云函数在音视频转码压缩场景应用案例

/************************************************************************* ***** ***** ***** 使用教程/readme ： ***** ***** https://cloud.tencent.com/document/product/583/47071 ***** ***** ***** **************************************************************************/ const COS = require('cos-nodejs-sdk-v5'); const fs = require('fs') const child_process = require('child_process') const util = require('util'); exports.main_handler = async (event, context) => { try { let downloadPath = '' let key = '' if (event.hasOwnProperty('body')) { downloadPath = event.body key = downloadPath.split('/').pop() } else if (event.hasOwnProperty('Records')) { key = event['Records'][0]['cos']['cosObject']['key'].split("/").pop() downloadPath = event['Records'][0]['cos']['cosObject']['url'] } else { return {"code": 410, "errorMsg": "event does not come from COS or APIGW"} } key = `new-${key}` const uploadPath = `/tmp/${key}` const region = process.env.region const targetBucket = process.env['target_bucket'] const targetPath = process.env['target_path'] || '' const secretId = process.env['TENCENTCLOUD_SECRETID'] const secretKey = process.env['TENCENTCLOUD_SECRETKEY'] const token = process.env['TENCENTCLOUD_SESSIONTOKEN'] const cos = new COS({ SecretId: secretId, SecretKey: secretKey, XCosSecurityToken: token }) child_process.execSync('cp ./ffmpeg /tmp/ffmpeg') child_process.execSync('chmod 755 /tmp/ffmpeg') child_process.execSync(`./ffmpeg -i ${downloadPath} -r 10 -b:a 32k ${uploadPath}`, { cwd: "/tmp" }) const putObjectAync = util.promisify(cos.putObject.bind(cos)) await putObjectAync({ Bucket: targetBucket, Region: region, Key: `${targetPath}/${key}`, Body: fs.readFileSync(uploadPath) }) fs.unlinkSync(uploadPath) return 'success' } catch (err) { console.log(err) return 'failed' } }