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Autres articles (52)
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Selection of projects using MediaSPIP
2 mai 2011, parThe 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 (...) -
La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
L’espace de configuration de MediaSPIP
29 novembre 2010, parL’espace de configuration de MediaSPIP est réservé aux administrateurs. Un lien de menu "administrer" est généralement affiché en haut de la page [1].
Il permet de configurer finement votre site.
La navigation de cet espace de configuration est divisé en trois parties : la configuration générale du site qui permet notamment de modifier : les informations principales concernant le site (...)
Sur d’autres sites (5794)
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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