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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 (13)
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Ajouter notes et légendes aux images
7 février 2011, parPour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
Modification lors de l’ajout d’un média
Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...) -
Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)
Sur d’autres sites (4049)
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Unable to find a suitable output format while cutting video
22 juillet 2018, par Java AndroidI am using below command to cut video-
String complexCommand = new String[]{"-y", "-i", yourRealPath, "-ss", "" + startMs / 1000, "-t", "" + (endMs - startMs) / 1000, "-c", "copy", filePath};
I got below error -
"ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers\n
built with gcc 4.8 (GCC)\n configuration : —target-os=linux
—cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi-
—arch=arm —cpu=cortex-a8 —enable-runtime-cpudetect —sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot
—enable-pic —enable-libx264 —enable-libass —enable-libfreetype —enable-libfribidi —enable-libmp3lame —enable-fontconfig —enable-pthreads —disable-debug —disable-ffserver —enable-version3 —enable-hardcoded-tables —disable-ffplay —disable-ffprobe —enable-gpl —enable-yasm —disable-doc —disable-shared —enable-static —pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config —prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a —extra-cflags=’-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include
-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all’ —extra-ldflags=’-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib
-Wl,-z,relro -Wl,-z,now -pie’ —extra-libs=’-lpng -lexpat -lm’ —extra-cxxflags=\n libavutil 55. 17.103 / 55. 17.103\n libavcodec 57. 24.102 / 57. 24.102\n libavformat 57. 25.100 /
57. 25.100\n libavdevice 57. 0.101 / 57. 0.101\n libavfilter 6. 31.100 / 6. 31.100\n libswscale 4. 0.100 / 4. 0.100\n libswresample 2. 0.101 / 2. 0.101\n libpostproc 54. 0.100 /
54. 0.100\nInput #0, mov,mp4,m4a,3gp,3g2,mj2, from ’/storage/emulated/0/Download/file3gpp.3gpp’ :\n Metadata :\n
major_brand : 3gp4\n minor_version : 0\n
compatible_brands : isom3gp4\n creation_time : 2018-04-09
12:04:29\n com.android.version : 7.1.1\n Duration : 00:00:04.88,
start : 0.000000, bitrate : 1425 kb/s\n Stream #0:0(eng) : Audio : aac
(LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 96 kb/s (default)\n
Metadata :\n creation_time : 2018-04-09 12:04:29\n
handler_name : SoundHandle\n[NULL @ 0xf622a600] Unable to find a
suitable output format for
’/storage/emulated/0/Movies/cut_video.3gpp’\n/storage/emulated/0/Movies/cut_video.3gpp :
Invalid argument\n"Why am i getting this error and how can i resolve it ?
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Ubuntu 16.04 + OpenCV + FFMPEG + CUDA don't open default camera
20 juillet 2018, par Newton Pasqualini FilhoI am trying to work with accelerated OpenCV using my own build of FFMPEG with CUDA support for GPU video processing using Python.
My application must support any kind of video devices, including USB and IP cameras.
I have a config file parsed with
ConfigParser
that loads the camera device path, as described in OpenCV documentation we can access usb camera by index number and for IP camera we use RTSP protocol so the path could be sometimes0
orrtsp://192.168.1.2/0
.To force the use of FFMPEG behind OpenCV I am trying to open the video capture stream like bellow :
video_capture = cv.VideoCapture()
stream_opened = video_capture.open(camera_path, cv.CAP_FFMPEG)The problem is when I try to open the default USB camera
camera_path = 0
thevideo_capture.open
method always returns false, but when it is a RTSP likecamera_path = "rtsp://192.168.1.2/1"
it open the video capture stream ok.When I let OpenCV decide what backend will be used it calls to GStreammer and it opens the capture stream like this :
video_capture = cv.VideoCapture(camera_path)
I suspect that FFMPEG does not have any support for capture video from a USB camera, does it ? Is there some missing feature to my ffmpeg build ?
ffmpeg version N-91487-g1809f1c Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
configuration: --prefix=/usr --pkg-config-flags=--static --enable-cuda-sdk --enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/ --extra-ldflags=-L/usr/local/cuda/lib64/ --nvccflags='-gencode arch=compute_61,code=sm_61 -O2' --enable-gpl --enable-libass --enable-libfdk-aac --enable-libx264 --extra-libs=-lpthread --enable-libx265 --enable-nvenc --enable-nonfree
libavutil 56. 18.102 / 56. 18.102
libavcodec 58. 21.105 / 58. 21.105
libavformat 58. 17.101 / 58. 17.101
libavdevice 58. 4.101 / 58. 4.101
libavfilter 7. 26.100 / 7. 26.100
libswscale 5. 2.100 / 5. 2.100
libswresample 3. 2.100 / 3. 2.100
libpostproc 55. 2.100 / 55. 2.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}... -
Split 2 video FFMpeg
19 juillet 2018, par Евгений Бреусcan you help me split 2 videos
enter image description hereffmpeg -i input1.mp4 -i input2.mp4 -filter_complex "[0:v][1:v]vstack[v];[0:a][1:a]amerge=inputs=2[a]" -map "[v]" -map "[a]" -ac 2 output.mp4
Don’t work
My complete log
C:\Users\forumrulez\Desktop\POST>ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex "[0:v][1:v]vstack[v];[0:a][1:a]amerge=inputs=2[a]" -map "[v]" -map "[a]" -ac 2 output.mp4
ffmpeg version N-91447-g0bd48ab2d9 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 7.3.1 (GCC) 20180709
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
libavutil 56. 18.102 / 56. 18.102
libavcodec 58. 21.104 / 58. 21.104
libavformat 58. 17.101 / 58. 17.101
libavdevice 58. 4.101 / 58. 4.101
libavfilter 7. 25.100 / 7. 25.100
libswscale 5. 2.100 / 5. 2.100
libswresample 3. 2.100 / 3. 2.100
libpostproc 55. 2.100 / 55. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.17.101
Duration: 00:01:00.08, start: 0.000000, bitrate: 586 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 260x480 [SAR 128:39 DAR 16:9], 428 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 152 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'input2.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.17.101
Duration: 00:01:00.08, start: 0.000000, bitrate: 703 kb/s
Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 360x480 [SAR 64:27 DAR 16:9], 545 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 152 kb/s (default)
Metadata:
handler_name : SoundHandler
File 'output.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
Stream #0:0 (h264) -> vstack:input0
Stream #0:1 (aac) -> amerge:in0
Stream #1:0 (h264) -> vstack:input1
Stream #1:1 (aac) -> amerge:in1
vstack -> Stream #0:0 (libx264)
amerge -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[Parsed_amerge_1 @ 00000165b1e6af00] No channel layout for input 1
[Parsed_amerge_1 @ 00000165b1e6af00] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
[Parsed_vstack_0 @ 00000165b29f1040] Input 1 width 360 does not match input 0 width 260.
[Parsed_vstack_0 @ 00000165b29f1040] Failed to configure output pad on Parsed_vstack_0
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #1:0
Conversion failed!