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• ffmpeg error At least one output file must be specified

  29 novembre 2022, par cedricx

  my code :
ffmpeg -i "C :\Users\xxxxxxx\Desktop\aaaaaa\a.mp4" -frames 1 -vf "drawtext="fontsize=60:fontcolor=yellow select=not(mod(n,18)),scale=200:100,tile=15x48" "C :\Users\xxxxxxx\Desktop\aaaaaa\a.png"

  


  i got this error :
At least one output file must be specified

  


  where is the problem ?

  


  command is get error and i need fix

  


• avformat/file : dup file descriptor for pipe

  14 décembre 2022, par Zhao Zhili

  avformat/file : dup file descriptor for pipe
  Signed-off-by : Zhao Zhili <zhilizhao@tencent.com>
  

  • [DH] libavformat/file.c

• Piping multiple chunked *.ts file streams from m3u8 to one .ts file using Node.js

  7 janvier 2017, par user2631534

  I im creating on-the-fly *.ts files (and updating m3u8 file with last 6 created *.ts files) and would like to stream this file to vlc player using new filename as single file.

  For example...i have on-the-fly 1_.m3u8 file :

    #EXTM3U
  
    #EXT-X-VERSION:3
  
    #EXT-X-TARGETDURATION:14
  
    #EXT-X-MEDIA-SEQUENCE:1
  
    #EXTINF:13.720000,1_1.ts
  
    #EXTINF:4.560000,1_2.ts
  
    #EXTINF:12.760000, 1_3.ts
  
    #EXTINF:9.520000,1_4.ts
  
    #EXTINF:8.560000,1_5.ts
  
    #EXTINF:4.280000,1_6.ts
  
    #EXT-X-ENDLIST

  And would like when i call http://myserverip:port/1.ts in chrome i get to download one file 1.ts that is reading files 1_1.ts and when reading is at end of this file then go to next file 1_2.ts, and 1_3.ts, and 1_4.ts, and 1_5.ts and 1_6.ts and then reading from beginning 1_1.ts, and 1_2ts and so on.

  I need this so that i can stream one h.264 video without interrupting and without stopping when reading next ts file from my server. I use ffmpeg to generate ts chunk small files and overwrite when max 6ts are generated so that i always get from 1_1.ts to 1_6.ts so that my hdd is not full in short time.

  I try using this node js code that run event when m3u8 file is changed and get last ts file name so that i pipe it to response...but problem is when 1_1.ts read file is end it stops stream...

  stream.get('/stream', function(req, res) {
  
  /* STREAM - header */
  
  res.writeHead(200, {
  
    'Content-Type': 'video/H264'
  
  });
  
  var fs = require('fs');
  
  
  
  var Watcher = require('hls-watcher');
  
  var w1 = new Watcher('/tmp/streams/1_.m3u8');
  
  w1.listenFile();
  
  
  
  w1.on("change", function(data){
  
      //do things with ts files stored on data.
  
  
  
      fs.createReadStream('/tmp/streams/'+data[0]).pipe(res);
  
      console.log(data);
  
  });
  
  });