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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (96)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
Sur d’autres sites (6606)
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ffmpeg error with device when transcoding from HEVC to H.264 on GPU using NVENC [closed]
5 décembre 2022, par SlakterI wanted to transcode my videos that have hevc encoding into h.264 using ffmpeg with Nvidia CUDA acceleration.
Basically I've followed the guide provided in the official documentation and read through CUDA part in here


My GPU is GeForce RTX2060 and the OS is Windows 10


ffmpeg configuration just after start says :


ffmpeg version 5.1.2-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-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-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. 28.100 / 57. 28.100
 libavcodec 59. 37.100 / 59. 37.100
 libavformat 59. 27.100 / 59. 27.100
 libavdevice 59. 7.100 / 59. 7.100
 libavfilter 8. 44.100 / 8. 44.100
 libswscale 6. 7.100 / 6. 7.100
 libswresample 4. 7.100 / 4. 7.100
 libpostproc 56. 6.100 / 56. 6.100



So all the required options for Nvidia encoding are in the list.


Then I tried to transcode a video in mkv format with encoding H.265 (hevc) into h.264 using h264_nvenc .
Here is the line


ffmpeg -hwaccel cuda -hwaccel_device 0 -hwaccel_output_format cuda -extra_hw_frames 14 -i .\input.mkv -c:v h264_nvenc -profile:v high444p -pixel_format yuva444p16le -preset lossless -b:v 1M output.mp4 -y



Even when I leave just this, the error is the same


ffmpeg -hwaccel cuda -hwaccel_device 0 -hwaccel_output_format cuda -i .\Violet1.mkv -c:v h264_nvenc output.mp4 -y



Here is the error message :


Stream mapping:
 Stream #0:0 -> #0:0 (hevc (native) -> h264 (h264_nvenc))
 Stream #0:1 -> #0:1 (opus (native) -> aac (native))
Press [q] to stop, [?] for help
[h264_nvenc @ 000002023642d7c0] 10 bit encode not supported
[h264_nvenc @ 000002023642d7c0] Provided device doesn't support required NVENC features
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height



Also, If I take another file with encoding H.265 (hev1) in mp4 format and use the command below, then it works fine.


ffmpeg -hwaccel cuda -hwaccel_device 0 -hwaccel_output_format cuda -extra_hw_frames 5 -i .\hev1.mp4 -gpu 0 -c:v h264_nvenc -profile:v high444p -preset lossless -b:v 1M output.mp4 -y



It's the same as the first command but with different
extra_hw_frames
and output file

My guess is that the problem in encoding from mkv or hevc codec specifically or maybe I have to change some options, but I haven't found anything about this error in the net. Thanks everyone how could help


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How to configure FFmpeg in windows ? [closed]
2 août 2021, par GrassWarlockHey there i'm not very tech savvy.


when i invoke this command :


ffmpeg -i input.mp4 -i subtitles.srt -map 0 -map 1 -c copy -c:v libx264 -crf 23 -preset veryfast output.mp4



( which is supposed to overlay 'input.mp4' with subtitles from 'subtitle.srt' )


i get the following output :


ffmpeg version 2021-07-27-git-0068b3d0f0-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 10.3.0 (Rev5, 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-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --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-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 57. 2.100 / 57. 2.100
 libavcodec 59. 3.102 / 59. 3.102
 libavformat 59. 4.101 / 59. 4.101
 libavdevice 59. 0.100 / 59. 0.100
 libavfilter 8. 1.103 / 8. 1.103
 libswscale 6. 0.100 / 6. 0.100
 libswresample 4. 0.100 / 4. 0.100
 libpostproc 56. 0.100 / 56. 0.100
Input #0, matroska,webm, from 'video.mkv':
 Metadata:
 ENCODER : Lavf59.4.101
 Duration: 00:05:39.94, start: 0.000000, bitrate: 665 kb/s
 Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv), 720x480, SAR 1:1 DAR 3:2, 29.97 fps, 29.97 tbr, 1k tbn (default)
 Metadata:
 DURATION : 00:05:39.839000000
 Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp (default)
 Metadata:
 HANDLER_NAME : SoundHandler
 VENDOR_ID : [0][0][0][0]
 DURATION : 00:05:39.940000000
Input #1, srt, from 'subtitles.srt':
 Duration: N/A, bitrate: N/A
 Stream #1:0: Subtitle: subrip
[mp4 @ 000001aa596242c0] Could not find tag for codec subrip in stream #2, codec not currently supported in container
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:2 --
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
 Stream #0:1 -> #0:1 (copy)
 Stream #1:0 -> #0:2 (copy)
 Last message repeated 1 times



i searched the internet and the official documentation mentions that libass should be enabled in the configuration in order for subtitling to work




11.218 subtitles


Draw subtitles on top of input video using the libass library.


To enable compilation of this filter you need to configure FFmpeg with
—enable-libass. This filter also requires a build with libavcodec and libavformat to convert the passed subtitles file to ASS (Advanced
Substation Alpha) subtitles format




how do i enable libass in configuration on windows ? my FFmpeg directory doesn't contain a configuration file nor a command that configures it from cmd


Thanks alot in advance


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Ffmpeg examples run in debug mode [on hold]
25 août 2017, par Saeid ZangenehI’m not so professional in c and cpp. I want to run FFmpeg official examples but there are many errors on include files. I can’t solve them.
below output :when i try to run or debug the sample code
debug output :
cd '/home/saeid/NetBeansProjects/CppApplication_2'
/usr/bin/make -f Makefile CONF=Debug
"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build- conf
make[1]: Entering directory '/home/saeid/NetBeansProjects
/CppApplication_2'
"/usr/bin/make" -f nbproject/Makefile-Debug.mk dist/Debug/GNU-
Linux/cppapplication_2
make[2]: Entering directory '/home/saeid/NetBeansProjects
/CppApplication_2'
mkdir -p dist/Debug/GNU-Linux
gcc -o dist/Debug/GNU-Linux/cppapplication_2 build/Debug/GNU-
Linux/sample.o
build/Debug/GNU-Linux/sample.o: In function `select_channel_layout':
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:87: undefined
reference to `av_get_channel_layout_nb_channels'
build/Debug/GNU-Linux/sample.o: In function `audio_encode_example':
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:112: undefined
reference to `avcodec_find_encoder'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:117: undefined
reference to `avcodec_alloc_context3'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:127: undefined
reference to `av_get_sample_fmt_name'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:134: undefined
reference to `av_get_channel_layout_nb_channels'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:136: undefined
reference to `avcodec_open2'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:146: undefined
reference to `av_frame_alloc'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:156: undefined
reference to `av_samples_get_buffer_size'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:162: undefined
reference to `av_malloc'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:169: undefined
reference to `avcodec_fill_audio_frame'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:179: undefined
reference to `av_init_packet'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:183: undefined
reference to `sin'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:189: undefined
reference to `avcodec_encode_audio2'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:196: undefined
reference to `av_free_packet'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:201: undefined
reference to `avcodec_encode_audio2'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:208: undefined
reference to `av_free_packet'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:212: undefined
reference to `av_freep'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:213: undefined
reference to `av_frame_free'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:214: undefined
reference to `avcodec_close'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:215: undefined
reference to `av_free'
build/Debug/GNU-Linux/sample.o: In function `audio_decode_example':
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:229: undefined
reference to `av_init_packet'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:232: undefined
reference to `avcodec_find_decoder'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:237: undefined
reference to `avcodec_alloc_context3'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:243: undefined
reference to `avcodec_open2'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:254: undefined
reference to `av_free'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:264: undefined
reference to `av_frame_alloc'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:269: undefined
reference to `avcodec_decode_audio4'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:276: undefined
reference to `av_get_bytes_per_sample'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:305: undefined reference to `avcodec_close'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:306: undefined reference to `av_free'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:307: undefined reference to `av_frame_free'build/Debug/GNU-Linux/sample.o : In function `video_encode_example’ :
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:323: undefined reference to `avcodec_find_encoder'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:328: undefined reference to `avcodec_alloc_context3'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:350: undefined reference to `av_opt_set'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:352: undefined reference to `avcodec_open2'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:361: undefined reference to `av_frame_alloc'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:371: undefined reference to `av_image_alloc'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:379: undefined reference to `av_init_packet'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:399: undefined reference to `avcodec_encode_video2'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:407: undefined reference to `av_free_packet'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:413: undefined reference to `avcodec_encode_video2'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:421: undefined reference to `av_free_packet'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:427: undefined reference to `avcodec_close'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:428: undefined reference to `av_free'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:429: undefined reference to `av_freep'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:430: undefined reference to `av_frame_free'
build/Debug/GNU-Linux/sample.o: In function `decode_write_frame':
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:452: undefined reference to `avcodec_decode_video2'build/Debug/GNU-Linux/sample.o : In function `video_decode_example’ :
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:481: undefined reference to `av_init_packet'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:486: undefined reference to `avcodec_find_decoder'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:491: undefined reference to `avcodec_alloc_context3'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:502: undefined reference to `avcodec_open2'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:511: undefined reference to `av_frame_alloc'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:545: undefined reference to `avcodec_close'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:546: undefined reference to `av_free'
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:547: undefined reference to `av_frame_free'
build/Debug/GNU-Linux/sample.o: In function `main':
/home/saeid/NetBeansProjects/CppApplication_2/sample.c:556: undefined
reference to `avcodec_register_all'
collect2: error: ld returned 1 exit status
nbproject/Makefile-Debug.mk:62: recipe for target 'dist/Debug/GNU-
Linux/cppapplication_2' failed
make[2]: *** [dist/Debug/GNU-Linux/cppapplication_2] Error 1
make[2]: Leaving directory '/home/saeid/NetBeansProjects/CppApplication_2'
nbproject/Makefile-Debug.mk:59: recipe for target '.build-conf' failed
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory '/home/saeid/NetBeansProjects/CppApplication_2'
nbproject/Makefile-impl.mk:39: recipe for target '.build-impl' failed
make: *** [.build-impl] Error 2