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Autres articles (60)
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Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
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Dépôt de média et thèmes par FTP
31 mai 2013, parL’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...) -
Keeping control of your media in your hands
13 avril 2011, parThe 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 (9173)
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ffmpeg fix video orientation
17 mars 2014, par PiTheNumberA video can contain a meta info about the camera orientation. For example iPhone and other phones set this flag if you turn the device. Problem is while some player read this info and rotate the video accordingly, other players do not.
To fix this the video has to be rotated and the meta info needs to be set correctly.
Does ffmpeg provide a fix for this or do I have to go the hard way (Read rotation, rotate, set meta data)
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AR Drone 2.0 video streaming whitout SDK on iOS
10 janvier 2014, par JosephITAI'm coding an app for iOS that interact with the AR Drone 2.0 without using the SDK (poor documentation on the iPhone example).
At the moment I can send command and receive navdata.
I have no idea in how to receive video streaming. I know that is an H.264 stream and that I can use ffmpeg, but I'm not sure that this solution will pass the Apple revision.
Any ideas ? -
Why frame->pts increases by 20, rather than by 1 ?
19 mars 2013, par user1914692Following the exmaples of ffmpeg : decoding_encoding.c and filtering_video.c, I process one video file taken by iPhone. The video file : .mov, video dimensions ; 480x272, video Codec : H.264/AVC, 30 frames per second, bitrate : 605 kbps.
I first extract each frame, which is YUV.
I convert YUV to RGB24, and process the RGB24, then write the RGB24 to a .ppm file. It shows the .ppm file is correct.Then I plan to encode processed RGB24 frames to a video file.
Since MPEG does not support RGB24 picture format, I used AV_CODEC_ID_HUFFYUV.
But the output video file (showing 18.5 MB) does not play. Movie Player on Ubuntu claims an error : Could not determine type of stream.
I also tried it on VCL. It simply does not work, without any error information.My second questions is :
For each extracted fram from the input video file, I get its pts as follows according to filtering_video.c :frame->pts = av_frame_get_best_effort_timestamp(frame);
I print out each frame's pts, and find that it increases by 20, like below :
pFrameRGB_count: 0, frame->pts: 0
pFrameRGB_count: 1, frame->pts: 20
pFrameRGB_count: 2, frame->pts: 40
pFrameRGB_count: 3, frame->pts: 60Where frame is the extracted frame from the input video, and pFrameRGB_count is the count for processed frame in RGB24 form.
Why are they wrong ?