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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 (52)
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XMP PHP
13 mai 2011, parDixit Wikipedia, XMP signifie :
Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...) -
Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users. -
MediaSPIP en mode privé (Intranet)
17 septembre 2013, parÀ partir de la version 0.3, un canal de MediaSPIP peut devenir privé, bloqué à toute personne non identifiée grâce au plugin "Intranet/extranet".
Le plugin Intranet/extranet, lorsqu’il est activé, permet de bloquer l’accès au canal à tout visiteur non identifié, l’empêchant d’accéder au contenu en le redirigeant systématiquement vers le formulaire d’identification.
Ce système peut être particulièrement utile pour certaines utilisations comme : Atelier de travail avec des enfants dont le contenu ne doit pas (...)
Sur d’autres sites (9039)
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YouTube isn't receiving any data from my FFmpeg stream to the RTMP server
9 novembre 2020, par Eniola OyewoleSo I have a Python program running on my computer that is sending the same image to an RTMP server every second : it is reading the image and then sending the data. From the console everything seems OK, but YouTube says that its not receiving any data.


Here is my code :


import subprocess
import cv2
rtmp_url = "rtmp://b.rtmp.youtube.com/live2/"

fps = 1.5

width = 600
height = 600

# command and params for ffmpeg
command = ['ffmpeg',
 '-y',
 '-f', 'rawvideo',
 '-vcodec', 'rawvideo',
 '-pix_fmt', 'bgr24',
 '-s', "{}x{}".format(width, height),
 '-r', str(fps),
 '-i', '-',
 '-c:v', 'libx264',
 '-pix_fmt', 'yuv420p',
 '-f', 'flv',
 rtmp_url]

# using subprocess and pipe to fetch frame data
p = subprocess.Popen(command, stdin=subprocess.PIPE)

while True:
 f = cv2.imread('assets/temporary.png')

 p.stdin.write(f.tobytes())


My console's output is :


[rtmp @ 0x28d9940] Server response validating failed
<videocapture 0x7f60895dafb0="0x7f60895dafb0">
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
 configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
 libavutil 55. 78.100 / 55. 78.100
 libavcodec 57.107.100 / 57.107.100
 libavformat 57. 83.100 / 57. 83.100
 libavdevice 57. 10.100 / 57. 10.100
 libavfilter 6.107.100 / 6.107.100
 libavresample 3. 7. 0 / 3. 7. 0
 libswscale 4. 8.100 / 4. 8.100
 libswresample 2. 9.100 / 2. 9.100
 libpostproc 54. 7.100 / 54. 7.100
Input #0, rawvideo, from 'pipe:':
 Duration: N/A, start: 0.000000, bitrate: 12960 kb/s
 Stream #0:0: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 600x600, 12960 kb/s, 1.50 fps, 1.50 tbr, 1.50 tbn, 1.50 tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
[libx264 @ 0x5613ba2e3d40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x5613ba2e3d40] profile High, level 2.2
[libx264 @ 0x5613ba2e3d40] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, flv, to 'rtmp://b.rtmp.youtube.com/live2/<key>':
 Metadata:
 encoder : Lavf57.83.100
 Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 600x600, q=-1--1, 1.50 fps, 1k tbn, 1.50 tbc
 Metadata:
 encoder : Lavc57.107.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame= 55 fps=0.0 q=19.0 size= 20kB time=00:00:01.33 bit
</key></videocapture>

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Why does the ffmpeg process hang ?
15 janvier 2021, par lavAzzaI try to make video from 2 jpeg (6912x3456 px, files is large it is 360 panoramas) with ffmpeg by


ffmpeg -r 1/4 -pattern_type glob -i "my_dir/*.jpg" -c:v libx264 -profile:v high -crf 18 -vf "fps=30,format=yuv420p" -movflags +faststart output.mp4


And ffmpeg process hang. I get


ffmpeg version 3.2.15-0+deb9u1 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
 configuration: --prefix=/usr --extra-version=0+deb9u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
 libavutil 55. 34.101 / 55. 34.101
 libavcodec 57. 64.101 / 57. 64.101
 libavformat 57. 56.101 / 57. 56.101
 libavdevice 57. 1.100 / 57. 1.100
 libavfilter 6. 65.100 / 6. 65.100
 libavresample 3. 1. 0 / 3. 1. 0
 libswscale 4. 2.100 / 4. 2.100
 libswresample 2. 3.100 / 2. 3.100
 libpostproc 54. 1.100 / 54. 1.100
Input #0, image2, from 'b90f8cc38a3ec7f6c4665ae0ba0e2b06/*.jpg':
 Duration: 00:00:00.08, start: 0.000000, bitrate: N/A
 Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 6912x3456, 25 tbr, 25 tbn, 25 tbc
File 'output.mp4' already exists. Overwrite ? [y/N] y
[swscaler @ 0x564d13ed9ac0] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0x564d13ecadc0] frame MB size (432x216) > level limit (36864)
[libx264 @ 0x564d13ecadc0] DPB size (4 frames, 373248 mbs) > level limit (1 frames, 184320 mbs)
[libx264 @ 0x564d13ecadc0] MB rate (2799360) > level limit (2073600)
[libx264 @ 0x564d13ecadc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x564d13ecadc0] profile High, level 5.2
[libx264 @ 0x564d13ecadc0] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
 Metadata:
 encoder : Lavf57.56.101
 Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 6912x3456, q=-1--1, 30 fps, 15360 tbn, 30 tbc
 Metadata:
 encoder : Lavc57.64.101 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream mapping:
 Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[output stream 0:0 @ 0x564d13ec6c60] 100 buffers queued in output stream 0:0, something may be wrong.


And htop shows



And only Ctrl+C helps.
But when there is one jpg file in the folder, ffmpeg is work fine.
My ffmpeg command works fine on another PC with WSL Debian on Win10. What is problem ?


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nginx RTMP to HLS : FFMPG error when trying multiple bitrate output [on hold]
28 mai 2014, par user3685074I’m currently trying to convert my RTMP Livestream into a HLS with 3 quality-settings.
I followed this guide
I’ve compiled my own FFMPEG and it’s working if I just convert 1 file.
It seems libx264 isn’t able to do multiple encodings at the same time ?I’m using these command :
exec /usr/local/bin/ffmpeg -i rtmp://localhost/src/$name
-c:a libfdk_aac -b:a 32k -c:v libx264 -b:v 128K -f flv rtmp://localhost/hls/$name_low
-c:a libfdk_aac -b:a 64k -c:v libx264 -b:v 256K -f flv rtmp://localhost/hls/$name_mid
-c:a libfdk_aac -b:a 128k -c:v libx264 -b:v 512K -f flv rtmp://localhost/hls/$name_hi 2>>/tmp/ffmpeg.log;this is the output :
ffmpeg version N-63519-g61917a1 Copyright (c) 2000-2014 the FFmpeg developers
built on May 28 2014 18:06:42 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-x11grab --enable-libvpx --enable-libmp3lame --enable-librtmp --enable-libspeex --enable-libfdk_aac
libavutil 52. 87.100 / 52. 87.100
libavcodec 55. 65.100 / 55. 65.100
libavformat 55. 41.100 / 55. 41.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 5.100 / 4. 5.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
Metadata:
Server NGINX RTMP (github.com/arut/nginx-rtmp-module)
width 1280.00
height 720.00
displayWidth 1280.00
displayHeight 720.00
duration 0.00
framerate 25.00
fps 25.00
videodatarate 390.00
videocodecid 0.00
audiodatarate 27.00
audiocodecid 11.00
Input #0, flv, from 'rtmp://localhost/src/test':
Metadata:
Server : NGINX RTMP (github.com/arut/nginx-rtmp-module)
displayWidth : 1280
displayHeight : 720
fps : 25
profile :
level :
Duration: 00:00:00.00, start: 0.080000, bitrate: N/A
Stream #0:0: Video: h264 (High), yuv420p, 1280x720, 399 kb/s, 25 fps, 25 tbr, 1k tbn, 50 tbc
Stream #0:1: Audio: speex, 16000 Hz, mono, s16, 27 kb/s
[libx264 @ 0x5260380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x5260380] profile High, level 3.1
[libx264 @ 0x5260380] 264 - core 142 r2431 f23da7c - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=24 lookahead_threads=4 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=128 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[libx264 @ 0x525a920] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
Output #0, flv, to 'rtmp://localhost/hls/test_low':
Metadata:
Server : NGINX RTMP (github.com/arut/nginx-rtmp-module)
displayWidth : 1280
displayHeight : 720
fps : 25
profile :
level :
Stream #0:0: Video: h264 (libx264), yuv420p, 1280x720, q=-1--1, 128 kb/s, 25 fps, 90k tbn, 25 tbc
Metadata:
encoder : Lavc55.65.100 libx264
Stream #0:1: Audio: aac (libfdk_aac), 16000 Hz, mono, s16, 32 kb/s
Metadata:
encoder : Lavc55.65.100 libfdk_aac
Output #1, flv, to 'rtmp://localhost/hls/test_mid':
Metadata:
Server : NGINX RTMP (github.com/arut/nginx-rtmp-module)
displayWidth : 1280
displayHeight : 720
fps : 25
profile :
level :
Stream #1:0: Video: h264, yuv420p, 1280x720, q=-1--1, 256 kb/s, 25 fps, 90k tbn, 25 tbc
Metadata:
encoder : Lavc55.65.100 libx264
Stream #1:1: Audio: aac, 16000 Hz, mono, s16
Metadata:
encoder : Lavc55.65.100 libfdk_aac
Output #2, flv, to 'rtmp://localhost/hls/test_hi':
Metadata:
Server : NGINX RTMP (github.com/arut/nginx-rtmp-module)
displayWidth : 1280
displayHeight : 720
fps : 25
profile :
level :
Stream #2:0: Video: h264, yuv420p, 1280x720, q=-1--1, 25 fps, 90k tbn, 25 tbc
Metadata:
encoder : Lavc55.65.100 libx264
Stream #2:1: Audio: aac, 16000 Hz, mono, s16
Metadata:
encoder : Lavc55.65.100 libfdk_aac
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (libspeex -> libfdk_aac)
Stream #0:0 -> #1:0 (h264 -> libx264)
Stream #0:1 -> #1:1 (libspeex -> libfdk_aac)
Stream #0:0 -> #2:0 (h264 -> libx264)
Stream #0:1 -> #2:1 (libspeex -> libfdk_aac)
Error while opening encoder for output stream #1:0 - maybe incorrect parameters such as bit_rate, rate, width or heightI hope you can help me and sorry for my bad english.
Greetz
Kevin
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