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CrafyVideoJS.js
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class CrafyVideoJSWebGLImageManager {
constructor(targetWidth, targetHeight) {
this.targetWidth = targetWidth;
this.targetHeight = targetHeight;
this.initWebGL();
}
initWebGL() {
// Crear canvas offscreen para WebGL
this.canvas = new OffscreenCanvas(this.targetWidth, this.targetHeight);
this.gl = this.canvas.getContext('webgl2');
if (!this.gl) {
throw new Error('WebGL2 no disponible');
}
// Shaders para el redimensionamiento
const vertexShaderSource = `#version 300 es
in vec4 a_position;
in vec2 a_texCoord;
out vec2 v_texCoord;
void main() {
gl_Position = a_position;
v_texCoord = vec2(a_texCoord.x, 1.0 - a_texCoord.y);
}
`;
const fragmentShaderSource = `#version 300 es
precision highp float;
uniform sampler2D u_texture;
in vec2 v_texCoord;
out vec4 outColor;
void main() {
outColor = texture(u_texture, v_texCoord);
}
`;
// Compilar shaders
const vertexShader = this.compileShader(vertexShaderSource, this.gl.VERTEX_SHADER);
const fragmentShader = this.compileShader(fragmentShaderSource, this.gl.FRAGMENT_SHADER);
// Crear y linkear programa
this.program = this.gl.createProgram();
this.gl.attachShader(this.program, vertexShader);
this.gl.attachShader(this.program, fragmentShader);
this.gl.linkProgram(this.program);
if (!this.gl.getProgramParameter(this.program, this.gl.LINK_STATUS)) {
throw new Error('Error al linkear programa WebGL');
}
// Configurar geometría
const positions = new Float32Array([
-1, -1,
1, -1,
-1, 1,
1, 1,
]);
const texCoords = new Float32Array([
0, 0,
1, 0,
0, 1,
1, 1,
]);
// Crear y configurar buffers
this.positionBuffer = this.gl.createBuffer();
this.gl.bindBuffer(this.gl.ARRAY_BUFFER, this.positionBuffer);
this.gl.bufferData(this.gl.ARRAY_BUFFER, positions, this.gl.STATIC_DRAW);
this.texCoordBuffer = this.gl.createBuffer();
this.gl.bindBuffer(this.gl.ARRAY_BUFFER, this.texCoordBuffer);
this.gl.bufferData(this.gl.ARRAY_BUFFER, texCoords, this.gl.STATIC_DRAW);
// Configurar atributos
this.positionLocation = this.gl.getAttribLocation(this.program, 'a_position');
this.texCoordLocation = this.gl.getAttribLocation(this.program, 'a_texCoord');
// Crear y configurar textura
this.texture = this.gl.createTexture();
this.gl.bindTexture(this.gl.TEXTURE_2D, this.texture);
this.gl.texParameteri(this.gl.TEXTURE_2D, this.gl.TEXTURE_WRAP_S, this.gl.CLAMP_TO_EDGE);
this.gl.texParameteri(this.gl.TEXTURE_2D, this.gl.TEXTURE_WRAP_T, this.gl.CLAMP_TO_EDGE);
this.gl.texParameteri(this.gl.TEXTURE_2D, this.gl.TEXTURE_MIN_FILTER, this.gl.LINEAR);
this.gl.texParameteri(this.gl.TEXTURE_2D, this.gl.TEXTURE_MAG_FILTER, this.gl.LINEAR);
}
compileShader(source, type) {
const shader = this.gl.createShader(type);
this.gl.shaderSource(shader, source);
this.gl.compileShader(shader);
if (!this.gl.getShaderParameter(shader, this.gl.COMPILE_STATUS)) {
throw new Error('Error al compilar shader: ' + this.gl.getShaderInfoLog(shader));
}
return shader;
}
async resize(videoFrame) {
const gl = this.gl;
// Usar el programa WebGL
gl.useProgram(this.program);
// Configurar viewport
gl.viewport(0, 0, this.targetWidth, this.targetHeight);
// Configurar atributos
gl.bindBuffer(gl.ARRAY_BUFFER, this.positionBuffer);
gl.enableVertexAttribArray(this.positionLocation);
gl.vertexAttribPointer(this.positionLocation, 2, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, this.texCoordBuffer);
gl.enableVertexAttribArray(this.texCoordLocation);
gl.vertexAttribPointer(this.texCoordLocation, 2, gl.FLOAT, false, 0, 0);
// Actualizar textura con el nuevo frame
gl.bindTexture(gl.TEXTURE_2D, this.texture);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, videoFrame);
// Dibujar
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
await this.waitForSync(gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0));
// gl.flush();
// gl.finish();
// // Leer los píxeles redimensionados
// const pixels = new Uint8Array(this.targetWidth * this.targetHeight * 4);
// gl.readPixels(0, 0, this.targetWidth, this.targetHeight, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
// // Crear un nuevo VideoFrame con las dimensiones objetivo
// const imageData = new ImageData(new Uint8ClampedArray(pixels), this.targetWidth, this.targetHeight);
// const bitmap = await createImageBitmap(imageData);
const bitmap = await createImageBitmap(this.canvas);
const finalVideoFrame = new VideoFrame(bitmap, {
timestamp: videoFrame.timestamp,
duration: videoFrame.duration
});
bitmap.close();
return finalVideoFrame;
}
waitForSync(sync) {
return new Promise((resolve) => {
const checkSync = () => {
const status = this.gl.clientWaitSync(
sync,
this.gl.SYNC_FLUSH_COMMANDS_BIT,
0 // no timeout
);
if (status === this.gl.TIMEOUT_EXPIRED) {
// Todavía no está listo, intentar de nuevo en el próximo frame
requestAnimationFrame(checkSync);
} else if (status === this.gl.WAIT_FAILED) {
// Error en la sincronización, resolver de todos modos
resolve();
} else {
// Listo (ALREADY_SIGNALED o CONDITION_SATISFIED)
resolve();
}
};
checkSync();
});
}
cleanup() {
const gl = this.gl;
gl.deleteProgram(this.program);
gl.deleteBuffer(this.positionBuffer);
gl.deleteBuffer(this.texCoordBuffer);
gl.deleteTexture(this.texture);
}
}
class CrafyVideoJS {
constructor(logs = false) {
this.logs = logs;
this.resetThisVariables();
}
resetThisVariables() {
this.VIDEO_TIMESCALE = 90000;
this.AUDIO_TIMESCALE = 48000;
this.AUDIO_SAMPLERATE = 48000;
this.AUDIO_SAMPLESIZE = 16;
this.AUDIO_CHANNELCOUNT = 2;
this.isFirstVideoSample = true;
this.chunkOffset = 40;
this.itsOnError = false;
}
onProgress(progressData) { }
onError(error) { }
onResult(result) { }
in_onError(error) {
this.itsOnError = true;
this.onError(error);
}
/**
* Process a video.
* @param {ArrayBuffer} file - Input video file as ArrayBuffer.
* @param {int} start_timestamp - (optional) Cut the video from this timestamp in microseconds.
* @param {int} end_timestamp - (optional) Trim the video up to this timestamp in microseconds.
* @param {int} max_video_bitrate - (optional) Max output video bitrate.
* @param {int} max_video_resolution - (optional) Max output video width or height.
* @param {int} queue_max_size - (optional) Max number of video chunks in queue at the same time.
* @param {string} redimension_system - (optional) "webgl" | "bitmap"
* @param {string} encoder_latencyMode - (optional) "quality" | "realtime"
* @param {int} video_info_read_max_time - (optional) Maximum time in milliseconds to read the input video information.
* @param {string} redimension_resizeQuality - (optional) "pixelated" | "low" | "medium" | "high"
* @param {int} max_input_video_size - (optional) Max input video size in bytes.
* @param {int} max_input_video_samplesCount - (optional) Max input video samples count.
* @param {function} preprocess_video_info_function - (optional) Async function that receives the mp4box information from the input video and returns an object whose keys allow changing the rest of these parameters.
* @param {string} output_video_codec - (optional) "avc1" | (experimental, not working: "hvc1")
* @param {int} audio_queue_max_size - (optional) Max number of audio chunks in queue at the same time.
*/
async processVideo({
file,
start_timestamp = false,
end_timestamp = false,
max_video_bitrate = false,
max_video_resolution = false,
queue_max_size = 10,
redimension_system = 'bitmap',
encoder_latencyMode = 'quality',
video_info_read_max_time = 60000,
redimension_resizeQuality = 'low',
max_input_video_size = false,
max_input_video_samplesCount = false,
preprocess_video_info_function = false,
output_video_codec = "avc1",
audio_queue_max_size = 20
} = {}) {
this.resetThisVariables();
var savedThis = this;
if (preprocess_video_info_function === false) {
preprocess_video_info_function = savedThis.helper_preprocess_video_info_function;
}
if (end_timestamp !== false && start_timestamp === false) {
start_timestamp = 0;
}
if (start_timestamp !== false) {
if (start_timestamp < 0) {
start_timestamp = 0;
}
}
if (start_timestamp !== false && end_timestamp !== false) {
if (end_timestamp <= start_timestamp) {
throw new Error("end_timestamp must be greater than start_timestamp.");
}
}
const startNow = performance.now();
if (savedThis.logs) console.log("Started!");
let videoDecoder;
let videoEncoder;
let audioDecoder;
let audioEncoder;
let videoTrack = null;
let audioTrack = null;
let decodedVideoFrameIndex = 0;
let encodedVideoFrameIndex = 0;
let videoFrameCount = 0;
let audioFrameCount = 0;
let decodedAudioFrameIndex = 0;
let encodedAudioFrameIndex = 0;
let nextVideoKeyFrameTimestamp = 0;
let nextAudioKeyFrameTimestamp = 0;
let sampleVideoDurations = [];
let sampleAudioDurations = [];
let videoTrak = null;
let audioTrak = null;
let outputAudioCodec;
let inputVideoBitrate;
let inputAudioBitrate;
let inputVideoSamplesNumber;
let videoResizer;
let encodedFinishedPromise;
let encodedFinishedPromise_resolved = false;
let encodedFinishedPromise_resolver;
encodedFinishedPromise = new Promise((resolve) => {
encodedFinishedPromise_resolver = resolve;
});
let encodedAudioFinishedPromise;
let encodedAudioFinishedPromise_resolved = false;
let encodedAudioFinishedPromise_resolver;
encodedAudioFinishedPromise = new Promise((resolve) => {
encodedAudioFinishedPromise_resolver = resolve;
});
let audioSendedToEncodeCount = 0;
let mp4boxInputFileReadyPromise_resolver;
let mp4boxInputFileReadyPromise = new Promise((resolve) => {
mp4boxInputFileReadyPromise_resolver = resolve;
});
const mp4boxOutputFile = savedThis.createMP4File();
savedThis.glob_mp4boxOutputFile = mp4boxOutputFile;
const mp4boxInputFile = MP4Box.createFile();
mp4boxInputFile.onError = (error) => { if (savedThis.logs) console.error(error) };
mp4boxInputFile.onReady = async (info) => {
if (savedThis.logs) console.log('mp4boxInputFile info', info);
videoTrack = info.videoTracks[0];
audioTrack = info.audioTracks[0];
if (audioTrack && audioTrack.codec == "mp4a") {
audioTrack.codec = "mp4a.40.2";
}
if (videoTrack) {
if (max_input_video_samplesCount !== false) {
if (videoTrack.nb_samples > max_input_video_samplesCount) {
throw new Error("exceded_max_input_video_samplesCount");
}
}
}
preprocess_video_info_function(info).then((preprocess_video_info_response) => {
if (Object.entries(preprocess_video_info_response).length > 0) {
for (const [variableName, variableNewValue] of Object.entries(preprocess_video_info_response)) {
eval(variableName + " = variableNewValue;");
}
}
if (audioTrack) {
outputAudioCodec = audioTrack.codec;
}
savedThis.getSupportedAudioBitrates(audioTrack, outputAudioCodec).then((supportedAudioBitrates) => {
if (savedThis.logs) console.log('queue_max_size', queue_max_size, 'audio_queue_max_size', audio_queue_max_size);
if (videoTrack) {
savedThis.VIDEO_TIMESCALE = videoTrack.timescale;
inputVideoBitrate = videoTrack.bitrate;
inputVideoSamplesNumber = videoTrack.nb_samples;
var videoResizeDimensions = false;
var finalMaxVideoResolution = max_video_resolution;
if (max_video_resolution !== false) {
if (typeof max_video_resolution != 'number') {
if (max_video_resolution['type'] == 'by_near_samplesCount') {
finalMaxVideoResolution = Math.round(max_video_resolution['data'][Object.keys(max_video_resolution['data'])[savedThis.findClosestIndex(Object.keys(max_video_resolution['data']), inputVideoSamplesNumber)]]);
} else if (max_video_resolution['type'] == 'by_max_samplesCount') {
const sortedEntries = Object.entries(max_video_resolution['data']).sort(([keyA], [keyB]) => keyA.localeCompare(keyB));
const sortedObj = Object.fromEntries(sortedEntries);
var newMaxVideoResolution = false;
for (const [samplesCountKey, maxResolutionItem] of Object.entries(sortedObj)) {
if (samplesCountKey != 0) {
if (inputVideoSamplesNumber <= samplesCountKey) {
newMaxVideoResolution = maxResolutionItem;
break;
}
}
}
if (newMaxVideoResolution !== false) {
finalMaxVideoResolution = newMaxVideoResolution;
} else {
if (max_video_resolution['data'][0] !== undefined) {
finalMaxVideoResolution = max_video_resolution['data'][0];
}
}
}
}
}
if (savedThis.logs) console.log('finalMaxVideoResolution', finalMaxVideoResolution);
if (finalMaxVideoResolution !== false) {
videoResizeDimensions = savedThis.getDimensionsForResize(videoTrack.track_width, videoTrack.track_height, finalMaxVideoResolution, true, true);
if (videoResizeDimensions !== false) {
if (redimension_system == 'webgl') {
videoResizer = new CrafyVideoJSWebGLImageManager(videoResizeDimensions.width, videoResizeDimensions.height);
}
if (savedThis.logs) console.log('Video redimension', videoResizeDimensions);
}
}
var videoDecoder_isFirst = true;
videoDecoder = new VideoDecoder({
async output(inputFrame) {
// const bitmap = await createImageBitmap(inputFrame);
// const outputFrame = new VideoFrame(bitmap, {
// timestamp: inputFrame.timestamp,
// });
// const keyFrameEveryHowManySeconds = 2;
// let keyFrame = false;
// if (inputFrame.timestamp >= nextVideoKeyFrameTimestamp) {
// keyFrame = true;
// nextVideoKeyFrameTimestamp = inputFrame.timestamp + keyFrameEveryHowManySeconds * 1e6;
// }
// videoEncoder.encode(outputFrame, { keyFrame });
// inputFrame.close();
// outputFrame.close();
// Debug:
// videoDecoder_isFirst
// if (true) {
// const canvas = document.createElement("canvas");
// const ctx = canvas.getContext("2d");
// canvas.width = inputFrame.codedWidth;
// canvas.height = inputFrame.codedHeight;
// ctx.drawImage(inputFrame, 0, 0);
// document.body.appendChild(canvas);
// }
var allowedFrame = true;
if (start_timestamp !== false) {
if (inputFrame.timestamp < start_timestamp) {
allowedFrame = false;
}
}
var resizedFrame;
if (allowedFrame) {
if (videoResizeDimensions !== false) {
if (redimension_system == 'webgl') {
resizedFrame = await videoResizer.resize(inputFrame);
} else if (redimension_system == 'bitmap') {
const bitmap = await createImageBitmap(inputFrame, {
resizeWidth: videoResizeDimensions.width,
resizeHeight: videoResizeDimensions.height,
resizeQuality: redimension_resizeQuality
});
resizedFrame = new VideoFrame(bitmap, {
timestamp: inputFrame.timestamp,
duration: inputFrame.duration
});
bitmap.close();
}
if (videoDecoder_isFirst) {
videoDecoder_isFirst = false;
videoEncoder.encode(resizedFrame, { keyFrame: true, timestamp: inputFrame.timestamp });
} else {
try {
videoEncoder.encode(resizedFrame, { timestamp: inputFrame.timestamp });
} catch (error) {
if (savedThis.logs) console.error(error);
}
}
} else {
const bitmap = await createImageBitmap(inputFrame, {
resizeWidth: inputFrame.codedWidth,
resizeHeight: inputFrame.codedHeight,
resizeQuality: redimension_resizeQuality
});
resizedFrame = new VideoFrame(bitmap, {
timestamp: inputFrame.timestamp,
duration: inputFrame.duration
});
bitmap.close();
if (videoDecoder_isFirst) {
videoDecoder_isFirst = false;
videoEncoder.encode(resizedFrame, { keyFrame: true, timestamp: inputFrame.timestamp });
} else {
videoEncoder.encode(resizedFrame, { timestamp: inputFrame.timestamp });
}
}
} else {
videoFrameCount--;
}
try {
if (resizedFrame !== undefined) {
resizedFrame.close();
}
inputFrame.close();
} catch (error) { }
decodedVideoFrameIndex++;
displayProgress();
},
error(error) {
if (savedThis.logs) console.error(error);
}
});
let description;
const trak = mp4boxInputFile.getTrackById(videoTrack.id);
for (const entry of trak.mdia.minf.stbl.stsd.entries) {
if (entry.avcC || entry.hvcC) {
const stream = new DataStream(undefined, 0, DataStream.BIG_ENDIAN);
if (entry.avcC) {
entry.avcC.write(stream);
} else {
entry.hvcC.write(stream);
}
description = new Uint8Array(stream.buffer, 8); // Remove the box header.
break;
}
}
videoDecoder.configure({
codec: videoTrack.codec,
codedWidth: videoTrack.track_width,
codedHeight: videoTrack.track_height,
hardwareAcceleration: 'prefer-hardware',
description,
});
var outputVideoDimensions = {
'width': videoTrack.track_width,
'height': videoTrack.track_height
};
if (videoResizeDimensions !== false) {
outputVideoDimensions.width = videoResizeDimensions.width;
outputVideoDimensions.height = videoResizeDimensions.height;
}
let videoTotalResolution = outputVideoDimensions.width * outputVideoDimensions.height;
let newVideoBitrate = Math.round(inputVideoBitrate);
if (max_video_bitrate !== false) {
if (typeof max_video_bitrate == 'number') {
if (newVideoBitrate > max_video_bitrate) {
newVideoBitrate = Math.round(max_video_bitrate);
}
} else {
if (max_video_bitrate['type'] == 'percentage_of_original') {
newVideoBitrate = Math.round(newVideoBitrate / 100 * max_video_bitrate['percentage']);
} else if (max_video_bitrate['type'] == 'max_by_resolution') {
let localMaxVideoBitrate = max_video_bitrate['data'][Object.keys(max_video_bitrate['data'])[savedThis.findClosestIndex(Object.keys(max_video_bitrate['data']), videoTotalResolution)]];
if (newVideoBitrate > localMaxVideoBitrate) {
newVideoBitrate = Math.round(localMaxVideoBitrate);
}
} else if (max_video_bitrate['type'] == 'percentage_of_original_by_resolution') {
newVideoBitrate = Math.round(newVideoBitrate / 100 * max_video_bitrate['data'][Object.keys(max_video_bitrate['data'])[savedThis.findClosestIndex(Object.keys(max_video_bitrate['data']), videoTotalResolution)]]);
} else if (max_video_bitrate['type'] == 'percentage_and_max_of_original_by_resolution') {
let indexData = max_video_bitrate['data'][Object.keys(max_video_bitrate['data'])[savedThis.findClosestIndex(Object.keys(max_video_bitrate['data']), videoTotalResolution)]];
newVideoBitrate = Math.round(newVideoBitrate / 100 * indexData['percentage']);
if (newVideoBitrate > indexData['max']) {
newVideoBitrate = Math.round(indexData['max']);
}
}
}
}
if (savedThis.logs) console.log('newVideoBitrate', newVideoBitrate);
var outputVideoCodec;
if (output_video_codec == 'avc1') {
outputVideoCodec = savedThis.getAVCCodec(outputVideoDimensions.width, outputVideoDimensions.height, newVideoBitrate);
} else if (output_video_codec == 'hvc1') {
outputVideoCodec = savedThis.getHVC1Codec(outputVideoDimensions.width, outputVideoDimensions.height, newVideoBitrate);
}
if (savedThis.logs) console.log('outputVideoCodec', outputVideoCodec);
videoEncoder = new VideoEncoder({
output(chunk, metadata) {
let uint8 = new Uint8Array(chunk.byteLength);
chunk.copyTo(uint8);
if (videoTrak === null) {
let addTrakData = {
type: 'video',
width: outputVideoDimensions.width,
height: outputVideoDimensions.height,
codec: outputVideoCodec
};
if (output_video_codec == 'avc1') {
addTrakData.avcDecoderConfigRecord = metadata.decoderConfig.description;
} else if (output_video_codec == 'hvc1') {
addTrakData.hvcDecoderConfigRecord = metadata.decoderConfig.description;
addTrakData.hevcParams = {
profileSpace: 0,
tierFlag: 0,
profileIdc: 1,
profileCompatibility: 0x60000000,
levelIdc: 93, // Level 3.1
constraintIndicatorFlags: new Uint8Array([0x90, 0x00, 0x00, 0x00, 0x00, 0x00]),
chromaFormat: 1, // 4:2:0
bitDepth: 8
};
}
videoTrak = savedThis.addTrak(
mp4boxOutputFile,
addTrakData,
output_video_codec
);
}
const sampleDuration = sampleVideoDurations.shift() / (1_000_000 / savedThis.VIDEO_TIMESCALE);
savedThis.addSample(
mp4boxOutputFile,
videoTrak,
uint8,
chunk.type === 'key',
sampleDuration,
/* addDuration */ true,
output_video_codec,
metadata
);
encodedVideoFrameIndex++;
displayProgress();
},
error(error) {
if (savedThis.logs) console.error(error);
savedThis.in_onError(error);
}
});
if (savedThis.logs) console.log('videoEncoder.configure', JSON.stringify({
codec: outputVideoCodec,
width: outputVideoDimensions.width,
height: outputVideoDimensions.height,
hardwareAcceleration: 'prefer-hardware',
bitrate: newVideoBitrate,
bitrateMode: 'variable',
alpha: 'discard',
latencyMode: encoder_latencyMode,
}));
videoEncoder.configure({
codec: outputVideoCodec,
width: outputVideoDimensions.width,
height: outputVideoDimensions.height,
hardwareAcceleration: 'prefer-hardware',
bitrate: newVideoBitrate,
bitrateMode: 'variable',
alpha: 'discard',
latencyMode: encoder_latencyMode
});
mp4boxInputFile.setExtractionOptions(videoTrack.id, null, { nbSamples: Infinity });
}
if (audioTrack) {
savedThis.AUDIO_TIMESCALE = audioTrack.timescale;
savedThis.AUDIO_SAMPLERATE = audioTrack.audio.sample_rate;
savedThis.AUDIO_SAMPLESIZE = audioTrack.audio.sample_size;
savedThis.AUDIO_CHANNELCOUNT = audioTrack.audio.channel_count;
inputAudioBitrate = audioTrack.bitrate;
var audioDecoder_isFirst = true;
audioDecoder = new AudioDecoder({
async output(audioData) {
if (savedThis.itsOnError) {
return false;
}
var allowedFrame = true;
if (start_timestamp !== false) {
if (audioData.timestamp < start_timestamp) {
allowedFrame = false;
}
}
if (allowedFrame) {
if (audioDecoder_isFirst) {
audioDecoder_isFirst = false;
audioEncoder.encode(audioData, { keyFrame: true });
} else {
audioEncoder.encode(audioData);
}
audioSendedToEncodeCount++;
} else {
audioFrameCount--;
}
audioData.close();
decodedAudioFrameIndex++;
displayProgress();
},
error(error) {
if (savedThis.logs) console.error(error);
}
});
var audioCodec = audioTrack.codec;
let audio_description;
const audio_trak = mp4boxInputFile.getTrackById(audioTrack.id);
for (const entry of audio_trak.mdia.minf.stbl.stsd.entries) {
if (entry.dOps) {
const stream = new DataStream(undefined, 0, DataStream.BIG_ENDIAN);
if (entry.dOps) {
entry.dOps.write(stream);
}
audio_description = new Uint8Array(stream.buffer); // Remove the box header.
break;
}
}
var audioDecoderConfigParams = {
codec: audioCodec,
numberOfChannels: audioTrack.audio.channel_count,
sampleRate: audioTrack.audio.sample_rate,
};
if (audio_description !== undefined) {
audioDecoderConfigParams.description = audio_description;
}
audioDecoder.configure(audioDecoderConfigParams);
audioEncoder = new AudioEncoder({
output(chunk, metadata) {
let uint8 = new Uint8Array(chunk.byteLength);
chunk.copyTo(uint8);
if (audioTrak === null) {
audioTrak = savedThis.addTrak(
mp4boxOutputFile,
{
type: 'audio',
codec: outputAudioCodec,
audioAvgBitrate: newAudioBitrate,
decoderConfig_description: audio_description
},
output_video_codec
);
}
const sampleDuration = sampleAudioDurations.shift() / (1_000_000 / savedThis.AUDIO_TIMESCALE);
savedThis.addSample(
mp4boxOutputFile,
audioTrak,
uint8,
chunk.type === 'key',
sampleDuration,
/* addDuration */ !videoTrack,
);
encodedAudioFrameIndex++;
displayProgress();
},
error(error) {
if (savedThis.logs) console.error(error);
savedThis.in_onError(error);
}
});
if (savedThis.logs) console.log('outputAudioCodec', outputAudioCodec);
if (savedThis.logs) console.log('supportedAudioBitrates', supportedAudioBitrates);
var newAudioBitrate = supportedAudioBitrates[savedThis.findClosestIndex(supportedAudioBitrates, Math.round(audioTrack.bitrate))];
if (savedThis.logs) console.log('newAudioBitrate', newAudioBitrate);
audioEncoder.configure({
codec: outputAudioCodec,
numberOfChannels: audioTrack.audio.channel_count,
sampleRate: audioTrack.audio.sample_rate,
bitrate: Math.round(newAudioBitrate),
bitratemode: "variable"
});
mp4boxInputFile.setExtractionOptions(audioTrack.id, null, { nbSamples: Infinity });
}
mp4boxInputFile.start();
mp4boxInputFileReadyPromise_resolver();
});
});
};
// ETA in ms
var video_eta = {
'decoding_percentage': 0,
'decoding_eta': null,
'encoding_percentage': 0,
'encoding_eta': null,
'total_percentage': 0,
'total_eta': null
};
function displayProgress() {
var progressData = {};
if (videoTrack) {
let elapsed_time_ms = Math.round(performance.now()) - Math.round(startNow);
let video_decoding_percentage = Math.round(100 * decodedVideoFrameIndex / videoFrameCount);
if (video_decoding_percentage > video_eta['decoding_percentage']) {
video_eta['decoding_percentage'] = video_decoding_percentage;
if (video_decoding_percentage >= 100) {
video_eta['decoding_eta'] = 0;
} else {
video_eta['decoding_eta'] = (elapsed_time_ms * 100 / video_decoding_percentage) - elapsed_time_ms;
}
}
let video_encoding_percentage = Math.round(100 * encodedVideoFrameIndex / videoFrameCount);
if (video_encoding_percentage > video_eta['encoding_percentage']) {
video_eta['encoding_percentage'] = video_encoding_percentage;
if (video_encoding_percentage >= 100) {
video_eta['encoding_eta'] = 0;
} else {
video_eta['encoding_eta'] = (elapsed_time_ms * 100 / video_encoding_percentage) - elapsed_time_ms;
}
}
let video_total_percentage = video_decoding_percentage + video_encoding_percentage;
if (video_total_percentage > video_eta['total_percentage']) {
video_eta['total_percentage'] = video_total_percentage;
if (video_total_percentage >= 200) {
video_eta['total_eta'] = 0;
} else {
video_eta['total_eta'] = ((elapsed_time_ms * 200 / video_total_percentage) * 1.1) - elapsed_time_ms;
}
}
progressData['video'] = {
'decoding': {
'index': decodedVideoFrameIndex,
'count': videoFrameCount,
'percentage': video_decoding_percentage,
'percentage_original': 100 * decodedVideoFrameIndex / videoFrameCount,
'eta': video_eta['decoding_eta']
},
'encoding': {
'index': encodedVideoFrameIndex,
'count': videoFrameCount,
'percentage': video_encoding_percentage,
'percentage_original': 100 * encodedVideoFrameIndex / videoFrameCount,
'eta': video_eta['encoding_eta']
},
'eta': video_eta['total_eta']
};
}
if (audioTrack) {
progressData['audio'] = {
'decoding': {
'index': decodedAudioFrameIndex,
'count': audioFrameCount,
'percentage': Math.round(100 * decodedAudioFrameIndex / audioFrameCount),
'percentage_original': 100 * decodedAudioFrameIndex / audioFrameCount
},
'encoding': {
'index': encodedAudioFrameIndex,
'count': audioFrameCount,
'percentage': Math.round(100 * encodedAudioFrameIndex / audioFrameCount),
'percentage_original': 100 * encodedAudioFrameIndex / audioFrameCount
}
};
}
savedThis.onProgress(progressData);
}
function findNearestKeyframe(samples, startTime, timescale) {
// Convertimos startTime a unidades de cts usando el timescale
const targetCts = startTime * timescale / 1_000_000;
// Inicializamos las variables de búsqueda
let nearestKeyframe = null;
for (const sample of samples) {
// Verificamos si es un keyframe
if (sample.is_sync) {
// Si es el primer keyframe o está más cerca del targetCts, lo guardamos
if (!nearestKeyframe || sample.cts <= targetCts) {
nearestKeyframe = sample;
} else {
// Si encontramos un keyframe posterior al target, dejamos de buscar
break;
}
}
}
// Verificamos que encontramos un keyframe válido
if (!nearestKeyframe) {
throw new Error("No keyframe found before the specified startTime.");
}
return {
keyframe: nearestKeyframe,
timestamp: nearestKeyframe.cts * 1_000_000 / timescale, // Convertimos a microsegundos
};
}
function filterFramesByRange(frames, startTime, endTime, timescale, keyframeCts) {
if (savedThis.logs) console.log('filterFramesByRange timescale', timescale);
// Convertimos los tiempos a cts (unidades del timescale)
const startCts = (startTime * timescale) / 1_000_000;
var endCts = Infinity;
if (endTime !== false) {
endCts = (endTime * timescale) / 1_000_000;
}
if (savedThis.logs) console.log('cts', startCts, endCts);
if (savedThis.logs) console.log('keyframeCts', keyframeCts);
const filteredFrames = frames.filter((frame) => {
return frame.cts >= keyframeCts && frame.cts <= endCts;
});
return filteredFrames;
}
var groupsOfVideoChunks;
var groupsOfAudioChunks;
mp4boxInputFile.onSamples = function (track_id, ref, samples) {
if (savedThis.itsOnError) {
return false;
}
let filteredFrames = samples;
if (start_timestamp !== false) {
const nearestKeyframeInfo = findNearestKeyframe(samples, start_timestamp, samples[0].timescale);
filteredFrames = filterFramesByRange(samples, start_timestamp, end_timestamp, samples[0].timescale, nearestKeyframeInfo.keyframe.cts);
}
// console.log('filteredFrames', filteredFrames);
let videoChunks = [];
let audioChunks = [];
for (const sample of filteredFrames) {
const chunk = {
type: sample.is_sync ? "key" : "delta",
timestamp: sample.cts * 1_000_000 / sample.timescale,
duration: sample.duration * 1_000_000 / sample.timescale,
data: sample.data
};
if (videoTrack && track_id === videoTrack.id) {
videoFrameCount++;
sampleVideoDurations.push(sample.duration * 1_000_000 / sample.timescale);
videoChunks.push(chunk);
// videoDecoder.decode(new EncodedVideoChunk(chunk));
} else if (audioTrack && track_id === audioTrack.id) {
audioFrameCount++;
sampleAudioDurations.push(sample.duration * 1_000_000 / sample.timescale);
audioChunks.push(chunk);
// audioDecoder.decode(new EncodedAudioChunk(chunk));
}
}
filteredFrames = null;
if (videoChunks.length > 0) {
groupsOfVideoChunks = splitGroupOfVideoChunks(videoChunks);
processGroupsOfVideoChunks();
}
if (audioChunks.length > 0) {
groupsOfAudioChunks = [audioChunks];
processGroupsOfAudioChunks();
}
}
async function processGroupsOfVideoChunks() {
for (const groupOfChunks of groupsOfVideoChunks) {
for (const chunkItem of groupOfChunks) {
if (savedThis.itsOnError) {
return false;
}
var whileController = true;
while (whileController) {
if (videoDecoder.decodeQueueSize < queue_max_size && videoEncoder.encodeQueueSize < queue_max_size) {
try {
videoDecoder.decode(new EncodedVideoChunk(chunkItem));
} catch (error) {
savedThis.in_onError(error);
throw new Error("Decode frame error.");
}
whileController = false;
} else {
await sleep(1);
}
}
}
await videoDecoder.flush();
}
videoDecoder.close();
let whileController_ii = true;
while (whileController_ii) {
if (videoEncoder.encodeQueueSize == 0) {
whileController_ii = false;
encodedFinishedPromise_resolved = true;
encodedFinishedPromise_resolver();
} else {
await sleep(3);
}
}
}
async function processGroupsOfAudioChunks() {