def generate_thumbnail(video):
if video.thumbnail:
return
video_filename = os.path.join(settings.MEDIA_ROOT, video.video.name)
# adjust start time to generate thumbnails for smaller videos
video_length = effects.video_length(video_filename)
if effects.Vtime(video_length).total_seconds < 5:
start_at = 0
else:
start_at = 4
command = "ffmpeg -itsoffset -%(start_at)d -i %(video)s" + " -vframes 1 -s 192x108 %(dest)s"
thumbnail_filename = generate_tempfilename(suffix=".jpg")
try:
cmdargs = {"video": video_filename, "dest": thumbnail_filename, "start_at": start_at}
response = subprocess.call(command % cmdargs, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
# Fail silently if ffmpeg is not installed.
# the ffmpeg commandline tool that is.
if response != 0:
logger.error("couldn't generate thumbnail - ffmpeg failed: %s", command % cmdargs)
return
if not os.path.exists(thumbnail_filename):
logger.error("couldn't generate thumbnail - no file " + "generated: %s", command % cmdargs)
return
video.thumbnail.save(os.path.basename(thumbnail_filename), File(file(thumbnail_filename)))
finally:
os.remove(thumbnail_filename)
return True
def test_split_video(self):
"""
Test that a video file can be split and that length of the split file
is correct.
"""
new_filename = effects.split_video(
movie_path('testdata'), "00:00:04", "00:00:04")
self.failUnless(
effects.video_length(new_filename).startswith("00:00:04"))
return new_filename
def test_video_length(self):
self.failUnlessEqual(effects.video_length(movie_path('testdata')),
"00:00:14.78")
def test_split_video_no_duration(self):
new_filename = effects.split_video(
movie_path('testdata'), "00:00:04")
self.failUnlessEqual(effects.video_length(new_filename), "00:00:11.14")
return new_filename
