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• How do I use ffmpeg to deliver the video

  19 juin 2014, par user3750991

  Our destination :

  We want to install camera on our device of arm architecture with capture real-time video and send them to ffserver, then we can watch this video from h ttp ://172.16.51.29:8090/stat.html on the other computer in the same time.

  Device IP address : 172.16.51.29
  computer IP address : 172.16.51.26

  1 I start the server on device

  ffserver -f /etc/ffserver.conf

  2 Camera start to capture video on device

  ffmpeg -s 320x240 -f video4linux2 -i /dev/video0 h ttp ://127.0.0.1:8090/cam1.ffm

  3 I got the messages

  Error while opening encoder for output stream #0.0 - maybe incorrect
  parameters such as bit_rate, rate, width or height

  4 Test

  ffmpeg -s 320x240 -f video4linux2 -i /dev/video0 cam1.asf

  Command above is perfect to produce video named cam1.asf

  5 Fix incorrect parameters such as bit_rate, rate, width or height

  ffmpeg -s 320x240 -f video4linux2 -i /dev/video0 -b 100k h ttp ://127.0.0.1:8090/cam1.ffm

  But use the command above produce the message presented below

  Input #0, video4linux2, from ’/dev/video0’ :
  Duration : N/A, start : 24300.069612, bitrate : 36864 kb/s
  Stream #0.0 : Video : rawvideo, yuyv422, 320x240, 36864 kb/s, 30 tbr, 1000k tbn, 30 tbc
  Sat Jan 1 07:09:07 2000 127.0.0.1 - - [GET] "/cam1.ffm HTTP/1.1" 200 4149
  [buffer @ 0x2f1a0] w:320 h:240 pixfmt:yuyv422
  [avsink @ 0x2f7e0] auto-inserting filter ’auto-inserted scaler 0’ between the filter ’src’ and the filter ’out’
  [scale @ 0x2ea60] w:320 h:240 fmt:yuyv422 -> w:320 h:240 fmt:yuv420p flags:0x4
  Sat Jan 1 07:09:07 2000 127.0.0.1 - - [POST] "/cam1.ffm HTTP/1.1" 200 0
  Segmentation fault

  What should I do to fix this issue ? Thanks.

• rtmpdump check status by command line

  2 mai 2014, par David

  I tried doing rtmpdump -r "rtmp-raw=rtmpe ://watch.playfooty.tv/live playpath=nba1569 swfUrl=http://www.playfooty.tv/play/player/player.swf live=1 pageUrl=http://www.playfooty.tv/"
  But the output it´s like offline always

  RTMPDump v2.2e
  
  (c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
  
  DEBUG: Parsing...
  
  WARNING: Unknown protocol!
  
  
  
  DEBUG: Parsed host : watch.playfooty.tv
  
  DEBUG: Parsed app : live playpath=nba1569 swfUrl=http:/
  
  DEBUG: Protocol : RTMP
  
  DEBUG: Hostname : watch.playfooty.tv
  
  DEBUG: Port : 1935
  
  DEBUG: Playpath : www.playfooty.tv/play/player/player.swf live=1 pageUrl=http://www.playfooty.tv/
  
  DEBUG: tcUrl : rtmp://watch.playfooty.tv:1935/live playpath=nba1569 swfUrl=http:/
  
  DEBUG: app : live playpath=nba1569 swfUrl=http:/
  
  DEBUG: live : no
  
  DEBUG: timeout : 30 sec

  I tried a lot of links of a list and seems offline with this command, but When I play it in a software it worked.

  Does anyone have an idea how to test if this kind of links are alive or die ?

  Thanks !

• Node.js Stream Mp3 to http without having to save file

  21 août 2016, par user2758113

  I am trying to stream just audio from a youtube link straight to http with node.js.

  My code looks like this, I am using express 4.0.

  var express = require('express');
  
  var router = express.Router();
  
  var ytdl = require('ytdl');
  
  var ffmpeg = require('fluent-ffmpeg');
  
  var fs = require('fs');
  
  
  
  router.get('/', function(req, res) {
  
  
  
    var url = 'https://www.youtube.com/watch?v=GgcHlZsOgQo';
  
    var video = ytdl(url)
  
  
  
    res.set({
  
        "Content-Type": "audio/mpeg"
  
    })
  
  
  
    new ffmpeg({source: video})
  
        .toFormat('mp3')
  
        .writeToStream(res, function(data, err) {
  
          if (err) console.log(err)
  
        })
  
  
  
  });
  
  
  
  module.exports = router;

  Now, I’m able to stream the video’s audio to the response if I save the file then pipe it to the response, but I’d rather try to figure out some way to go from downloading to ffmpeg to response.

  Not sure if this is possible. The main goal is to keep it as light weight as possible, and not have to read from files.

  I’ve seen this code which is essentially what I’d like to do minus the saving to a file part.