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Somos millones 1
21 juillet 2014, par
Mis à jour : Juin 2015
Langue : français
Type : Video
Autres articles (57)
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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 -
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 (...)
Sur d’autres sites (9947)
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avcodec_decode_video2 returns positive number when got_picture_ptr is 0
22 août 2017, par dafnahaktanaAccording to the documentation : here,
avcodec_decode_video2
should return 0 if no frame could be decompressed. Thegot_picture_ptr
should also be set to zero if no frame could be decompressed.I ran this function on a h264 video and I got positive return value while the
got_picture_ptr
was set to 0. Maybe that the documentation is not updated ? -
ImageMagick to crop image based on based on rectangular border color
3 septembre 2021, par Alvie MahmudI have some images that I would like to crop but hopefully via command line rather than doing each one manually.


I would like to crop the image (I've cropped top half, desaturated other colours and split frames with ffmpeg) based on where there is a border of a certain color (#31393C in this case). For example, I would like this image :


to be cropped like this :



I have tried some commands but they aren't working for me unfortunately.


convert image.jpg -bordercolor "#31393C" -border 2x2 -fuzz 10% -trim output.jpg



I have also tried to make the parts that aren't #31393C to be filled with white and then cropping which may potentially work as a solution as I want to improve the ability to use OCR :


convert image.jpg -fill white -fuzz 11% +opaque "#31393c" result.jpg
convert result.jpg -bordercolor white -border 10x10 -fuzz 10% -trim output.jpg



which works somewhat but not perfectly :



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FFMPEG showaves with both color and colorkey
22 mars 2018, par fab23I’m actually using this shell code to generate a video with black waveforms over a background image with FFMPEG :
ffmpeg -y -i $local_mp3 -loop 1 -i $local_image -filter_complex "[0:a]showwaves=s=1280x720:mode=line,colorkey=0x000000:0.01:0.1,format=yuva420p[v];[1:v][v]overlay[outv]" -map "[outv]" -map 0:a -vcodec libx264 -pix_fmt yuv420p -profile:v main -level 4.0 -acodec aac -strict -2 -shortest -movflags +faststart output.mp4
I just looking how to give a different color to the waveforms. I tried a lot and I’m still stuck after decades :)