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Sur d’autres sites (14640)

  • Chrome "stalling" when streaming mp3 file from nodejs windows only

    8 octobre 2015, par Alan Hollis

    We’ve got a really annoying bug when trying to send mp3 data. We’ve got the following set up.

    Web cam producing aac -> ffmpeg convert to adts -> send to nodejs server -> ffmpeg on server converts adts to mp3 -> mp3 then streamed to browser.

    This works *perfectly" on Linux ( chrome with HTML5 and flash, firefox flash only )

    However on windows the sound just "stalls", no matter what combination we use ( browser/html5/flash ). If however we shutdown the server the sound then immediately starts to play as we expect.

    For some reason on windows based machines it’s as if the sound is being buffered "waiting" for something but we don’t know what that is.

    Any help would be greatly appreciated.

    Relevant code in node

        res.setHeader('Connection', 'Transfer-Encoding');
    
    res.setHeader('Content-Type', 'audio/mpeg');
    
    res.setHeader('Transfer-Encoding', 'chunked');
    
    res.writeHeader('206');
    

    
    that.eventEmitter.on('soundData', function (data) {
    
        debug("Got sound data" + data.cameraId + " " + req.params.camera_id);
    
        if (req.params.camera_id == data.cameraId) {
    
            debug("Sending data direct to browser");
    
            res.write(data.sound);
    
        }
    
    });

    Code on browser

           soundManager.setup({
    
                            url: 'http://dashboard.agricamera.co.uk/themes/agricamv2/swf/soundmanager2.swf',
    
                            useHTML5Audio: false,
    
                            onready: function () {
    
                                that.log("Sound manager is now ready")
    
                                var mySound = soundManager.createSound({
    
                                    url: src,
    
                                    autoLoad: true,
    
                                    autoPlay: true,
    
                                    stream: true,
    
                                });
    
                            }
    
                        });

  • doc : Mention -dn in the "Stream selection" paragraph.

    27 septembre 2016, par Carl Eugen Hoyos
    doc : Mention -dn in the "Stream selection" paragraph.

    There is no "Data options" paragraph.
    
Requested-by : ilker tezcan
    • [DH] doc/ffmpeg.texi

  • "opaque" pointer in ffmpeg AVFrame

    4 octobre 2016, par R2-D2

    In ffmpeg there is a structure AVFrame describing decoded video or audio data.

    It has a void pointer opaque. The documentation claims it is "for some private data of the user".

    What does this mean ?
    Can it be used to transport any additional data as per-frame metadata ?

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