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The Slip - Artworks
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (46)
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Qu’est ce qu’un éditorial
21 juin 2013, parEcrivez votre de point de vue dans un article. Celui-ci sera rangé dans une rubrique prévue à cet effet.
Un éditorial est un article de type texte uniquement. Il a pour objectif de ranger les points de vue dans une rubrique dédiée. Un seul éditorial est placé à la une en page d’accueil. Pour consulter les précédents, consultez la rubrique dédiée.
Vous pouvez personnaliser le formulaire de création d’un éditorial.
Formulaire de création d’un éditorial Dans le cas d’un document de type éditorial, les (...) -
Publier sur MédiaSpip
13 juin 2013Puis-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 -
Contribute to translation
13 avril 2011You can help us to improve the language used in the software interface to make MediaSPIP more accessible and user-friendly. You can also translate the interface into any language that allows it to spread to new linguistic communities.
To do this, we use the translation interface of SPIP where the all the language modules of MediaSPIP are available. Just subscribe to the mailing list and request further informantion on translation.
MediaSPIP is currently available in French and English (...)
Sur d’autres sites (7741)
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How to use hardware accelearation with ffmpeg
25 avril 2014, par ixSciI need to have ffmpeg decode my video(e.g. h264) using hardware acceleration. I’m using the usual way of decoding frames : read packet -> decode frame. And I’d like to have ffmpeg speed up decoding. So I’ve built it with
--enable-vaapi
and--enable-hwaccel=h264
. But I don’t really know what should I do next. I’ve tried to useavcodec_find_decoder_by_name("h264_vaapi")
but it returns nullptr.
Anyway, I might want to use others API and not just VA API. How one is supposed to speed up ffmpeg decoding ?P.S. I didn’t find any examples on Internet which uses ffmpeg with hwaccel.
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Problems getting real width and height of videos
1er mai 2022, par EduardoI'm having a problem when I upload videos. The thing is that I record my videos with my cellphone in vertical way and when I download them to my computer or pass them through whatsapp they still look vertical, I can still watch them in vertical way as I recorded them, but when I try to upload them on my website using PHP and FFMPEG I always get horizontal resolutions.


I use this command to get the width of my videos :


$width = $video_attributes['width'] ;


The variable $video_attributes is an array that comes from a FFMPEG function that returns an array with the data related to the video.


Somebody could help me out with some ideas about what I'm doing wrong ?


I need to get the vertical resolution so my videos will be displayed in vertical containers in my website.


Thanks in advance :)


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Convert AVStream PTS value to real time in seconds
15 janvier 2015, par KamleshThe below code snippet gets the PTS value of different frames from a video file
AVStream *stream = avctx->streams[avpkt.stream_index];
if ( 0 > ( err = avcodec_decode_video2 ( stream->codec, frame, &got_frame, &avpkt ) && got_frame ) )
{
int64_t pts = av_frame_get_best_effort_timestamp ( frame );
pts = av_rescale_q ( pts, stream->time_base, AV_TIME_BASE_Q );
}The PTS value that it returns are given below.
- 66733
- 100100
- 133467
Confusion is on the time format of the above values, whether they are in milliseconds or microseconds.
Is there any other way to get a real time PTS values of the frames, as these will be required for subtitle rendering