Protocol for media asset search - ApsaraVideo VOD - Alibaba Cloud Documentation Center

This topic describes the syntax of the protocol that is used for media asset search in ApsaraVideo VOD. You must use the protocol together with the SearchMedia operation. The protocol is a real-time search protocol that integrates the retrieval, filtering, sorting, and pagination features. You can use the protocol to query information about media assets such as videos, audio, and images in ApsaraVideo VOD.

Syntax

Media asset fields are classified into the following categories based on the syntax rules that are defined in the protocol for media asset search: fields used as returned fields, fields used for exact match, fields used for fuzzy match, fields used for a multi-value query, fields used for a range query, and fields used as sort fields. For more information about all media asset fields supported by ApsaraVideo VOD and the applicable syntax rules, see the Media asset information section of this topic.

Important

When you call the SearchMedia operation to query media asset information, you must perform URL encoding on the query statement. In addition, you must use single-byte punctuation marks such as equal signs (=), double quotation marks ("), single quotation marks ('), and parentheses () in the query statement. For more information about special characters that are defined in the protocol for media asset search, see the Special characters section of this topic.

The following table describes the syntax that is defined in the protocol for media asset search and provides search examples.

Category	Description	Syntax	Example
Fields used as returned fields	Specifies the fields that you want to return in the search results. By default, only the ID, creation time, and type of each media asset are returned.	field1,field2	Returned field
Fields used for exact match	Queries information about the media assets that match the exact value of a specified field.	field = value	Exact match
Fields used for fuzzy match	Queries information about the media assets whose value of a specified field contains the specified characters or strings.	field in ('value1','value2') or field = 'value'	Fuzzy match
Fields used for a multi-value query	Queries information about the media assets that match one of the values of a specified field.	field in ('value1','value2')	Multi-value query
Fields used for a range query	Queries information about the media assets whose value of a specified field falls in a specified open or closed interval.	field = (value1,value2)	Range query
Fields used as sort fields	Specifies the fields that you want to use for sorting the search results and specify the sorting method. The descending order and ascending order are supported. Multiple sort fields are displayed from left to right based on their priorities in descending order.	SortBy = field:Desc	Sort field

Special characters

Character	Description	Syntax
and	Connects two filter conditions to query information about the media assets that meet both filter conditions.	field1 = 'value' and field2 = 'value'
or	Connects two filter conditions to query information about the media assets that meet one of the filter conditions. If you use the OR operator in the query statement, you must enclose the filter conditions in a pair of parentheses ().	(field1 = 'value1' or field2='value2')
( )	The parentheses that are used to enclose a specified open or closed interval for a range query.	field = ('value1','value2')
( )	The parentheses that are used to enclose multiple filter conditions in the OR relationship.	(field1 = 'value1' or field2 = 'value2')
' '	The single quotation marks that are used to enclose field values of the STRING type.	field = 'value'
,	The comma that is used for a multi-value query. You can separate multiple field values with commas (,).	field in ('value1','value2')
( ) [ ]	Specifies an open or closed interval for a range query. You can specify whether to include or exclude the left endpoint and right endpoint of the interval.	field = ['value1','value2']
in	Specifies multiple values for a field in a multi-value query to query information about the media assets that match one of the values of the specified field.	field in ('value1','value2')

Media asset information

ApsaraVideo VOD allows you to query information about specified video, audio, and image files, and auxiliary media assets. The following tables describe the syntax rules that are applicable to various media asset fields. √ in the following tables indicates supported items and × indicates items that are not supported.

Important

You can specify a maximum of three values for multi-value queries.
Each string for fuzzy queries can contain a maximum of 60 characters.
If you cannot obtain a precise hit from fuzzy queries by using the Title field together with another field, check your statement for format errors. Example of a correct statement: (Title = 'Test' and Description = 'Description').

Video: specifies information about a video

Field	Type	Description	Used as a returned field	Used for exact match	Used for fuzzy match	Used for a multi-value query	Used for a range query	Used as a sort field
VideoId	String	The ID of the video.	√	√	×	√	×	×
AppId	String	The ID of the application.	√	×	×	√	×	×
CateId	Long	The ID of the category to which the video belongs.	√	√	×	×	×	×
CateName	String	The name of the category to which the video belongs.	√	×	×	×	×	×
StorageLocation	String	The region where the video is stored.	√	√	×	√	×	×
Title	String	The title of the video.	√	×	√	×	×	×
Tags	String	The tag of the video.	√	×	√	√	×	×
Description	String	The description of the video.	√	×	√	×	×	×
Status	String	The status of the video.	√	×	×	√	×	×
MediaSource	String	The source of the video.	√	×	×	√	×	×
PreprocessStatus	String	The preprocessing status of the video.	√	×	×	√	×	×
Size	Long	The size of the video.	√	×	×	×	√	×
Duration	Float	The duration of the video.	√	×	×	×	√	×
CreationTime	String	The time when the video is created.	√	×	×	×	√	√
ModificationTime	String	The time when the video is last updated.	√	×	×	×	√	√
CoverURL	String	The URL of the thumbnail image.	√	×	×	×	×	×
Snapshots	String[]	The list of automatic snapshots.	√	×	×	×	×	×
SpriteSnapshots	String[]	The list of image sprites.	√	×	×	×	×	×
DownloadSwitch	String	Specifies whether offline download is enabled.	√	×	×	×	×	×
TranscodeMode	String	The transcoding mode of the video.	√	×	×	×	×	×

Audio: specifies information about an audio file

Field	Type	Description	Used as a returned field	Used for exact match	Used for fuzzy match	Used for a multi-value query	Used for a range query	Used as a sort field
AudioId	String	The ID of the audio.	√	√	×	×	×	×
AppId	String	The ID of the application.	√	×	×	√	×	×
CateId	Long	The ID of the category to which the audio belongs.	√	√	×	×	×	×
CateName	String	The name of the category to which the audio belongs.	√	×	×	×	×	×
StorageLocation	String	The region where the audio is stored.	√	×	×	√	×	×
Title	String	The title of the audio.	√	×	√	×	×	×
Tags	String	The tag of the audio.	√	×	√	√	×	×
Description	String	The description of the audio.	√	×	√	×	×	×
Status	String	The status of the audio.	√	×	×	√	×	×
MediaSource	String	The source of the audio.	√	×	×	√	×	×
PreprocessStatus	String	The preprocessing status of the audio.	√	×	×	√	×	×
Size	Long	The size of the audio.	√	×	×	×	√	×
Duration	Float	The duration of the audio.	√	×	×	×	√	×
CreationTime	String	The time when the audio is created.	√	×	×	×	√	√
ModificationTime	String	The time when the audio is last updated.	√	×	×	×	√	√
CoverURL	String	The URL of the thumbnail image.	√	×	×	×	×	×
Snapshots	String[]	The list of automatic snapshots.	√	×	×	×	×	×
SpriteSnapshots	String[]	The list of image sprites.	√	×	×	×	×	×
DownloadSwitch	String	Specifies whether offline download is enabled.	√	×	×	×	×	×
TranscodeMode	String	The transcoding mode of the audio.	√	×	×	×	×	×

Image: specifies information about an image

Field	Type	Description	Used as a returned field	Used for exact match	Used for fuzzy match	Used for a multi-value query	Used for a range query	Used as a sort field
ImageId	String	The ID of the image.	√	√	×	×	×	×
AppId	String	The ID of the application.	√	×	×	√	×	×
CateId	Long	The ID of the category to which the image belongs.	√	√	×	×	×	×
CateName	String	The name of the category to which the image belongs.	√	×	×	×	×	×
StorageLocation	String	The region where the image is stored.	√	√	×	√	×	×
FileName	String	The file name of the image.	√	×	√	×	×	×
Title	String	The title of the image.	√	×	√	×	×	×
Tags	String	The tag of the image.	√	×	√	√	×	×
Description	String	The description of the image.	√	×	√	×	×	×
Status	String	The status of the image.	√	×	×	√	×	×
CreationTime	String	The time when the image is created.	√	×	×	×	√	√
ModificationTime	String	The time when the image is last updated.	√	×	×	×	√	√
URL	String	The URL of the image.	√	×	×	×	×	×

AttachedMedia: specifies information about an auxiliary media asset

Field	Type	Description	Used as a returned field	Used for exact match	Used for fuzzy match	Used for a multi-value query	Used for a range query	Used as a sort field
MediaId	String	The ID of the auxiliary media asset.	√	√	×	×	×	×
AppIdString	String	The ID of the application.	√	×	×	√	×	×
CateId	Long	The ID of the category to which the auxiliary media asset belongs.	×	√	×	×	×	×
Categories	Category[]	The list of category IDs.	√	×	×	×	×	×
StorageLocation	String	The region where the auxiliary media asset is stored.	√	√	×	√	×	×
FileName	String	The file name of the auxiliary media asset.	√	×	√	×	×	×
Title	String	The title of the auxiliary media asset.	√	×	√	×	×	×
Tags	String	The tag of the auxiliary media asset.	√	×	√	√	×	×
Description	String	The description of the auxiliary media asset.	√	×	√	×	×	×
Status	String	The status of the auxiliary media asset.	√	×	×	√	×	×
CreationTime	String	The time when the auxiliary media asset is created.	√	×	×	×	√	√
ModificationTime	String	The time when the auxiliary media asset is last updated.	√	×	×	×	√	√
URL	String	The URL of the auxiliary media asset.	√	×	×	×	×	×
BusinessType	String	The type of the business.	√	√	×	×	×	×

AttachedMedia: specifies information about an auxiliary media asset

PreprocessStatus: specifies the preprocessing status of a media asset

Only preprocessed media assets can be used for live streaming in a production studio.

Value	Description	Remarks
UnPreprocess	The media asset is not preprocessed.	The initial state.
Preprocessing	The media asset is being preprocessed.	None.
PreprocessSucceed	The preprocessing is complete.	None.
PreprocessFailed	The preprocessing failed.	None.

DownloadSwitch: specifies whether offline download is enabled for a media asset

A media asset can be downloaded in offline mode only when offline download is enabled.

Value	Description	Remarks
on	Offline download is enabled.	The initial state. The media asset can be downloaded in offline mode.
off	Offline download is disabled.	If offline download is disabled, the media asset cannot be downloaded in offline mode.

MediaSource: specifies the source of a media asset

Value	Description	Remarks
general	The media asset is uploaded to ApsaraVideo VOD by using the console.	The simple upload mode.
short_video	The media asset is uploaded to ApsaraVideo VOD by using the short video SDK.	For more information, see Overview.
editing	The media asset is uploaded to ApsaraVideo VOD by creating a video production task.	For more information, see ProduceEditingProjectVideo.
live	The media asset is uploaded to ApsaraVideo VOD as a live recording.	None.

TranscodeMode: specifies the transcoding mode

After a media asset is uploaded to ApsaraVideo VOD, it can be played only after it is processed. Processing methods vary based on transcoding modes.

Value	Description	Remarks
FastTranscode	The regular transcoding.	The default mode. The media asset is immediately transcoded after it is uploaded to ApsaraVideo VOD. The media asset can be played only after it is transcoded.
NoTranscode	The media asset is distributed without transcoding.	Media assets in the following formats can be immediately played without transcoding after they are uploaded to ApsaraVideo VOD: MP4, FLV, M3U8, MP3, and WEBM.
AsyncTranscode	After a media asset is uploaded, it is immediately distributed and transcoded.	After a media asset is uploaded to ApsaraVideo VOD, it can be immediately played and asynchronously transcoded.