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Autres articles (44)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (9458)

  • Which Ruby gem should I use to be able to open a video file seek to the keyframes and save them as an image ?

    10 juin 2013, par Konstantin

    I think of some ffmpeg wrapper or libav, which allow to seek to the keyframes relatively fast.

  • FFmpeg trim .3gp and save as .mp4 not working

    11 avril 2016, par SebSob

    I am trying to trim a video input .3gp (http://www.sample-videos.com/video/3gp/144/big_buck_bunny_144p_2mb.3gp) and save it as .mp4, this is my command :

    ffmpeg -ss 00:00:00.000 -y -i input_vid.3gp -strict experimental -preset ultrafast -t 00:00:03.637 -r 30 -s 176x144 -ar 44100 -b:v 4000k -minrate 4000k -maxrate 4000k -c:a copy -vcodec mpeg4 output_vid.mp4

    But it gives me the following error :

    Setting 'pix_fmts' to value 'yuv420p'
    
query_formats: 7 queried, 6 merged, 0 already done, 0 delayed
    
w:176 h:144 fmt:yuv420p sar:12/11 -> w:176 h:144 fmt:yuv420p sar:12/11 flags:0x4
    
Automatically choosing VBV buffer size of 232 kbyte
    
intra_quant_bias = 0 inter_quant_bias = -64
    
Could not find tag for codec amr_nb in stream #1, codec not currently supported in container
    
Output #0, mp4, to 'output_vid.mp4':
    
  Metadata:
    
    major_brand     : 3gp4
    
    minor_version   : 512
    
    compatible_brands: isomiso23gp4
    
    encoder         : Lavf56.23.100
    
    Stream #0:0(und), 0, 1/15360: Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 176x144 [SAR 12:11 DAR 4:3], q=2-31, 4000 kb/s, 30 fps, 15360 tbn, 30 tbc (default)
    
    Metadata:
    
      creation_time   : 1970-01-01 00:00:00
    
      handler_name    : VideoHandler
    
      encoder         : Lavc56.25.100 mpeg4
    
    Stream #0:1(und), 0, 1/8000: Audio: amr_nb (samr / 0x726D6173), 8000 Hz, mono, 12 kb/s (default)
    
    Metadata:
    
      creation_time   : 1970-01-01 00:00:00
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h263 (native) -> mpeg4 (native))
    
  Stream #0:1 -> #0:1 (copy)
    
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
    
exit_program: 1

    But it works fine if the input is an .mp4...

    Any idea’s ? Thanks

  • If multiple channels, merge then take sample length from audio file and save it to s3

    18 mai 2017, par khinester

    I am using transloadit to extract the audio from a video file, which is then saved to S3.
    This works great, but I wanted to know how to :

    1. check if the file has multiple channels and then squash it inot one as per https://transloadit.com/demos/audio-encoding/merging-multiple-audio-streams/ - do I need to check for this or do i default to use this robot ?

    2. extract a small sample from the audio file - and save this as a separate file.

    For example, I have a 2h audio file from which I want to take 5% of the length and save this as sample.mp3

    In ffmpeg, i can cut :

    ffmpeg -ss 0 -t 30 -i original.mp3 sample.mp3

    but I am unsure how to chain this workflow, here is what i have thus far :

    const opts = {
    
  params: {
    
    notify_url: `${ process.env.SELF }/services/trans/${ jwToken }`,
    
    steps:      {
    
      import: {
    
        robot:  '/s3/import',
    
        use:    ':original',
    
        bucket: process.env.S3_INGEST,
    
        path:   ingest.key,
    
        key:    process.env.AWS_ID,
    
        secret: process.env.AWS_SECRET,
    
      },
    
      encode: {
    
        robot:        '/audio/encode',
    
        use:          'import',
    
        ffmpeg_stack: 'v2.2.3',
    
        preset:       'aac',
    
        ffmpeg:       {
    
          ab:  '128k',
    
        },
    
      },
    
      export: {
    
        robot:   '/s3/store',
    
        use:     'encode',
    
        bucket:  s3Export,
    
        path:    `${ prefix }/${ token }.m4a`,
    
        headers: {
    
          'Content-Type': 'audio/mp4',
    
          'x-amz-server-side-encryption': 'AES256',
    
        },
    
        key:    process.env.AWS_ID,
    
        secret: process.env.AWS_SECRET,
    
      },
    
    },
    
  },
    
};

    in the docs, https://transloadit.com/docs/conversion-robots/ i can’t see how to do this ?

    any advice is much appreciated.

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