DescribeCasterComponents - ApsaraVideo Live - Alibaba Cloud Documentation Center

Usage notes

You can call the AddCasterComponent operation to add a component to a production studio and call the DescribeCasterComponents operation to query the components of a production studio.

QPS limit

You can call this operation up to 15 times per second per account. Requests that exceed this limit are dropped and you will experience service interruptions. We recommend that you take note of this limit when you call this operation. For more information, see QPS limits.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter	Type	Required	Example	Description
Action	String	Yes	DescribeCasterComponents	The operation that you want to perform. Set the value to DescribeCasterComponents.
CasterId	String	Yes	LIVEPRODUCER_POST-cn-0pp1czt****	The ID of the production studio. If the production studio was created by calling the CreateCaster operation, check the value of the response parameter CasterId to obtain the ID. If the production studio was created by using the ApsaraVideo Live console, obtain the ID on the Production Studio Management page. To go to the page, log on to the ApsaraVideo Live console and click Production Studios in the left-side navigation pane. Note You can find the ID of the production studio in the Instance ID/Name column.
ComponentId	String	No	21926b36-7dd2-4fde-ae25-51b5bc8e****	The component ID. If the component was added by calling the AddCasterComponent operation, check the value of the response parameter ComponentId to obtain the ID.

Response parameters

Parameter	Type	Example	Description
Components	Array of Component		The components.
Component
CaptionLayerContent	Object		The information about the subtitle component.
BorderColor	String	0x000000	The color of the text border. Valid values: 0x000000 to 0xffffff. If the value of this parameter is "", this parameter does not take effect.
BorderWidthNormalized	Float	0	The normalized value of the border width of the text. The value of this parameter equals the border width divided by the font size. The maximum border width of the text is 16, even if the border width calculated based on this parameter is greater than 16. If the value of this parameter is 0, the component does not have a specified normalized border width.
Color	String	0x000000	The color of the text. Valid values: 0x000000 to 0xffffff.
FontName	String	KaiTi	The font name of the text. The font name is specified by the system. Valid values: KaiTi AlibabaPuHuiTi-Regular AlibabaPuHuiTi-Bold NAlibabaPuHuiTi-Light NotoSansHans-Regular NotoSansHans-Bold NotoSansHans-Light
LineSpaceNormalized	Float	0	The line spacing, which indicates the interval between every two lines.
LocationId	String	RV01	The location ID of the component. If the value of the ComponentType parameter is caption, the LocationId parameter indicates the channel ID of the video source that is referenced by the component.
PtsOffset	Integer	0	The offset between the presentation timestamps (PTSs) of the subtitle and the audio. Valid values: -10000 to 10000. Default value: 0.
ShowSourceLan	Boolean	false	Indicates whether the source language of the subtitle is displayed. Valid values: true: The source language is displayed. false: The source language is not displayed.
SizeNormalized	Float	0.1	The normalized value of the font size of the subtitle. The value of this field equals the font size divided by the output height. The maximum font size of the subtitle is 1,024, even if the font size calculated based on this field is greater than 1,024. If the value of this parameter -1, this parameter does not take effect.
SourceLan	String	cn	The source audio language in the video source. Valid values: en: English. cn: Chinese. es: Spanish. ru: Russian.
TargetLan	String	cn	The destination language of the audio in the video source. Valid values: en: English. cn: Chinese. es: Spanish. ru: Russian.
WordCountPerLine	Integer	15	The maximum number of words displayed in each line.
WordSpaceNormalized	Float	0	The word spacing, which indicates the interval between every two words. If no upper limit on the number of words per line is specified, the value of this parameter is 0.
WordsCount	Integer	35	The number of words displayed on the component. The value of this field can be specified based on the font size. Valid values: 10 to 50.
ComponentId	String	72d2ec7a-4cd7-4a01-974b-7cd53947****	The component ID.
ComponentLayer	Object		The information about the component layer, such as the size and layout.
HeightNormalized	Float	0.5	The normalized value of heights for the elements in the layer. The widths of the elements are scaled based on this parameter. If the value of this parameter is 0, the elements in the component layer are not scaled.
PositionNormalizeds	Array of Float	0.3	The normalized values of the coordinates of the component layer, in the format of `[x,y]`. The default value is `[0,0]`. Note Use the normalized values of the coordinates when you set the field in a request.
PositionRefer	String	topLeft	The reference coordinates of the component layer. Valid values: topLeft: the upper-left corner topRight: the upper-right corner bottomLeft: the lower-left corner bottomRight: the lower-right corner
Transparency	Integer	200	The transparency of the component layer. Valid values: 0 to 255. A value of 0 indicates that the component layer is completely transparent. A value of 255 indicates that the component layer is completely opaque.
WidthNormalized	Float	0.5	The normalized value for the widths of elements in the layer. The heights of elements are proportionally scaled based on this parameter. If the value of this parameter is 0, the elements in the component layer are not scaled. Note This field does not take effect when the HeightNormalized field is also set. If you set the WidthNormalized field and then the HeightNormalized field, the component layer is configured based on the HeightNormalized field.
ComponentName	String	component_name	The name of the component. By default, the name is the ID of the component.
ComponentType	String	text	The component type. Valid values: text: a text component. image: an image component. caption: a caption component.
Effect	String	animateV	The effect for the component. Valid values: none: none. animateH: horizontal scrolling. animateV: vertical scrolling.
ImageLayerContent	Object		The information about the image component. This parameter is returned only for image components.
MaterialId	String	6cf724c6ebfd4a59b5b3cec6f10d****	The ID of the material from the media library.
LocationId	String	RC01	The location ID of the component. Each location ID can be assigned to only one component and must be in the RC[Number] format. The values of this parameter are in ascending order, such as RC01 to RC12.
TextLayerContent	Object		The information about the text component. This parameter is returned only for text components.
BorderColor	String	0x000000	The color of the text border. Valid values: 0x000000 to 0xffffff. If "" is returned, no border color applies.
BorderWidthNormalized	Float	0	The normalized value of the border width of the text. The value of this field equals the border width divided by the font size. The maximum border width of the text is 16, even if the border width calculated based on this parameter is greater than 16.
Color	String	0xff0000	The color of the text. Valid values: 0x000000 to 0xffffff.
FontName	String	KaiTi	The font name of the text. The font name is specified by the system. Valid values: KaiTi AlibabaPuHuiTi-Regular AlibabaPuHuiTi-Bold NAlibabaPuHuiTi-Light NotoSansHans-Regular NotoSansHans-Bold NotoSansHans-Light
SizeNormalized	Float	16	The normalized value of the font size of the text. The value of this field equals the font size divided by the output height. The maximum font size of the text is 1,024, even if the font size calculated based on this field is greater than 1,024. If the value of this parameter -1, this parameter does not take effect.
Text	String	hello world	The content of the text.
RequestId	String	3be7ade8-d907-483c-b24a-0dad4595beaf	The request ID.
Total	Integer	3	The total number of entries.

Examples

Sample requests

http(s)://live.aliyuncs.com/?Action=DescribeCasterComponents
&CasterId=LIVEPRODUCER_POST-cn-0pp1czt****
&<Common request parameters>

Sample success responses

XML format

HTTP/1.1 200 OK
Content-Type:application/xml

<DescribeCasterComponentsResponse>
    <Components>
        <CaptionLayerContent>
            <BorderColor>0x000000</BorderColor>
            <BorderWidthNormalized>0</BorderWidthNormalized>
            <Color>0x000000</Color>
            <FontName>KaiTi</FontName>
            <LineSpaceNormalized>0</LineSpaceNormalized>
            <LocationId>RV01</LocationId>
            <PtsOffset>0</PtsOffset>
            <ShowSourceLan>false</ShowSourceLan>
            <SizeNormalized>0.1</SizeNormalized>
            <SourceLan>cn</SourceLan>
            <TargetLan>cn</TargetLan>
            <WordCountPerLine>15</WordCountPerLine>
            <WordSpaceNormalized>0</WordSpaceNormalized>
            <WordsCount>35</WordsCount>
        </CaptionLayerContent>
        <ComponentId>72d2ec7a-4cd7-4a01-974b-7cd53947****</ComponentId>
        <ComponentLayer>
            <HeightNormalized>0.5</HeightNormalized>
            <PositionNormalizeds>0.3</PositionNormalizeds>
            <PositionRefer>topLeft</PositionRefer>
            <Transparency>200</Transparency>
            <WidthNormalized>0.5</WidthNormalized>
        </ComponentLayer>
        <ComponentName>component_name</ComponentName>
        <ComponentType>text</ComponentType>
        <Effect>animateV</Effect>
        <ImageLayerContent>
            <MaterialId>6cf724c6ebfd4a59b5b3cec6f10d****</MaterialId>
        </ImageLayerContent>
        <LocationId>RC01</LocationId>
        <TextLayerContent>
            <BorderColor>0x000000</BorderColor>
            <BorderWidthNormalized>0</BorderWidthNormalized>
            <Color>0xff0000</Color>
            <FontName>KaiTi</FontName>
            <SizeNormalized>16</SizeNormalized>
            <Text>hello world</Text>
        </TextLayerContent>
    </Components>
    <RequestId>3be7ade8-d907-483c-b24a-0dad4595beaf</RequestId>
    <Total>3</Total>
</DescribeCasterComponentsResponse>

JSON format

HTTP/1.1 200 OK
Content-Type:application/json

{
  "Components" : [ {
    "CaptionLayerContent" : {
      "BorderColor" : "0x000000",
      "BorderWidthNormalized" : 0,
      "Color" : "0x000000",
      "FontName" : "KaiTi",
      "LineSpaceNormalized" : 0,
      "LocationId" : "RV01",
      "PtsOffset" : 0,
      "ShowSourceLan" : false,
      "SizeNormalized" : 0.1,
      "SourceLan" : "cn",
      "TargetLan" : "cn",
      "WordCountPerLine" : 15,
      "WordSpaceNormalized" : 0,
      "WordsCount" : 35
    },
    "ComponentId" : "72d2ec7a-4cd7-4a01-974b-7cd53947****",
    "ComponentLayer" : {
      "HeightNormalized" : 0.5,
      "PositionNormalizeds" : [ 0.3 ],
      "PositionRefer" : "topLeft",
      "Transparency" : 200,
      "WidthNormalized" : 0.5
    },
    "ComponentName" : "component_name",
    "ComponentType" : "text",
    "Effect" : "animateV",
    "ImageLayerContent" : {
      "MaterialId" : "6cf724c6ebfd4a59b5b3cec6f10d****"
    },
    "LocationId" : "RC01",
    "TextLayerContent" : {
      "BorderColor" : "0x000000",
      "BorderWidthNormalized" : 0,
      "Color" : "0xff0000",
      "FontName" : "KaiTi",
      "SizeNormalized" : 16,
      "Text" : "hello world"
    }
  } ],
  "RequestId" : "3be7ade8-d907-483c-b24a-0dad4595beaf",
  "Total" : 3
}

Error codes

For a list of error codes, see Service error codes.