VuoFfmpegUtility Namespace Reference

Description

Helper methods for working with ffmpeg.

Functions
static double	AvTimeToSecond (AVStream *stream, int64_t pts)
	Converts AVStream presentation timestamp to fractional seconds. More...
static int64_t	AvTimeToMicrosecond (AVStream *stream, int64_t pts)
	Converts AVStream presentation timestamp to integer microseconds. More...
static int64_t	SecondToAvTime (AVStream *stream, double second)
	Converts seconds to microseconds. More...
static int	FirstStreamIndexWithMediaType (AVFormatContext *context, AVMediaType type)
	Return the index of the first stream matching the media type. More...
static void	FlipImageBytesVertical (uint8_t *buffer, uint width, uint height)
	Flip an image vertically. More...
static bool	ConvertAVFrameToRGB (AVFrame *dst, AVPixelFormat dst_pix_fmt, AVFrame *src, AVPixelFormat pix_fmt, int width, int height)
	Convert an AVFrame from whatever format it was originally in to RGB. More...
static VuoImage	VuoImageWithAVFrame (AVCodecContext *videoCodecCtx, AVFrame *frame)
	Convert an AVFrame to a VuoImage. More...

Variables
const double	USEC_TO_SECOND = .000001
	Multiply by this to convert microsecond to seconds. More...
const double	SEC_TO_USEC = 1000000
	Multiply a second by this value to convert to microsecond. More...
bool	warnedAboutSlowFlip = false
	Whether we've already shown a warning about using the slow flipper code path. More...

Function Documentation

AvTimeToMicrosecond()

static int64_t VuoFfmpegUtility::AvTimeToMicrosecond ( AVStream *  stream, int64_t  pts  )

static

Converts AVStream presentation timestamp to integer microseconds.

Definition at line 56 of file VuoFfmpegUtility.h.

AvTimeToSecond()

static double VuoFfmpegUtility::AvTimeToSecond ( AVStream *  stream, int64_t  pts  )

static

Converts AVStream presentation timestamp to fractional seconds.

Definition at line 48 of file VuoFfmpegUtility.h.

ConvertAVFrameToRGB()

static bool VuoFfmpegUtility::ConvertAVFrameToRGB ( AVFrame *  dst, AVPixelFormat  dst_pix_fmt, AVFrame *  src, AVPixelFormat  pix_fmt, int  width, int  height  )

static

Convert an AVFrame from whatever format it was originally in to RGB.

Definition at line 107 of file VuoFfmpegUtility.h.

FirstStreamIndexWithMediaType()

static int VuoFfmpegUtility::FirstStreamIndexWithMediaType ( AVFormatContext *  context, AVMediaType  type  )

static

Return the index of the first stream matching the media type.

Definition at line 76 of file VuoFfmpegUtility.h.

FlipImageBytesVertical()

static void VuoFfmpegUtility::FlipImageBytesVertical ( uint8_t *  buffer, uint  width, uint  height  )

static

Flip an image vertically.

Definition at line 87 of file VuoFfmpegUtility.h.

SecondToAvTime()

static int64_t VuoFfmpegUtility::SecondToAvTime ( AVStream *  stream, double  second  )

static

Converts seconds to microseconds.

Definition at line 64 of file VuoFfmpegUtility.h.

VuoImageWithAVFrame()

static VuoImage VuoFfmpegUtility::VuoImageWithAVFrame ( AVCodecContext *  videoCodecCtx, AVFrame *  frame  )

static

Convert an AVFrame to a VuoImage.

Definition at line 166 of file VuoFfmpegUtility.h.

Variable Documentation

SEC_TO_USEC

const double VuoFfmpegUtility::SEC_TO_USEC = 1000000

Multiply a second by this value to convert to microsecond.

Definition at line 45 of file VuoFfmpegUtility.h.

USEC_TO_SECOND

const double VuoFfmpegUtility::USEC_TO_SECOND = .000001

Multiply by this to convert microsecond to seconds.

Definition at line 42 of file VuoFfmpegUtility.h.

warnedAboutSlowFlip

bool VuoFfmpegUtility::warnedAboutSlowFlip = false

Whether we've already shown a warning about using the slow flipper code path.

Definition at line 102 of file VuoFfmpegUtility.h.