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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • Configurer la prise en compte des langues

    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
    Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
    De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
    Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)

Sur d’autres sites (4583)

  • How to play video at exact seek time ?

    3 mai 2016, par RanceA

    I was working on a video player of an app and I ran into a problem.

    I need a video’s playing cycle locked into a specified time interval. For instance, I need a video loop to play from 00:04 to 00:08.

    My dilemma is, the video only has keyframes at 00:00 and 00:10, MediaPlayer.seekTo(4000) will seek the start time to 00:10 which is not what I expected. I need the video to play at a precise time, 00:04 to 00:08, not 00:00 to 00:10.

    FFPlay also supports AVSEEK_FLAG, but none of the flags seem to work in my case.

    Maybe playing at 00:00 then fast-forward encoding to 00:04 is a good idea, but I have no idea how to implement that. My FFMPEG experience is poor.

    Any help would be greatly appreciated.

  • 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

  • Wav audio file compression not working

    2 avril 2021, par Kitcha

    Is it possible to compress a wav audio file without reducing the sampling rate ?

    



    I have an audio file with 256 bit rate and sampling rate - 8000Hz. I would just like to reduce the bit rate to 128/64 kbs

    



    I tried converting to mp3 and back to wav,
 ffmpeg -i input.wav 1.mp3
 ffmpeg -i "1.mp3" -acodec pcm_s16le -ar 4000 out.wav
but this reduced sampling rate as well.
 ffmpeg -i "1.mp3" -acodec pcm_s16le -ab 128 out.wav has default 256 bit rate

    


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