
Recherche avancée
Médias (1)
-
Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (37)
-
Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
-
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
Support audio et vidéo HTML5
10 avril 2011MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)
Sur d’autres sites (5346)
-
Révision 23619 : On nécessite PHP 5.4 minimum.
20 juin 2017, par marcimat@rezo.netNote : Debian 7 Wheezy est supportée avec PHP 5.4 jusque fin mai 2018…
-
How to set PSNR value, also what is the minimum PSNR value which shows no visible artifact (no visible distortion)
20 août 2015, par mranaI have 2 issues to ask :
Q# 1. I have resized the video from 1920x1080 to 480:270 (good ratio 16:9) losslessly by the following command :ffmpeg -f rawvideo -pix_fmt yuv422p -s:v 1920x1080 -r 25 -i above_marathon_250.yuv -c:v libx264 -vf scale=480:270 -qp 0 above_marathon_250.mp4
Once i am trying to find the PSNR value using the following command :ffmpeg -f rawvideo -pix_fmt yuv422p -s:v 1920x1080 -r 25 -i above_marathon_250.yuv -i above_marathon_250.mp4 -lavfi psnr -f null -
I am getting the following problem : https://www.dropbox.com/s/h2djohk3d3q6uj6/Screen%20Shot%202015-08-20%20at%2018.43.24.png?dl=0Q# 2. What is the minimum value of PSNR for no visible artifact(no visible distortion), and how can i set it with the above command ?
Thanks so much.
-
ffmpeg fails to copy correct duration
2 février 2016, par guneykayimI want to trim a video with the following command :
ffmpeg.exe -i in.mp4 -ss 76 -t 10 -c copy -an out.mp4
which exactly means, copy 10 seconds after 76 seconds, and don’t copy audio. However
out.mp4
is 5 seconds length.This is ffmpeg console output :
ffmpeg.exe -i in.mp4 -ss 76 -t 10 -c copy -an out.mp4
ffmpeg version N-78197-g5893e87 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.2.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzli
b --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu
ray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab
le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger
--enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena
ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --en
able-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --
enable-lzma --enable-decklink --enable-zlib
libavutil 55. 16.101 / 55. 16.101
libavcodec 57. 22.102 / 57. 22.102
libavformat 57. 23.101 / 57. 23.101
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 27.100 / 6. 27.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.63.104
Duration: 00:02:28.54, start: 0.000000, bitrate: 2018 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1056 [SAR 1:1 DAR 20:11]
, 1887 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default
)
Metadata:
handler_name : SoundHandler
Output #0, mp4, to 'out.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.23.101
Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1056 [SAR 1:1 DAR 20:11],
q=2-31, 1887 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 90k tbc (default)
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame= 143 fps=0.0 q=-1.0 Lsize= 1502kB time=00:00:09.96 bitrate=1235.5kbits/s speed= 524x
video:1499kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.194616%When I analyze this console output I see this inconsistency. It says output time is
9.96 seconds
. On the other hand it saysframe is 143
, so from the latter information I can calculateduration
byframe/fps
which is143/23.98=5.96
.Another strange behaviour with this copy command is when I change the start time to something else output video length is varying between 5-10 seconds depending on the start time.
What might be the problem causing these unexpected behaviours ?