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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 (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs

    12 avril 2011, par

    La manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
    Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.

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  • ffmpeg : is there a simple way to edit the video resolution, but keep all audio and subtitles

    21 avril 2022, par Arkeen

    I would like to lower video resolution - usually from .mkv files - but to keep all possible audio tracks (might be only one, might be several) and subtitles (might be none, might be several) from the original one. I also would like to keep as many encoding parameters as I can from the original video file (especially those I do not understand).

    


    I am still new to ffmpeg : at first the idea seemed simple, but after many attempts, it seems it is more complex than that. Do I have to use the -filter_complex option ? It seems to be an overkill (or overcomplex) for what I thought to be an easy conversion, but I might be wrong.

    


    I tried to combine -vf scale=-1:720 with -c copy -map 0, which gave me an error that I now understand, but I am stuck with the next step.

    


    Any lead on to achieve that ? Could it be done with ffmpeg only or would I need a script ?

    


  • avcodec/v4l2_context : don't reinit output queue on dynamic resolution change event

    4 janvier 2022, par Ming Qian
    avcodec/v4l2_context : don't reinit output queue on dynamic resolution change event

    Reference :
    
linux/Documentation/userspace-api/media/v4l/dev-decoder.rst
    
    "During the resolution change sequence, the OUTPUT queue must remain
    
     streaming. Calling VIDIOC_STREAMOFF() on the OUTPUT queue would
    
     abort the sequence and initiate a seek.
    

         In principle, the OUTPUT queue operates separately from the CAPTURE
    
     queue and this remains true for the duration of the entire
    
     resolution change sequence as well."
    

    Reviewed-by : Andriy Gelman <andriy.gelman@gmail.com>
    
Signed-off-by : Ming Qian <ming.qian@nxp.com>
    • [DH] libavcodec/v4l2_context.c

  • avcodec/v4l2_context : send start decode command after dynamic resolution change event

    4 janvier 2022, par Ming Qian
    avcodec/v4l2_context : send start decode command after dynamic resolution change event

    Fixes decoding of sample https://streams.videolan.org/ffmpeg/incoming/720p60.mp4
    
on RPi4 after kernel driver commit :
    
staging : bcm2835-codec : Format changed should trigger drain
    

    Reference :
    
linux/Documentation/userspace-api/media/v4l/dev-decoder.rst
    
    "A source change triggers an implicit decoder drain, similar to the
    
     explicit Drain sequence. The decoder is stopped after it completes.
    
     The decoding process must be resumed with either a pair of calls to
    
     VIDIOC_STREAMOFF and VIDIOC_STREAMON on the CAPTURE queue, or a call to
    
     VIDIOC_DECODER_CMD with the V4L2_DEC_CMD_START command."
    

    Reviewed-by : Andriy Gelman <andriy.gelman@gmail.com>
    
Signed-off-by : Ming Qian <ming.qian@nxp.com>
    • [DH] libavcodec/v4l2_context.c

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