/*!
Sets all the parameters needed to read the video or the image sequence.
Grab the first frame and stores it in the image \f$ I \f$.
\param I : The image where the frame is stored.
*/
void vpVideoReader::open(vpImage< vpRGBa > &I)
{
if (!initFileName)
{
vpERROR_TRACE("The generic filename has to be set");
throw (vpImageException(vpImageException::noFileNameError,"filename empty"));
}
if (formatType == FORMAT_PGM ||
formatType == FORMAT_PPM ||
formatType == FORMAT_JPEG ||
formatType == FORMAT_PNG)
{
imSequence = new vpDiskGrabber;
imSequence->setGenericName(fileName);
imSequence->setImageNumber((int)firstFrame);
}
#ifdef VISP_HAVE_FFMPEG
else if (formatType == FORMAT_AVI ||
formatType == FORMAT_MPEG ||
formatType == FORMAT_MOV ||
formatType == FORMAT_OGV)
{
ffmpeg = new vpFFMPEG;
if(!ffmpeg->openStream(fileName, vpFFMPEG::COLORED))
throw (vpException(vpException::ioError ,"Could not open the video"));
ffmpeg->initStream();
}
#else
else if (formatType == FORMAT_AVI ||
formatType == FORMAT_MPEG ||
formatType == FORMAT_MOV ||
formatType == FORMAT_OGV)
{
vpERROR_TRACE("To read video files the FFmpeg library has to be installed");
throw (vpException(vpException::fatalError ,"the FFmpeg library is required"));
}
#endif
else if (formatType == FORMAT_UNKNOWN)
{
vpERROR_TRACE("The format of the file does not correpsond to a readable format.");
throw (vpException(vpException::fatalError ,"The format of the file does not correpsond to a readable format."));
}
frameCount = firstFrame;
if(!getFrame(I,firstFrame))
{
vpERROR_TRACE("Could not read the first frame");
throw (vpException(vpException::ioError ,"Could not read the first frame"));
}
height = I.getHeight();
width = I.getWidth();
isOpen = true;
findLastFrameIndex();
}
/*!
Sets all the parameters needed to read the video or the image sequence.
Grab the first frame and stores it in the image \f$ I \f$.
\param I : The image where the frame is stored.
*/
void vpVideoReader::open(vpImage<unsigned char> &I)
{
if (!initFileName)
{
vpERROR_TRACE("The generic filename has to be set");
throw (vpImageException(vpImageException::noFileNameError,"filename empty"));
}
if (isImageExtensionSupported())
{
imSequence = new vpDiskGrabber;
imSequence->setGenericName(fileName);
if (firstFrameIndexIsSet)
imSequence->setImageNumber(firstFrame);
}
else if (isVideoExtensionSupported())
{
#ifdef VISP_HAVE_FFMPEG
ffmpeg = new vpFFMPEG;
if (!ffmpeg->openStream(fileName, vpFFMPEG::GRAY_SCALED))
throw (vpException(vpException::ioError ,"Could not open the video with ffmpeg"));
ffmpeg->initStream();
#elif VISP_HAVE_OPENCV_VERSION >= 0x020100
capture.open(fileName);
if(!capture.isOpened())
{
throw (vpException(vpException::ioError ,"Could not open the video with opencv"));
}
#else
//vpERROR_TRACE("To read video files ViSP should be build with ffmpeg or opencv 3rd party libraries.");
throw (vpException(vpException::fatalError ,"To read video files ViSP should be build with ffmpeg or opencv >= 2.1.0 3rd party libraries."));
#endif
}
else if (formatType == FORMAT_UNKNOWN)
{
//vpERROR_TRACE("The format of the file does not correspond to a readable format.");
throw (vpException(vpException::fatalError ,"The format of the file does not correspond to a readable format supported by ViSP."));
}
findFirstFrameIndex();
frameCount = firstFrame;
if(!getFrame(I,firstFrame))
{
//vpERROR_TRACE("Could not read the video first frame");
throw (vpException(vpException::ioError ,"Could not read the video first frame"));
}
height = I.getHeight();
width = I.getWidth();
isOpen = true;
findLastFrameIndex();
frameCount = firstFrame; // open() should not increase the frame counter
}
