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Autres articles (22)

  • 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

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

Sur d’autres sites (6124)

  • avcodec/hap : set bits_per_coded_sample

    23 octobre 2015, par Tom Butterworth
    avcodec/hap : set bits_per_coded_sample

    fixes issue where alpha is ignored in some players
    

    Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/hapenc.c

  • FFMPEG Encoding to prores 4444 with alpha doesn't retain original alpha [closed]

    19 mai 2023, par Nick Weeden

    I'm trying to convert an rgba png to prores 4444 with an alpha. When I run the following command it will create prores file with an alpha. But, the alpha is full white, it doesn't retain the values I put in.

    &#xA;

    ffmpeg -start_number 1001 -r 24.000 - "pngWithAlpha_%06d.png" -c:v prores_ks -profile:v 4 -alpha_bits 16 -y "proresWithAlpha.mov"&#xA;

    &#xA;

    I've tried this with both FFMPEG 4.2.2 and 6.0.0 on a linux system, I'm not sure if I'm doing it wrong or if it is a bug.

    &#xA;

    Looking at this post it seems it should be possible (they're complaining about quality not a fully missing transfer of the alpha).

    &#xA;

    I would expect it to pass the alpha straight through but it doesn't. I used alpha_extract to copy the alpha in to the rgb to confirm I'm able to read the alpha from the png, which worked. But the alpha was still full white.

    &#xA;

  • Convert a Video_TS dir to a single mp4 or mkv file ?

    29 août 2018, par RocketNuts

    I’ve got a file-to-file copy from a DVD, consisting of a Video_TS directory with a bunch of BUP, IFO and VOB files. I can open some (not all) of these files in a player like VLC, and it seems to contain fragments of the movie but it appears like garbage. As if the encoding or file structure is corrupted.

    However, if I open the entire Video_TS dir with VLC, it plays fine.

    Is there a way to convert this Video_TS dir to one single video file, such as an MP4 or MKV ?

    I’ve read about the possibility of binary concatenating the VOB files, and I tried that, but to no avail. Also I wouldn’t know how to the determine the exact order of the VOB files, and more importantly that information must be within the files itself somehow (considering that video players can play it automatically).

    (edit) Someone edited the question and removed the ffmpeg part. Sorry if I didn’t clarify this further : I’m actually explicitly looking for a way to do this with ffmpeg (from shell, on macOS).

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