115 lines
3.8 KiB
Python
115 lines
3.8 KiB
Python
"""
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The video module contains the :class:`Video` class, which represents video
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objects (AVI, MOV, etc.).
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.. moduleauthor:: Jaisen Mathai <jaisen@jmathai.com>
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"""
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# load modules
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from distutils.spawn import find_executable
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from datetime import datetime
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import os
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import re
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import time
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from media import Media
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class Video(Media):
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"""A video object.
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:param str source: The fully qualified path to the video file.
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"""
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__name__ = 'Video'
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#: Valid extensions for video files.
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extensions = ('avi', 'm4v', 'mov', 'mp4', 'mpg', 'mpeg', '3gp')
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def __init__(self, source=None):
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super(Video, self).__init__(source)
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self.exif_map['date_taken'] = [
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'QuickTime:CreationDate',
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'QuickTime:CreationDate-und-US',
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'QuickTime:MediaCreateDate'
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]
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self.title_key = 'XMP:DisplayName'
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self.latitude_keys = [
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'XMP:GPSLatitude',
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# 'QuickTime:GPSLatitude',
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'Composite:GPSLatitude'
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]
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self.longitude_keys = [
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'XMP:GPSLongitude',
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# 'QuickTime:GPSLongitude',
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'Composite:GPSLongitude'
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]
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self.latitude_ref_key = 'EXIF:GPSLatitudeRef'
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self.longitude_ref_key = 'EXIF:GPSLongitudeRef'
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self.set_gps_ref = False
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def get_avmetareadwrite(self):
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"""Get path to executable avmetareadwrite binary.
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We wrap this since we call it in a few places and we do a fallback.
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:returns: None or string
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"""
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avmetareadwrite = find_executable('avmetareadwrite')
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if(avmetareadwrite is None):
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avmetareadwrite = '/usr/bin/avmetareadwrite'
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if(not os.path.isfile(avmetareadwrite) or not os.access(avmetareadwrite, os.X_OK)): # noqa
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return None
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return avmetareadwrite
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def get_date_taken(self):
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"""Get the date which the photo was taken.
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The date value returned is defined by the min() of mtime and ctime.
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:returns: time object or None for non-photo files or 0 timestamp
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"""
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if(not self.is_valid()):
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return None
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source = self.source
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seconds_since_epoch = min(os.path.getmtime(source), os.path.getctime(source)) # noqa
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exif = self.get_exiftool_attributes()
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for date_key in self.exif_map['date_taken']:
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if date_key in exif:
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# Example date strings we want to parse
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# 2015:01:19 12:45:11-08:00
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# 2013:09:30 07:06:05
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date = re.search('([0-9: ]+)([-+][0-9:]+)?', exif[date_key])
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if(date is not None):
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date_string = date.group(1)
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date_offset = date.group(2)
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try:
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exif_seconds_since_epoch = time.mktime(
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datetime.strptime(
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date_string,
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'%Y:%m:%d %H:%M:%S'
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).timetuple()
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)
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if(exif_seconds_since_epoch < seconds_since_epoch):
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seconds_since_epoch = exif_seconds_since_epoch
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if date_offset is not None:
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offset_parts = date_offset[1:].split(':')
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offset_seconds = int(offset_parts[0]) * 3600
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offset_seconds = offset_seconds + int(offset_parts[1]) * 60 # noqa
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if date_offset[0] == '-':
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seconds_since_epoch - offset_seconds
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elif date_offset[0] == '+':
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seconds_since_epoch + offset_seconds
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except:
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pass
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if(seconds_since_epoch == 0):
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return None
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return time.gmtime(seconds_since_epoch)
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