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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (50)
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Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
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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Give a video rounded transparent edges so that it can be overlayed on another video using FFMPEG
15 octobre 2020, par Kevin JastiIm trying to overlay a smaller video (200x200)on top of a bigger video (800x800).



I've used the FFMPEG overlay filter to achieve this



ffmpeg -i big.mp4 -vf "movie=small.mkv[clip2]; [in][clip2] overlay=1:5 [out]" final.mp4




Challenge is that the smaller video needs its edges to be rounded.
I have tried working with alphaextract and alphamerge. The documentation on FFMPEG is sparse and im not sure how to go about it.


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Give a video rounded transparent edges so that it can be overlayed on another video using FFMPEG
30 septembre 2015, par Kevin JastiIm trying to overlay a smaller video (200x200)on top of a bigger video (800x800).
I’ve used the FFMPEG overlay filter to achieve this
ffmpeg -i big.mp4 -vf "movie=small.mkv[clip2]; [in][clip2] overlay=1:5 [out]" final.mp4
Challenge is that the smaller video needs its edges to be rounded.
I have tried working with alphaextract and alphamerge. The documentation on FFMPEG is sparse and im not sure how to go about it. -
FFMPEG Adding intro video and scaling it to the original video
10 octobre 2019, par QuestionsI have one intro video of fixed resolution, 1920x1080, and main videos with different resolutions. I could merge the videos using the following command
ffmpeg -i intro.mp4 -i main.mp4 -i intro.mp4 -filter_complex " \
[0:v]scale=640x352,setsar=sar=16/9[intro]; \
[1:v]scale=640x352,setsar=sar=16/9[video]; \
[2:v]scale=640x352,setsar=sar=16/9[outro]; \
[intro][video][outro]concat=n=3[output]; \
[0:a][1:a] acrossfade=d=1 [audio]" \
-vcodec libx264 -map "[output]" -map "[audio]" "main__.mp4"This works perfectly if I specify the scales manually. But this doesn’t work for portrait videos which has resolution of 640x352 with rotation of -90 degrees, when I check them with ffprobe.
Is there a way to scale the intro video dynamically to match the dimensions of the main video ? It’s fine if the intro video’s aspect ratio is distorted, and just retain the main video’s size.