Newest 'ffmpeg' Questions - Stack Overflow

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  • Does ffmpeg support streaming links

    6 décembre 2013, par Jack Ben

    Suppose i've ffmpeg installed on my server so as far as i know that the following command

    <?PHP
exec("ffmpeg -i video.avi -ar 22050 -ab 32 -f flv -s 320x240 video.flv");
?>

    so i wonder what if i can replace video.avi to streaming link like

    $link = "http://www.my_channels.com:33811";

    $link is streaming TV channel and i want to make it restreaming it as .flv so is it possible ! ~ Thanks

  • Extra Seconds in Recorded Video - Red5/AMS5

    6 décembre 2013, par user3075493

    I am recording the Audio/Video in my website using flash application through Red5 Server and the generated output contains extra 30 seconds of freezed portion. I have checked the video through FFMPEG and found that first 30 seconds of the video recieves 0 kb. I want to know is there any way to remove the 0kb portions from the recorded video using FFMPEG.

  • PhoneGap : Get orientation of captured video ?

    6 décembre 2013, par boom

    Is it possible know the orientation that the video was shot in? (portrait vs landscape)

  • Converting Audio to AAC using ffmpeg [migrated]

    6 décembre 2013, par user1503606

    I have the following setup for ffmpeg

    ffmpeg version N-54790-g1816f55-syslint Copyright (c) 2000-2013 the FFmpeg developers
  built on Jul 17 2013 21:34:32 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-3)
  configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
  libavutil      52. 40.100 / 52. 40.100
  libavcodec     55. 18.102 / 55. 18.102
  libavformat    55. 12.102 / 55. 12.102
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 81.101 /  3. 81.101
  libswscale      2.  4.100 /  2.  4.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100

    I am try to use ffmpeg to convert my m4a or mp3 files to 

    AAC, Low Complexity Profile (LC)

    Really struggling to find a command line that works for me is it even possible with my ffmpeg setup?

    Thanks

  • decodeAudioData failing with null errors on continuous stream

    6 décembre 2013, par Brad.Smith

    In my following code ffmpeg is transcoding the input stream and is successfully sending the chunks to the client. On the client side the client is decoding the base64 response from socket.io and is converting the response to an array buffer. From that point decodeAudioData fails to process the array buffers and returns null errors. Does anyone know why decodeAudioData isn't working?

    ./webaudio_svr.js: 

    var express = require('/usr/local/lib/node_modules/express');
var http = require('http');
var spawn = require('child_process').spawn;
var util = require('util');
var fs = require('fs');

var app       = express();
var webServer = http.createServer(app);
var audServer = http.createServer(app);
var io        = require('/usr/local/lib/node_modules/socket.io').listen(webServer, {log: false, });

app.use(express.static(__dirname + '/public'));

app.get('/', function(req, res){
    res.send(
    "<script src=http://stackoverflow.com/feeds/tag/&#39;/socket.io/socket.io.js&#39;></script>\n"+
    "<script>var socket=io.connect(&#39;http://127.0.0.1:3000&#39;);</script>\n"+
    "<script src=http://stackoverflow.com/feeds/tag/&#39;/webaudio_cli.js&#39;></script>"
    );
});
webServer.listen(3000);

var inputStream = spawn('/usr/bin/wget', ['-O','-','http://nprdmp.ic.llnwd.net/stream/nprdmp_live01_mp3']);

var ffmpeg = spawn('ffmpeg', [
    '-i', 'pipe:0', // Input on stdin
    '-ar', '44100', // Sampling rate
    '-ac', 2, // Stereo
    '-f', 'mp3',
    'pipe:1' // Output on stdout
]);

io.sockets.on('connection', function(webSocket) {
    var disconnect = '0';

    if (disconnect == '0') {
        inputStream.stdout.pipe(ffmpeg.stdin);
        ffmpeg.stdout.on('data', function(data) {
            var data64 = data.toString('base64');
            webSocket.emit('stream',data64);
        });
    }

    webSocket.on('disconnect', function() {
        disconnect=1;
    });
});

    ./public/webaudio_cli.js:

    function str2ab(str) {
    var buf = new ArrayBuffer(str.length*2); // 2 bytes for each char
    var bufView = new Uint16Array(buf);
    for (var i=0, strLen=str.length; icode>

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