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Les Miserables
9 décembre 2019, par
Mis à jour : Décembre 2019
Langue : français
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Mis à jour : Novembre 2019
Langue : français
Type : Video
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Somos millones 1
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Mis à jour : Juin 2015
Langue : français
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Pourquoi Obama lit il mes mails ?
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Mis à jour : Février 2014
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Mis à jour : Octobre 2013
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Type : Image
Autres articles (50)
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Les autorisations surchargées par les plugins
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autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...)
Sur d’autres sites (7899)
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When using youtube-dl with ffmpeg, what merge extension(mkv/mp4) can get best sound quality
16 mars 2021, par jokermeI use youtube-dl -F to display all video/audio list, and choose best video/audio source myself.


Then I use youtube-dl -f [video code]+[audio code] to download and automatically merge them.


As question title, when I use —merge-output-format, what output extension should be chosen then I can get a file with best sound quality. Is mkv ? Or is most suitable merge extension related to the extension of video/audio source ?


By the way, my using player is PotPlayer.


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Normalizing with ffmpeg-normalize, slight variations in sound
20 mai 2022, par Antti RytsöläI have some flacs which I am trying to normalize for Spotify and Distrokid.


I got the guide from this post


ffmpeg-normalize inbound/*.flac -t -14 -lrt 11 -tp -1 -ext flac -c:a flac -of normalized/



Now the problem is ( before submitting to Distrokid ) that when listening to normalized versions there seems to be light deviations, like muffling, to the sound at half a second lenghts.


Small sample, towards the end.


Now I'm asking for help because even though I can try different settings I still want to conform to Spotify normalization guide.


The Spotify guide is as follows :


Target the loudness level of your master at -14dB integrated LUFS 
and keep it below -1dB TP (True Peak) max. This is best for lossy 
formats (Ogg/Vorbis and AAC) and makes sure no extra distortion’s 
introduced in the transcoding process.

If your master’s louder than -14dB integrated LUFS, make sure 
it stays below -2dB TP (True Peak) to avoid extra distortion. This 
is because louder tracks are more susceptible to extra distortion 
in the transcoding process.



and


ffmpeg version N-102727-g580e168a94-tessus
 ffmpeg-normalize v1.22.8





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Merging/concatenating video and keeping sound in R using AV package
30 juin 2022, par Jack CornwallI am trying to merge/concatenate multiple videos with sound sequentially into one video using only R, (I don't want to work with ffmpeg in the command line as the rest of the project doesn't require it and I would rather not bring it in at this stage).


My code looks like the following :


dir<-"C:/Users/Admin/Documents/r_programs/"

videos<-c(
 paste0(dir,"video_1.mp4"),
 paste0(dir,"video_2.mp4"),
 paste0(dir,"video_3.mp4")
)

#encoding
av_encode_video(
 videos,
 output=paste0(dir,"output.mp4"),
 framerate=30,
 vfilter="null",
 codec="libx264rgb",
 audio=videos,
 verbose=TRUE
)



It almost works, the output file is an mp4 containing the 3 videos sequentially one after the other, but the audio present is only from the first of the 3 video and then it cuts off.


It doesn't really matter what the videos are. I have recreated this issue with the videos I was using or even 3 randomly downloaded 1080p 30fps videos from YouTube.


Any help is appreciated & thank you in advance.