InputMPEGStream Class Reference

InputMPEGStream is a wrapper class to read video frames from mpeg-1. More...

#include <Media/MpegInputStream.H>

Inheritance diagram for InputMPEGStream:

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Collaboration diagram for InputMPEGStream:

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List of all members.

Public Member Functions
	InputMPEGStream (OptionManager &mgr, const std::string &descrName="Input MPEG Stream", const std::string &tagName="InputMPEGStream")
	Construct an mpegstream object for mpeg input.
virtual	~InputMPEGStream ()
	Virtual destructor.
virtual void	setConfigInfo (const std::string &filename)
	Override from FrameIstream; just calls setFileName().
virtual bool	setFrameNumber (int n)
	override the base class version so we can seek to the proper frame number
virtual GenericFrameSpec	peekFrameSpec ()
	get frame specifications, peeking at the first frame if necessary
void	setFileName (std::string fname)
	Configure the MPEG Stream for decoding.
virtual GenericFrame	readFrame ()
	Read the next frame from the mpeg stream.
virtual Image< PixRGB< byte > >	readRGB ()
	Read the next frame from the mpeg stream.
virtual bool	readAndDiscardFrame ()
	Read a frame from the stream and discard it.
VideoFrame	readVideoFrame ()
	Get the next raw VideoFrame from the stream.
Protected Member Functions
void	stop2 ()
	get stopped; close any open write stream
Protected Attributes
NModelParam< int >	itsBuffLen
OModelParam< std::string >	itsCodecName
OModelParam< bool >	itsDoPreload
std::string	itsFileName

Detailed Description

InputMPEGStream is a wrapper class to read video frames from mpeg-1.

InputMPEGStream is a wrapper class to read video frames from mpeg-1, mpeg-4 (aka divx), asf, avi, mov and any other format that mplayer can decode. Audio streams are entirely ignored.

Definition at line 57 of file MpegInputStream.H.

Constructor & Destructor Documentation

InputMPEGStream::InputMPEGStream	(	OptionManager &	mgr,
		const std::string &	descrName = `"Input MPEG Stream"`,
		const std::string &	tagName = `"InputMPEGStream"`
	)

Construct an mpegstream object for mpeg input.

Definition at line 94 of file MpegInputStream.C.

InputMPEGStream::~InputMPEGStream ( ) [virtual]

Virtual destructor.

Definition at line 107 of file MpegInputStream.C.

Member Function Documentation

GenericFrameSpec InputMPEGStream::peekFrameSpec ( ) [virtual]

get frame specifications, peeking at the first frame if necessary

Implements FrameIstream.

Definition at line 140 of file MpegInputStream.C.

References ASSERT, and MovieDecoder::peekFrameSpec().

bool InputMPEGStream::readAndDiscardFrame ( ) [virtual]

Read a frame from the stream and discard it.

If you know you are going to discard the frame (e.g. to skip ahead to a certain frame number, or to count the frame), then it is more efficient to call readAndDiscardFrame() than to call readVideoFrame() or readRGB() but ignore the result.

Reimplemented from FrameIstream.

Definition at line 184 of file MpegInputStream.C.

References ASSERT, and MovieDecoder::readAndDiscardFrame().

GenericFrame InputMPEGStream::readFrame ( ) [virtual]

Read the next frame from the mpeg stream.

The native representation of the GenericFrame will be a VideoFrame.

Implements FrameIstream.

Definition at line 162 of file MpegInputStream.C.

References ASSERT, and MovieDecoder::readVideoFrame().

Image< PixRGB< byte > > InputMPEGStream::readRGB ( ) [virtual]

Read the next frame from the mpeg stream.

returns an image of size (0,0) at the end of the stream