bool loadIndexedStackFFMpeg( QByteArray* buffer, Image4DSimple& img, int channel, int num_channels,
long width, long height )
{
try
{
FFMpegVideo video( buffer );
if ( ! video.isOpen )
return false;
int sx = video.getWidth();
int sy = video.getHeight();
int sz = video.getNumberOfFrames();
int sc = video.getNumberOfChannels();
// cout << "Number of frames = " << sz << endl;
if ( channel == 0 )
img.createBlankImage( width, height, sz, num_channels, 1 ); // 1 byte = 8 bits per value
Image4DProxy<Image4DSimple> proxy( &img );
int frameCount = 0;
for ( int z = 0; z < sz; ++z )
{
video.fetchFrame( z );
// int z = frameCount;
frameCount++;
for ( int y = 0; y < height; ++y )
{
for ( int x = 0; x < width; ++x )
{
proxy.put_at( x, y, z, channel,
video.getPixelIntensity( x, y, ( FFMpegVideo::Channel )0 )
);
}
}
}
cout << "Number of frames found = " << frameCount << endl;
return true;
}
catch ( ... ) {}
return false;
}
bool loadStackFFMpegAsGray( QUrl url, Image4DSimple& img )
{
try
{
FFMpegVideo video( url );
int sx = video.getWidth();
int sy = video.getHeight();
int sz = video.getNumberOfFrames();
int sc = video.getNumberOfChannels();
// cout << "Number of frames = " << sz << endl;
img.createBlankImage( sx, sy, sz, 1, 1 ); // 1 byte = 8 bits per value
Image4DProxy<Image4DSimple> proxy( &img );
int frameCount = 0;
for ( int z = 0; z < sz; ++z )
{
video.fetchFrame( z );
// int z = frameCount;
frameCount++;
for ( int y = 0; y < sy; ++y )
{
for ( int x = 0; x < sx; ++x )
{
// Use average of R,G,B as gray value
int val = 0;
for ( int c = 0; c < sc; ++c )
{
val += video.getPixelIntensity( x, y, ( FFMpegVideo::Channel )c );
}
val /= sc; // average of rgb
proxy.put_at( x, y, z, 0, val );
}
}
}
// cout << "Number of frames found = " << frameCount << endl;
return true;
}
catch ( ... ) {}
return false;
}
bool loadStackFFMpeg( QUrl url, Image4DSimple& img )
{
try
{
FFMpegVideo video( url );
if ( ! video.isOpen )
return false;
int sx = video.getWidth();
int sy = video.getHeight();
int sz = video.getNumberOfFrames();
int sc = video.getNumberOfChannels();
// cout << "Number of frames = " << sz << endl;
img.createBlankImage( sx, sy, sz, sc, 1 ); // 1 byte = 8 bits per value
Image4DProxy<Image4DSimple> proxy( &img );
int frameCount = 0;
for ( int z = 0; z < sz; ++z )
{
video.fetchFrame( z );
// int z = frameCount;
frameCount++;
for ( int c = 0; c < sc; ++c )
{
for ( int y = 0; y < sy; ++y )
{
for ( int x = 0; x < sx; ++x )
{
proxy.put_at( x, y, z, c,
video.getPixelIntensity( x, y, ( FFMpegVideo::Channel )c )
);
}
}
}
}
cout << "Number of frames found = " << frameCount << endl;
return true;
}
catch ( ... ) {}
return false;
}
