def main():
proc = subprocess.Popen('which ffmpeg', shell=True, stdout=subprocess.PIPE)
program = proc.stdout.read().strip()
if not program:
raise OSError('ffmpeg not installed!')
libs = bindepend.selectImports(program)
tmpdir = tempfile.mkdtemp()
tar = os.path.join(tmpdir, 'ffmpegbin.tar')
f = tarfile.open(tar, 'w')
f.dereference = True # for Python 2.4 compatibility, this is not in constructor
for _, fn in libs + [('', program)]:
f.add(fn, arcname=os.path.basename(fn))
f.close()
return tmpdir, tar
def freeze_ffmpeg():
"""Archive the ffmpeg binary and its dependencies so it can be copied to
hadoop. The ffmpeg found on the path (i.e. `which ffmpeg`) is used. The
tar file is created in a temp folder and cleaned up automatically.
Returns:
absolute path to a tar file
Raises:
OSError: FFMPEG not found.
Example:
with freeze_ffmpeg() as ffmpegtar:
hadoopy.launch_frozen(hdfs_input, hdfs_output,
'hadoopy_script.py',
files=[ffmpegtar])
"""
proc = subprocess.Popen('which ffmpeg', shell=True, stdout=subprocess.PIPE)
program = proc.stdout.read().strip()
if not program:
raise OSError('ffmpeg not installed!')
libs = bindepend.selectImports(program)
try:
tmpdir = tempfile.mkdtemp()
tar = os.path.join(tmpdir, 'ffmpegbin.tar')
f = tarfile.open(tar, 'w', dereference=True)
for _, fn in libs + [('', program)]:
f.add(fn, arcname=os.path.basename(fn))
f.close()
yield tar
finally:
shutil.rmtree(tmpdir)
