@axelboberg/puppeteer-screen-recorder
Version:
A puppeteer Plugin that uses the native chrome devtool protocol for capturing video frame by frame. Also supports an option to follow pages that are opened by the current page object
258 lines • 20.4 kB
JavaScript
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const events_1 = require("events");
const os_1 = __importDefault(require("os"));
const path_1 = require("path");
const stream_1 = require("stream");
const fluent_ffmpeg_1 = __importStar(require("fluent-ffmpeg"));
const pageVideoStreamTypes_1 = require("./pageVideoStreamTypes");
/**
* @ignore
*/
const SUPPORTED_FILE_FORMATS = [
pageVideoStreamTypes_1.SupportedFileFormats.MP4,
pageVideoStreamTypes_1.SupportedFileFormats.AVI,
pageVideoStreamTypes_1.SupportedFileFormats.MOV,
pageVideoStreamTypes_1.SupportedFileFormats.WEBM,
];
/**
* @ignore
*/
class PageVideoStreamWriter extends events_1.EventEmitter {
constructor(destinationSource, options) {
super();
this.screenLimit = 40;
this.screenCastFrames = [];
this.duration = '00:00:00:00';
this.status = pageVideoStreamTypes_1.VIDEO_WRITE_STATUS.NOT_STARTED;
this.videoMediatorStream = new stream_1.PassThrough();
if (options) {
this.options = options;
}
const isWritable = this.isWritableStream(destinationSource);
this.configureFFmPegPath();
if (isWritable) {
this.configureVideoWritableStream(destinationSource);
}
else {
this.configureVideoFile(destinationSource);
}
}
get videoFrameSize() {
const { width, height } = this.options.videoFrame;
return width !== null && height !== null ? `${width}x${height}` : '100%';
}
get autopad() {
const autopad = this.options.autopad;
return !autopad
? { activation: false }
: { activation: true, color: autopad.color };
}
getFfmpegPath() {
if (this.options.ffmpeg_Path) {
return this.options.ffmpeg_Path;
}
try {
// eslint-disable-next-line @typescript-eslint/no-var-requires
const ffmpeg = require('@ffmpeg-installer/ffmpeg');
if (ffmpeg.path) {
return ffmpeg.path;
}
return null;
}
catch (e) {
return null;
}
}
getDestinationPathExtension(destinationFile) {
const fileExtension = path_1.extname(destinationFile);
return fileExtension.includes('.')
? fileExtension.replace('.', '')
: fileExtension;
}
configureFFmPegPath() {
const ffmpegPath = this.getFfmpegPath();
if (!ffmpegPath) {
throw new Error('FFmpeg path is missing, \n Set the FFMPEG_PATH env variable');
}
fluent_ffmpeg_1.setFfmpegPath(ffmpegPath);
}
isWritableStream(destinationSource) {
if (destinationSource && typeof destinationSource !== 'string') {
if (!(destinationSource instanceof stream_1.Writable) ||
!('writable' in destinationSource) ||
!destinationSource.writable) {
throw new Error('Output should be a writable stream');
}
return true;
}
return false;
}
configureVideoFile(destinationPath) {
const fileExt = this.getDestinationPathExtension(destinationPath);
if (!SUPPORTED_FILE_FORMATS.includes(fileExt)) {
throw new Error('File format is not supported');
}
this.writerPromise = new Promise((resolve) => {
const outputStream = this.getDestinationStream();
outputStream
.on('error', (e) => {
this.handleWriteStreamError(e.message);
resolve(false);
})
.on('end', () => resolve(true))
.save(destinationPath);
if (fileExt == pageVideoStreamTypes_1.SupportedFileFormats.WEBM) {
outputStream
.videoCodec('libvpx')
.videoBitrate(this.options.videoBitrate || 1000, true)
.outputOptions('-flags', '+global_header', '-psnr');
}
});
}
configureVideoWritableStream(writableStream) {
this.writerPromise = new Promise((resolve) => {
const outputStream = this.getDestinationStream();
outputStream
.on('error', (e) => {
writableStream.emit('error', e);
resolve(false);
})
.on('end', () => {
writableStream.end();
resolve(true);
});
outputStream.toFormat('mp4');
outputStream.addOutputOptions('-movflags +frag_keyframe+separate_moof+omit_tfhd_offset+empty_moov');
outputStream.pipe(writableStream);
});
}
getDestinationStream() {
var _a, _b;
const cpu = Math.max(1, os_1.default.cpus().length - 1);
const outputStream = fluent_ffmpeg_1.default({
source: this.videoMediatorStream,
priority: 20,
})
.videoCodec(this.options.videoCodec || 'libx264')
.size(this.videoFrameSize)
.aspect(this.options.aspectRatio || '4:3')
.autopad(this.autopad.activation, (_a = this.autopad) === null || _a === void 0 ? void 0 : _a.color)
.inputFormat('image2pipe')
.inputFPS(this.options.fps)
.outputOptions(`-crf ${(_b = this.options.videoCrf) !== null && _b !== void 0 ? _b : 23}`)
.outputOptions(`-preset ${this.options.videoPreset || 'ultrafast'}`)
.outputOptions(`-pix_fmt ${this.options.videoPixelFormat || 'yuv420p'}`)
.outputOptions(`-minrate ${this.options.videoBitrate || 1000}`)
.outputOptions(`-maxrate ${this.options.videoBitrate || 1000}`)
.outputOptions(`-threads ${cpu}`)
.on('progress', (progressDetails) => {
this.duration = progressDetails.timemark;
});
if (this.options.recordDurationLimit) {
outputStream.duration(this.options.recordDurationLimit);
}
return outputStream;
}
handleWriteStreamError(errorMessage) {
this.emit('videoStreamWriterError', errorMessage);
if (this.status !== pageVideoStreamTypes_1.VIDEO_WRITE_STATUS.IN_PROGRESS &&
errorMessage.includes('pipe:0: End of file')) {
return;
}
return console.error(`Error unable to capture video stream: ${errorMessage}`);
}
findSlot(timestamp) {
if (this.screenCastFrames.length === 0) {
return 0;
}
let i;
let frame;
for (i = this.screenCastFrames.length - 1; i >= 0; i--) {
frame = this.screenCastFrames[i];
if (timestamp > frame.timestamp) {
break;
}
}
return i + 1;
}
insert(frame) {
// reduce the queue into half when it is full
if (this.screenCastFrames.length === this.screenLimit) {
const numberOfFramesToSplice = Math.floor(this.screenLimit / 2);
const framesToProcess = this.screenCastFrames.splice(0, numberOfFramesToSplice);
this.processFrameBeforeWrite(framesToProcess);
}
const insertionIndex = this.findSlot(frame.timestamp);
if (insertionIndex === this.screenCastFrames.length) {
this.screenCastFrames.push(frame);
}
else {
this.screenCastFrames.splice(insertionIndex, 0, frame);
}
}
trimFrame(fameList) {
if (!this.lastProcessedFrame) {
this.lastProcessedFrame = fameList[0];
}
return fameList.map((currentFrame) => {
const duration = currentFrame.timestamp - this.lastProcessedFrame.timestamp;
this.lastProcessedFrame = currentFrame;
return Object.assign(Object.assign({}, currentFrame), { duration });
});
}
processFrameBeforeWrite(frames) {
const processedFrames = this.trimFrame(frames);
processedFrames.forEach(({ blob, duration }) => {
this.write(blob, duration);
});
}
write(data, durationSeconds = 1) {
this.status = pageVideoStreamTypes_1.VIDEO_WRITE_STATUS.IN_PROGRESS;
const NUMBER_OF_FPS = Math.max(Math.floor(durationSeconds * this.options.fps), 1);
for (let i = 0; i < NUMBER_OF_FPS; i++) {
this.videoMediatorStream.write(data);
}
}
drainFrames(stoppedTime) {
this.processFrameBeforeWrite(this.screenCastFrames);
this.screenCastFrames = [];
if (!this.lastProcessedFrame)
return;
const durationSeconds = stoppedTime - this.lastProcessedFrame.timestamp;
this.write(this.lastProcessedFrame.blob, durationSeconds);
}
stop(stoppedTime = Date.now() / 1000) {
if (this.status === pageVideoStreamTypes_1.VIDEO_WRITE_STATUS.COMPLETED) {
return this.writerPromise;
}
this.drainFrames(stoppedTime);
this.videoMediatorStream.end();
this.status = pageVideoStreamTypes_1.VIDEO_WRITE_STATUS.COMPLETED;
return this.writerPromise;
}
}
exports.default = PageVideoStreamWriter;
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