42ImageWriter::ImageWriter(std::string
path) :
43 path(
path), cache_size(8), write_video_count(0), image_quality(75), number_of_loops(1),
44 combine_frames(true), is_open(false)
53 int quality,
int loops,
bool combine)
60 image_quality = quality;
61 number_of_loops = loops;
62 combine_frames = combine;
86 ZmqLogger::Instance()->
AppendDebugMethod(
"ImageWriter::SetVideoOptions (" + format +
")",
"width", width,
"height", height,
"size.num", size.
num,
"size.den", size.
den,
"fps.num", fps.
num,
"fps.den", fps.
den);
100 throw WriterClosed(
"The ImageWriter is closed. Call Open() before calling this method.", path);
104 std::shared_ptr<Magick::Image> frame_image = frame->GetMagickImage();
106 frame_image->backgroundColor(Magick::Color(
"none"));
108 frame_image->quality(image_quality);
110 frame_image->animationIterations(number_of_loops);
114 int new_height =
info.
height * frame->GetPixelRatio().Reciprocal().ToDouble();
117 Magick::Geometry new_size(new_width, new_height);
118 new_size.aspect(
true);
119 frame_image->resize(new_size);
123 frames.push_back(*frame_image.get());
135 for (int64_t number = start; number <= length; number++)
138 std::shared_ptr<Frame> f = reader->
GetFrame(number);
149 Magick::writeImages(frames.begin(), frames.end(), path, combine_frames);
155 write_video_count = 0;
Header file for all Exception classes.
Header file for ImageWriter class.
#define MAGICK_IMAGE_ALPHA(im, a)
This class represents a fraction.
int num
Numerator for the fraction.
float ToFloat()
Return this fraction as a float (i.e. 1/2 = 0.5)
void Reduce()
Reduce this fraction (i.e. 640/480 = 4/3)
int den
Denominator for the fraction.
void WriteFrame(ReaderBase *reader, int64_t start, int64_t length)
Write a block of frames from a reader.
void Close()
Close the writer and encode/output final image to the disk. This is a requirement of ImageMagick,...
void SetVideoOptions(std::string format, Fraction fps, int width, int height, int quality, int loops, bool combine)
Set the video export options.
void WriteFrame(std::shared_ptr< Frame > frame)
Add a frame to the stack waiting to be encoded.
This abstract class is the base class, used by all readers in libopenshot.
virtual std::shared_ptr< openshot::Frame > GetFrame(int64_t number)=0
WriterInfo info
Information about the current media file.
Exception when too many seek attempts happen.
void AppendDebugMethod(std::string method_name, std::string arg1_name="", float arg1_value=-1.0, std::string arg2_name="", float arg2_value=-1.0, std::string arg3_name="", float arg3_value=-1.0, std::string arg4_name="", float arg4_value=-1.0, std::string arg5_name="", float arg5_value=-1.0, std::string arg6_name="", float arg6_value=-1.0)
Append debug information.
static ZmqLogger * Instance()
Create or get an instance of this logger singleton (invoke the class with this method)
This namespace is the default namespace for all code in the openshot library.
int height
The height of the video (in pixels)
int video_bit_rate
The bit rate of the video stream (in bytes)
bool has_audio
Determines if this file has an audio stream.
std::string vcodec
The name of the video codec used to encode / decode the video stream.
bool has_video
Determines if this file has a video stream.
openshot::Fraction fps
Frames per second, as a fraction (i.e. 24/1 = 24 fps)
openshot::Fraction video_timebase
The video timebase determines how long each frame stays on the screen.
openshot::Fraction display_ratio
The ratio of width to height of the video stream (i.e. 640x480 has a ratio of 4/3)
int width
The width of the video (in pixels)
openshot::Fraction pixel_ratio
The pixel ratio of the video stream as a fraction (i.e. some pixels are not square)