OpenShot Library | libopenshot
0.2.2
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28 #include "../include/DummyReader.h"
104 throw ReaderClosed(
"The ImageReader is closed. Call Open() before calling this method.",
"dummy");
112 image_frame->number = requested_frame;
117 throw InvalidFile(
"No frame could be created from this type of file.",
"dummy");
132 root[
"type"] =
"DummyReader";
144 bool success = reader.parse( value, root );
147 throw InvalidJSON(
"JSON could not be parsed (or is invalid)",
"");
157 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)",
"");
int sample_rate
The number of audio samples per second (44100 is a common sample rate)
float ToFloat()
Return this fraction as a float (i.e. 1/2 = 0.5)
virtual void SetJsonValue(Json::Value root)=0
Load Json::JsonValue into this object.
This namespace is the default namespace for all code in the openshot library.
This class represents a fraction.
std::shared_ptr< Frame > GetFrame(int64_t requested_frame)
Fraction Reciprocal()
Return the reciprocal as a Fraction.
float duration
Length of time (in seconds)
bool has_video
Determines if this file has a video stream.
Fraction display_ratio
The ratio of width to height of the video stream (i.e. 640x480 has a ratio of 4/3)
virtual Json::Value JsonValue()=0
Generate Json::JsonValue for this object.
int width
The width of the video (in pixesl)
ReaderInfo info
Information about the current media file.
string acodec
The name of the audio codec used to encode / decode the video stream.
int64_t video_length
The number of frames in the video stream.
int height
The height of the video (in pixels)
int num
Numerator for the fraction.
int den
Denominator for the fraction.
void Reduce()
Reduce this fraction (i.e. 640/480 = 4/3)
bool has_audio
Determines if this file has an audio stream.
Exception for invalid JSON.
int64_t file_size
Size of file (in bytes)
Fraction pixel_ratio
The pixel ratio of the video stream as a fraction (i.e. some pixels are not square)
CriticalSection getFrameCriticalSection
Section lock for multiple threads.
Exception for files that can not be found or opened.
string vcodec
The name of the video codec used to encode / decode the video stream.
DummyReader()
Blank constructor for DummyReader, with default settings.
Exception when a reader is closed, and a frame is requested.
Fraction fps
Frames per second, as a fraction (i.e. 24/1 = 24 fps)
Fraction video_timebase
The video timebase determines how long each frame stays on the screen.
void SetJson(string value)
Load JSON string into this object.
string Json()
Get and Set JSON methods.
Json::Value JsonValue()
Generate Json::JsonValue for this object.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
int channels
The number of audio channels used in the audio stream.
void Open()
Open File - which is called by the constructor automatically.