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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 (68)
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Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
-
Dépôt de média et thèmes par FTP
31 mai 2013, parL’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...)
Sur d’autres sites (10522)
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HEVC with alpha [closed]
3 mai 2024, par foxhableI trying create HEVC with alpha video from png images through ffmpeg.


When i try, it outputs a video that works, has a transparent background and opens in QuickTime, but does not open in Safari. Then i try creating in prores 4444 codec and convert from macOS Context Menu -> Encode Selected Video Files with HEVC 1080p and Preserve Transparency. It has work - video with transparent background, open in QuickTime and in Safari.


So i tried understand what a difference in meta data and only what i find its working video has
HVEC
encoder, but not working hasLavc61.5.103 hevc_videotoolbox
. Can i somehow programmatically or from utilities like ffmpeg create video with HEVC With alpha, which working like from macOS context menu ? macOS context menu doesnt fit because i cant compress or create many videos

Detail info


I have example of working video. Info from ffprobe


ffprobe movie-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\movie-hevc.mov':
 Metadata:
 major_brand : qt
 minor_version : 0
 compatible_brands: qt
 creation_time : 2021-01-02T10:33:38.000000Z
 Duration: 00:00:09.02, start: 0.000000, bitrate: 4053 kb/s
 Stream #0:0[0x1](und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], 4046 kb/s, 60 fps, 60 tbr, 600 tbn (default)
 Metadata:
 creation_time : 2021-01-02T10:33:38.000000Z
 handler_name : Core Media Video
 vendor_id : [0][0][0][0]
 encoder : HEVC



Info about video which i create in prores by ffmpeg command, then convert through macOS context menu


command :


ffmpeg -i a%d.png -r 30 -c:v prores_ks -profile:v 4 -allow_sw 1 -alpha_quality 1 -vtag hvc1 prores.mov



info after converting


ffprobe .\native-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\native-hevc.mov':
 Metadata:
 major_brand : qt
 minor_version : 0
 compatible_brands: qt
 creation_time : 2024-05-03T07:04:26.000000Z
 Duration: 00:00:12.77, start: 0.000000, bitrate: 8796 kb/s
 Stream #0:0[0x1](und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 1920x1920, 8792 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
 Metadata:
 creation_time : 2024-05-03T07:04:27.000000Z
 handler_name : Core Media Video
 vendor_id : [0][0][0][0]
 encoder : HEVC



Info about video which i`m create direct in hevc by ffmpeg command


ffmpeg -i a%d.png -r 30 -c:v hevc_videotoolbox -allow_sw 1 -alpha_quality 1 -vtag hvc1 ffmpeg-hevc.mov



Info :


ffprobe .\ffmpeg-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\ffmpeg-hevc.mov':
 Metadata:
 major_brand : qt
 minor_version : 512
 compatible_brands: qt
 encoder : Lavf61.3.103
 Duration: 00:00:12.77, start: 0.000000, bitrate: 3437 kb/s
 Stream #0:0[0x1]: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bottom coded first (swapped)), 1920x1920, 3435 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : FFMP
 encoder : Lavc61.5.103 hevc_videotoolbox



also i tried :


- 

- props
-allow_sw 0
- get error -alpha-quality 0.75
,-pix_fmt bgra
- safari not open, QT yes, transparent bg- without
-vtag hvc1
- QuickTime cannot open - Tried convert from
webm
tohevc_videotoolbox
- safari not open, QT yes, transparent bg - tried convert
webm
into pngs and inhevc_videotoolbox
- safari not open, QT yes, transparent bg












Tried answers :




mac info :


- 

- macOS Monterey 12.7.2
- Mac mini (Late 2012)
- Core i5 3210M
- Graphics Intel HD 4000










- props
-
Unable to 'make' android ndk project - build fails : [build-openh264-x86] Error 2
18 décembre 2015, par NoobNinjaI’ve attempted these two fixes I’ve found while researching the issue :
android update project --23 --/Users/ajswann/Downloads/android-sdk-macosx
make OS=android NDKROOT=/Users/ajswann/Downloads/android-sdk-macosx TARGET=android-19 ARCH=x86 clean...however neither seems to resolve the issue.
Any input/suggestions are appreciated.
P.S.
I’m running OSX - could this be an issue with attempting to run an x86 architecture on a 64 bit machine ?
Error Message :
chris-mini-mac:linphone-android ajswann$ sudo make
ls: /opt/local/etc/openssl/certs: No such file or directory
/Users/ajswann/Downloads/android-sdk-macosx/tools/android update project --path . --target android-23
Updated project.properties
Updated local.properties
build.xml: Found version-tag: custom. File will not be updated.
Updated file ./proguard-project.txt
It seems that there are sub-projects. If you want to update them
please use the --subprojects parameter.
/Users/ajswann/Downloads/android-sdk-macosx/tools/android update test-project --path tests -m .
Resolved location of main project to: /groupchat/linphone-android/tests
Updated project.properties
Updated local.properties
Updated file tests/proguard-project.txt
Updated ant.properties
/Users/ajswann/Downloads/android-sdk-macosx/tools/android update project --path liblinphone_tester --target android-23
Updated project.properties
Updated local.properties
Updated file liblinphone_tester/proguard-project.txt
ant -e -S clean
Buildfile: /groupchat/linphone-android/build.xml
No sub-builds to iterate on
mkdir -p /groupchat/linphone-android/submodules/externals/openh264/include/wels
rsync -rvLpgoc --exclude ".git" /groupchat/linphone-android/submodules/externals/openh264/codec/api/svc/* /groupchat/linphone-android/submodules/externals/openh264/include/wels/.
building file list ... done
sent 156 bytes received 20 bytes 352.00 bytes/sec
total size is 56216 speedup is 319.41
mkdir -p /groupchat/linphone-android/submodules/externals/build/openh264
mkdir -p /groupchat/linphone-android/submodules/externals/build/openh264/arm
cd /groupchat/linphone-android/submodules/externals/build/openh264/arm \
&& rsync -rvLpgoc --exclude ".git" /groupchat/linphone-android/submodules/externals/openh264/* .
building file list ... done
sent 18841 bytes received 20 bytes 37722.00 bytes/sec
total size is 48272799 speedup is 2559.40
cd /groupchat/linphone-android/submodules/externals/build/openh264/arm && \
make libraries -j4 OS=android ARCH=arm NDKROOT=/Users/ajswann/Downloads/android-ndk-r10e TARGET=android-19
cd ./ && sh ./codec/common/generate_version.sh
Keeping existing codec/common/inc/version_gen.h
mkdir -p /groupchat/linphone-android/submodules/externals/build/openh264
mkdir -p /groupchat/linphone-android/submodules/externals/build/openh264/x86
cd /groupchat/linphone-android/submodules/externals/build/openh264/x86 \
&& rsync -rvLpgoc --exclude ".git" /groupchat/linphone-android/submodules/externals/openh264/* .
building file list ... done
sent 18841 bytes received 20 bytes 12574.00 bytes/sec
total size is 48272799 speedup is 2559.40
cd /groupchat/linphone-android/submodules/externals/build/openh264/x86 && \
make libraries -j4 OS=android ARCH=x86 NDKROOT=/Users/ajswann/Downloads/android-ndk-r10e TARGET=android-19
cd ./ && sh ./codec/common/generate_version.sh
nasm -DX86_32 -f elf -I./codec/common/x86/ -o codec/decoder/core/x86/dct.o codec/decoder/core/x86/dct.asm
codec/decoder/core/x86/dct.asm:1: error: label or instruction expected at start of line
codec/decoder/core/x86/dct.asm:144: error: label or instruction expected at start of line
codec/decoder/core/x86/dct.asm:234: error: symbol `IdctResAddPred_mmx' redefined
codec/decoder/core/x86/dct.asm:262: error: symbol `WelsBlockZero16x16_sse2' redefined
codec/decoder/core/x86/dct.asm:276: error: symbol `WelsBlockZero8x8_sse2' redefined
codec/decoder/core/x86/dct.asm:287: error: label or instruction expected at start of line
make[1]: *** [codec/decoder/core/x86/dct.o] Error 1
make[1]: *** Waiting for unfinished jobs....
Keeping existing codec/common/inc/version_gen.h
make[1]: *** wait: No child processes. Stop.
make: *** [build-openh264-x86] Error 2Source Repository (I simply clone it, add the platform-tools and tools folder from my android-sdk and run ’make’ and I get this error) :
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How to install ffmpeg
9 mars 2016, par user5913892I want to make a "mini" editor video. My goal is, cut some part of the video and then save it and also create an undo button. Now , I was looking for the best solution (This operation have to be done in a website) and I found that I have to use ffmpeg. I didn’t know if ffmpeg was already installed on my server and I use this php script to discover it :
<?php
/**
* Test script for FFmpeg
*
* @author Andycoder /wdevblog.net.ru/>
*/
ini_set('display_errors',1);
error_reporting(E_ALL);
$is_windows = strpos( php_uname(), "Windows" ) !== false;
$ffmpeg_path = !empty( $_POST['ffmpeg_path'] ) && strpos( $_POST['ffmpeg_path'], 'ffmpeg' ) !== false ? trim( $_POST['ffmpeg_path'] ) : '';
if( !$ffmpeg_path && !$is_windows ){
$ffmpeg_path = trim( shell_exec( 'which ffmpeg' ) );
}
function getCodecs( $ffmpeg_path = '' ) {
$lines = array();
$encoders = array();
exec( "{$ffmpeg_path} -codecs", $lines);
foreach ($lines as $line) {
if (preg_match('/^\s+([A-Z .]+)\s+(\w{2,})\s+(.*)$/', $line, $m)) {
$type = trim($m[1]);
if (strpos($type, 'E') !== false) {
$encoder = trim($m[2]);
if (strpos($encoder, ',') !== false) {
foreach (split(',', $encoder) as $e) {
$encoders[] = $e;
}
} else {
$encoders[] = $encoder;
}
}
}
}
sort($encoders);
return $encoders;
}
function getPHPPath(){
$is_windows = strpos( strtolower(php_uname()), 'windows' ) !== false;
if( $is_windows ){
$output = dirname(ini_get('extension_dir')) . "/php.exe";
}else{
$output = trim(shell_exec("which php"));
}
return $output;
}
$info = array();
$info['php_version'] = array( 'name' => 'PHP version', 'value' => phpversion() );
$info['php_path'] = array( 'name' => 'PHP path', 'value' => getPHPPath() );
$info['web_server'] = array( 'name' => 'Web server', 'value' => $_SERVER['SERVER_SOFTWARE'] );
$info['ffmpeg_path'] = array( 'name' => 'FFMPEG path', 'value' => $ffmpeg_path );
$info['ffmpeg_version'] = array( 'name' => 'FFMPEG version', 'value' => '' );
if( $ffmpeg_path ){
$ffmpeg_ver = shell_exec( "{$ffmpeg_path} -version" );
preg_match( '/.+version.+/', $ffmpeg_ver, $matches );
if( !empty( $matches ) ){
$info['ffmpeg_version']['value'] = $matches[0];
}
}
$info['yamdi_path'] = array( 'name' => 'Yamdi path', 'value' => !$is_windows ? trim(shell_exec('which yamdi')) : '' );
$info['mp4box_path'] = array( 'name' => 'MP4Box (GPAC) path', 'value' => !$is_windows ? trim(shell_exec('which MP4Box')) : '' );
$info['qtfaststart_path'] = array( 'name' => 'qt-faststart path', 'value' => !$is_windows ? trim(shell_exec('which qt-faststart')) : '' );
$info['flvtool2_path'] = array( 'name' => 'flvtool2 path', 'value' => !$is_windows ? trim(shell_exec('which flvtool2')) : '' );
$info['ffmpeg_codecs'] = array( 'name' => 'FFMPEG codecs', 'value' => array() );
if( $ffmpeg_path ) {
$info['ffmpeg_codecs']['value'] = getCodecs( $ffmpeg_path );
}
if( empty( $info['ffmpeg_codecs']['value'] ) ){
$info['ffmpeg_path']['value'] = '';
}
ksort($info);
?>
<code class="echappe-js"><script type="text/javascript"><br />
function expandCollapse( id ){<br />
if( document.getElementById(id).style.display == 'none' ){<br />
document.getElementById(id).style.display = 'block';<br />
}else{<br />
document.getElementById(id).style.display = 'none';<br />
}<br />
}<br />
</script>Property Value < ?php foreach( $info as $key => $opt ) : ?>
< ?php echo $opt[’name’] ; ?> : < ?php if( !empty( $opt[’value’] ) ) : ?>
< ?php
if( !is_array( $opt[’value’] ) ) :
echo $opt[’value’] ;
else : ?>< ?php endif ; ?>
< ?php else : ?>
[Not found]
< ?php endif ; ?>< ?php endforeach ; ?>
that return me this :
So, I have not ffmpeg installed on that server. The server should be Linux, I say this because I use one of the many website in Internet to discover it.
I know that the website say that the Webserver is Engine-x, but my company has told that is Apache (as the php script already told me). Now , I found this link http://www.mysql-apache-php.com/ffmpeg-install.htm (in Stackoverflow and many other parts) that say how to install ffmpeg in Linux, but Where should I execute these commands ? Should I use Putty ? or What ?