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samirkumardas / jmuxer

jMuxer - a simple javascript mp4 muxer that works in both browser and node environment.
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Failed to extract any NAL units from video data: #124

Open Ascol14 opened 1 year ago

Ascol14 commented 1 year ago

Hello. I don't really good obtain the packet. Wow who obtain the duration in byte ?

My server.js : `const WebSocket = require('ws'); const fs = require('fs'); const { exec } = require('child_process'); var iconvlite = require('iconv-lite');

const express = require('express') const app = express() const port = 3000

app.use(express.static('public'))

app.listen(port, () => { console.log(Example app listening on port ${port}) })

const PORT = process.env.PORT || 8080; let minNaluPerChunk = 30, interval = 0, current = 0, start = 0, end = 0, wss; function extractChunks(buffer) { let i = 0, length = buffer.byteLength, naluCount = 0, value, unit, ntype, state = 0, lastIndex = 0, result = [];

while (i < length) {
    value = buffer[i++];
    // finding 3 or 4-byte start codes (00 00 01 OR 00 00 00 01)
    switch (state) {
        case 0:
            if (value === 0) {
                state = 1;
            }
            break;
        case 1:
            if (value === 0) {
                state = 2;
            } else {
                state = 0;
            }
            break;
        case 2:
        case 3:
            if (value === 0) {
                state = 3;
            } else if (value === 1 && i < length) {
                if (lastIndex) {
                    unit = buffer.slice(lastIndex, i - state -1);
                    ntype = unit[0] & 0x1f;
                    naluCount++;
                }
                if (naluCount >= minNaluPerChunk && ntype !== 1 && ntype !== 5) {
                    result.push(lastIndex - state -1);
                    naluCount = 0;
                }
                state = 0;
                lastIndex = i;
            } else {
                state = 0;
            }
            break;
        default:
            break;
    }
}
if (naluCount > 0) {
    result.push(lastIndex);
}
return result;

}

let buffer = fs.readFileSync('./demo.h264'); let chunks = extractChunks(buffer); let total = chunks.length;

function openSocket() { wss = new WebSocket.Server({ port: PORT }); console.log('Server ready on port '+PORT); wss.on('connection', function connection(ws) { console.log('Socket connected. sending data...'); if (interval) { clearInterval(interval); } ws.on('error', function error(error) { console.log('WebSocket error'); }); ws.on('close', function close(msg) { console.log('WebSocket close'); });

      interval = setInterval(function() {
        sendChunk();
      }, 800);
});

}

function writeChunk() { for (i = 0; i < chunks.length; i++) { end = chunks[i]; chunk = buffer.slice(start, end); start = end; if (i == 3) { console.log(chunk) } fs.writeFile("./h264/" + i + '.h264', chunk, "binary", function(err) { if(err) { console.log(err); exec('touch h264/' + i + '.h264'); fs.writeFile("h264/" + i + '.h264', chunk, "binary", function(err) { if(err) { console.log(err); } }); } }); } } writeChunk();

function sendChunk() { let anybodyThere = false; if (current >= total) { current = 0; start = 0; } end = chunks[current]; current++; wss.clients.forEach(function each(client) { let chunk; if (client.readyState === WebSocket.OPEN) { anybodyThere = true; chunk = buffer.slice(start, end); start = end; try { client.send(JSON.stringify({data : chunk, type : "v"})); } catch(e) { console.log(Sending failed:, e); } if (current % 50 == 0) { console.log(I am serving, no problem!); } if (current == 0) { console.log(Started from first chunk...); } } });

if (!anybodyThere) {
    if (interval) {
        current = start = end = 0;
        clearInterval(interval);
        console.log('nobody is listening. Removing interval for now...');
    }
}

} openSocket();`

My index.html : `<!DOCTYPE html>

JMuxer demo

Prerequisite command: `node h264.js`

`

dtbaker commented 1 year ago

did you figure this out @Ascol14 ?

puchunbing commented 8 months ago

Hello, have you solved this problem? I am also encountering this bug now