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Autres articles (9)
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Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
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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 (...) -
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)
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Use ffmpeg to time-dilate and resample audio without changing frequencies
18 mai 2018, par AdisakI have some audio (wave file) that is sampled at a rate of 48000 samples per second.
This audio was created to match a 30 FPS video. However, the video actually plays back on the target at the NTSC framerate of 29.97 (30 X 1000/1001).
This means that I need to time-dilate the audio so that there are 48048 samples where there were previously 48000 samples (it plays back 1.001 times slower) but still maintains that the final audio file’s rate is 48000 samples per second.
Ideally, also, I’d like to do this resample using the sox library option for FFMPEG since I hear it has much higher quality.
Can anyone help me with the command line necessary to process a file in this manner ?
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FFmpeg Multi-Line Commands
31 août 2015, par alr027I’m not really a programmer but I started dabbling with FFmpeg to edit mp4 files and have come across a problem. I’m trying to add an mp3 overlay to an mp4 video with it’s own audio track using FFmpeg. I want to keep the original audio as well as the new one. The only way I found is to strip the audio from the original video, combine it with the mp3 file, and then combine that file back with the mp4 :
ffmpeg -i video.mp4 1.mp3
ffmpeg -i audio.mp3 -i 1.mp3 -filter_complex amerge -c:a libmp3lame -q:a 4 audiofinal.mp3
ffmpeg -i videofinal.mp4 -i audiofinal.mp3 -shortest final.mp4That is a fine way of doing it and it works but I have to run my files back and forth through FFmpeg way too many times. How can I write one text file to run all three of these commands in sequence ?
Also, I’m using Windows.
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Add frame to video in specified position
28 septembre 2015, par QUANGPHAT ĐINHI’m using Aforge libs to read and write video files (the libs is here : http://www.aforgenet.com/framework/features/ffmpeg.html).
Now I want to export a specific frame to edit, then import it back to the video.
I could export frame by frame but I don’t know how to add it back to the video in specific frame. what should i do now ?