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Autres articles (63)

  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

  • 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

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

Sur d’autres sites (8999)

  • lavfi/vf_vpp_qsv : scale_mode can be applied to color conversion

    28 novembre 2022, par Haihao Xiang
    lavfi/vf_vpp_qsv : scale_mode can be applied to color conversion

    Reviewed-by : Soft Works <softworkz@hotmail.com>
    
Signed-off-by : Haihao Xiang <haihao.xiang@intel.com>
    • [DH] libavfilter/vf_vpp_qsv.c

  • FFmpeg - How to choose video stream based on resolution

    23 septembre 2023, par Sylven

    I want to choose the video stream based on it's quality, let's say I want to choose one video stream with certain resolution.

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    Manually selecting the video stream is not good enough for me because I want to process many files in bulk and they have the video streams in different order, so always going for certain position would make me end up with different resolutions.

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    I don't want to use filters as that would make me reencode which I don't need and would make it way slower.

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    I've tried using the -map with metadata but the only key that is different is "variant_bitrate" which has slightly different values everytime, so unless I can use some wildcard or conditionals, I guess it won't work either.

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    What I want to try now is to obtain the exact bitrate of the stream using ffmpeg or ffprobe and then pass it to the ffmpeg command so it ends in something like this :

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    ffmpeg -i <url> -map m:variant_bitrate:1760000 ...</url>

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    PD : I've been reading the FFmpeg documentation and browsing the whole internet without luck.

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    Edit :&#xA;I managed to make it work by first using ffprobe to obtain stream info in json format (easier to parse), then I search for the string "height": 540 and extract next 50 lines (counted them manually so I'm sure I'll pick the value I need), then I search for the string variant_bitrate and then I use a regular expression to extract the bitrate. Once I have the bitrate I make use of the MacOS clipboard (with pbcopy and pbpaste) to pass the value to the final ffmpeg command through the -map option using a metadata selector.

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    ffprobe -v error -show_streams -of json "https://streamlink.com/master.m3u8?f=dash"&#xA;| grep -A 50 &#x27;"height": 540&#x27; &#xA;| grep variant_bitrate&#xA;| grep -oe &#x27;\([0-9.]*\)&#x27; &#xA;| pbcopy&#xA;&amp;&amp; ffmpeg -protocol_whitelist file,http,https,tcp,tls,crypto -i "https://streamlink.com/master.m3u8?f=dash" -map "0:a:0" -map "m:variant_bitrate:$(pbpaste)" -c copy "Output.mp4"&#xA;

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    (added line breaks for readability)

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    I know it looks kinda dirty but I didn't find any other way to achieve my requirement.

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  • How can we switch channel displayed with ffmpeg daemon ?

    24 mai 2022, par Anna Agobian

    Is it possible to have a ffmpeg daemon and an interactive command to switch which channel we want to see ?

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    In fact I have a web server which displays a stream composed by multiple channel, and I want to switch between them.

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