Kamaelia.Codec.RawYUVFramer

• component RawYUVFramer

• Raw YUV video data framer
  • Example Usage
  • More Detail

Raw YUV video data framer

This component takes a raw stream of YUV video data and breaks it into invidual frames. It sends them out one at a time, tagged with relevant data such as the frame size.

Many components that expect uncompressed video require it to be structured into frames in this way, rather than as a raw stream of continuous data. This component fulfills that requirement.

Example Usage

Reading and encoding raw video:

imagesize = (352, 288)        # "CIF" size video

Pipeline(ReadFileAdapter("raw352x288video.yuv", ...other args...),
         RawYUVFramer(imagesize),
         DiracEncoder(preset="CIF"),
        ).activate()

More Detail

Receives raw yuv video data, as strings on its "inbox" inbox.

Sends out individual frames packaged in a dictionary:

{
  "yuv" : (y_data, u_data, v_data),  # a tuple of strings
  "size" : (width, height),          # in pixels
  "pixformat" : "YUV420_planar",     # raw video data format
}

The component will terminate if it receives a shutdownMicroprocess or producerFinished message on its "control" inbox. The message is passed on out of the "signal" outbox.

---

Kamaelia.Codec.RawYUVFramer.RawYUVFramer

class RawYUVFramer(Axon.Component.component)

RawYUVFramer(size,pixformat) -> raw yuv video data framing component

Creates a component that frames a raw stream of YUV video data into frames.

Keyword arguments:

• size -- (width,height) size of a video frame in pixels
• pixformat -- raw video data format (default="YUV420_Planar")

Inboxes

Outboxes

Methods defined here

__init__(self, size[, pixformat])

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

flushFrame(self)

Send out a frame, flushing buffers

main(self)

Main loop

packAndSend(self, raw)

packAndSend(raw) -> None

Pack incoming raw data into y,u,v planes, and triggers a flush when all planes are full.