def jpg_info(filename):
"""
Reads a single jpeg image from the file *filename* and extracts the Axis user data header.
The information it contains is returned as a dict with the keys "hwid", "serial_numer" and
"firmware_version".
"""
if sys.version_info > (3, ):
filename = bytes(filename, "utf8")
m = ffi.new("struct mjpg *")
r = lib.mjpg_open(m, filename, lib.IMTYPE_GRAY, lib.IMORDER_PLANAR)
lib.mjpg_next_head(m)
res = {
'hwid': ffi.string(m.hwid),
'serial_number': ffi.string(m.serial),
'firmware_version': ffi.string(m.firmware),
'timestamp': m.timestamp_sec + m.timestamp_usec / 1000000.0
}
lib.mjpg_close(m)
return res
def firmware_version(self):
"""
The firmware version running in the camera when it made this recording.
"""
self.myiter.next()
return ffi.string(self.myiter.m.firmware)
def serial_number(self):
"""
The Axis serial number or mac address of the camera that made this recording.
"""
self.myiter.next()
return ffi.string(self.myiter.m.serial)
def hwid(self):
"""
The Axis hardware id of the camera that made this recording.
"""
self.myiter.next()
return ffi.string(self.myiter.m.hwid)
def firmware_version(self):
"""
The firmware version running in the camera when it made this recording.
"""
self.myiter.next()
return ffi.string(self.myiter.m.firmware)
def serial_number(self):
"""
The Axis serial number or mac address of the camera that made this recording.
"""
self.myiter.next()
return ffi.string(self.myiter.m.serial)
def hwid(self):
"""
The Axis hardware id of the camera that made this recording.
"""
self.myiter.next()
return ffi.string(self.myiter.m.hwid)
