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Glossary
DokumentasiCloud Object StorageAPI DocumentationData Processing APIsMedia ProcessingSynchronous Transcoding

Synchronous Transcoding

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Terakhir diperbarui: 2026-01-12 18:52:28

Feature Overview

The GetSyncConvert API is used to obtain the synchronous transcoding results of media files, and is suitable for processing Live Photos and GIFs to enhance their compatibility.

Usage Instructions

This API uses synchronous mode. For asynchronous mode, please see Task Interface > Transcoding Task.

Limitations

Supported formats: Currently, this interface only supports processing files in GIF and Live Photos formats.
GIF animation size limit: The size of original image cannot exceed 40MB and total pixels not exceeding 300 million pixels.
Live Photos size limit: The size of the original image cannot exceed 20MB, and the total duration cannot exceed 4 seconds.

Request Sample

1. Using GET Request Method

GET /<ObjectKey>?ci-process=convert&format=mp4 HTTP/1.1
Host: <BucketName-APPID>.cos.<Region>.myqcloud.com
Date: <GMT Date>
Authorization: <Auth String>
Content-Length: <length>

2. Using URL Query Parameters

https://<BucketName-APPID>.cos.<Region>.myqcloud.com/for-test.gif?ci-process=convert&format=mp4&<Auth String>
Note:
Authorization: Auth String. For details, see Request Signature documentation.

Request Header

This API only uses common request headers. For details, see Common Request Headers documentation.

Request Parameters

The parameters are described as follows:
Parameter Name
Description
Type
Required
ObjectKey
Object filename, such as folder/sample.gif
String
Yes
ci-process
Operation type, the value is fixed as convert
String
Yes
width
Width of the transcoding result. Value range: [0,4096]. Default is 0.
Int
No
height
Height of the transcoding result. Value range: [0,4096]. Default is 0. When both width and height are 0, the video's aspect ratio is used. If one value is 0, the other value is automatically adapted according to the video's aspect ratio.
Int
No
format
Transcoding format, currently only supports mp4.
String
Yes

Request Body

This API has no request body.

Response

Response Header

This API only returns common response headers. For details, see Common Response Headers documentation.

Response Body

The response body is the transcoded file content.

Error Codes

This request returns common error responses and error codes. For more information, see Error Codes.

Practical Example

Request 1: Using GET Request Method

GET /for-test.gif?ci-process=convert&format=mp4 HTTP/1.1
Host: examplebucket-1250000000.cos.ap-beijing.myqcloud.com
Date: Fri, 10 Mar 2016 09:45:46 GMT
Authorization: q-sign-algorithm=sha1&q-ak=************************************-sign-time=1484213027;32557109027&q-key-time=1484213027;32557109027&q-header-list=host&q-url-param-list=acl&q-signature=**************************************
Content-Length: 0

Request 2: Using URL Query Parameters

https://examplebucket-1250000000.cos.ap-beijing.myqcloud.com/for-test.gif?ci-process=convert&format=mp4&time=1.5&q-sign-algorithm=sha1&q-ak=**********************************&q-sign-time=1650425932;1650433132&q-key-time=1650425932;1650433132&q-header-list=&q-url-param-list=&q-signature=*******************************


Response

HTTP/1.1 200 OK
Content-Type: video/mp4
Content-Length: 266005
Connection: keep-alive
Date: Fri, 10 Mar 2016 09:45:46 GMT
Server: tencent-ci
x-cos-request-id: NTg3NzRiMjVfYmRjMzVfMTViMl82ZGZmNw==



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