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Autres articles (35)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (6283)

  • Audio clicks / cracklings with ffmpeg audio recording on mac os

    15 février 2023, par Specimen

    I'm having audio clicks on my ffmpeg audio recordings. If I record with OBS for example, the audio comes out just fine. This is what I put in the terminal :

    


    ffmpeg -f avfoundation -i ":0" test.mp3


    


    where 0 is my Soundflower audio device, which I found using ffmpeg -f avfoundation -list_devices true -i "", which returns :

    


    AVFoundation audio devices:
[0] Soundflower (2ch)


    


    Soundflower, my speakers, and the ffmpeg recording are all set at 48kHz.
There is another thread that states that this may be an issue with ffmpeg version 4.3, and to try to downgrade to 4.2 ; I tried to google how to downgrade on brew, but didn't find anything.

    


  • How to implement a command line of ffmpeg with ffmpeg static lib ?

    19 novembre 2014, par JackPearse

    I need a simple ffmpeg conversion task to be done inside an application :

    ffmpeg -i input_file.m4v -vcodec copy -acodec copy -vbsf h264_mp4toannexb output_file.ts

    This works well using the terminal. I’ve successfully compiled ffmpeg’s static lib. Some examples work perfectly, that means the lib is working. How do I implement the behaviour of the above command line with this library ?

    I looked into ffmpeg.c. But there is so much code inside that it took me hours to get an idea on how it works. Finally I still don’t really understand the whole structure.

    I would be very happy if someone could help me understanding how to use the library to do the very same what the example command line does. (At the end I just want to transmux mp4 files to ts files without reencoding)

    Thanks in advance

    Jack

  • ffmpeg set buf_len

    2 avril 2013, par Jeetendra_Nath_Jha

    I have been taken input from the device file /dev/video49.

    using ffmpeg, following command writing from the terminal :

    ffmpeg -f video4linux2 -i /dev/video49 -target ntsc-vcd -s 1920x1080 pixfmt:yuv420p -vstats -bufsize 225k -an -f mpegts -vcodec mpeg4 udp://127.0.0.1:10000?pkt_size=1316

    but it gives an error given below :

    ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Mar 20 2013 15:06:14 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
    
  configuration: 
    
  libavutil      52. 18.100 / 52. 18.100
    
  libavcodec     54. 92.100 / 54. 92.100
    
  libavformat    54. 63.104 / 54. 63.104
    
  libavdevice    54.  3.103 / 54.  3.103
    
  libavfilter     3. 42.103 /  3. 42.103
    
  libswscale      2.  2.100 /  2.  2.100
    
  libswresample   0. 17.102 /  0. 17.102
    
[video4linux2,v4l2 @ 0x95862a0] buf_len[0] = 1048576 < expected frame size 3110400
    
/dev/video49: Cannot allocate memory

    I don't know how to set the buf_len here...

    because in an error it says that the buf_len is need to be set.

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