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• How do I debug why avconv is stalling ?

  9 juillet 2015, par Ecommerce Consultant

  I’m converting .mov files to .mpg files using avconv. The command being run by my php application is as follows :

  avconv -y -i ’$finalvideo’ -target ntsc-dvd -aspect 4:3 ’$mpgvideo’ > $logs

  I’m able to convert small .mov files to .mpg without any problems. However, I’m unable to convert videos that are over ten or fifteen minutes long. The log file is completely empty. When I run the command directly the frame stops somewhere around 34000 no matter which video I pick.

  The cpu shows 97% usage on this process, however, nothing is happening.

  OS Ubuntu 10 

  How can I gather more information about this stalled process ?

  Here’s the frozen output

  avconv version 0.7, Copyright (c) 2000-2011 the Libav developers
  
    built on Nov  3 2011 13:39:09 with gcc 4.3.3
  
  
  
  Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 23.98 (24000/1001)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/sites/default/files/compiled_videos/573-stream.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 512
  
      compatible_brands: qt  
  
      creation_time   : 1970-01-01 00:00:00
  
      encoder         : Lavf53.0.3
  
    Duration: 00:18:53.49, start: 0.000000, bitrate: 1430 kb/s
  
      Stream #0.0(eng): Video: h264 (Main), yuv420p, 854x480, 1387 kb/s, 25.60 fps, 23.98 tbr, 90k tbn, 180k tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 126 kb/s
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
  [buffer @ 0x9d88820] w:854 h:480 pixfmt:yuv420p
  
  [scale @ 0x9d88b60] w:854 h:480 fmt:yuv420p -> w:720 h:480 fmt:yuv420p flags:0x4
  
  Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt'
  
  Output #0, dvd, to '/var/www/sites/default/files/compiled_videos/573.mpg':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 512
  
      compatible_brands: qt  
  
      creation_time   : 1970-01-01 00:00:00
  
      encoder         : Lavf53.10.0
  
      Stream #0.0(eng): Video: mpeg2video, yuv420p, 720x480 [PAR 8:9 DAR 4:3], q=2-31, 6000 kb/s, 90k tbn, 29.97 tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
      Stream #0.1(eng): Audio: ac3, 48000 Hz, stereo, flt, 448 kb/s
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
  Stream mapping:
  
    Stream #0.0 -> #0.0 (h264 -> mpeg2video)
  
    Stream #0.1 -> #0.1 (aac -> ac3)
  
  Press ctrl-c to stop encoding
  
  [mpeg2video @ 0x9d8bf20] rc buffer underflow
  
  Input stream #0.1 frame changed from rate:48000 fmt:s16 ch:2 to rate:48000 fmt:flt ch:2
  
  frame=33910 fps= 91 q=2.0 size=  151922kB time=336.58 bitrate=3697.7kbits/s dup=5475 drop=530    

  Oh interesting. I used -loglevel debug -debug. I was seeing this information

  stream #0:
  
    keyframe=0
  
    duration=0.000
  
    dts=1133.449  pts=1133.533
  
    size=103
  
  *** 1 dup!
  
  stream #0:
  
    keyframe=0
  
    duration=0.000
  
    dts=1133.449  pts=1133.449
  
    size=104

  Until I finally received this message

  *** drop!

  I have posted my bug with libav
  http://bugzilla.libav.org/show_bug.cgi?id=67

  thanks for your help.

• Anomalie #2348 (Nouveau) : plus de flux rss dans l’espace public

  23 septembre 2011, par gerard henry

  depuis la version 2.1, certains flux sont récupérés avec comme date 1 jan 1970. Par exemple : http://arxiv.org/rss/math A cause de cette date, les flux n’apparaissent plus dans l’espace public. Si on regarde le source du XML, une difference est que la date est affcihee par ArXiv comme : Fri, 23 Sep (...)

• Revision 32594 : plugins en minuscules, et alias pour les noms de sites

  1er novembre 2009, par fil@… — Log

  plugins en minuscules, et alias pour les noms de sites