42 init_effect_details();
51 init_effect_details();
55 void ChromaKey::init_effect_details()
62 info.
name =
"Chroma Key (Greenscreen)";
63 info.
description =
"Replaces the color (or chroma) of the frame with transparency (i.e. keys out the color).";
70 std::shared_ptr<openshot::Frame>
ChromaKey::GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number)
73 int threshold = fuzz.
GetInt(frame_number);
74 long mask_R = color.
red.
GetInt(frame_number);
79 std::shared_ptr<QImage> image = frame->GetImage();
80 unsigned char *pixels = (
unsigned char *) image->bits();
83 for (
int pixel = 0, byte_index=0; pixel < image->width() * image->height(); pixel++, byte_index+=4)
87 float A = float(pixels[byte_index + 3]);
88 unsigned char R = (pixels[byte_index] / A) * 255.0;
89 unsigned char G = (pixels[byte_index + 1] / A) * 255.0;
90 unsigned char B = (pixels[byte_index + 2] / A) * 255.0;
95 if (distance <= threshold) {
99 pixels[byte_index] = 0;
100 pixels[byte_index + 1] = 0;
101 pixels[byte_index + 2] = 0;
102 pixels[byte_index + 3] = 0;
140 catch (
const std::exception& e)
143 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)");
154 if (!root[
"color"].isNull())
156 if (!root[
"fuzz"].isNull())
165 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
166 root[
"position"] =
add_property_json(
"Position",
Position(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
168 root[
"start"] =
add_property_json(
"Start",
Start(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
169 root[
"end"] =
add_property_json(
"End",
End(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
170 root[
"duration"] =
add_property_json(
"Duration",
Duration(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
true, requested_frame);
173 root[
"color"] =
add_property_json(
"Key Color", 0.0,
"color",
"", &color.
red, 0, 255,
false, requested_frame);
177 root[
"fuzz"] =
add_property_json(
"Fuzz", fuzz.
GetValue(requested_frame),
"float",
"", &fuzz, 0, 125,
false, requested_frame);
183 return root.toStyledString();
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
std::shared_ptr< openshot::Frame > GetFrame(int64_t frame_number) override
This method is required for all derived classes of ClipBase, and returns a new openshot::Frame object...
std::string Id() const
Get the Id of this clip object.
void SetJsonValue(const Json::Value root) override
Load Json::Value into this object.
float Start() const
Get start position (in seconds) of clip (trim start of video)
virtual void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
const Json::Value stringToJson(const std::string value)
virtual Json::Value JsonValue() const
Generate Json::Value for this object.
int GetInt(int64_t index) const
Get the rounded INT value at a specific index.
openshot::Keyframe blue
Curve representing the red value (0 - 255)
bool has_audio
Determines if this effect manipulates the audio of a frame.
static long GetDistance(long R1, long G1, long B1, long R2, long G2, long B2)
Get the distance between 2 RGB pairs. (0=identical colors, 10=very close colors, 760=very different c...
Header file for all Exception classes.
openshot::Keyframe green
Curve representing the green value (0 - 255)
ChromaKey()
Blank constructor, useful when using Json to load the effect properties.
std::string class_name
The class name of the effect.
std::string name
The name of the effect.
Json::Value JsonValue() const override
Generate Json::Value for this object.
This class represents a color (used on the timeline and clips)
float Duration() const
Get the length of this clip (in seconds)
std::string PropertiesJSON(int64_t requested_frame) const override
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
This namespace is the default namespace for all code in the openshot library.
Json::Value JsonValue() const
Generate Json::Value for this object.
std::string description
The description of this effect and what it does.
void SetJson(const std::string value) override
Load JSON string into this object.
bool has_video
Determines if this effect manipulates the image of a frame.
Exception for invalid JSON.
double GetValue(int64_t index) const
Get the value at a specific index.
std::string Json() const override
Generate JSON string of this object.
Header file for ChromaKey class.
openshot::Keyframe red
Curve representing the red value (0 - 255)
std::string parent_effect_id
Id of the parent effect (if there is one)
float Position() const
Get position on timeline (in seconds)
float End() const
Get end position (in seconds) of clip (trim end of video)
A Keyframe is a collection of Point instances, which is used to vary a number or property over time...
Json::Value add_property_json(std::string name, float value, std::string type, std::string memo, const Keyframe *keyframe, float min_value, float max_value, bool readonly, int64_t requested_frame) const
Generate JSON for a property.
int Layer() const
Get layer of clip on timeline (lower number is covered by higher numbers)
EffectInfoStruct info
Information about the current effect.
Json::Value JsonValue() const
Generate Json::Value for this object.