def ProcessEditDecision(tmpFilePath, edit, width, height):
"""\
Prefab.
Applies an edit decision - reading in the relevant video frames and applying
the reframing. Outputs the reframed video frames out of the "outbox" outbox.
Arguments:
- tmpFilePath -- temp directory into which video frames have been saved
- edit -- the edit instruction (dictionary containing: "start","end","left","top","right","bottom")
- width -- width (in pixels) for output video frames
- height -- height (in pixels) for output video frames
Inboxes:
- "inbox" -- NOT USED
- "control" -- Shutdown signalling
Outboxes:
- "outbox" -- NOT USED
- "signal" -- Shutdown signalling
"""
print " Video segment: ", edit
filenames = [
tmpFilePath + "%08d.yuv" % i
for i in range(edit["start"], edit["end"] + 1)
]
newsize = (width, height)
cropbounds = (edit["left"], edit["top"], edit["right"], edit["bottom"])
return Graphline( \
FILENAMES = ForwardIteratingChooser(filenames),
FRAME_LOADER = Carousel( lambda filename :
Pipeline(
2, MaxSpeedFileReader(filename,chunksize=1024*1024),
2, YUV4MPEGToFrame(),
),
make1stRequest=False ),
REFRAMING = Pipeline( 2, ToRGB_interleaved(),
2, CropAndScale(newsize, cropbounds),
2, ToYUV420_planar(),
),
linkages = {
("FRAME_LOADER", "requestNext") : ("FILENAMES", "inbox"),
("FILENAMES", "outbox") : ("FRAME_LOADER", "next"),
("FRAME_LOADER", "outbox") : ("REFRAMING", "inbox"),
("REFRAMING", "outbox") : ("", "outbox"),
("FILENAMES", "signal") : ("FRAME_LOADER", "control"),
("FRAME_LOADER", "signal") : ("REFRAMING", "control"),
("REFRAMING", "signal") : ("", "signal"),
},
boxsizes = {
},
)
def capture_one(self):
self.snapshot = None
self.snapshot = self.camera.get_image()
def main(self):
self.camera.start()
while 1:
self.capture_one()
self.send(self.snapshot, "outbox")
time.sleep(self.delay)
if __name__ == "__main__":
from Kamaelia.Chassis.Pipeline import Pipeline
from Kamaelia.File.Writing import SimpleFileWriter
from Kamaelia.Codec.Dirac import DiracEncoder
from Kamaelia.Video.PixFormatConversion import ToYUV420_planar
from Kamaelia.Util.PureTransformer import PureTransformer
Pipeline(
VideoCaptureSource(),
PureTransformer(lambda F : \
{"rgb" : pygame.image.tostring(F, "RGB"),
"size" : (352, 288),
"pixformat" : "RGB_interleaved",
}),
ToYUV420_planar(),
DiracEncoder(preset="CIF", encParams={"num_L1":0}),
SimpleFileWriter("X.drc"),
).run()