Video transcoding (PHP SDK V1)

Prerequisites

Before you begin, ensure that you have:

• IMM attached to your OSS bucket. See Attach IMM.

• The required OSS and IMM permissions. See Permissions.

• OSS PHP SDK 2.7.0 or later.

Usage notes

• The example below uses the public endpoint for the China (Hangzhou) region. To access OSS from other Alibaba Cloud services in the same region, use an internal endpoint instead. For supported regions and endpoints, see Regions and endpoints.

• The example reads access credentials from environment variables. To configure access credentials, see Configure access credentials (PHP SDK V1).

• The example creates an OssClient instance using an OSS domain name. To create an instance using a custom domain name or Security Token Service (STS), see Initialization (PHP SDK V1).

• For background on video transcoding concepts and supported formats, see Video transcoding.

Submit an asynchronous transcoding job

Call asyncProcessObject with a video/convert process string. The call returns immediately. OSS runs the transcoding job in the background and saves the output to the path you specify in the sys/saveas directive.

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}

use OSS\Credentials\EnvironmentVariableCredentialsProvider;
use OSS\OssClient;
use OSS\Core\OssException;

try {
    // Obtain access credentials from environment variables and store them in the provider. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured.
    $provider = new EnvironmentVariableCredentialsProvider();
    // Specify the Endpoint for the region where the bucket is located. For example, if the bucket is in the China (Hangzhou) region, set the Endpoint to https://oss-cn-hangzhou.aliyuncs.com.
    $endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
    // Specify the bucket name.
    $bucket = "examplebucket";
    $config = array(
        "provider" => $provider,
        "endpoint" => $endpoint,
        "bucket" => $bucket
        "signatureVersion" => OssClient::OSS_SIGNATURE_VERSION_V4,
        "region"=> "cn-hangzhou"
    );
    $ossClient = new OssClient($config);
    // Specify the name of the source video file.
    $source_object = 'src.mp4';
    // Specify the name of the transcoded video file.
    $target_object = 'dest.avi';
    // Transcode the source video file. The container of the output media file is AVI. The video stream is encoded in H.265, the resolution is 1920x1080, the frame rate is 30 fps, and the video bitrate is 2 Mbps. The audio is encoded in AAC with a bitrate of 100 Kbps. The caption stream is disabled.
    $process = 'video/convert,f_avi,vcodec_h265,s_1920x1080,vb_2000000,fps_30,acodec_aac,ab_100000,sn_1' .
        '|sys/saveas' .
        ',o_' . base64url_encode($target_object) .
        ',b_' . base64url_encode($bucket);
    $result = $ossClient->asyncProcessObject($bucket, $source_object, $process);
    var_dump($result);
} catch (OssException $e) {
    printf($e->getMessage() . "\n");
    return;
}

function base64url_encode($data)
{
    return rtrim(strtr(base64_encode($data), '+/', '-_'), '=');
}

What's next

• To learn about all supported transcoding parameters and output formats, see Video transcoding.

• To configure access credentials for the PHP SDK, see Configure access credentials (PHP SDK V1).