def video_create_poster(videopath, poster, video_data):
''' Grab a JPEG snapshot of the video
'''
output = ""
thumbnailfile = NamedTemporaryFile(suffix='.jpg')
try:
request = datetime.strptime(PHOTOLOGUE_POSTER_TIME, '%H:%M:%S.%f')
except:
request = datetime.strptime(PHOTOLOGUE_POSTER_TIME, '%H:%M:%S')
requested_time = (datetime.combine(datetime.min, request.time()) - datetime.min).total_seconds()
# Is requested time after video end?
# There is some rounding in process, we need to make shure we are safe
if video_data['duration'] - 1 < requested_time:
poster_time = str(timedelta(seconds=video_data['duration']/2.0))
else:
poster_time = PHOTOLOGUE_POSTER_TIME
grabimage = ( '%(ffmpeg)s -y -i "%(infile)s" '
'-vframes 1 -ss %(postertime)s -an '
'-vcodec mjpeg -f rawvideo '
'%(filt)s -s %(size)s %(outfile)s'
) % dict(
ffmpeg=FFMPEG,
infile=videopath,
postertime=poster_time,
outfile=thumbnailfile.name,
filt=construct_filter(video_data['deinterlace']),
size="%dx%d" % (video_data['orig_w'], video_data['orig_h'])
)
(message, retval) = execute(grabimage, "-------------------- GRAB IMAGE ------------------")
output += message
if retval:
raise Exception('Creating poster have failed\n\n' + output)
s = os.stat(thumbnailfile.name)
fsize = s.st_size
if (fsize == 0):
output += "Target file is 0 bytes conversion failed?\n"
raise Exception('Poster creation have failed(file zero size)\n\n' + output)
# Replace part after last dot by 'png'
name = os.path.basename(videopath)
dot = name.rfind('.')
if dot != -1:
name = name[:dot]
name = os.path.join("poster", name+'.jpg')
# Import poster_unconverted here
from photologue.models.video import poster_unconverted
if poster_unconverted(poster):
poster.remove_deleted = False
# Store file and save
poster.file.save(name, File(thumbnailfile))
return output
def update_files():
"""
Set name and mtime of all files associated to media items to title_slug and date_taken.
"""
for item in GalleryItemBase.objects.all():
update_item(item, item.title_slug)
if hasattr(item, 'poster'):
if not poster_unconverted(item.poster):
update_item(item.poster, item.title_slug)
