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• ffmpeg hangs when muxing longer videos

  11 août 2020, par 492357816

  I am using ffmpeg with Janus WebRTC server for muxing video conference recordings. For video conferences under approximaately 5 minutes duration, existing code works well. If the source files are longer than that the process appears to hang without returning either an error or a completed file.
Any advice/suggestions would be most welcome.

  


      var recordingsPath = exports.recordingsPath;
    var videoRecordingPath = `${recordingsPath}/${filename}-video.mjr`;
    var audioRecordingPath = `${recordingsPath}/${filename}-audio.mjr`;
    var videoOutputPath = `${recordingsPath}/${filename}-output1.mp4`;
    var audioOutputPath = `${recordingsPath}/${filename}-output1.wav`;
    var finalOutputPath = `${recordingsPath}/${filename}-final.mp4`;
    var rawConverterPath = "/opt/janus/bin/janus-pp-rec";
    var audioRecordingByteSize = exports.getFileSizeInBytes(audioRecordingPath);
    var audioIsValid = audioRecordingByteSize > 8;

    if (audioIsValid) {
        //turn audio and video mjr files into .wav and mp4 respectively
        exports.runBashSync([ rawConverterPath, videoRecordingPath, videoOutputPath]);
        exports.runBashSync([ rawConverterPath, audioRecordingPath, audioOutputPath]);
        return exports.mergeMp4AndWav(
            audioOutputPath, videoOutputPath, finalOutputPath
        ).then(function(result) {
            // remove source data for audio & video
            exports.runBashSync([ "rm", audioOutputPath]);
            exports.runBashSync([ "rm", videoOutputPath]);
            exports.runBashSync([ "rm", audioRecordingPath]);
            exports.runBashSync([ "rm", videoRecordingPath]);
        });
    } else {
        // handle cases where audio is not available
        feedback("no audio");
        return new Promise(function(resolve) {
            exports.runBashSync([ rawConverterPath, videoRecordingPath, finalOutputPath], true);
            if (Number.isInteger(audioRecordingByteSize)) {
                exports.runBashSync([ "rm", audioRecordingPath]);
            }
            exports.runBashSync([ "rm", videoRecordingPath]);
            resolve(true);
        });
    }
};

exports.joinMp4s = function(mp4Filenames, outputPath) {
    feedback("joining mp4s");
    if (mp4Filenames.length === 1) {
        feedback("single-stream case");
        exports.runBashSync(["mv", mp4Filenames[0], outputPath]);
        return new Promise(function(resolve) { resolve(true); });
    }
    feedback("multi-stream case");
    var joinCmd = ["ffmpeg"];
    mp4Filenames.forEach(function(filename) {
        joinCmd.push(`-i ${filename}`);
    });
    joinCmd.push("-strict -2");
    var totalHeight = 960;
    var totalWidth = 1280;

    joinCmd.push(`-filter_complex "color=size=${totalWidth}x${totalHeight}:c=Black [base];`);

    // var numStrms = mp4Filenames.length;
    var streamsPattern = exports.setStreamsPattern(mp4Filenames);
    var strmHeight = streamsPattern.height;
    var strmWidth = streamsPattern.width;
    var strmDmns = `${strmWidth}x${strmHeight}`;
    feedback("streamDimensions: " + strmDmns);

    var i;
    for (i = 0; i < mp4Filenames.length; i++) {
        joinCmd.push(`[${i}:v] setpts=PTS-STARTPTS, scale=${strmDmns} [temp${i}];`);
    }
    for (i = 0; i < mp4Filenames.length; i++) {
        var xCoord;
        var yCoord;
        if (i === 0) {
            xCoord = streamsPattern.coords[i].xCoord;
            yCoord = streamsPattern.coords[i].yCoord;
            joinCmd.push(`[base][temp${i}] overlay=shortest=1:x=${xCoord}:y=${yCoord} [tmp${i + 1}];`);
            // joinCmd.push(`[base][temp${i}] overlay=shortest=1 [tmp${i + 1}];`);
        } else {
            var cmd = `[tmp${i}][temp${i}] overlay=shortest=1`;
            xCoord = streamsPattern.coords[i].xCoord;
            yCoord = streamsPattern.coords[i].yCoord;

            if (xCoord) { cmd += ":x=" + xCoord; }
            if (yCoord) { cmd += ":y=" + yCoord; }

            if (i + 1 !== mp4Filenames.length) { cmd += ` [tmp${i + 1}];`; }
            joinCmd.push(cmd);
        }
    }

    joinCmd.push(`" ${outputPath}`);
    feedback("join command: " + joinCmd);
    return exports.runBashAsync(joinCmd).then(function(result) {

        mp4Filenames.forEach(function(filename) {
            feedback("removing: " + filename);
            exports.runBashSync(`rm ${filename}`);
        });
    });
};



  


• Anomalie #4729 : problème d’affichage dans la colone date

  16 avril 2021

  En fait quel est le problème ?

  Parce que "2019-W16" ça veut dire Semaine 16 de 2019…
  C’est ça qui te gène ?

  C’est un format de date normalisé aussi.
  https://en.wikipedia.org/wiki/ISO_week_date

• Linux distribution with built-in ffmpeg library

  18 novembre 2020, par Rouki

  Is there a Linux distribution with a built-in ffmpeg library (compiled) ?

  


  It seems to cause a lot of problems to install ffmpeg these days (for development). No matter how hard I tried using this wiki, it refuses to link properly. A lot of undefined references...