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Médias (2)
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Valkaama DVD Label
4 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Image
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Podcasting Legal guide
16 mai 2011, par
Mis à jour : Mai 2011
Langue : English
Type : Texte
Autres articles (102)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang 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. -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
Sur d’autres sites (10778)
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4 ways to create more effective funnels
24 février 2020, par Jake Thornton — Uncategorized -
FFMpeg SDR and HDR side-by-side video encoding
21 septembre 2023, par Famro FexlI am attempting to create a side-by-side video with FFMpeg using the hstack filter.


The SDR video is formatted as "AVC 8-bit YUV420p BT709 Gamma 2.4" and the HDR video is formatted as "HEVC 10-bit YUV420p10le BT2020 SMPTE2084 (with HDR10 metadata)".


In order for the gamma and color space to match, I tried to convert the SDR video to an HDR format using filtering.


Basically, I attempted to process the Rec.709 gamma 2.4 SDR content to Rec.2020 SMPTE2084 content so it could be combined and displayed in the same video. I'm not sure if the input pixel format mattered, at it appeared to be automatically transformed into the output pixel format. From everything I know, this should be theoretically possible.


Here is my FFMpeg command for converting the SDR video into HDR :

ffmpeg -i input.mkv -filter_complex "colormatrix=bt709:bt2020" -color_primaries bt2020 -color_trc smpte2084 -c:v libx265 out.mkv


The colorspace filter always returned the error
[Parsed Colorspace_0 @ addr] Unsupported input primaries 2 (unknown)
, when using the filter_complex `colorspace=all=bt2020", so I was never able to use it.

The HDR result had over-saturated reds in the color space and it was too dim in the gamma. I tried every gamma option available, but none of them matched the original SDR content.`


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avformat/movenc : remove the write_clli mov flag
13 avril 2020, par Michael Bradshawavformat/movenc : remove the write_clli mov flag
The clli atom is expected to be standardized soon. See
http://ffmpeg.org/pipermail/ffmpeg-devel/2020-April/259529.htmlWe now write the clli atom by default.
Signed-off-by : Michael Bradshaw <mjbshaw@google.com>