def navdata2video( inputFile, outputFile, outDir = ".", dumpIndividualFrames=False, startIndex=0 ):
data = open(inputFile, "rb").read()
arr = []
while len(data) > 0:
packet, data = cutPacket( data )
if videoAckRequired( packet ):
frameNumber, frameFlags, fragmentNumber = struct.unpack("<HBB", packet[7:11])
arr.append( (frameNumber, fragmentNumber, packet[12:]) )
vf = open(outputFile, "wb")
prev = None
frameIndex = startIndex
frame = ""
for a in sorted(arr):
if prev != a[:2]:
if prev is not None and prev[0] != a[0]:
# new frame
if dumpIndividualFrames:
fout = open(outDir+os.sep+"frame%04d.bin" % frameIndex, "wb")
fout.write(frame)
fout.close()
frame = ""
frameIndex += 1
frame += a[2]
vf.write(a[2])
else:
print "duplicity", prev
prev = a[:2]
vf.close()
def navdata2video(inputFile,
outputFile,
outDir=".",
dumpIndividualFrames=False,
startIndex=0,
frameExt=".bin"):
data = open(inputFile, "rb").read()
out = open(outputFile, "wb")
vf = VideoFrames()
frameIndex = startIndex
while len(data) > 0:
packet, data = cutPacket(data)
if videoAckRequired(packet):
vf.append(packet)
frame = vf.getFrame()
if frame:
if dumpIndividualFrames:
fout = open(
outDir + os.sep + ("frame%04d" % frameIndex) + frameExt,
"wb")
fout.write(frame)
fout.close()
frameIndex += 1
out.write(frame)
out.close()
vf.stat()
def append(self, packet):
"append video packet with piece of frame"
assert videoAckRequired(packet)
frameNumber, frameFlags, fragmentNumber, fragmentsPerFrame = struct.unpack("<HBBB", packet[7:12])
data = packet[12:]
if frameNumber != self.currentFrameNumber:
if self.currentFrameNumber is not None and self.parts is not None:
s = ""
complete = True
for i, d in enumerate(self.parts):
if d is None:
if self.verbose:
print (self.currentFrameNumber, i, len(self.parts))
complete = False
continue
s += d
if complete:
self.frames.append((self.currentFrameNumber, self.currentFrameFlags, s))
if self.verbose:
print "processing", frameNumber
if self.statFirst is None:
self.statFirst = frameNumber
self.statLast = frameNumber
self.statCount += 1
self.currentFrameNumber = frameNumber
self.currentFrameFlags = frameFlags
if self.onlyIFrames and frameFlags != 1:
self.parts = None
else:
self.parts = [None] * fragmentsPerFrame
if not self.onlyIFrames or frameFlags == 1:
if self.parts[fragmentNumber] is not None:
if self.verbose:
print "duplicity", (frameNumber, fragmentNumber)
self.parts[fragmentNumber] = data
def append( self, packet ):
"append video packet with piece of frame"
assert videoAckRequired( packet )
frameNumber, frameFlags, fragmentNumber, fragmentsPerFrame = struct.unpack("<HBBB", packet[7:12])
data = packet[12:]
if frameNumber != self.currentFrameNumber:
if self.currentFrameNumber is not None and self.parts is not None:
s = ""
complete = True
for i,d in enumerate(self.parts):
if d is None:
if self.verbose:
print (self.currentFrameNumber, i, len(self.parts))
complete = False
continue
s += d
if complete:
self.frames.append( (self.currentFrameNumber, self.currentFrameFlags, s) )
if self.verbose:
print "processing", frameNumber
if self.statFirst is None:
self.statFirst = frameNumber
self.statLast = frameNumber
self.statCount += 1
self.currentFrameNumber = frameNumber
self.currentFrameFlags = frameFlags
if self.onlyIFrames and frameFlags != 1:
self.parts = None
else:
self.parts = [None]*fragmentsPerFrame
if not self.onlyIFrames or frameFlags == 1:
if self.parts[ fragmentNumber ] is not None:
if self.verbose:
print "duplicity", (frameNumber, fragmentNumber)
self.parts[ fragmentNumber ] = data
def navdata2video(inputFile, outputFile, outDir=".", dumpIndividualFrames=False, startIndex=0, frameExt=".bin"):
data = open(inputFile, "rb").read()
out = open(outputFile, "wb")
vf = VideoFrames()
frameIndex = startIndex
while len(data) > 0:
packet, data = cutPacket(data)
if videoAckRequired(packet):
vf.append(packet)
frame = vf.getFrame()
if frame:
if dumpIndividualFrames:
fout = open(outDir + os.sep + ("frame%04d" % frameIndex) + frameExt, "wb")
fout.write(frame)
fout.close()
frameIndex += 1
out.write(frame)
out.close()
vf.stat()
