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• How to fix here "EPIPE" in Node js Socket.io

  23 avril, par Mehdi008

  Receiving this error :

  


  Error: write EPIPE
        at afterWriteDispatched (node:internal/stream_base_commons:161:15)
        at writeGeneric (node:internal/stream_base_commons:152:3)
        at Socket._writeGeneric (node:net:958:11)
        at Socket._write (node:net:970:8)
        at doWrite (node:internal/streams/writable:598:12)
        at clearBuffer (node:internal/streams/writable:783:7)
        at onwrite (node:internal/streams/writable:653:7)
        at WriteWrap.onWriteComplete [as oncomplete] (node:internal/stream_base_commons:107:10)
    Emitted 'error' event on Socket instance at:
        at emitErrorNT (node:internal/streams/destroy:169:8)
        at emitErrorCloseNT (node:internal/streams/destroy:128:3)
        at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
      errno: -4047,
      code: 'EPIPE',
      syscall: 'write'
    }


  


  // for this code: const { spawn } = require("child_process");

module.exports = (socket, pool) => {
    
    let stream_req_token = "";
    let rtmps_array = [];

    socket.on("stream_request_token",async(token)=>{

        const stream_reqs = await pool`SELECT * FROM stream_request WHERE token=${token}`;


        if(stream_reqs.length === 0){
            
            socket.emit("token_validation_response",false);
            return;
        }

        const stream_req = stream_reqs[0];

        if(!stream_req.is_valid){

            socket.emit("token_validation_response",false);
            return;
        }

        socket.emit("token_validation_response",true);

        stream_req_token = token;


    })

    socket.on("rtmps_array",async(array)=>{

        try{

            const rtmps = JSON.parse(array);

        const streams_requests = await pool`SELECT id FROM stream_request WHERE token=${stream_req_token}`;
        const stream_req_id = streams_requests[0].id;

        rtmps_array = rtmps;

        rtmps.map(async(rtmp)=>{

            await pool`INSERT INTO stream (platform,url,url_key,stream_request_id) 
            VALUES(${rtmp.platform},${rtmp.url},${rtmp.key},${stream_req_id})`;
        })

        socket.emit("rtmps_array_response",true);

        } catch(err){

            console.log(err);
            socket.emit("rtmps_array_response",false);

        }


    })

    //Start Streaming
    let ffmpegProcess = null;
    let isStreaming = false; // Flag to track streaming state

  socket.on("stream", (chunk) => {
    if (!ffmpegProcess) {
        console.log('Initializing FFmpeg process...');

        // Spawn FFmpeg process
        const resolution = "1280x720"; // Change to "1920x1080" for 1080p

        const ffmpegArgs = [
            "-i", "pipe:0", // Input from stdin
            "-c:v", "libx264", // Video codec
            "-preset", "veryfast", // Low latency encoding
            "-b:v", "4500k", // Target average bitrate (4.5 Mbps)
            "-minrate", "2500k", // Minimum bitrate
            "-maxrate", "6000k", // Maximum bitrate
            "-bufsize", "16000k", // Buffer size (twice the max bitrate)
            "-r", "30", // **FORCE 30 FPS**
            "-g", "60", // Keyframe interval (every 2 seconds)
            "-tune", "zerolatency", // Low latency tuning
            "-sc_threshold", "0", // Constant bitrate enforcement
            "-flags", "+global_header",
          
            // **Resolution Fix**
            "-s", resolution, // **Set resolution to 720p or 1080p**
            "-aspect", "16:9", // **Maintain aspect ratio**
            
            // **Frame Rate Fix**
            "-vsync", "cfr", // **Forces Constant Frame Rate (CFR)**
            "-fps_mode", "cfr", // **Prevents FFmpeg from auto-adjusting FPS**
            
            // Audio settings
            "-c:a", "aac",
            "-b:a", "128k", // Audio bitrate
            "-ar", "44100", // Audio sample rate
            "-ac", "2", // Stereo audio
          
            "-f", "flv" // Output format
          ];
      
          // Map the streams to multiple RTMP destinations
          rtmps_array.forEach((rtmp) => {
            ffmpegArgs.push("-map", "0:v:0", "-map", "0:a:0", "-f", "flv", `${rtmp.url}/${rtmp.key}`);
          });
      
          // Spawn FFmpeg process
          ffmpegProcess = spawn("ffmpeg", ffmpegArgs);

        ffmpegProcess.stderr.on('data', (data) => {
            console.log(`FFmpeg STDERR: ${data}`);
    });

        ffmpegProcess.on('close', (code) => {
            console.log(`FFmpeg process closed with code ${code}`);
            ffmpegProcess = null; // Reset process
            isStreaming = false; // Reset streaming state
        });

        ffmpegProcess.on('error', (err) => {
            console.error(`FFmpeg process error: ${err.message}`);
            ffmpegProcess = null; // Reset process
            isStreaming = false; // Reset streaming state
        });

        console.log('FFmpeg process started.');
        isStreaming = true; // Set streaming state to true
    }

    // Write chunk to FFmpeg process
    if (isStreaming && ffmpegProcess && ffmpegProcess.stdin && !ffmpegProcess.stdin.destroyed) {
        try {
            ffmpegProcess.stdin.write(chunk); // Write chunk to stdin
            console.log('Chunk written to FFmpeg.');
        } catch (err) {
            console.error('Error writing chunk to FFmpeg stdin:', err.message);
        }
    } else {
        console.error('FFmpeg process or stdin is not ready.');
    }
});

socket.on("stop-stream", async() => {
    console.log('Stream Stopped.');

    if(stream_req_token.length !== 0){

        await pool`UPDATE stream_request 
               SET is_valid=false
               WHERE token=${stream_req_token}`

        await pool`DELETE FROM current_streams WHERE id=${stream_req_token}`;       
    }

    if (ffmpegProcess) {
        isStreaming = false; // Set streaming state to false

        try {
            // Check if stdin is open before closing
            if (ffmpegProcess.stdin) {
                ffmpegProcess.stdin.end(); // End stdin safely
            }

            // Wait for FFmpeg to close before setting to null
            ffmpegProcess.on("close", () => {
                console.log("FFmpeg process closed.");
                ffmpegProcess = null;
            });

            // Kill FFmpeg process
            ffmpegProcess.kill("SIGTERM"); // Use SIGTERM for graceful exit

        } catch (err) {
            console.error("Error while stopping FFmpeg:", err.message);
        }
    } else {
        console.log("No active FFmpeg process.");
    }
});


socket.on('error', (err) => {
  console.error('Socket error:', err);
});

socket.on("disconnect", async() => {
    console.log('Client Disconnected.');

    if(stream_req_token.length !== 0){

        await pool`UPDATE stream_request 
               SET is_valid=false
               WHERE token=${stream_req_token}`;

        await pool`DELETE FROM current_streams WHERE id=${stream_req_token}`;       

    }
    
    if (ffmpegProcess) {
        isStreaming = false; // Set streaming state to false

        try {
            // Check if stdin is open before closing
            if (ffmpegProcess.stdin) {
                ffmpegProcess.stdin.end(); // End stdin safely
            }

            // Wait for FFmpeg to close before setting to null
            ffmpegProcess.on("close", () => {
                console.log("FFmpeg process closed.");
                ffmpegProcess = null;
            });

            // Kill FFmpeg process
            ffmpegProcess.kill("SIGTERM"); // Use SIGTERM for graceful exit


        } catch (err) {
            console.error("Error while stopping FFmpeg:", err.message);
        }
    } else {
        console.log("No active FFmpeg process.");
    }
});

};


  


  


• What format/protocol does ffmpeg use for "raw" output ?

  18 avril 2017, par MSalters

  Given a commandline ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" -ar 8000 -c:a FOO pipe:1, ffmpeg might complain it’s "unable to find a suitable output format". For some codecs, ffmpeg has a default container format, e.g. -c:a libmp3lame will produce MP3’s. For other codecs, you just repeat yourself (sort of) : -c:a pcm_alaw -f alaw

  But what if I want to stream the raw codec output, and there’s no matching -f ? Can I just take -f alaw and assume that it doesn’t do anything ? (G711 alaw is a simple codec which produces a byte stream, so -f alaw presumably just copies that byte stream)

  Obviously the other side of the pipe needs to know how the data stream needs to be interpreted, if there’s no container info. But assume that I already know the other side of the pipe is expecting an audio stream, sampled at 8 kHz, encoded with -c:a FOO.

• Revert "avcodec/bsf : Forbid packet without payload in av_bsf_send_packet"

  23 avril 2017, par James Almer

  Revert "avcodec/bsf : Forbid packet without payload in av_bsf_send_packet"
  This reverts commit bfdca87ab55c7f69087d962dc47aa45c8c6436fb.
  Packets with no data or side data will be valid EOF signal in an
  
  upcoming merge.
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/avcodec.h
  • [DH] libavcodec/bsf.c