headless-screen-recorder
Version:
A Puppeteer plugin optimized for headless Chrome using HeadlessExperimental.beginFrame API for reliable video capture with proper color correction
314 lines • 24.8 kB
JavaScript
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (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 = 10;
this.screenCastFrames = [];
this.duration = '00:00:00:00';
this.frameGain = 0;
this.frameLoss = 0;
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 = (0, 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');
}
(0, 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) => {
const errorMessage = e.stderr || e.message;
console.error('FFmpeg error:', errorMessage);
this.handleWriteStreamError(errorMessage);
resolve(false);
})
.on('stderr', (e) => {
this.handleWriteStreamError(e);
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) => {
const errorMessage = e.stderr || e.message;
console.error('FFmpeg error:', errorMessage);
writableStream.emit('error', e);
resolve(false);
})
.on('stderr', (e) => {
writableStream.emit('error', { message: 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);
});
}
getOutputOption() {
var _a, _b;
const cpu = Math.max(1, os_1.default.cpus().length - 1);
const videoOutputOptions = (_a = this.options.videOutputOptions) !== null && _a !== void 0 ? _a : [];
const outputOptions = [];
outputOptions.push(`-crf ${(_b = this.options.videoCrf) !== null && _b !== void 0 ? _b : 23}`);
outputOptions.push(`-preset ${this.options.videoPreset || 'ultrafast'}`);
outputOptions.push(`-pix_fmt ${this.options.videoPixelFormat || 'yuv420p'}`);
outputOptions.push(`-minrate ${this.options.videoBitrate || 1000}`);
outputOptions.push(`-maxrate ${this.options.videoBitrate || 1000}`);
outputOptions.push('-framerate 1');
outputOptions.push(`-threads ${cpu}`);
outputOptions.push(`-loglevel error`);
videoOutputOptions.forEach((options) => {
outputOptions.push(options);
});
return outputOptions;
}
addVideoMetadata(outputStream) {
var _a;
const metadataOptions = (_a = this.options.metadata) !== null && _a !== void 0 ? _a : [];
for (const metadata of metadataOptions) {
outputStream.outputOptions('-metadata', metadata);
}
}
getDestinationStream() {
var _a;
const outputStream = (0, 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)
.videoFilters('scale=in_range=pc:in_color_matrix=bt601:out_range=tv:out_color_matrix=bt709')
.outputOptions(this.getOutputOption())
.outputOptions([
'-colorspace', 'bt709',
'-color_range', 'tv',
'-color_primaries', 'bt709',
'-color_trc', 'bt709'
])
.on('progress', (progressDetails) => {
this.duration = progressDetails.timemark;
});
this.addVideoMetadata(outputStream);
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, this.screenCastFrames[0].timestamp);
}
const insertionIndex = this.findSlot(frame.timestamp);
if (insertionIndex === this.screenCastFrames.length) {
this.screenCastFrames.push(frame);
}
else {
this.screenCastFrames.splice(insertionIndex, 0, frame);
}
}
trimFrame(fameList, chunckEndTime) {
return fameList.map((currentFrame, index) => {
const endTime = index !== fameList.length - 1
? fameList[index + 1].timestamp
: chunckEndTime;
const duration = endTime - currentFrame.timestamp;
return Object.assign(Object.assign({}, currentFrame), { duration });
});
}
processFrameBeforeWrite(frames, chunckEndTime) {
const processedFrames = this.trimFrame(frames, chunckEndTime);
processedFrames.forEach(({ blob, duration }) => {
this.write(blob, duration);
});
}
write(data, durationSeconds = 1) {
this.status = pageVideoStreamTypes_1.VIDEO_WRITE_STATUS.IN_PROGRESS;
const totalFrames = durationSeconds * this.options.fps;
const floored = Math.floor(totalFrames);
let numberOfFPS = Math.max(floored, 1);
if (floored === 0) {
this.frameGain += 1 - totalFrames;
}
else {
this.frameLoss += totalFrames - floored;
}
while (1 < this.frameLoss) {
this.frameLoss--;
numberOfFPS++;
}
while (1 < this.frameGain) {
this.frameGain--;
numberOfFPS--;
}
for (let i = 0; i < numberOfFPS; i++) {
this.videoMediatorStream.write(data);
}
}
drainFrames(stoppedTime) {
this.processFrameBeforeWrite(this.screenCastFrames, stoppedTime);
this.screenCastFrames = [];
}
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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