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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 (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Mise à disposition des fichiers
14 avril 2011, parPar défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...)
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Correct syntax for using ffmpeg CUDA to crop and scale videos [closed]
9 septembre 2024, par StuartMy NVIDIA and FFMPEG configuration is as follows :


Linux TestBox1 6.8.0-41-generic #41-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 2 20:41:06 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux


NVIDIA-Linux-x86_64-560.31.02


ffmpeg version git-2024-08-19-507c2a577
encoders:
 V....D av1_nvenc NVIDIA NVENC av1 encoder (codec av1)
 V....D h264_nvenc NVIDIA NVENC H.264 encoder (codec h264)
 V....D hevc_nvenc NVIDIA NVENC hevc encoder (codec hevc)
decoders:
 V..... av1_cuvid Nvidia CUVID AV1 decoder (codec av1)
 V..... h264_cuvid Nvidia CUVID H264 decoder (codec h264)
 V..... hevc_cuvid Nvidia CUVID HEVC decoder (codec hevc)
 V..... mjpeg_cuvid Nvidia CUVID MJPEG decoder (codec mjpeg)
 V..... mpeg1_cuvid Nvidia CUVID MPEG1VIDEO decoder (codec mpeg1video)
 V..... mpeg2_cuvid Nvidia CUVID MPEG2VIDEO decoder (codec mpeg2video)
 V..... mpeg4_cuvid Nvidia CUVID MPEG4 decoder (codec mpeg4)
 V..... vc1_cuvid Nvidia CUVID VC1 decoder (codec vc1)
 V..... vp8_cuvid Nvidia CUVID VP8 decoder (codec vp8)
 V..... vp9_cuvid Nvidia CUVID VP9 decoder (codec vp9)
filters:
 ... bilateral_cuda V->V GPU accelerated bilateral filter
 T.. bwdif_cuda V->V Deinterlace CUDA frames
 ... chromakey_cuda V->V GPU accelerated chromakey filter
 ... colorspace_cuda V->V CUDA accelerated video color converter
 ..C crop V->V Crop the input video.
 T.C cropdetect V->V Auto-detect crop size.
 ... hwupload_cuda V->V Upload a system memory frame to a CUDA device.
 ... overlay_cuda VV->V Overlay one video on top of another using CUDA
 ... scale_cuda V->V GPU accelerated video resizer
 ... scale_npp V->V NVIDIA Performance Primitives video scaling and format conversion
 ... scale2ref_npp VV->VV NVIDIA Performance Primitives video scaling and format conversion to the given reference.
 ... sharpen_npp V->V NVIDIA Performance Primitives video sharpening filter.
 ... thumbnail_cuda V->V Select the most representative frame in a given sequence of consecutive frames.
 ... transpose_npp V->V NVIDIA Performance Primitives video transpose
 T.. yadif_cuda V->V Deinterlace CUDA frames



I would like to be able to use CUDA to crop and scale videos but I cannot find the correct syntax.
My efforts usually work in terms of the scale but not the crop, here is an example of the type of problems I have been having :


The source file in this example is a short mpeg2 video (960x540 with black bars top and bottom). The command is currently run from a bash script.


ffmpeg -y -hwaccel cuda -hwaccel_output_format cuda -c:v mpeg2_cuvid -crop 960x408x0x66 -i $1 -vf scale_npp=1280x544 -c:a copy -c:v h264_nvenc -b:v 2M -preset slow $2



This is throwing the following error :


[mpeg2_cuvid @ 0x5e6d9deb56c0] cuvid decode callback error
[vist#0:0/mpeg2video @ 0x5e6d9de85b40] [dec:mpeg2_cuvid @ 0x5e6d9de7b7c0] Decoding error: Generic error in an external library



Have I a problem with my ffmpeg build, should the list of filters include something like crop_cuda or crop_npp or have I just got the wrong syntax to perform everything on the GPU (is it even possible).