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Autres articles (111)
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Script d’installation automatique de MediaSPIP
25 avril 2011, parAfin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
La documentation de l’utilisation du script d’installation (...) -
Que fait exactement ce script ?
18 janvier 2011, parCe script est écrit en bash. Il est donc facilement utilisable sur n’importe quel serveur.
Il n’est compatible qu’avec une liste de distributions précises (voir Liste des distributions compatibles).
Installation de dépendances de MediaSPIP
Son rôle principal est d’installer l’ensemble des dépendances logicielles nécessaires coté serveur à savoir :
Les outils de base pour pouvoir installer le reste des dépendances Les outils de développements : build-essential (via APT depuis les dépôts officiels) ; (...) -
Automated installation script of MediaSPIP
25 avril 2011, parTo overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
The documentation of the use of this installation script is available here.
The code of this (...)
Sur d’autres sites (9708)
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save caca (ascii video) to an mp4 video [on hold]
8 juillet 2013, par user2559158No problems viewing a caca file from mplayer (mplayer -vo caca), and it's also possible view the video file as caca with ffmpeg (fmpeg -i file.mp4 -f caca -pix_fmt rgb24 outputfile.mp4), but neither saves the file. Is there anyway to do it ?
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ffmpeg pass through video including Dolby Video
11 janvier 2024, par cmjordanGiven media that contains a video stream that includes Dolby Vision as one of the HDR metadata, how does one transcode the media and maintain the video stream as is (including the Dolby Vision and any other HDR metadata) ?


Sample media
mediainfo
excerpt :

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5@High
HDR format : Dolby Vision, Version 1.0, dvhe.08.06, BL+RPU, HDR10 compatible / SMPTE ST 2094 App 4, Version 1, HDR10+ Profile B compatible
Codec ID : V_MPEGH/ISO/HEVC
...



-c:v:0 copy
drops the Dolby Vision metadata from this and retains only the latter HDR metadata.

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Poor video quality in first few frames using video output options in gganimate
27 janvier 2021, par NauticaI'm trying to export some animations I've made using gganimate through video format as the gifs I'm creating are quite large.


Sample code :


library(gganimate)

p <- ggplot(mtcars, aes(factor(cyl), mpg)) +
 theme_dark() +
 theme(panel.grid = element_line(colour = "white")) +
 geom_boxplot() +
 transition_states(
 gear,
 transition_length = 2,
 state_length = 1
 ) +
 enter_fade() +
 exit_shrink() +
 ease_aes('sine-in-out')

anim_save("example.mp4",
 animate(
 p,
 nframes = 450,
 fps = 25,
 width = 1280,
 height = 720,
 type = "cairo",
 start_pause = 50,
 end_pause = 50,
 renderer = av_renderer()
 ))



Produces the video seen here : https://vimeo.com/505019987


With the standard ggplot2 theme : https://vimeo.com/505020822


This is another example of something I made using gganimate : https://www.youtube.com/watch?v=fHzjl_z_sSo


You can see that the video quality in the first few frames are very bad. In the video with the standard ggplot2 theme and the YouTube video, the gridlines and watermark text are not visible at the start but fade in much later. I don't know much about video codecs but I assume it has something to do with the ffmpeg library the
av
package/av_renderer()
is using. Has anyone experienced something like this ?