
Recherche avancée
Autres articles (35)
-
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 (...) -
Taille des images et des logos définissables
9 février 2011, parDans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...) -
Gestion de la ferme
2 mars 2010, parLa ferme est gérée dans son ensemble par des "super admins".
Certains réglages peuvent être fais afin de réguler les besoins des différents canaux.
Dans un premier temps il utilise le plugin "Gestion de mutualisation"
Sur d’autres sites (5283)
-
Convert form 30 to 60fps by increasing speed, not duplicating frames. FFmpeg
14 janvier 2014, par Matt PellegriniI have a video that is incorrectly labelled at 30fps, it is actually 60fps and so looks like it's being played at half speed. The audio is fine, that is, the soundtrack finishes half way through the video clip. I'd like to know how, if possible to fix this, that is double the video speed, making it 60fps and meaning that the audio and video are synced.
The file is H.264 and the audio MPEG-4 AAC
Thanks in advance for any help,
Matt
File details as given by ffmpeg, as requested :
ffmpeg version 0.8.9-6:0.8.9-0ubuntu0.13.10.1, Copyright (c) 2000-2013 the Libav developers
built on Nov 9 2013 19:09:46 with gcc 4.8.1
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './Tignes60fps.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2014-01-13 02:23:09
Duration: 00:08:33.21, start: 0.000000, bitrate: 5690 kb/s
Stream #0.0(eng): Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 5609 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
Metadata:
creation_time : 2014-01-13 02:23:09
Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 156 kb/s
Metadata:
creation_time : 2014-01-13 02:23:09
At least one output file must be specified -
ffmpeg 'or' filter - what's the significance of red and blue ?
9 juillet 2020, par BETLOGI'm tinkering with various ffmpeg filters to help me visualise the magnitude of difference certain presets use, and I notice a couple of filters display a lot of certain primary colours.
Specifically in this case : red and blue in an 'or' filter, and green in an 'and' filter.


It seems useful to be able to tell WHICH input is being indicated, or to understand how the filters act in terms of sequence, and I'm hoping these colourations will help with this.
Or at least I'd like to better understand whatever they do represent.


In the screenshot of the video segment above I see pure red and blue occasionally featuring strongly, and as the two extremes in the RgB palette it logically seems (and I'm hoping) they might indicate particular video inputs.
Similarly, the 'and' filter shows a lot of green shades, so I'm hoping someone can explain the meaning of the R,G, and B highlights in the 'or' and the 'and' filters.


The relevant input and preset info in the images below is at the extreme left and right of each drawtext line.






-
Convert form 30 to 60fps by increasing speed, not duplicating frames, using FFmpeg
12 août 2018, par Matt PellegriniI have a video that is incorrectly labelled at 30fps, it is actually 60fps and so looks like it’s being played at half speed. The audio is fine, that is, the soundtrack finishes half way through the video clip. I’d like to know how, if possible to fix this, that is double the video speed, making it 60fps and meaning that the audio and video are synced.
The file is H.264 and the audio MPEG-4 AAC.
File details as given by ffmpeg, as requested :
ffmpeg version 0.8.9-6:0.8.9-0ubuntu0.13.10.1, Copyright (c) 2000-2013 the Libav developers
built on Nov 9 2013 19:09:46 with gcc 4.8.1
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './Tignes60fps.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2014-01-13 02:23:09
Duration: 00:08:33.21, start: 0.000000, bitrate: 5690 kb/s
Stream #0.0(eng): Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 5609 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
Metadata:
creation_time : 2014-01-13 02:23:09
Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 156 kb/s
Metadata:
creation_time : 2014-01-13 02:23:09
At least one output file must be specified