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Autres articles (60)
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Les statuts des instances de mutualisation
13 mars 2010, parPour des raisons de compatibilité générale du plugin de gestion de mutualisations avec les fonctions originales de SPIP, les statuts des instances sont les mêmes que pour tout autre objets (articles...), seuls leurs noms dans l’interface change quelque peu.
Les différents statuts possibles sont : prepa (demandé) qui correspond à une instance demandée par un utilisateur. Si le site a déjà été créé par le passé, il est passé en mode désactivé. publie (validé) qui correspond à une instance validée par un (...) -
Problèmes fréquents
10 mars 2010, parPHP et safe_mode activé
Une des principales sources de problèmes relève de la configuration de PHP et notamment de l’activation du safe_mode
La solution consiterait à soit désactiver le safe_mode soit placer le script dans un répertoire accessible par apache pour le site -
Demande de création d’un canal
12 mars 2010, parEn fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...)
Sur d’autres sites (6961)
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Extracting audio features
27 avril 2023, par Srinjoy ChatterjeeI am working on extracting features from an audio file to build a recommendation system.


So far I am able to extract tempo, beat-times, loudness and pitch class using librosa and ffmpeg.


My question how we can extract/detect features as Danceability, Energy, Acousticness, Speechiness, Valence without using Spotify API. Are there any libraries or algorithm using which we can do so.


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jpg images to gif ffmpeg no data found in image
3 juillet 2023, par Idk123I was trying to use ffmpeg to create a gif from jpg images, but I wasn't able to convert them, not through a python code and not even from the dir itself in cmd




python code :


input_files = f"{BASE_DIR}\\qr_images\\qr%d.jpg"
command = f'ffmpeg -i {input_files} output.gif'
os.system(f'start /wait cmd /k {command}')





I need the files in the dir to be able to convert to gif using ffmpeg (I have it installed correctly)


this is the complete cmd dialog (if I run it from the dir in cmd or if i run the python code :


ffmpeg version 6.0-essentials_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers built with gcc 12.2.0 (Rev10, 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-libvpl —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 58. 2.100 / 58. 2.100 libavcodec 60. 3.100 / 60. 3.100 libavformat 60. 3.100 /
60. 3.100 libavdevice 60. 1.100 / 60. 1.100 libavfilter 9. 3.100 / 9. 3.100 libswscale 7. 1.100 / 7. 1.100 libswresample 4. 10.100 / 4. 10.100 libpostproc 57. 1.100 /
57. 1.100 [mjpeg @ 000002000696bfc0] No JPEG data found in image [mjpeg @ 000002000696bfc0] unable to decode APP fields : Invalid data found when processing input
Last message repeated 1 times [mjpeg @ 000002000696bfc0] No JPEG data found in image [mjpeg @ 000002000696bfc0] unable to decode APP fields : Invalid data found when processing input
Last message repeated 1 times [mjpeg @ 000002000696bfc0] Found EOI before any SOF, ignoring [mjpeg @ 000002000696bfc0] No JPEG data found in image [mjpeg @ 000002000696bfc0] bits 159 is invalid [mjpeg @ 000002000696bfc0] unable to decode APP fields : Invalid data found when processing input
Last message repeated 2 times [mjpeg @ 000002000696bfc0] bits 247 is invalid [mjpeg @ 000002000696bfc0] unable to decode APP fields : Invalid data found when processing input [mjpeg @ 000002000696bfc0] No JPEG data found in image [mjpeg @ 000002000696bfc0] unable to decode APP fields : Invalid data found when processing input [mjpeg @ 000002000696bfc0] No JPEG data found in image [image2 @ 000002000696aec0] Could not find codec parameters for stream 0 (Video : mjpeg (Progressive), none(bt470bg/unknown/unknown)) : unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options Input #0, image2, from 'c :\Test_proj\qr_images\qr%d.jpg' : Duration : 00:00:00.28, start :
0.000000, bitrate : N/A Stream #0:0 : Video : mjpeg (Progressive), none(bt470bg/unknown/unknown), 25 fps, 25 tbr, 25 tbn Stream mapping : Stream #0:0 -> #0:0 (mjpeg (native) -> gif (native)) Press [q] to stop, [?] for help [mjpeg @ 00000200069a35c0] mjpeg : unsupported coding type (c5) [mjpeg @ 00000200069a35c0] mjpeg : unsupported coding type (ca) Error while decoding stream #0:0 : Invalid data found when processing input [mjpeg @ 00000200069a35c0] unable to decode APP fields : Invalid data found when processing input
Last message repeated 1 times [mjpeg @ 00000200069a35c0] mjpeg : unsupported coding type (ce) [mjpeg @ 00000200069a35c0] No JPEG data found in image Error while decoding stream #0:0 : Invalid data found when processing input [mjpeg @ 00000200069a35c0] unable to decode APP fields : Invalid data found when processing input
Last message repeated 1 times [mjpeg @ 00000200069a35c0] mjpeg : unsupported coding type (cb) [mjpeg @ 00000200069a35c0] Found EOI before any SOF, ignoring [mjpeg @ 00000200069a35c0] Can not process SOS before SOF, skipping [mjpeg @ 00000200069a35c0] No JPEG data found in image Error while decoding stream #0:0 : Invalid data found when processing input [mjpeg @ 00000200069a35c0] bits 159 is invalid Error while decoding stream #0:0 : Invalid data found when processing input [mjpeg @ 00000200069a35c0] unable to decode APP fields : Invalid data found when processing input
Last message repeated 2 times [mjpeg @ 00000200069a35c0] bits 247 is invalid Error while decoding stream #0:0 : Invalid data found when processing input [mjpeg @ 00000200069a35c0] unable to decode APP fields : Invalid data found when processing input [mjpeg @ 00000200069a35c0] mjpeg : unsupported coding type (c6) [mjpeg @ 00000200069a35c0] No JPEG data found in image Error while decoding stream #0:0 : Invalid data found when processing input [mjpeg @ 00000200069a35c0] Can not process SOS before SOF, skipping [mjpeg @ 00000200069a35c0] unable to decode APP fields : Invalid data found when processing input [mjpeg @ 00000200069a35c0] Can not process SOS before SOF, skipping
Last message repeated 2 times [mjpeg @ 00000200069a35c0] No JPEG data found in image Error while decoding stream #0:0 : Invalid data found when processing input Cannot determine format of input stream 0:0 after EOF Error marking filters as finished Conversion failed !


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using ffmpeg in C : system() or C api ?
5 décembre 2018, par toastedDeliI want to use ffmpeg’s transcoding features multiple times in my program. This can be achieved by doing
ffmpeg -i input output
in a terminal. I believe I can use some shell or C code to execute these commands programmatically.
I could also directly use ffmpeg’s c libraries to do this. My question is, will there be a noticeable performance difference between the 2 approaches ? Obviously the first will be simpler to implement, but will I pay a big performance cost ?