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Autres articles (105)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Formulaire personnalisable

    21 juin 2013, par

    Cette page présente les champs disponibles dans le formulaire de publication d’un média et il indique les différents champs qu’on peut ajouter. Formulaire de création d’un Media
    Dans le cas d’un document de type média, les champs proposés par défaut sont : Texte Activer/Désactiver le forum ( on peut désactiver l’invite au commentaire pour chaque article ) Licence Ajout/suppression d’auteurs Tags
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire. (...)

  • Qu’est ce qu’un masque de formulaire

    13 juin 2013, par

    Un masque de formulaire consiste en la personnalisation du formulaire de mise en ligne des médias, rubriques, actualités, éditoriaux et liens vers des sites.
    Chaque formulaire de publication d’objet peut donc être personnalisé.
    Pour accéder à la personnalisation des champs de formulaires, il est nécessaire d’aller dans l’administration de votre MediaSPIP puis de sélectionner "Configuration des masques de formulaires".
    Sélectionnez ensuite le formulaire à modifier en cliquant sur sont type d’objet. (...)

Sur d’autres sites (10712)

  • Overlaying jpg onto Mp4 using -VF

    16 février 2013, par brux

    I am using the following command to overlay a jpg :

    ffmpeg -i in.mp4 -vf "movie=bb.png [movie] ; [in] [movie] overlay=0:0 [out]" -vcodec libx264 -acodec copy out.mp4

    This works as expected with the first file (listed below) but it doesnt work with the second file. There is no error when I try with the second file, rather is creates an unusually large file that would not open :

    File 1 :

    [me@me ~]$ ffmpeg -i 2013-02-08.mp4 
    
ffmpeg version 1.0.git Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Jan 11 2013 00:12:08 with gcc 4.7.2 (GCC) 20120921 (Red Hat 4.7.2-2)
    
  configuration: 
    
  libavutil      52.  8.100 / 52.  8.100
    
  libavcodec     54. 74.100 / 54. 74.100
    
  libavformat    54. 37.100 / 54. 37.100
    
  libavdevice    54.  3.100 / 54.  3.100
    
  libavfilter     3. 23.101 /  3. 23.101
    
  libswscale      2.  1.102 /  2.  1.102
    
  libswresample   0. 17.101 /  0. 17.101
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2013-02-08.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    creation_time   : 2013-02-08 20:31:49
    
    encoder         : Lavf53.24.0
    
  Duration: 00:00:03.20, start: 0.000000, bitrate: 1030 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x576 [SAR 1:1 DAR 5:4], 1247 kb/s, 8.08 fps, 7.50 tbr, 15 tbn, 15 tbc
    
    Metadata:
    
      creation_time   : 2013-02-08 20:31:49
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 8000 Hz, mono, s16, 12 kb/s
    
    Metadata:
    
      creation_time   : 2013-02-08 20:31:49
    
      handler_name    : SoundHandler
    
At least one output file must be specified

    File 2

    [me@me ~]$ ffmpeg -i aq.mp4 
    
ffmpeg version 1.0.git Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Jan 11 2013 00:12:08 with gcc 4.7.2 (GCC) 20120921 (Red Hat 4.7.2-2)
    
  configuration: 
    
  libavutil      52.  8.100 / 52.  8.100
    
  libavcodec     54. 74.100 / 54. 74.100
    
  libavformat    54. 37.100 / 54. 37.100
    
  libavdevice    54.  3.100 / 54.  3.100
    
  libavfilter     3. 23.101 /  3. 23.101
    
  libswscale      2.  1.102 /  2.  1.102
    
  libswresample   0. 17.101 /  0. 17.101
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'aq.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    creation_time   : 2013-02-19 20:33:16
    
    encoder         : Lavf53.24.0
    
  Duration: 00:00:03.20, start: 0.000000, bitrate: 1394 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x576 [SAR 1:1 DAR 5:4], 1451 kb/s, 30 fps, 30 tbr, 30 tbn, 60 tbc
    
    Metadata:
    
      creation_time   : 2013-02-19 20:33:16
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 8000 Hz, mono, s16, 12 kb/s
    
    Metadata:
    
      creation_time   : 2013-02-19 20:33:16
    
      handler_name    : SoundHandler
    
At least one output file must be specified

    In case it is important I am capturing these videos with Android devices. The first mp4 file is created by a Nexus 7, the second (the file which wont overlay the image) is created using a HTC Desire.

  • aac-eld decode linux

    28 février 2013, par bernard

    I'm was in Vietnam and tried to learn Vietnames.
    The difficult thing is to learn the pronunciation and I made an Android App to record voices. Vietnamese people are very nice and I collected more than 500 sound files.

    Now I try to make a language learning app. To do that I try to reduce noise and normalize volume.

    I have chosen the following settings :

    this.recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    
this.recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC_ELD);
    
this.recorder.setAudioEncodingBitRate(96000);
    
this.recorder.setAudioSamplingRate(44100);

    (cordova AudioPlayer.java - default settings are crap)

    Now I have a problem. I'm not able to open the files with audacity or ffmpeg.

    ./ffmpeg -i /tmp/speaker__ualp__x%E1%BA%A5u.mp4 /tmp/uu.wav
    
ffmpeg version 1.1.2 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Feb 20 2013 10:50:54 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
    
  configuration: --enable-libfdk-aac
    
  libavutil      52. 13.100 / 52. 13.100
    
  libavcodec     54. 86.100 / 54. 86.100
    
  libavformat    54. 59.106 / 54. 59.106
    
  libavdevice    54.  3.102 / 54.  3.102
    
  libavfilter     3. 32.100 /  3. 32.100
    
  libswscale      2.  1.103 /  2.  1.103
    
  libswresample   0. 17.102 /  0. 17.102
    
[aac @ 0xaada980] Audio object type 39 is not supported.
    
    Last message repeated 1 times
    
Guessed Channel Layout for  Input Stream #0.0 : mono
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/speaker__ualp__x%E1%BA%A5u.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 0
    
    compatible_brands: isom3gp4
    
    creation_time   : 2013-01-29 15:53:11
    
  Duration: 00:00:01.21, start: 0.000000, bitrate: 116 kb/s
    
    Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 96 kb/s
    
    Metadata:
    
      creation_time   : 2013-01-29 15:53:11
    
      handler_name    : SoundHandle
    
[aac @ 0xaada980] Audio object type 39 is not supported.
    
Output #0, wav, to '/tmp/uu.wav':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 0
    
    compatible_brands: isom3gp4
    
    Stream #0:0(eng): Audio: pcm_s16le, 44100 Hz, mono, s16, 705 kb/s
    
    Metadata:
    
      creation_time   : 2013-01-29 15:53:11
    
      handler_name    : SoundHandle
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (aac -> pcm_s16le)
    
Error while opening decoder for input stream #0:0

    What can I do ?

  • ffmpeg converts .flv video to .gif with awful quality [migrated]

    22 février 2013, par Kamil Hismatullin

    I'm converting .flv movie to .gif file with ffmpeg.

    ffmpeg -i input.flv -ss 00:00:00.000 -pix_fmt rgb24 -r 10 -s 320x240 -t 00:00:10.000  output.gif

    It works great, but output gif file has a very law quality.

    Any ideas how can I improve quality of converted gif ?

    Output of command :

    $ ffmpeg -i input.flv -ss 00:00:00.000 -pix_fmt rgb24 -r 10 -s 320x240 -t 00:00:10.000  output.gif 
    

    
ffmpeg version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers
    
  built on Jan 24 2013 14:52:53 with gcc 4.7.2
    
*** 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, mov,mp4,m4a,3gp,3g2,mj2, from 'input.flv':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: isommp42
    
    creation_time   : 2013-02-14 04:00:07
    
  Duration: 00:00:18.85, start: 0.000000, bitrate: 3098 kb/s
    
    Stream #0.0(und): Video: h264 (High), yuv420p, 1280x720, 2905 kb/s, 25 fps, 25 tbr, 50 tbn, 50 tbc
    
    Metadata:
    
      creation_time   : 1970-01-01 00:00:00
    
    Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 192 kb/s
    
    Metadata:
    
      creation_time   : 2013-02-14 04:00:07
    
[buffer @ 0x92a8ea0] w:1280 h:720 pixfmt:yuv420p
    
[scale @ 0x9215100] w:1280 h:720 fmt:yuv420p -> w:320 h:240 fmt:rgb24 flags:0x4
    
Output #0, gif, to 'output.gif':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: isommp42
    
    creation_time   : 2013-02-14 04:00:07
    
    encoder         : Lavf53.21.1
    
    Stream #0.0(und): Video: rawvideo, rgb24, 320x240, q=2-31, 200 kb/s, 90k tbn, 10 tbc
    
    Metadata:
    
      creation_time   : 1970-01-01 00:00:00
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
Press ctrl-c to stop encoding
    
frame=  101 fps= 32 q=0.0 Lsize=    8686kB time=10.10 bitrate=7045.0kbits/s dup=0 drop=149    
    
video:22725kB audio:0kB global headers:0kB muxing overhead -61.778676%

    Thanks.

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