QtlMovieFFmpeg Namespace Reference

Namespace for ffmpeg utilities. More...

Functions
void	addBoundedSizeOptions (QStringList &ffmpegArguments, QString &videoFilters, int widthIn, int heightIn, float darIn, int maxWidthOut, int maxHeightOut, float parOut, int &widthOut, int &heightOut)
	Build a video resize FFmpeg options list to bind the video within a maximum size. More...
void	addResizeVideoFilter (QString &videoFilters, int widthIn, int heightIn, float darIn, int widthOut, int heightOut, float darOut)
	Compute an FFmpeg video filter for a target size and aspect ratio. More...
void	addRotateOptions (const QtlMovieSettings *settings, const QtlMediaStreamInfoPtr &videoStream, QStringList &ffmpegArguments, QString &videoFilters, int &width, int &height, float &dar)
	Build a video rotation FFmpeg options list . More...
QStringList	dvdAudioOptions (const QtlMovieSettings *settings, const QtlMediaStreamInfoPtr &audioStream)
	Build an audio conversion FFmpeg options list for DVD transcoding. More...
QString	escapedFilterArgument (const QString &argument)
	Format the argument of an ffmpeg filter using proper escaping. More...
QStringList	inputArguments (const QtlMovieSettings *settings, const QtlMovieInputFile *file=0)
	Build FFmpeg command line arguments for an input file. More...
QStringList	outputArguments (const QtlMovieSettings *settings, const QString &fileName, const QString &fileFormat=QString())
	Build FFmpeg command line arguments for output file. More...
QStringList	probeArguments (const QtlMovieSettings *settings, int probeTimeDivisor=0)
	Build FFmpeg command line arguments for the initial probe size and duration. More...
QStringList	videoFilterOptions (const QString &videoFilters)
	Build FFmpeg command line arguments to insert a video filter string. More...

Detailed Description

Namespace for ffmpeg utilities.

Function Documentation

probeArguments()

QStringList QtlMovieFFmpeg::probeArguments	(	const QtlMovieSettings *	settings,
		int	probeTimeDivisor = 0
	)

Build FFmpeg command line arguments for the initial probe size and duration.

Parameters

[in]	settings	Application settings.
[in]	probeTimeDivisor	If positive, this value is used to reduce the probe time duration. The actual probe time is the value from settings, divided by probeTimeDivisor.

Returns

FFmpeg command line arguments.

inputArguments()

QStringList QtlMovieFFmpeg::inputArguments	(	const QtlMovieSettings *	settings,
		const QtlMovieInputFile *	file = 0
	)

Build FFmpeg command line arguments for an input file.

Parameters

[in]	settings	Application settings.
[in]	file	Input file description. If omitted, do not specify an input file name.

Returns

FFmpeg command line arguments.

outputArguments()

QStringList QtlMovieFFmpeg::outputArguments	(	const QtlMovieSettings *	settings,
		const QString &	fileName,
		const QString &	fileFormat = QString()
	)

Build FFmpeg command line arguments for output file.

Parameters

[in]	settings	Application settings.
[in]	fileName	Output file name.
[in]	fileFormat	If non empty, specifies the FFmpeg format of the output file.

Returns

FFmpeg command line arguments.

dvdAudioOptions()

QStringList QtlMovieFFmpeg::dvdAudioOptions	(	const QtlMovieSettings *	settings,
		const QtlMediaStreamInfoPtr &	audioStream
	)

Build an audio conversion FFmpeg options list for DVD transcoding.

Parameters

[in]	settings	Application settings.
[in]	audioStream	Audio stream description. Can be null.

Returns

FFmpeg options, possibly empty.

escapedFilterArgument()

QString QtlMovieFFmpeg::escapedFilterArgument

(

const QString &

argument

)

Format the argument of an ffmpeg filter using proper escaping.

Parameters

[in]

argument

The argument plain text.

Returns

The corresponding string to add in the filter description.

videoFilterOptions()

QStringList QtlMovieFFmpeg::videoFilterOptions

(

const QString &

videoFilters

)

Build FFmpeg command line arguments to insert a video filter string.

Parameters

[in]

videoFilters

A video filter string.

Returns

FFmpeg command line arguments. Can be empty if no video filter is specified.

addResizeVideoFilter()

void QtlMovieFFmpeg::addResizeVideoFilter	(	QString &	videoFilters,
		int	widthIn,
		int	heightIn,
		float	darIn,
		int	widthOut,
		int	heightOut,
		float	darOut
	)

Compute an FFmpeg video filter for a target size and aspect ratio.

Parameters

[in,out]	videoFilters	A video filter string which is updated.
[in]	widthIn	Input video width in pixels.
[in]	heightIn	Input video height in pixels.
[in]	darIn	Input display aspect ratio.
[in]	widthOut	Target video width in pixels.
[in]	heightOut	Target video height in pixels.
[in]	darOut	Target display aspect ratio.

addBoundedSizeOptions()

void QtlMovieFFmpeg::addBoundedSizeOptions	(	QStringList &	ffmpegArguments,
		QString &	videoFilters,
		int	widthIn,
		int	heightIn,
		float	darIn,
		int	maxWidthOut,
		int	maxHeightOut,
		float	parOut,
		int &	widthOut,
		int &	heightOut
	)

Build a video resize FFmpeg options list to bind the video within a maximum size.

Always resize if the input pixel aspect ratio does not match the output one.

Parameters

[in,out]	ffmpegArguments	A list of FFmpeg arguments which is updated.
[in,out]	videoFilters	A video filter string which is updated.
[in]	widthIn	Input video width in pixels.
[in]	heightIn	Input video height in pixels.
[in]	darIn	Input display aspect ratio.
[in]	maxWidthOut	Maximum target video width in pixels.
[in]	maxHeightOut	Maximum target video height in pixels.
[in]	parOut	Target pixel aspect ratio.
[out]	widthOut	Returned target video width in pixels.
[out]	heightOut	Returned target video height in pixels.

addRotateOptions()

void QtlMovieFFmpeg::addRotateOptions	(	const QtlMovieSettings *	settings,
		const QtlMediaStreamInfoPtr &	videoStream,
		QStringList &	ffmpegArguments,
		QString &	videoFilters,
		int &	width,
		int &	height,
		float &	dar
	)

Build a video rotation FFmpeg options list .

Parameters

[in]	settings	Application settings.
[in]	videoStream	Video stream description.
[in,out]	ffmpegArguments	A list of FFmpeg arguments which is updated.
[in,out]	videoFilters	A video filter string which is updated.
[out]	width	New video width in pixels after rotation.
[out]	height	New video height in pixels after rotation.
[out]	dar	New display aspect ratio after rotation.