def test_iter():
timestamps = []
pixels = []
video = Mkv(test_mkv)
if os.path.exists(index_file(test_mkv)):
os.unlink(index_file(test_mkv))
for i, img in enumerate(video):
assert img.index == i
timestamps.append(img.timestamp)
pixels.append(img[20, 30, 1])
assert len(timestamps) == 16
assert timestamps[0] == 0.0 # FIXME: Use systeime
assert timestamps[1] == 0.04
assert pixels[:6] == [84, 85, 85, 84, 84, 86]
pixels = [video[i][20, 30, 1] for i in range(6)]
assert pixels == [84, 85, 85, 84, 84, 86]
assert video[2].timestamp == 0.08
assert video[1].timestamp == 0.04
assert video[2].index == 2
assert video[0][20, 30, 1] == 84
video2 = Mkv(test_mkv)
assert video[3][20, 30, 1] == 84
assert len(video) == 16
with raises(IndexError):
video[100]
def test_mjpg_codec_grey():
systimes = []
video = Mkv(mjpg_codec_mkv, grey=True)
for img in video:
systimes.append(img.systime)
assert img.shape == (300, 480)
assert systimes == [1539001990.82, 1539001991.82, 1539001992.82]
def test_systime():
video = Mkv(systime_mkv)
assert video[7].systime == 1448984844.6525
t = [img.systime for img in video]
assert t == video.systimes
cut = video[10:20]
assert t[10:20] == cut.systimes
def test_mkv_systime():
video = VideoFilter(Mkv(systime_mkv), lambda f: f[:])
assert video[7].systime == 1448984844.6525
t = [img.systime for img in video]
assert t == video.systimes
cut = video[10:20]
assert t[10:20] == cut.systimes
def test_getitem():
video = Mkv(systime_mkv)
idx = 31
for i in range(3):
assert video[idx - 1].index == idx - 1
for i in range(3):
assert video[idx].index == idx
for i in range(3):
assert video[idx + 1].index == idx + 1
def test_mkv_getitem():
video = VideoFilter(Mkv(systime_mkv), lambda f: f[:])
idx = 31
for i in range(3):
assert video[idx - 1].index == idx - 1
for i in range(3):
assert video[idx].index == idx
for i in range(3):
assert video[idx + 1].index == idx + 1
def test_mjpg_codec():
systimes = []
video = Mkv(mjpg_codec_mkv)
for img in video:
systimes.append(img.systime)
assert img.shape == (300, 480, 3)
assert video[0].systime == 1539001990.82
assert video[2].systime == 1539001992.82
assert video[1].systime == 1539001991.82
assert systimes == [1539001990.82, 1539001991.82, 1539001992.82]
def Video(filename, grey=False):
"""
Creates a *View* object representing the video in the file *filename*.
See Overview above.
"""
if filename.endswith('.mkv'):
from vi3o.mkv import Mkv
return Mkv(filename, grey)
elif filename.endswith('.mjpg'):
from vi3o.mjpg import Mjpg
return Mjpg(filename, grey)
else:
from vi3o.opencv import CvVideo
return CvVideo(filename, grey)
def test_pickle():
video = Mkv(systime_mkv)
t8 = video[8].systime
assert t8 > 10000
sub = video[6::2]
assert sub[1].systime == t8
assert video.myiter is not None
with NamedTemporaryFile() as tmp:
with open(tmp.name, "wb") as fd:
pickle.dump(sub, fd)
loaded = pickle.load(open(tmp.name, "rb"))
assert loaded[1].systime == t8
def Video(filename, grey=False):
"""
Creates a *Video* object representing the video in the file *filename*.
See Overview above.
"""
from vi3o.mkv import Mkv, UnsupportedFormatError as MkvUnsupported
try:
return Mkv(filename, grey)
except MkvUnsupported:
pass
from vi3o.mjpg import Mjpg, UnsupportedFormatError as MjpgUnsupported
try:
return Mjpg(filename, grey)
except MjpgUnsupported:
pass
from vi3o.imageio import ImageioVideo
return ImageioVideo(filename, grey)
def Video(filename, grey=False):
"""
Creates a *Video* object representing the video in the file *filename*.
See Overview above.
"""
# Be compatible with pathlib.Path filenames
filename = str(filename)
if filename.endswith('.mkv'):
from vi3o.mkv import Mkv
return Mkv(filename, grey)
elif filename.endswith('.mjpg'):
from vi3o.mjpg import Mjpg
return Mjpg(filename, grey)
elif filename.endswith('recording.xml'):
from vi3o.recording import read_recording_xml, Recording
return Recording(read_recording_xml(filename), grey=grey)
else:
from vi3o.imageio import ImageioVideo
return ImageioVideo(filename, grey)
def test_slice():
video = Mkv(test_mkv)
sub = video[2:5]
assert [img[20, 30, 1] for img in sub] == [85, 84, 84]
assert sub[1].timestamp == video[3].timestamp
assert len(sub) == 3
def test_no_file():
with raises(IOError):
Mkv(test_mkv + 'not_there')
def test_mkv_pathlib_open():
_ = Mkv(pathlib.Path(test_mkv))
def test_no_serial_number():
assert Mkv(test_mkv).serial_number == b''
def test_serial_number():
assert Mkv(mac_mkv).serial_number == b'ACCC8E19244E'