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Autres articles (86)

  • 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

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

Sur d’autres sites (8974)

  • ffmpeg : move A/V non-streamcopy initialization to a later point

    10 septembre 2020, par Jan Ekström
    ffmpeg : move A/V non-streamcopy initialization to a later point

    - For video, this means a single initialization point in do_video_out.

    - For audio we unfortunately need to do it in two places just
    
  before the buffer sink is utilized (if av_buffersink_get_samples
    
  would still work according to its specification after a call to
    
  avfilter_graph_request_oldest was made, we could at least remove
    
  the one in transcode_step).
    

    Other adjustments to make things work :

    - As the AVFrame PTS adjustment to encoder time base needs the encoder
    
  to be initialized, so it is now moved to do_video,audio_out,
    
  right after the encoder has been initialized. Due to this,
    
  the additional parameter in do_video_out is removed as it is no
    
  longer necessary.
    • [DH] fftools/ffmpeg.c

  • FFMPEG : Overlaying one video on another one, and making black pixels transparent

    26 juillet 2016, par Michael A

    I’m trying to use FFMPEG to create a video with one video overlayed on top another.

    I have 2 MP4s. I need to make all BLACK pixels in the overlay video transparent so that I can see the main video underneath it.

    I found two ways to overlay one video on another :

    First, the following positions the overlay in the center, and therefore, hides that portion of the main video beneath it :

        ffmpeg -i 1.mp4 -vf "movie=2.mp4 [a]; [in][a] overlay=352:0 [b]" combined.mp4 -y

    And, this one, places the overlay video on the left, but it’s opacity is set to 50% so at least other one beneath it is visible :

    ffmpeg -i 1.mp4 -i 2.mp4 -filter_complex "[0:v]setpts=PTS-STARTPTS[top]; [1:v]setpts=PTS-STARTPTS, format=yuva420p,colorchannelmixer=aa=0.5[bottom]; [top][bottom]overlay=shortest=0" -acodec libvo_aacenc -vcodec libx264 out.mp4 -y

    My goal is simply to make all black pixels in the overlay (2.mp4) completely transparent. How can this be done.

  • avcodec/hevc/hevcdec : avoid signed shifts with lt_idx_sps

    19 juillet 2024, par Michael Niedermayer
    avcodec/hevc/hevcdec : avoid signed shifts with lt_idx_sps

    Fixes : left shift of 1 by 31 places cannot be represented in type 'int'
    
Fixes : 70122/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-5172200613675008
    

    Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/hevc/hevcdec.c

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