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Médias (2)
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SPIP - plugins - embed code - Exemple
2 septembre 2013, par
Mis à jour : Septembre 2013
Langue : français
Type : Image
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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (57)
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Gestion générale des documents
13 mai 2011, parMédiaSPIP ne modifie jamais le document original mis en ligne.
Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...) -
Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)
Sur d’autres sites (7643)
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Why does javaFx run converted mp4 but not original ?
20 février 2020, par bratSimply put, I have this issue where I have a mp4 file with a video. If I run it directly in the code posted here, the window opens but its white/blank. No movie showing.
But if I run the original movie through ffmpeg it works.ffmpeg -i original.mp4 -s hd720 converted.mp4
Note that Im converting from mp4 to mp4, I just change the size to hd720.
So, the question is, why do I need to do that ?My code :
package mypack;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.stage.Stage;
public class MyPlayer extends Application{
public static void main(String[] args) {
launch(args);
}
public void start(Stage primaryStage) throws Exception {
BorderPane content = new BorderPane();
Scene scene = new Scene(content, 540, 209);
primaryStage.setScene(scene);
primaryStage.setScene(scene);
primaryStage.setTitle("Hello Media");
String source;
source = "file:///C:/Users/Noob/Desktop/Movies/original.mp4";
// source = "file:///C:/Users/Noob/Desktop/Movies/converted.mp4";
Media media = new Media(source);
MediaPlayer mediaPlayer = new MediaPlayer(media);
mediaPlayer.setAutoPlay(true);
MediaView mediaView = new MediaView(mediaPlayer);
((BorderPane) scene.getRoot()).getChildren().add(mediaView);
primaryStage.show();
}
}For those audio/video afficionados/ffmpeg pros out there. This is what gets output from the original.
ffprobe -i original.mp4
ffprobe version 4.2.2 Copyright (c) 2007-2019 the FFmpeg developers
built with gcc 9.2.1 (GCC) 20200122
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --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 --enable-libopenmpt
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000029bc02bc540] st: 0 edit list: 1 Missing key frame while searching for timestamp: 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000029bc02bc540] st: 0 edit list 1 Cannot find an index entry before timestamp: 0.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'original.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2020-02-18T17:09:21.000000Z
Duration: 00:00:22.56, start: 0.000000, bitrate: 1631 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 1624 kb/s, 29.97 fps, 29.97 tbr, 29970 tbn, 59.94 tbc (default)
Metadata:
creation_time : 2020-02-18T17:09:21.000000Z
handler_name : Mainconcept MP4 Video Media Handler
encoder : AVC CodingCould it have to do with size ? To big ? Since it sayes 3840x2160 in the original ? And Im making it smaller with hd720 ?
If so, I would expect at least a corner of the movie showing, instead of a totally blank window.
Im new at this, so if you also give some good link to ffmpeg (excluding official manpages) and/or a good tutorial/info page on video formatting pointed towards beginners it would be much appreciated. My understanding this far is there are containers which hold streams and each stream can have different codecs depending on the container. -
How to prevent gray overlays, transparency issues, and similar shader defects when using gl-transition filters
29 janvier 2021, par Soren WrayI compiled and installed a local build of ffmpeg with support for gl-transition adapted from the official guide for Ubuntu. The build is configured with all relevant packages and seems to be working as intended. See the code samples at the end.


I know the gl-transition filter is installed due to
./ffmpeg -v 0 -filters | grep gltransition
, which outputs :

T.. gltransition VV->V OpenGL blend transitions


All sources were tested with the custom command string :
./ffmpeg -i ~/PATH/TO/INPUT1.mp4 -i ~/PATH/TO/INPUT2.mp4 -filter_complex "gltransition=duration=3:offset=1:source=/PATH/TO/EFFECT.glsl" -y ~/PATH/TO/OUTPUT.mp4
, which is for a 3 second transition effect (duration=3
), starting at 1 second (offset=1
).

I've been testing the code sources for various transition effects listed in the gl-transition gallery and have encountered some unusual gray overlays at the transition points, likely having to do with alpha channel transparency. In many cases, there are also shader or animation defects, e.g. with
windowslice.glsl
rendering only 1 slice when there are supposed to be 10, or again withWaterDrop.glsl
, which simply fades out the clip in place of the intended ripple effect. Most complex animations seem to default to this monotonous gray overlay. I provide a gif example below for theGlitchedMemories.glsl
transition.



I couldn't locate any other reports of this particular issue online. The documentation for gl-transitions is sorely lacking and the Stack Exchange network has very little information about this custom filter. I don't know how to fix the problem. It could have something to do with the codec or pixel format used, or some quirk of my build, but the technical details are beyond me.


Please note my compilation and configuration steps, perhaps the error is there :


sudo apt-get update -qq && sudo apt-get -y install autoconf automake build-essential cmake git-core libass-dev libfreetype6-dev libgnutls28-dev libsdl2-dev libtool libunistring-dev libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev libxcb-xfixes0-dev pkg-config texinfo wget yasm zlib1g-dev

mkdir -p ~/ffmpeg_sources ~/bin

sudo apt-get install nasm libx264-dev libx265-dev libnuma-dev libvpx-dev libfdk-aac-dev libmp3lame-dev libopus-dev

cd ~/ffmpeg_sources && wget -O ffmpeg-snapshot.tar.bz2 https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 && tar xjvf ffmpeg-snapshot.tar.bz2

cd ~/ && git clone https://github.com/transitive-bullshit/ffmpeg-gl-transition.git



Open
~/ffmpeg-gl-transition/vf_gltransition.c
in an editor and delete line :# define GL_TRANSITION_USING_EGL // remove this line if you don't want to use EGL


cd ~/ffmpeg_sources/ffmpeg && cp ~/ffmpeg-gl-transition/vf_gltransition.c libavfilter/

git apply ~/ffmpeg-gl-transition/ffmpeg.diff

PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
 --prefix="$HOME/ffmpeg_build" \
 --pkg-config-flags="--static" \
 --extra-cflags="-I$HOME/ffmpeg_build/include" \
 --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
 --extra-libs="-lpthread -lm" \
 --bindir="$HOME/bin" \
 --enable-gpl \
 --enable-opengl \
 --enable-gnutls \
 --enable-libass \
 --enable-libfdk-aac \
 --enable-libfreetype \
 --enable-libmp3lame \
 --enable-libopus \
 --enable-libvorbis \
 --enable-libvpx \
 --enable-libx264 \
 --enable-libx265 \
 --disable-shared \
 --enable-static \
 --enable-runtime-cpudetect \
 --enable-filter=gltransition \
 --extra-libs='-lGLEW -lglfw' \
 --enable-nonfree && \
PATH="$HOME/bin:$PATH" make

source ~/.profile



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