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  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Les images

    15 mai 2013

Sur d’autres sites (15655)

  • Combining audio and multiple videos with FFMPEG [closed]

    6 novembre 2023, par Lee P

    I am working on a ffmpeg script to combine two videos with one audio file. The first video file should start after about 6 seconds and the second after about 40 seconds, and there should be a padding with a black screen between the two videos.
However, it only seems to add the first video clones the final frame as the padding.

    


    Here is my current script :

    


    ffmpeg -i video_0.mp4 -i video_1.mp4 -i audio.mp4 -filter_complex "[0:v] tpad=start_duration=5927ms:start_mode=add:color=black:stop_mode=add:color=black; [1:v] tpad=start_duration=44901ms:start_mode=add:color=black:stop_mode=add:color=blackconcat=n=2" -map 2:a -f mp4 -movflags +faststart composite_recording.mp4


    


    The final video timing should be :

    


    00:00-00:06 — black screen
    
00:06-00:24 — first video
    
00:24-00:40 — black screen
    
00:40-00:48 — second video

    


    I tried setting different values for the tpad start_duration for the second video and expected it to start the second video at around 40 seconds into the audio, however it didn't change anything.

    


  • FFMPEG sidechaincompress not working as it should ?

    23 octobre 2017, par Taapo

    I have been trying to get sidechaining to work with FFMPEG, but my complex filter skills are lacking.

    I’m running two aif files into ffmpeg, hoping the voice would "duck" the background music when the voice-over is speaking. But I get an error with this command-line (on Windows, with latest FFMPEG binary) :

    ffmpeg.exe -i temp_music.aif -i temp_voice.aif \
    
-filter_complex "[1:a]asplit=2[sc][mix];[0:a] \
    
[sc]sidechaincompress=threshold=0.1:ratio=5[bg]; \
    
[bg][mix]amerge[fin‌​al]" -map [final] final.mp3

    Everything decodes fine :

        ffmpeg version N-87353-g183fd30 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 7.2.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
    
  libavutil      55. 76.100 / 55. 76.100
    
  libavcodec     57.106.101 / 57.106.101
    
  libavformat    57. 82.101 / 57. 82.101
    
  libavdevice    57.  8.101 / 57.  8.101
    
  libavfilter     6.105.100 /  6.105.100
    
  libswscale      4.  7.103 /  4.  7.103
    
  libswresample   2.  8.100 /  2.  8.100
    
  libpostproc    54.  6.100 / 54.  6.100
    
Guessed Channel Layout for Input Stream #0.0 : stereo
    
Input #0, aiff, from 'temp_music.aif':
    
  Duration: 00:01:26.68, start: 0.000000, bitrate: 1536 kb/s
    
    Stream #0:0: Audio: pcm_s16be, 48000 Hz, stereo, s16, 1536 kb/s
    
Guessed Channel Layout for Input Stream #1.0 : stereo
    
Input #1, aiff, from 'temp_voice.aif':
    
  Duration: 00:01:26.68, start: 0.000000, bitrate: 1536 kb/s
    
    Stream #1:0: Audio: pcm_s16be, 48000 Hz, stereo, s16, 1536 kb/s
    
Output with label 'final' does not exist in any defined filter graph, or was already used elsewhere.

    But then I receive an error :

    Output with label ’final’ does not exist in any defined filter graph,
    or was already used elsewhere.

    Anybody knows why ?

  • Anomalie #2142 (Nouveau) : Balise #SET - espace ajouté lors de l’affectation d’une variable

    1er juillet 2011, par Severo Lipari

    Le code suivant : #SETtoto, a "#GETtoto" rend "a " J’imagine que ca serait mieux si ca rendait "a" sans espace final...

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