414 lines
14 KiB
Python
414 lines
14 KiB
Python
"""
|
|
Author: Jaisen Mathai <jaisen@jmathai.com>
|
|
Video package that handles all video operations
|
|
"""
|
|
|
|
# load modules
|
|
from distutils.spawn import find_executable
|
|
import tempfile
|
|
from datetime import datetime
|
|
|
|
import os
|
|
import re
|
|
import shutil
|
|
import subprocess
|
|
import time
|
|
|
|
from elodie import constants
|
|
from elodie import plist_parser
|
|
from media import Media
|
|
|
|
|
|
class Video(Media):
|
|
__name__ = 'Video'
|
|
extensions = ('avi', 'm4v', 'mov', 'mp4', '3gp')
|
|
|
|
"""
|
|
@param, source, string, The fully qualified path to the video file
|
|
"""
|
|
def __init__(self, source=None):
|
|
super(Video, self).__init__(source)
|
|
|
|
"""
|
|
Get path to executable avmetareadwrite binary.
|
|
We wrap this since we call it in a few places and we do a fallback.
|
|
|
|
@returns, None or string
|
|
"""
|
|
def get_avmetareadwrite(self):
|
|
avmetareadwrite = find_executable('avmetareadwrite')
|
|
if(avmetareadwrite is None):
|
|
avmetareadwrite = '/usr/bin/avmetareadwrite'
|
|
if(not os.path.isfile(avmetareadwrite) or not os.access(avmetareadwrite, os.X_OK)): # noqa
|
|
return None
|
|
|
|
return avmetareadwrite
|
|
|
|
"""
|
|
Get latitude or longitude of photo from EXIF
|
|
|
|
@returns, time object or None for non-video files or 0 timestamp
|
|
"""
|
|
def get_coordinate(self, type='latitude'):
|
|
exif_data = self.get_exif()
|
|
if(exif_data is None):
|
|
return None
|
|
|
|
coords = re.findall('(GPS %s +: .+)' % type.capitalize(), exif_data)
|
|
if(coords is None or len(coords) == 0):
|
|
return None
|
|
|
|
coord_string = coords[0]
|
|
coordinate = re.findall('([0-9.]+)', coord_string)
|
|
direction = re.search('[NSEW]$', coord_string)
|
|
if(coordinate is None or direction is None):
|
|
return None
|
|
|
|
direction = direction.group(0)
|
|
|
|
decimal_degrees = float(coordinate[0]) + float(coordinate[1])/60 + float(coordinate[2])/3600 # noqa
|
|
if(direction == 'S' or direction == 'W'):
|
|
decimal_degrees = decimal_degrees * -1
|
|
|
|
return decimal_degrees
|
|
|
|
"""
|
|
Get the date which the video was taken.
|
|
The date value returned is defined by the min() of mtime and ctime.
|
|
|
|
@returns, time object or None for non-video files or 0 timestamp
|
|
"""
|
|
def get_date_taken(self):
|
|
if(not self.is_valid()):
|
|
return None
|
|
|
|
source = self.source
|
|
# We need to parse a string from EXIF into a timestamp.
|
|
# We use date.strptime -> .timetuple -> time.mktime to do the
|
|
# conversion in the local timezone
|
|
# If the time is not found in EXIF we update EXIF
|
|
seconds_since_epoch = min(os.path.getmtime(source), os.path.getctime(source)) # noqa
|
|
exif_data = self.get_exif()
|
|
for key in ['Creation Date', 'Media Create Date']:
|
|
date = re.search('%s +: +([0-9: ]+)' % key, exif_data)
|
|
if(date is not None):
|
|
date_string = date.group(1)
|
|
try:
|
|
exif_seconds_since_epoch = time.mktime(
|
|
datetime.strptime(
|
|
date_string,
|
|
'%Y:%m:%d %H:%M:%S'
|
|
).timetuple()
|
|
)
|
|
if(exif_seconds_since_epoch < seconds_since_epoch):
|
|
seconds_since_epoch = exif_seconds_since_epoch
|
|
break
|
|
except:
|
|
pass
|
|
|
|
if(seconds_since_epoch == 0):
|
|
return None
|
|
|
|
return time.gmtime(seconds_since_epoch)
|
|
|
|
"""
|
|
Get the duration of a video in seconds.
|
|
Uses ffmpeg/ffprobe
|
|
|
|
@returns, string or None for a non-video file
|
|
"""
|
|
def get_duration(self):
|
|
if(not self.is_valid()):
|
|
return None
|
|
|
|
source = self.source
|
|
result = subprocess.Popen(
|
|
['ffprobe', source],
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.STDOUT
|
|
)
|
|
for key in result.stdout.readlines():
|
|
if 'Duration' in key:
|
|
return re.search(
|
|
'(\d{2}:\d{2}.\d{2})',
|
|
key
|
|
).group(1).replace('.', ':')
|
|
return None
|
|
|
|
"""
|
|
Get exif data from video file.
|
|
Not all video files have exif and this currently relies on
|
|
the CLI exiftool program
|
|
|
|
@returns, string or None if exiftool is not found
|
|
"""
|
|
def get_exif(self):
|
|
exiftool = self.get_exiftool()
|
|
if(exiftool is None):
|
|
return None
|
|
|
|
source = self.source
|
|
process_output = subprocess.Popen(
|
|
['%s "%s"' % (exiftool, source)],
|
|
stdout=subprocess.PIPE,
|
|
shell=True
|
|
)
|
|
return process_output.stdout.read()
|
|
|
|
"""
|
|
Check the file extension against valid file extensions as
|
|
returned by self.extensions
|
|
|
|
@returns, boolean
|
|
"""
|
|
def is_valid(self):
|
|
source = self.source
|
|
return os.path.splitext(source)[1][1:].lower() in self.extensions
|
|
|
|
"""
|
|
Set the date/time a photo was taken
|
|
|
|
@param, time, datetime, datetime object of when the photo was taken
|
|
|
|
@returns, boolean
|
|
"""
|
|
def set_date_taken(self, date_taken_as_datetime):
|
|
if(time is None):
|
|
return False
|
|
|
|
source = self.source
|
|
|
|
result = self.__update_using_plist(time=date_taken_as_datetime)
|
|
if(result is True):
|
|
os.utime(
|
|
source,
|
|
(
|
|
int(time.time()),
|
|
time.mktime(date_taken_as_datetime.timetuple())
|
|
)
|
|
)
|
|
|
|
return result
|
|
|
|
"""
|
|
Set lat/lon for a video
|
|
|
|
@param, latitude, float, Latitude of the file
|
|
@param, longitude, float, Longitude of the file
|
|
|
|
@returns, boolean
|
|
"""
|
|
def set_location(self, latitude, longitude):
|
|
if(latitude is None or longitude is None):
|
|
return False
|
|
|
|
result = self.__update_using_plist(latitude=latitude, longitude=longitude) # noqa
|
|
return result
|
|
|
|
"""
|
|
Set title for a video
|
|
|
|
@param, title, string, Title for the file
|
|
|
|
@returns, boolean
|
|
"""
|
|
|
|
def set_title(self, title):
|
|
if(title is None):
|
|
return False
|
|
|
|
result = self.__update_using_plist(title=title)
|
|
return result
|
|
|
|
"""
|
|
Updates video metadata using avmetareadwrite.
|
|
This method is a does a lot more than it should.
|
|
The general steps are...
|
|
1) Check if avmetareadwrite is installed
|
|
2) Export a plist file to a temporary location from the source file
|
|
3) Regex replace values in the plist file
|
|
4) Update the source file using the updated plist and save it to a
|
|
temporary location
|
|
5) Validate that the metadata in the updated temorary movie is valid
|
|
6) Copystat permission and time bits from the source file to the
|
|
temporary movie
|
|
7) Move the temporary file to overwrite the source file
|
|
|
|
@param, latitude, float, Latitude of the file
|
|
@param, longitude, float, Longitude of the file
|
|
|
|
@returns, boolean
|
|
"""
|
|
def __update_using_plist(self, **kwargs):
|
|
if(
|
|
'latitude' not in kwargs and
|
|
'longitude' not in kwargs and
|
|
'time' not in kwargs and
|
|
'title' not in kwargs
|
|
):
|
|
if(constants.debug is True):
|
|
print 'No lat/lon passed into __create_plist'
|
|
return False
|
|
|
|
avmetareadwrite = self.get_avmetareadwrite()
|
|
if(avmetareadwrite is None):
|
|
if(constants.debug is True):
|
|
print 'Could not find avmetareadwrite'
|
|
return False
|
|
|
|
source = self.source
|
|
|
|
# First we need to write the plist for an existing file
|
|
# to a temporary location
|
|
with tempfile.NamedTemporaryFile() as plist_temp:
|
|
# We need to write the plist file in a child process
|
|
# but also block for it to be complete.
|
|
# http://stackoverflow.com/a/5631819/1318758
|
|
avmetareadwrite_generate_plist_command = '%s -p "%s" "%s"' % (
|
|
avmetareadwrite,
|
|
plist_temp.name,
|
|
source
|
|
)
|
|
write_process = subprocess.Popen(
|
|
[avmetareadwrite_generate_plist_command],
|
|
stdout=subprocess.PIPE,
|
|
shell=True
|
|
)
|
|
write_process.communicate()
|
|
if(write_process.returncode != 0):
|
|
if(constants.debug is True):
|
|
print 'Failed to generate plist file'
|
|
return False
|
|
|
|
plist = plist_parser.Plist(plist_temp.name)
|
|
# Depending on the kwargs that were passed in we regex
|
|
# the plist_text before we write it back.
|
|
plist_should_be_written = False
|
|
if('latitude' in kwargs and 'longitude' in kwargs):
|
|
latitude = str(abs(kwargs['latitude'])).lstrip('0')
|
|
longitude = kwargs['longitude']
|
|
|
|
# Add a literal '+' to the lat/lon if it is positive.
|
|
# Do this first because we convert longitude to a string below.
|
|
lat_sign = '+' if latitude > 0 else '-'
|
|
# We need to zeropad the longitude.
|
|
# No clue why - ask Apple.
|
|
# We set the sign to + or - and then we take the absolute value
|
|
# and fill it.
|
|
lon_sign = '+' if longitude > 0 else '-'
|
|
longitude_str = '{:9.5f}'.format(abs(longitude)).replace(' ', '0') # noqa
|
|
lat_lon_str = '%s%s%s%s' % (
|
|
lat_sign,
|
|
latitude,
|
|
lon_sign,
|
|
longitude_str
|
|
)
|
|
|
|
plist.update_key('common/location', lat_lon_str)
|
|
plist_should_be_written = True
|
|
|
|
if('time' in kwargs):
|
|
# The time formats can be YYYY-mm-dd or YYYY-mm-dd hh:ii:ss
|
|
time_parts = str(kwargs['time']).split(' ')
|
|
ymd, hms = [None, None]
|
|
if(len(time_parts) >= 1):
|
|
ymd = [int(x) for x in time_parts[0].split('-')]
|
|
|
|
if(len(time_parts) == 2):
|
|
hms = [int(x) for x in time_parts[1].split(':')]
|
|
|
|
if(hms is not None):
|
|
d = datetime(ymd[0], ymd[1], ymd[2], hms[0], hms[1], hms[2]) # noqa
|
|
else:
|
|
d = datetime(ymd[0], ymd[1], ymd[2], 12, 00, 00)
|
|
|
|
offset = time.strftime("%z", time.gmtime(time.time()))
|
|
time_string = d.strftime('%Y-%m-%dT%H:%M:%S{}'.format(offset)) # noqa
|
|
plist.update_key('common/creationDate', time_string)
|
|
plist_should_be_written = True
|
|
|
|
if('title' in kwargs):
|
|
if(len(kwargs['title']) > 0):
|
|
plist.update_key('common/title', kwargs['title'])
|
|
plist_should_be_written = True
|
|
|
|
if(plist_should_be_written is True):
|
|
plist_final = plist_temp.name
|
|
plist.write_file(plist_final)
|
|
else:
|
|
if(constants.debug is True):
|
|
print 'Nothing to update, plist unchanged'
|
|
return False
|
|
|
|
# We create a temporary file to save the modified file to.
|
|
# If the modification is successful we will update the
|
|
# existing file.
|
|
# We can't call self.get_metadata else we will run into
|
|
# infinite loops
|
|
# metadata = self.get_metadata()
|
|
temp_movie = None
|
|
with tempfile.NamedTemporaryFile() as temp_file:
|
|
temp_movie = '%s.%s' % (temp_file.name, self.get_extension())
|
|
|
|
# We need to block until the child process completes.
|
|
# http://stackoverflow.com/a/5631819/1318758
|
|
avmetareadwrite_command = '%s -a %s "%s" "%s"' % (
|
|
avmetareadwrite,
|
|
plist_final,
|
|
source,
|
|
temp_movie
|
|
)
|
|
update_process = subprocess.Popen(
|
|
[avmetareadwrite_command],
|
|
stdout=subprocess.PIPE,
|
|
shell=True
|
|
)
|
|
update_process.communicate()
|
|
if(update_process.returncode != 0):
|
|
if(constants.debug is True):
|
|
print '%s did not complete successfully' % avmetareadwrite_command # noqa
|
|
return False
|
|
|
|
# Before we do anything destructive we confirm that the
|
|
# file is in tact.
|
|
check_media = Video(temp_movie)
|
|
check_metadata = check_media.get_metadata()
|
|
if(
|
|
(
|
|
'latitude' in kwargs and
|
|
'longitude' in kwargs and
|
|
check_metadata['latitude'] is None and
|
|
check_metadata['longitude'] is None
|
|
) or (
|
|
'time' in kwargs and
|
|
check_metadata['date_taken'] is None
|
|
)
|
|
):
|
|
if(constants.debug is True):
|
|
print 'Something went wrong updating video metadata'
|
|
return False
|
|
|
|
# Copy file information from original source to temporary file
|
|
# before copying back over
|
|
shutil.copystat(source, temp_movie)
|
|
stat = os.stat(source)
|
|
shutil.move(temp_movie, source)
|
|
os.utime(source, (stat.st_atime, stat.st_mtime))
|
|
|
|
return True
|
|
|
|
"""
|
|
Static method to access static __valid_extensions variable.
|
|
|
|
@returns, tuple
|
|
"""
|
|
@classmethod
|
|
def get_valid_extensions(cls):
|
|
return cls.extensions
|
|
|
|
|
|
class Transcode(object):
|
|
# Constructor takes a video object as it's parameter
|
|
def __init__(self, video=None):
|
|
self.video = video
|