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• Capture ffmpeg's metadata output in powershell

  17 janvier 2021, par xdhmoore

  I'm trying to capture the output of ffmpeg in PowerShell(tm) to get some metadata on some ogg & mp3 files. But when I do :

  



  ffmpeg -i file.ogg 2>&1 | sls GENRE


  



  The output includes a bunch of lines without my matching string, "GENRE" :

  



        album_artist    : Post Human Era
      ARTIST          : Post Human Era
      COMMENT         : Visit http://posthumanera.bandcamp.com
      DATE            : 2013
      GENRE           : Music
      TITLE           : Supplies
      track           : 1
At least one output file must be specified


  



  I am guessing something is different in the encoding. ffmpeg's output is colored, so maybe there are color control characters in the output that are breaking things ? Or, maybe ffmpeg's output isn't playing nicely with powershell's default UTF-16 ? I can't figure out if there is another way to redirect stderr and remove the color characters or change the encoding of stderr.

  



  EDIT :
Strangely, I also get indeterminate output. Sometimes the output is as shown above. Sometimes with precisely the same command the output is :

  



        GENRE           :


  



  

  



  Which makes slightly more sense, but is still missing the part of the line I care about ('Music').

  



  Somewhere powershell is interpreting something as newlines that is not newlines.

  


• ffmpeg errors in the daemon

  3 octobre 2020, par smoto_shei

  I created a shell script to compress a video using ffmpeg(4.3.1).

  


  ffmpeg -y -i \
 '/var/www/System/Backend/Outputs/TempSaveMovie/200703_4_short_5fr_p2(100_20)_r(50_20).mp4' \
 -vcodec h264 -an \
 '/var/www/System/Backend/Outputs/MovieOutputs/200703_4_short_5fr_p2(100_20)_r(50_20).mp4'



  


  If you run this code from the console, it will run without problems.
In fact, we're using the python subscript.call() to execute it. It works fine too.

  


  cmd = 'sh /var/www/System/Backend/cv2toffmpeg.sh'
subprocess.call(cmd, shell=True)


  


  Secondly, if I run it from a daemonized python program, I'll get an error. I get the following error.
You'll get an error like this

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './Outputs/TempSaveMovie/200703_4_short_5fr_p2(100_20)_r(50_20).mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.35.100
  Duration: 00:00:06.15, start: 0.000000, bitrate: 10246 kb/s
    Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 10244 kb/s, 13 fps, 13 tbr, 13312 tbn, 13 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (h264_nvenc))
Press [q] to stop, [?] for help
[mpeg4 @ 0x55cec17c5480] header damaged
[mpeg4 @ 0x55cec17c6840] header damaged
[mpeg4 @ 0x55cec1855f80] header damaged
[mpeg4 @ 0x55cec1866e00] header damaged
Output #0, mp4, to './Outputs/MovieOutputs/200703_4_short_5fr_p2(100_20)_r(50_20).mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.45.100
    Stream #0:0(und): Video: h264 (h264_nvenc) (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 2000 kb/s, 13 fps, 13312 tbn, 13 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.91.100 h264_nvenc
    Side data:
      cpb: bitrate max/min/avg: 0/0/2000000 buffer size: 4000000 vbv_delay: N/A
Error while decoding stream #0:0: Invalid data found when processing input
[mpeg4 @ 0x55cec17c8780] header damaged
Error while decoding stream #0:0: Invalid data found when processing input
[mpeg4 @ 0x55cec17c5480] header damaged


  


  I think the problem is when you run it from a daemonized process. There seems to be a similar problem in the past.
Ffmpeg does not properly convert videos when run as daemon
I would like to ask for your help to solve this problem. Thank you for your help from Japan.

  


• Anomalie #3014 : Chaines de langue de "Forums" utilisées dans la "dist"

  24 décembre 2017, par b b

  Pour info, voici les occurrences de chaînes de langue de forum dans la dist à ce jour :

  grep -nHIirF —exclude=*.svn-base — :forum : .
  ./404.html:36 :            [(#ENVfond_erreur|==forum|oui)
  
  <:forum:aucun_message_forum :>
  
  ]
  
  ./article.html:56 :            [
  <:forum:form_pet_message_commentaire :>
  ./inclure/forum.html:17 :                [(#CONFIGforums_titre| !=non|oui)#COMPTEUR_BOUCLE.
  
  ./inclure/forum.html:42 :                        [(#CONFIGforums_titre| !=non|oui)#COMPTEUR_BOUCLE.
  
  ./forum.html:11 :    
  
  ./forum.html:25 :
  
  <:accueil_site :> &gt ; ... &gt ; <:forum:forum :> #ID_FORUM
  
  ./forum.html:28 :                [
  (#TITRE|sinon<:forum:forum :> #ID_FORUM)
  ]
  
  ./forum.html:38 :
  <:forum:forum_avez_selectionne :> #TITRE
  
  ./forum.html:41 :            [
  <:forum:form_pet_message_commentaire :>
  ./breve.html:43 :            [
  <:forum:form_pet_message_commentaire :>