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• Using ffmpeg with Flash Media Server and HDS

  20 avril 2012, par Jonathan

  I want to use ffmpeg to encode and publish a live stream to Flash Media Server. In order to support iOS devices, I need to implement HTTP Live Streaming as well. The video needs to be in H.264 format and the audio should be AAC. I don't have much experience working with ffmpeg, and I'm having a hard time getting this to work. This is the command that I've tried (and some variations as well) :

  ffmpeg.exe -threads 15 -f dshow -i video="USB2.0 UVC WebCam":audio="Microphone (Realtek High Defini" \
  
        -map_channel 0.1.1 -r 24 -acodec libvo_aacenc -ar 22050 -ab 128k -vcodec libx264 \
  
        -s vga -vb 100k -f flv "rtmp:///livepkgr/livestream1?adbe-live-event=liveevent" \
  
        -r 24 -acodec libvo_aacenc -ar 22050 -ab 128k -vcodec libx264 -s qvga -vb 200k \
  
        -f flv "rtmp:///livepkgr/livestream2?adbe-live-event=liveevent" \
  
        -r 24 -acodec libvo_aacenc -ar 22050 -ab 128k -vcodec libx264 -s vga -vb 350k 
  
        -f flv "rtmp:///livepkgr/livestream3?adbe-live-event=liveevent"

  When I run this, it appears to connect to FMS, but then I get a lot of error messages about dropped frames - I'm not sure if ANY frames get encoded successfully. My CPU usage is very high as well. I get a 404 error from FMS when I enter the URL of the *.m3u8 file for one of the individual streams (the main livestream.m3u8 file is accessible though). I have also tried outputting to a file instead of FMS, with no success. All I get is some very garbled sound and no video.

  Any suggestions for what options/commands I should use to get this working ? Is anyone using ffmpeg with FMS to do HTTP Dynamic Streaming / HLS with MP4 video ? I've been struggling to get HDS/HLS working for some time now, and any help would be much appreciated ! It shouldn't make a difference, but I'm using FMS on Amazon EC2 with their AMI image.

  Thanks !

• Using ffmpeg to watermark a folder of videos

  25 août 2018, par user5947524

  I am using the code below to watermark individual videos one-by-one in a folder :

  ffprobe -v quiet -show_entries stream=width,height -of default=noprint_wrappers=1 dave.mp4
  
  ffmpeg -i logo.png -y -v quiet -vf scale=width*0.15:-1 scaled.png
  
  ffmpeg -i dave.mp4 -i scaled.png -filter_complex "overlay=10:main_h-overlay_h-10" dave2.mp4

  The first line gets the width and the height of a video, second line scales the watermark for that video, third line creates a new video watermarked.

  How can I make run for a full folder of 1000 videos ?

  I tried the code below but it corrupted the videos :

  for %%a in ("C:\Users\Work\Desktop\test2\*.mp4") do (
  
   ffprobe -v quiet -show_entries stream=width,height -of default=noprint_wrappers=1 "%%a" 
  
   ffmpeg -i logo.png -y -v quiet -vf scale=width*0.15:-1 scaled.png 
  
   ffmpeg -i "%%a" -i scaled.png -filter_complex "overlay=10:main_h-overlay_h-10" "C:\Users\Work\Desktop\test2\%%~na.mp4"
  
  )

  The error I get is :

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000014545aaaa00] stream 0, offset 0x18039: partial file
  
  [aac @ 0000014545b708c0] Input buffer exhausted before END element found
  
  Error while decoding stream #0:1: Invalid data found when processing input
  
  C:\Users\Work\Desktop\test2\dave.mp4: Invalid data found when processing input

• Auto delete .ts and .m3u8 files once client receives all .ts files

  11 mars 2019, par Abhishek Mehandiratta

  So I created an express server that gets an mp3 file (which is stored locally right now, but will be taken from mongo db later) and uses ffmpeg to make .m3u8 and .ts files. The files are successfully sent to the client and there are no errors while playing it on the client. I used hls.js to play these files in Chrome. But the server still has those files stored locally. Is there any way the server can know when to delete these files that it stored locally ? There are a lot of files generated by ffmpeg so I can’t just let them stay there forever.

  I used the ffmpeg part of code from hls-server github repo.

  my server file

  index.js

  // just used to run ffmpeg for conversion
  
  var command = ffmpeg('inp.mp3')
  
    .on('start', function (commandLine) {
  
      console.log('command', commandLine);
  
    }).addOptions([
  
      '-c:a aac',
  
      '-b:a 64k',
  
      '-vn',
  
      '-hls_list_size 0',
  
      '-segment_time 10',
  
    ]).output('files\\output.m3u8');
  
  
  
  var express = require('express');
  
  var app = express();
  
  // express middleware to serve individual .ts and .m3u8 files when requested
  
  app.use(express.static('./files/'));
  
  
  
  app.get('/', function (req, res) {
  
    command.on('end', function () {
  
      console.log('done');
  
      res.write(`
  
      <code class="echappe-js">&lt;script src=&quot;https://cdn.jsdelivr.net/hls.js/latest/hls.min.js&quot;&gt;&lt;/script&gt;
      
  &lt;script&gt;<br />
  
        function onLevelLoaded (event, data) {<br />
  
          var level_duration = data.details.totalduration;<br />
  
          console.log(level_duration, data);<br />
  
        }<br />
  
        if(Hls.isSupported()) {<br />
  
          var audio = new Audio();<br />
  
          var hls = new Hls();<br />
  
          // requesting files from here<br />
  
          hls.loadSource('http://localhost:8000/output.m3u8');<br />
  
          hls.attachMedia(audio);<br />
  
          hls.on(Hls.Events.LEVEL_LOADED, onLevelLoaded);<br />
  
          hls.on(Hls.Events.FRAG_BUFFERED, (e, d) =&gt; {<br />
  
            console.log(e, d);<br />
  
          });<br />
  
        }<br />
  
      &lt;/script&gt;
      
  `) ;
  
      res.end() ;
  
    }).run() ;
  
  }) ;
  app.listen(8000) ;