testcafe
Version:
Automated browser testing for the modern web development stack.
129 lines • 16.6 kB
JavaScript
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const debug_1 = __importDefault(require("debug"));
const child_process_1 = require("child_process");
const lodash_1 = require("lodash");
const pinkie_1 = __importDefault(require("pinkie"));
const async_event_emitter_1 = __importDefault(require("../utils/async-event-emitter"));
const delay_1 = __importDefault(require("../utils/delay"));
const DEBUG_LOGGER_PREFIX = 'testcafe:video-recorder:process:';
const DEFAULT_OPTIONS = {
// NOTE: don't ask confirmation for rewriting the output file
'y': true,
// NOTE: use the time when a frame is read from the source as its timestamp
// IMPORTANT: must be specified before configuring the source
'use_wallclock_as_timestamps': 1,
// NOTE: use stdin as a source
'i': 'pipe:0',
// NOTE: use the H.264 video codec
'c:v': 'libx264',
// NOTE: use the 'ultrafast' compression preset
'preset': 'ultrafast',
// NOTE: use the yuv420p pixel format (the most widely supported)
'pix_fmt': 'yuv420p',
// NOTE: scale input frames to make the frame height divisible by 2 (yuv420p's requirement)
'vf': 'scale=trunc(iw/2)*2:trunc(ih/2)*2',
// NOTE: set the frame rate to 30 in the output video (the most widely supported)
'r': 30
};
const FFMPEG_START_DELAY = 500;
class VideoRecorder extends async_event_emitter_1.default {
constructor(basePath, ffmpegPath, connection, customOptions) {
super();
this.debugLogger = debug_1.default(DEBUG_LOGGER_PREFIX + connection.id);
this.customOptions = customOptions;
this.videoPath = basePath;
this.connection = connection;
this.ffmpegPath = ffmpegPath;
this.ffmpegProcess = null;
this.ffmpegStdoutBuf = '';
this.ffmpegStderrBuf = '';
this.ffmpegClosingPromise = null;
this.closed = false;
this.optionsList = this._getOptionsList();
this.capturingPromise = null;
}
static _filterOption([key, value]) {
if (value === true)
return ['-' + key];
return ['-' + key, value];
}
_setupFFMPEGBuffers() {
this.ffmpegProcess.stdout.on('data', data => {
this.ffmpegStdoutBuf += String(data);
});
this.ffmpegProcess.stderr.on('data', data => {
this.ffmpegStderrBuf += String(data);
});
}
_getChildProcessPromise() {
return new pinkie_1.default((resolve, reject) => {
this.ffmpegProcess.on('exit', resolve);
this.ffmpegProcess.on('error', reject);
});
}
_getOptionsList() {
const optionsObject = Object.assign({}, DEFAULT_OPTIONS, this.customOptions);
const optionsList = lodash_1.flatten(Object.entries(optionsObject).map(VideoRecorder._filterOption));
optionsList.push(this.videoPath);
return optionsList;
}
async _addFrame(frameData) {
const writingFinished = this.ffmpegProcess.stdin.write(frameData);
if (!writingFinished)
await new pinkie_1.default(r => this.ffmpegProcess.stdin.once('drain', r));
}
async _capture() {
while (!this.closed) {
try {
const frame = await this.connection.provider.getVideoFrameData(this.connection.id);
if (frame) {
await this.emit('frame');
await this._addFrame(frame);
}
}
catch (error) {
this.debugLogger(error);
}
}
}
async init() {
this.ffmpegProcess = child_process_1.spawn(this.ffmpegPath, this.optionsList, { stdio: 'pipe' });
this._setupFFMPEGBuffers();
this.ffmpegClosingPromise = this
._getChildProcessPromise()
.then(code => {
this.closed = true;
if (code) {
this.debugLogger(code);
this.debugLogger(this.ffmpegStdoutBuf);
this.debugLogger(this.ffmpegStderrBuf);
}
})
.catch(error => {
this.closed = true;
this.debugLogger(error);
this.debugLogger(this.ffmpegStdoutBuf);
this.debugLogger(this.ffmpegStderrBuf);
});
await delay_1.default(FFMPEG_START_DELAY);
}
async startCapturing() {
this.capturingPromise = this._capture();
await this.once('frame');
}
async finishCapturing() {
if (this.closed)
return;
this.closed = true;
await this.capturingPromise;
this.ffmpegProcess.stdin.end();
await this.ffmpegClosingPromise;
}
}
exports.default = VideoRecorder;
module.exports = exports.default;
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debug from 'debug';\nimport { spawn } from 'child_process';\nimport { flatten } from 'lodash';\nimport Promise from 'pinkie';\nimport AsyncEmitter from '../utils/async-event-emitter';\nimport delay from '../utils/delay';\n\n\nconst DEBUG_LOGGER_PREFIX = 'testcafe:video-recorder:process:';\n\nconst DEFAULT_OPTIONS = {\n    // NOTE: don't ask confirmation for rewriting the output file\n    'y': true,\n\n    // NOTE: use the time when a frame is read from the source as its timestamp\n    // IMPORTANT: must be specified before configuring the source\n    'use_wallclock_as_timestamps': 1,\n\n    // NOTE: use stdin as a source\n    'i': 'pipe:0',\n\n    // NOTE: use the H.264 video codec\n    'c:v': 'libx264',\n\n    // NOTE: use the 'ultrafast' compression preset\n    'preset': 'ultrafast',\n\n    // NOTE: use the yuv420p pixel format (the most widely supported)\n    'pix_fmt': 'yuv420p',\n\n    // NOTE: scale input frames to make the frame height divisible by 2 (yuv420p's requirement)\n    'vf': 'scale=trunc(iw/2)*2:trunc(ih/2)*2',\n\n    // NOTE: set the frame rate to 30 in the output video (the most widely supported)\n    'r': 30\n};\n\nconst FFMPEG_START_DELAY = 500;\n\nexport default class VideoRecorder extends AsyncEmitter {\n    constructor (basePath, ffmpegPath, connection, customOptions) {\n        super();\n\n        this.debugLogger = debug(DEBUG_LOGGER_PREFIX + connection.id);\n\n        this.customOptions = customOptions;\n        this.videoPath     = basePath;\n        this.connection    = connection;\n        this.ffmpegPath    = ffmpegPath;\n        this.ffmpegProcess = null;\n\n        this.ffmpegStdoutBuf = '';\n        this.ffmpegStderrBuf = '';\n\n        this.ffmpegClosingPromise = null;\n\n        this.closed = false;\n\n        this.optionsList = this._getOptionsList();\n\n        this.capturingPromise = null;\n    }\n\n    static _filterOption ([key, value]) {\n        if (value === true)\n            return ['-' + key];\n\n        return ['-' + key, value];\n    }\n\n    _setupFFMPEGBuffers () {\n        this.ffmpegProcess.stdout.on('data', data => {\n            this.ffmpegStdoutBuf += String(data);\n        });\n\n        this.ffmpegProcess.stderr.on('data', data => {\n            this.ffmpegStderrBuf += String(data);\n        });\n    }\n\n    _getChildProcessPromise () {\n        return new Promise((resolve, reject) => {\n            this.ffmpegProcess.on('exit', resolve);\n            this.ffmpegProcess.on('error', reject);\n        });\n    }\n\n    _getOptionsList () {\n        const optionsObject = Object.assign({}, DEFAULT_OPTIONS, this.customOptions);\n\n        const optionsList = flatten(Object.entries(optionsObject).map(VideoRecorder._filterOption));\n\n        optionsList.push(this.videoPath);\n\n        return optionsList;\n    }\n\n    async _addFrame (frameData) {\n        const writingFinished = this.ffmpegProcess.stdin.write(frameData);\n\n        if (!writingFinished)\n            await new Promise(r => this.ffmpegProcess.stdin.once('drain', r));\n    }\n\n    async _capture () {\n        while (!this.closed) {\n            try {\n                const frame = await this.connection.provider.getVideoFrameData(this.connection.id);\n\n                if (frame) {\n                    await this.emit('frame');\n                    await this._addFrame(frame);\n                }\n            }\n            catch (error) {\n                this.debugLogger(error);\n            }\n        }\n    }\n\n    async init () {\n        this.ffmpegProcess = spawn(this.ffmpegPath, this.optionsList, { stdio: 'pipe' });\n\n        this._setupFFMPEGBuffers();\n\n        this.ffmpegClosingPromise = this\n            ._getChildProcessPromise()\n            .then(code => {\n                this.closed = true;\n\n                if (code) {\n                    this.debugLogger(code);\n                    this.debugLogger(this.ffmpegStdoutBuf);\n                    this.debugLogger(this.ffmpegStderrBuf);\n                }\n            })\n            .catch(error => {\n                this.closed = true;\n\n                this.debugLogger(error);\n                this.debugLogger(this.ffmpegStdoutBuf);\n                this.debugLogger(this.ffmpegStderrBuf);\n            });\n\n        await delay(FFMPEG_START_DELAY);\n    }\n\n    async startCapturing () {\n        this.capturingPromise = this._capture();\n\n        await this.once('frame');\n    }\n\n    async finishCapturing () {\n        if (this.closed)\n            return;\n\n        this.closed = true;\n\n        await this.capturingPromise;\n\n        this.ffmpegProcess.stdin.end();\n\n        await this.ffmpegClosingPromise;\n    }\n}\n"]}