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• ffmpeg : Streaming mpeg1 Video over HTTP Server

  23 juillet 2014, par user36685

  I ma trying to stream an mpg video over an http server using ffmepg. I initiate the ffserver and run the following command at the client :

  ffmpeg -i http://localhost:10212/Stream.mpg -y Sample.mpg

  I also tried the following but it did not also work :

  ffmpeg -i http://localhost:10212/Stream.mpg -b 2.6M -aspect "1280:720" -r 29 -g 29 -keyint_min 58 -ab 320000 -ar 48000 -ac 2 -f mpeg  "Sample.mpg" -vstats_file stats.txt

  But the Sample.mpg file is far less qualtiy and much smaller than the 480p.mpg file. I want the exact same 480p.mpg file with the same file size, bit rate, ratio, fps etc.

  My config file is as follow :

  <stream>
  
  
  
      File "/home/david/Documents/Video/Streaming/480p.mpg"
  
      format mpeg
  
  
  
      ACL allow 127.0.0.1
  
      ACL allow 192.168.1.0 192.168.1.255
  
  
  
  </stream>

• Audio and Video out of sync on Ubuntu 12 64 bit server

  4 juillet 2014, par Murat

  I am having problem with video and audio sync but not always. This is my ffmpeg code which am using.

  sudo ffmpeg -y -f mpegts -i ’udp ://@00.00.00.00:1111 ?fifo_size=1000000&overrun_nonfatal=1 \
   maxrate 2M -bufsize 2M \
   af volume=1.1 \
   strict experimental \
   c:a libfaac -ar 22050 -ac 2 -b:a 64k \
   vsync 1 -c:v libx264 -r 25 -vf yadif,scale=640:480 -aspect:v 16:9 -b:v 900k \
   preset superfast -tune zerolatency -threads 8 -crf 25 \
   map 0:0 -map 0:1 \
   f flv ’rtmp ://testt:testt@00.00.00.00:0000/live/1111’

  I am getting live mpegts data form source and after processing then trying send to wowza server via rtmp.

  I can reproduce problem, for example if i shake satellite then source is break down and after a while problem beginning. I can easily see sync problem between video and audio. Often audio ahead than video.

  When problem happening in the source how can i prevent sync problem between audio and video.

  regards,

  Murat

• Transcode livestream on the fly and output to another server

  3 juillet 2014, par user2757842

  Currently I have my live stream transcoding and saving to a destination on my desktop, but what I would like is to transcode it and send it to another server.

  I create the outstream I would like my stream to go but it returns this error :

  events.js:72
  
          throw er; // Unhandled 'error' event
  
                ^
  
  Error: ENOENT, open 'C:\Users\Jay\workspace\FFMPEGtest\http:\192.168.201.237\LiveSmoothStreaming.isml\Streams(video)'

  Any help would be appreciated

  Here is my code :

  var ffmpeg = require('./index.js');
  
  var fs = require('fs');
  
  
  
  var outStream = fs.createWriteStream('http://192.168.201.237/LiveSmoothStreaming.isml/Streams(video)');
  
  
  
  //set the path to the live stream
  
  var proc = new ffmpeg({ source: 'rtmp://localhost/livepkgr/livestream live=1', nolog: true, timeout: 432000, inputlive:true})
  
  
  
      //set video bitrate
  
      .withVideoBitrate(1024)
  
  
  
      //set h264 preset
  
      //.addOption('preset', 'superfast')
  
  
  
      //set target codec
  
      .withVideoCodec('libx264')
  
  
  
      //set audio bitrate
  
      .withAudioBitrate('128k')
  
  
  
      //set audio codec
  
      //.withAudioCodec('libfaac')
  
  
  
      //set number of audio channels
  
      .withAudioChannels(2)
  
  
  
      .toFormat('ismv')
  
  
  
      .on('error', function(err, stdout, stderr) {
  
          console.log("ffmpeg stdout:\n" + stdout);
  
          console.log("ffmpeg stderr:\n" + stderr);
  
      })
  
  
  
      .on('end', function() {
  
          console.log('file has been converted successfully');
  
      })
  
  
  
      .on('error', function(err){
  
          console.log('an error happened: ' + err.message);
  
      })
  
  
  
      .writeToStream(outStream, { end: true}); // <-- Where I would like my stream to go
  
      //save to file
  
      //.saveToFile('C:/Users/Jay/Documents/movie/liveStream.ismv');