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• FFmpeg : Can't write metadata to a .ts file

  29 octobre 2019, par John Bergqvist

  I have an input that i’m muxing into a .ts file, however despite what FFmpeg’s wiki says (that it supports the title and language metadata keys) for MPEG transport streams), the title isn’t propagating to the video & audio :

  ffmpeg -i "source" \
  
  -map 0:0 -metadata:s:v:0 title="VIDEO_TITLE" \
  
  -map 0:1 -metadata:s:a:0 language="eng" -metadata:s:a:0 title="AUDIO_TITLE" \
  
  -c copy "output.ts"

  The language is, but not the title.

  This is what I get when actually muxing :

  Output #0, mpegts, to 'output.ts':
  
    Metadata:
  
      encoder         : Lavf58.20.100
  
      Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 25 tbr, 90k tbn, 90k tbc (default)
  
      Metadata:
  
        variant_bitrate : 0
  
        title           : VIDEO_TITLE
  
      Stream #0:1(zxx): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp
  
      Metadata:
  
        variant_bitrate : 0
  
        comment         : AUDIO_TITLE
  
        title           : AUDIO_TITLE

  However upon completion, it seems the title isn’t there. It doesn’t show up in mediainfo (or VLC for that matter) either :

  Input #0, mpegts, from 'output.ts':
  
    Duration: 01:00:00.00, start: 1.440000, bitrate: 5120 kb/s
  
    Program 1
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x101](zxx): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 68 kb/s

  If I was to run the same command but give the file an mp4 extension, the metadata is muxed in as expected, but not for a TS file - am I doing something wrong ?

• mpegts demuxer : store PMT values of DVB teletext to extradata

  24 janvier 2014, par Serhii Marchuk

  mpegts demuxer : store PMT values of DVB teletext to extradata
  * Using extradata by TS demuxer to store values from PMT
  
  * Support of multiple languages in one DVB teletext stream :
  
    comma separated language codes in metadata "language" field
  Reviewed-by : Marton Balint <cus@passwd.hu>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/mpegts.c

• YouTube - MP4 to MP3 messes up

  23 novembre 2019, par theeSpark

  It’s supposed to download all the videos in the playlist and convert them to mp3. But all this does is make the mp4’s and 1 empty mp3 with a number higher than the max mp4. My newbie brain doesn’t know how to fix this...

  var ytpl = require('ytpl');
  
  var fs = require('fs-extra');
  
  var path = require('path');
  
  var ffmpeg = require('fluent-ffmpeg');
  
  var binaries = require('ffmpeg-static');
  
  var ytdl = require('ytdl-core');
  
  
  
  var output_dir = path.join(__dirname+"/dl");
  
  
  
  ytpl("PL8n8S4mVUWvprlN2dCAMoIo6h47ZwR_gn", (err, pl) => {
  
      if(err) throw err;
  
  
  
      let c = 0;
  
  
  
      pl.items.forEach((i) => {
  
          ytdl(i.url_simple+"", { filter: 'audioonly' }).pipe(fs.createWriteStream(output_dir+"/"+c+".mp4")).on('finish', () => {
  
              console.log("Finished MP4 DL, starting conversion...");
  
              ffmpeg(output_dir+"/"+c+".mp4")
  
                  .setFfmpegPath(binaries.path)
  
                  .format('mp3')
  
                  .audioBitrate(320)
  
                  .output(fs.createWriteStream(output_dir+"/"+c+".mp3"))
  
                  .on('end', () => {
  
                      console.log("Finished MP3 Convert...");
  
                  })
  
                  .run();
  
          });
  
          c++;
  
      });
  
  
  
  });