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Autres articles (67)
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Gestion générale des documents
13 mai 2011, parMédiaSPIP ne modifie jamais le document original mis en ligne.
Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...) -
Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (4875)
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encoding jpeg sequence with ffmpeg
2 août 2022, par Frog personI do not have much expertise. I have been trying to convert a 240 jpeg long sequence (in a folder named plane) in to a 24fps mp4 file. each file is named 0001.jpeg , 0002.jpeg and so on.
I have tried this
ffmpeg -framerate 24 -i C :\Desktop\plane\image%4d.jpg output.mp4 and some variations on that but nothing seems to work.


the above command results in this


C :\Users\username>ffmpeg -framerate 24 -i C :\Desktop\plane\image%4d.jpg output.mp4
ffmpeg version 2022-07-31-git-1368b5a725-essentials_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
configuration : —enable-gpl —enable-version3 —enable-static —disable-w32threads —disable-autodetect —enable-fontconfig —enable-iconv —enable-gnutls —enable-libxml2 —enable-gmp —enable-bzlib —enable-lzma —enable-zlib —enable-libsrt —enable-libssh —enable-libzmq —enable-avisynth —enable-sdl2 —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxvid —enable-libaom —enable-libopenjpeg —enable-libvpx —enable-mediafoundation —enable-libass —enable-libfreetype —enable-libfribidi —enable-libvidstab —enable-libvmaf —enable-libzimg —enable-amf —enable-cuda-llvm —enable-cuvid —enable-ffnvcodec —enable-nvdec —enable-nvenc —enable-d3d11va —enable-dxva2 —enable-libmfx —enable-libgme —enable-libopenmpt —enable-libopencore-amrwb —enable-libmp3lame —enable-libtheora —enable-libvo-amrwbenc —enable-libgsm —enable-libopencore-amrnb —enable-libopus —enable-libspeex —enable-libvorbis —enable-librubberband
libavutil 57. 30.100 / 57. 30.100
libavcodec 59. 40.100 / 59. 40.100
libavformat 59. 29.100 / 59. 29.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 46.101 / 8. 46.101
libswscale 6. 8.101 / 6. 8.101
libswresample 4. 8.100 / 4. 8.100
libpostproc 56. 7.100 / 56. 7.100
[image2 @ 0000018847e4d500] Could find no file with path 'C :\Desktop\plane\image%4d.jpg' and index in the range 0-4
C :\Desktop\plane\image%4d.jpg : No such file or directory


Any help will be greatly appreciated


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FFmpeg avutil.lib unresolved external symbol
2 août 2022, par Serei'm trying to use FFmpeg with visual sudio 2022 .NET 6 through an MSVC project.
I followed this tutorial : https://www.youtube.com/watch?v=qMNr1Su-nR8&ab_channel=HakanSoyalp.
I mean I have configureg Include (.h) file, library (.lib) files and dynamic (.dll) file copied into bin folder.
If I call for example the avformat_alloc_context() method inside the avformat.lib all work rightly, if I call for example av_file_map(...) inside the avutil.lib the compiler give me an error :
LNK2019 unresolved external symbol "int __cdecl av_file_map ...
But the avutil.lib is linked !!!
The same happen if I call other methods inside avutil.lib module.


Thanks for help...


Code :


extern "C"
{
 #include <libavformat></libavformat>avformat.h>
 #include <libavutil></libavutil>file.h> // av_file_map
}

int ConvertJPEGtoNALs(int argc, char* argv[])
{
 AVFormatContext* fmt_ctx = NULL;
 AVIOContext* avio_ctx = NULL;
 uint8_t* buffer = NULL, * avio_ctx_buffer = NULL;
 size_t buffer_size, avio_ctx_buffer_size = 4096;
 char* input_filename = NULL;
 int ret = 0;
 struct buffer_data bd = { 0 };
 if (argc != 2) {
 fprintf(stderr, "usage: %s input_file\n"
 "API example program to show how to read from a custom buffer "
 "accessed through AVIOContext.\n", argv[0]);
 return 1;
 }
 input_filename = argv[1];
 /* register codecs and formats and other lavf/lavc components*/
 //av_register_all(); //!deprecated
 /* slurp file content into buffer */
 ret = av_file_map(input_filename, &buffer, &buffer_size, 0, NULL);
 /* fill opaque structure used by the AVIOContext read callback */
 bd.ptr = buffer;
 bd.size = buffer_size; ???
 if (!(fmt_ctx = avformat_alloc_context())) {
 ret = AVERROR(ENOMEM);
 goto end;
 }
 //... to be continue ...
}


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FFMPEG - Get timestamp from hls stream while downloading
31 juillet 2022, par OytochI need to download a stream, take 1 frames per seconds for image analyse.


I use FFmpeg to take the frames with a pipe to my script.


ffmpeg -i XX.m3u8 -vcodec mjpeg -f image2pipe -r 1 -s 1280*720 pipe:1


For my analyse, I need the timestamp and in the HLS we have this data in the m3u8 file :


#EXT-X-PROGRAM-DATE-TIME:2022-07-31T19:10:12.745Z
#EXTINF:2.000,live
XXXXX.ts
#EXT-X-PROGRAM-DATE-TIME:2022-07-31T19:10:14.745Z


ffmpeg output also something like this


frame= 1 fps=0.0 q=7.5 size= 59kB time=00:00:01.00 bitrate= 480.3kbits/s speed= 36x


the problem is that we don't know which second we are downloading


is there a solution to get this timestamp ?
Thanks


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