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• Losing Audio When Converting VOB to MPEG-2 using FFMPEG [closed]

  29 avril 2015, par Nathan

  I’m using FFMPEG to convert VOB files to MPEG2 using

  ffmpeg -i file.vob -c copy
out.mpg

  .

  It’s converting the video fine, but the audio doesn’t play on the resulting
  files. I get the

  [mpeg @ 0x118afc0] max_analyze_duration 5000000 reached at 5005000

  error, but setting -analyzeduration to 9999999 or higher doesn’t get
  rid of the error.

  I think it’s reading the stream correctly :

  Metadata :
    encoder : Lavf53.32.100
    Stream #0:0 : Video : mpeg2video, yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=2-31,
                        6124 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
    Stream #0:1 : Audio : ac3, 48000 Hz, stereo, 256 kb/s`
  

  Here’s info on my install

  ffmpeg version 0.10.6 Copyright (c) 2000-2012 the FFmpeg developers
  built on Dec 11 2012 23:58:43 with gcc 4.4.6 20110731 (Red Hat 4.4.6-3)
  configuration : —prefix=/usr —bindir=/usr/bin —datadir=/usr/share/ffmpeg
  
  — incdir=/usr/include/ffmpeg —libdir=/usr/lib64 —mandir=/usr/share/man
  
  — arch=x86_64 —extra-cflags=’-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
  
   fexceptions -fstack-protector —param=ssp-buffer-size=4 -m64 -mtune=generic’
  
  — enable-bzlib —disable-crystalhd —enable-gnutls —enable-libass
  
  — enable-libcdio —enable-libcelt —enable-libdc1394 —disable-indev=jack
  
  — enable-libfreetype —enable-libgsm —enable-libmp3lame —enable-openal
  
  — enable-libopenjpeg —enable-libpulse —enable-librtmp —enable-libschroedinger
  
  — enable-libspeex —enable-libtheora —enable-libvorbis —enable-libv4l2
  
  — enable-libx264 —enable-libxvid —enable-x11grab —enable-avfilter
  
  — enable-postproc —enable-pthreads —disable-static —enable-shared
  
  — enable-gpl —disable-debug —disable-stripping —shlibdir=/usr/lib64
  
  — enable-runtime-cpudetect
  libavutil      51. 35.100 / 51. 35.100
  libavcodec     53. 61.100 / 53. 61.100
  libavformat    53. 32.100 / 53. 32.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 61.100 /  2. 61.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  6.100 /  0.  6.100
  libpostproc    52.  0.100 / 52.  0.100
  

• Anomalie #4354 (En cours) : Problème de recherche REGEX, mauvais joker

  19 juin 2019, par Jimmy Laporte

  Bonjour,

  J’ai remarqué un problème dans la recherche REGEX. Les caractères accentués sont remplacés par un joker . dans le pattern pour la requête mysql. Hors cela ne fonctionne pas, si j’ai le titre d’un article qui est "Fêtes et Cérémonies" par exemple et que je recherche (dans le backend ou le front peut importe) "Fêtes et Cérémonies", l’article ne sort jamais. La requête REGEX envoyée à mysql est "F.tes C.r.monies|F.tes|C.r.monies" hors, tout comme avec un preg_match en php, "F.tes" ne matchera jamais "Fêtes" le pattern dois être "F.*tes".

  Pour résoudre le problème j’ai du modifier la ligne 202 dans le fichier ecrire/inc/rechercher.php

  <span class="CodeRay"><span class="local-variable">$q_t</span> = <span class="predefined">str_replace</span>(<span class="local-variable">$char</span>, <span class="local-variable">$is_preg</span> ? <span class="string"><span class="delimiter">"</span><span class="content">.</span><span class="delimiter">"</span></span> : <span class="string"><span class="delimiter">"</span><span class="content">_</span><span class="delimiter">"</span></span>, <span class="local-variable">$q_t</span>);
  </span>
  Télécharger

  
  par
  

  <span class="CodeRay"><span class="local-variable">$q_t</span> = <span class="predefined">str_replace</span>(<span class="local-variable">$char</span>, <span class="local-variable">$is_preg</span> ? <span class="string"><span class="delimiter">"</span><span class="content">.*</span><span class="delimiter">"</span></span> : <span class="string"><span class="delimiter">"</span><span class="content">_</span><span class="delimiter">"</span></span>, <span class="local-variable">$q_t</span>);
  </span>
  Télécharger

• Convert ogg byte array to wav byte array Python

  2 février 2023, par Ramish Rasool

  I want to convert ogg byte array/bytes with Opus codec to wav byte array/bytes without saving to disk. I have downloaded audio from telegram api and it is in byte array format with .ogg extension. I do not want to save it to filesystem to eliminate filesystem io latencey.

  


  Currently what I am doing is after saving the audio file in .ogg format using code the below code using telegram api for reference https://docs.python-telegram-bot.org/en/stable/telegram.file.html#telegram.File.download_to_drive

  


  # listen for audio messages
async def audio(update, context):
    newFile = await context.bot.get_file(update.message.voice.file_id)
    await newFile.download_to_drive(output_path)


  


  I am using the code

  


  subprocess.call(["ffmpeg", "-i", output_path, output_path.replace(".ogg", ".wav"), '-y'], stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL)


  


  to convert ogg file to wav file. But this is not what I want.

  


  I want the code

  


  async def audio(update, context):
    newFile = await context.bot.get_file(update.message.voice.file_id)
    byte_array = await newFile.download_as_bytearray()


  


  to get byte_array and now I want this byte_array to be converted to wav without saving to disk and without using ffmpeg. Let me know in comments if something is unclear. Thanks !

  


  Note : I have setted up a telegram bot at the backend which listens for audios sent to private chat which I do manually for testing purposes.