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• python call of ffmpeg misses target file parameter

  2 décembre 2016, par Fred

  I’m writing a python GUI for ffmpeg. When calling ffmpeg via subprocess it runs fine as long as the command is like

  subprocess.Popen([ffmpeg_converter,
  
          '-i',file,
  
          target_file
  
          ])

  But when I do the same call with ffmpeg arguments it fails with
  "At least one output file must be specified" :

  option_string = '-q:a 4'
  
  subprocess.Popen([ffmpeg_converter,
  
          '-i',file,
  
          option_string,
  
          target_file
  
          ])

  It even recognizes the options but does not see the target file. I even replaced the actual target file with someting simple like "test.mp3" but still the same error. Any ideas ? (I’m on windows with python 3.3.)

  The complete console output is :

      ffmpeg version N-57781-g0610d6e Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Nov  1 2013 18:01:35 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
  ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 49.100 / 52. 49.100
  
    libavcodec     55. 40.101 / 55. 40.101
  
    libavformat    55. 20.105 / 55. 20.105
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.100 /  3. 90.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Trailing options were found on the commandline.
  
  Input #0, flac, from 'c:\script\python\testdata\source\01. Es geht los.flac':
  
    Metadata:
  
      ARTIST          : Olivia Trummer Trio
  
      TITLE           : Es geht los
  
      ALBUM           : Westwind
  
      DATE            : 2008
  
      track           : 01
  
      GENRE           : Jazz
  
      COMMENT         : EAC FLAC -8
  
    Duration: 00:06:27.25, bitrate: 834 kb/s
  
      Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
  
  At least one output file must be specified

• ffmepg suddently stopped working

  30 octobre 2013, par jdartland

  Hi Im using ffmpeg jwplayer to handle my video uploads. It worked just fine untill I added a video upload to a new model. My video files gets uploaded to the database but i can't play them in my jwplayer. I also noticed that ffmpeg converts files to avi eaven though I've specifyed it in both of my models to convert files into flv.

  Here is my javascrip "error" :

  Error loading player:
  
  No playable sources found.

  My models, tabels and vews shuld work cus I haven't changed anything in my old working post module.

  Here is whats happening in the upload :

  Started PATCH "/posts/dsdsdsdsd" for 127.0.0.1 at 2013-10-30 15:37:53 +0100
  
  Processing by PostsController#update as HTML
  
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"4Xp=", "post"=>{"title"=>"dsdsdsdsd", "content"=>"sdsdsdsdsd", "photo_delete"=>"0", "video_delete"=>"0", "video"=>#, @original_filename="Drossel_10bar__Pressure_inner_wall.avi", @content_type="video/x-msvideo", @headers="Content-Disposition: form-data; name=\"post[video]\"; filename=\"Drossel_10bar__Pressure_inner_wall.avi\"\r\nContent-Type: video/x-msvideo\r\n">}, "commit"=>"Update Post", "id"=>"dsdsdsdsd"}
  
    Admin Load (0.9ms)  SELECT "admins".* FROM "admins" WHERE "admins"."id" = 1 ORDER BY "admins"."id" ASC LIMIT 1
  
    Post Load (0.5ms)  SELECT "posts".* FROM "posts" WHERE "posts"."permalink" = 'dsdsdsdsd' ORDER BY created_at desc LIMIT 1
  
     (0.2ms)  BEGIN
  
  [paperclip] [ffmpeg] ffmpeg -i "/tmp/Drossel_10bar__Pressure_inner_wall20131030-6965-14cqqt7.avi" 2>&1
  
  [paperclip] [ffmpeg] Command Success
  
  [paperclip] [ffmpeg] Making...
  
  [paperclip] [ffmpeg] Building Destination File: 'Drossel_10bar__Pressure_inner_wall20131030-6965-14cqqt7' + 'flv'
  
  [paperclip] [ffmpeg] Destination File Built
  
  [paperclip] [ffmpeg] Adding Geometry
  
  [paperclip] [ffmpeg] Extracting Target Dimensions
  
  [paperclip] [ffmpeg] Target Size is Available
  
  [paperclip] [ffmpeg] Keeping Aspect Ratio
  
  [paperclip] [ffmpeg] Resize
  
  [paperclip] [ffmpeg] Convert Options: 400x234
  
  [paperclip] [ffmpeg] Adding Format
  
  [paperclip] [ffmpeg] Adding Source
  
  [paperclip] [ffmpeg] Building Parameters
  
  [paperclip] [ffmpeg] -i :source -s 400x234 -y :dest
  
  Command :: ffmpeg -i '/tmp/Drossel_10bar__Pressure_inner_wall20131030-6965-14cqqt7.avi' -s 400x234 -y '/tmp/Drossel_10bar__Pressure_inner_wall20131030-6965-14cqqt720131030-6965-1fv54qn.flv'
  
  ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  
    built on Apr  2 2013 17:02:36 with gcc 4.6.3
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  Input #0, avi, from '/tmp/Drossel_10bar__Pressure_inner_wall20131030-6965-14cqqt7.avi':
  
    Metadata:
  
      encoder         : Lavf52.64.2
  
    Duration: 00:00:00.00, start: 0.000000, bitrate: -2147483 kb/s
  
      Stream #0.0: Video: mjpeg, yuvj422p, 1588x936, 15 tbr, 15 tbn, 15 tbc
  
  Incompatible pixel format 'yuvj422p' for codec 'flv', auto-selecting format 'yuv420p'
  
  [buffer @ 0xdcd280] w:1588 h:936 pixfmt:yuvj422p
  
  [scale @ 0xdcd7c0] w:1588 h:936 fmt:yuvj422p -> w:400 h:234 fmt:yuv420p flags:0x4
  
  Output #0, flv, to '/tmp/Drossel_10bar__Pressure_inner_wall20131030-6965-14cqqt720131030-6965-1fv54qn.flv':
  
    Metadata:
  
      encoder         : Lavf53.21.1
  
      Stream #0.0: Video: flv, yuv420p, 400x234, q=2-31, 200 kb/s, 1k tbn, 15 tbc
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Press ctrl-c to stop encoding
  
  frame=  451 fps=118 q=2.2 Lsize=     962kB time=30.07 bitrate= 262.1kbits/s    
  
  video:955kB audio:0kB global headers:0kB muxing overhead 0.759673%
  
  [paperclip] [qtfaststart] :source :dest
  
  Command :: qt-faststart '/tmp/Drossel_10bar__Pressure_inner_wall20131030-6965-14cqqt720131030-6965-1fv54qn.flv' '/tmp/Drossel_10bar__Pressure_inner_wall20131030-6965-14cqqt720131030-6965-1fv54qn20131030-6965-1a8cksd.flv'
  
    Post Exists (0.7ms)  SELECT 1 AS one FROM "posts" WHERE ("posts"."title" = 'dsdsdsdsd' AND "posts"."id" != 37) LIMIT 1
  
    SQL (0.7ms)  UPDATE "posts" SET "video_file_name" = $1, "video_content_type" = $2, "video_file_size" = $3, "video_updated_at" = $4, "updated_at" = $5 WHERE "posts"."id" = 37  [["video_file_name", "Drossel_10bar__Pressure_inner_wall.avi"], ["video_content_type", "video/x-msvideo"], ["video_file_size", 41766866], ["video_updated_at", Wed, 30 Oct 2013 14:37:53 UTC +00:00], ["updated_at", Wed, 30 Oct 2013 14:37:57 UTC +00:00]]
  
     (102.0ms)  COMMIT
  
  Redirected to http://0.0.0.0:3000/posts/dsdsdsdsd
  
  Completed 302 Found in 4078ms (ActiveRecord: 105.0ms)
  
  
  
  
  
  Started GET "/posts/dsdsdsdsd" for 127.0.0.1 at 2013-10-30 15:37:57 +0100
  
  Processing by PostsController#show as HTML
  
    Parameters: {"id"=>"dsdsdsdsd"}
  
    Post Load (0.5ms)  SELECT "posts".* FROM "posts" WHERE "posts"."permalink" = 'dsdsdsdsd' ORDER BY created_at desc LIMIT 1
  
    Admin Load (0.4ms)  SELECT "admins".* FROM "admins" WHERE "admins"."id" = 1 ORDER BY "admins"."id" ASC LIMIT 1
  
    Rendered posts/show.html.erb within layouts/application (4.3ms)
  
  Completed 200 OK in 17ms (Views: 14.3ms | ActiveRecord: 0.9ms)

• Can't preserve metadata in ffmpeg video conversion

  30 avril 2017, par sakovias

  I would like to preserve the creation time metadata when I convert videos using ffmpeg/avconv. Here is the file I’m trying to convert :

  $ ffmpeg -i in.avi 
  
  ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  
    built on Apr  2 2013 17:00:59 with gcc 4.6.3
  
  Input #0, avi, from 'in.avi':
  
    Metadata:
  
      creation_time   : 2013-08-12 06:59:14
  
      encoder         : CanonMVI06
  
    Duration: 00:00:12.26, start: 0.000000, bitrate: 14549 kb/s
  
      Stream #0.0: Video: mjpeg, yuvj422p, 640x480, 30 tbr, 30 tbn, 30 tbc
  
      Stream #0.1: Audio: pcm_u8, 11024 Hz, 1 channels, u8, 88 kb/s

  In the first approach I run

  $ ffmpeg -i in.avi -vcodec libx264 -acodec libmp3lame -r 30 -map_metadata 0 out.avi

  and get an output file which doesn’t have the ’creation_date’ metadata that I’d like to keep :

  $ ffmpeg -i out.avi 
  
  ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  
    built on Apr  2 2013 17:00:59 with gcc 4.6.3
  
  [avi @ 0x83ba260] max_analyze_duration reached
  
  Input #0, avi, from 'out.avi':
  
    Metadata:
  
      encoder         : Lavf53.21.1
  
    Duration: 00:00:12.38, start: 0.000000, bitrate: 704 kb/s
  
      Stream #0.0: Video: h264 (Main), yuv420p, 640x480, 30 fps, 30 tbr, 30 tbn, 60 tbc
  
      Stream #0.1: Audio: mp3, 11025 Hz, mono, s16, 200 kb/s

  I also tried another approach

  $ ffmpeg -i in.avi -f ffmetadata metadata.txt
  
  $ ffmpeg -i in.avi -f ffmetadata -i metadata.txt -vcodec libx264 -acodec libmp3lame -r 30 out.avi

  with the same success even though metadata.txt has the right info :

  ;FFMETADATA1
  
  creation_time=2013-08-12 06:59:14
  
  encoder=CanonMVI06

  What am I doing wrong ?