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simplify server for record-audio-video-stream #39

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simplify server for record-audio-video-stream #39

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107 changes: 50 additions & 57 deletions examples/record-audio-video-stream/server.js
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ const { StreamInput } = require('fluent-ffmpeg-multistream')
const VIDEO_OUTPUT_SIZE = '320x240'
const VIDEO_OUTPUT_FILE = './recording.mp4'

let UID = 0;
let STREAM_ID = 0;

function beforeOffer(peerConnection) {
const audioTransceiver = peerConnection.addTransceiver('audio');
Expand All @@ -22,22 +22,37 @@ function beforeOffer(peerConnection) {
const audioSink = new RTCAudioSink(audioTransceiver.receiver.track);
const videoSink = new RTCVideoSink(videoTransceiver.receiver.track);

const streams = [];
let idleSaveTimeout = null;
let recordings = []
let stream;

videoSink.addEventListener('frame', ({ frame: { width, height, data }}) => {
const size = width + 'x' + height;
if (!streams[0] || (streams[0] && streams[0].size !== size)) {
UID++;
if (!stream || (stream && stream.size !== size)) {
if(idleSaveTimeout){
clearTimeout(idleSaveTimeout);
}
if (stream) {
// Disconnect previous stream:
if (stream.audio) {
stream.audio.end();
}
stream.video.end();
recordings.push(stream.recordPath);
}

const stream = {
recordPath: './recording-' + size + '-' + UID + '.mp4',
// Create a new stream:
stream = {
id: STREAM_ID++,
recordPath: './recording-' + size + '-' + STREAM_ID + '.mp4',
size,
video: new PassThrough(),
audio: new PassThrough()
};

const onAudioData = ({ samples: { buffer } }) => {
if (!stream.end) {
// If we've connected a new stream, then stream.id !== STREAM_ID
if (stream.id === STREAM_ID) {
stream.audio.push(Buffer.from(buffer));
}
};
Expand All @@ -47,18 +62,6 @@ function beforeOffer(peerConnection) {
stream.audio.on('end', () => {
audioSink.removeEventListener('data', onAudioData);
});

streams.unshift(stream);

streams.forEach(item=>{
if (item !== stream && !item.end) {
item.end = true;
if (item.audio) {
item.audio.end();
}
item.video.end();
}
})

stream.proc = ffmpeg()
.addInput((new StreamInput(stream.video)).url)
Expand All @@ -78,7 +81,6 @@ function beforeOffer(peerConnection) {
console.log('Start recording >> ', stream.recordPath)
})
.on('end', ()=>{
stream.recordEnd = true;
console.log('Stop recording >> ', stream.recordPath)
})
.size(VIDEO_OUTPUT_SIZE)
Expand All @@ -87,52 +89,43 @@ function beforeOffer(peerConnection) {
stream.proc.run();
}

streams[0].video.push(Buffer.from(data));
stream.video.push(Buffer.from(data));
});

const { close } = peerConnection;
peerConnection.close = function() {
audioSink.stop();
videoSink.stop();

streams.forEach(({ audio, video, end, proc, recordPath })=>{
if (!end) {
if (audio) {
audio.end();
}
video.end();

// This should always be true, but just incase:
if (stream && stream.id === STREAM_ID) {
recordings.push(stream.recordPath);
if (stream.audio) {
stream.audio.end();
}
});

let totalEnd = 0;
const timer = setInterval(()=>{
streams.forEach(stream=>{
if (stream.recordEnd) {
totalEnd++;
if (totalEnd === streams.length) {
clearTimeout(timer);

const mergeProc = ffmpeg()
.on('start', ()=>{
console.log('Start merging into ' + VIDEO_OUTPUT_FILE);
})
.on('end', ()=>{
streams.forEach(({ recordPath })=>{
fs.unlinkSync(recordPath);
})
console.log('Merge end. You can play ' + VIDEO_OUTPUT_FILE);
});

streams.forEach(({ recordPath })=>{
mergeProc.addInput(recordPath)
});
stream.video.end();
}

idleSaveTimeout = setTimeout(() => {
const mergeProc = ffmpeg()
.on('start', ()=>{
console.log('Start merging into ' + VIDEO_OUTPUT_FILE);
})
.on('end', ()=>{
recordings.forEach((recordPath)=>{
fs.unlinkSync(recordPath);
})
recordings = [];
console.log('Merge end. You can play ' + VIDEO_OUTPUT_FILE);
});

mergeProc
.output(VIDEO_OUTPUT_FILE)
.run();
}
}
recordings.forEach((recordPath)=>{
mergeProc.addInput(recordPath)
});

mergeProc
.output(VIDEO_OUTPUT_FILE)
.run();
}, 1000)

return close.apply(this, arguments);
Expand Down