specified node is not a Movie")
h5file.close()
# remove the temporary directories
for tmpdir in tmpdir_list:
shutil.rmtree(tmpdir)
def png_to_hdf5(input_url, output_url, title="Movie"):
"""
Creates a series of frames in png format to FACETS HDF5 format.
input_url can be a zip file or a local directory containing png files, a
'frames' text file and a 'parameters' text file.
"""
if not use_hdf5:
raise Exception("PyTables not installed.")
if os.path.splitext(input_url)[1] == ".zip":
tmp_dir = getZipURL(input_url)
container = os.listdir(tmp_dir)[0]
png_dir = "%s/%s/" % (tmp_dir, container)
else:
png_dir = input_url.split("//")[1]
if png_dir[-1] != "/":
png_dir += "/"
frames = _get_frame_list(png_dir)
parameters = _get_parameters(png_dir)
print "Creating movie file with %d frames, saving to %s" % (len(frames), output_url)
h5file = file_extension.openHDF5File(output_url, "w", title=title)
h5file.createCMovie(
h5file.root, "Movie", frames, coding=8, complevel=9, frame_duration=parameters["frame_duration"]
)
h5file.close()
def show(url):
"""Display an HDF5 movie."""
file = file_extension.openHDF5File(url, "r")
file.showMovie("/Movie")
file.close()
def show(url):
"""Display an HDF5 movie."""
file = file_extension.openHDF5File(url, "r")
file.showMovie("/Movie")
file.close()
