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Autres articles (82)
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Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
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MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Ecrire une actualité
21 juin 2013, parPrésentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
Vous pouvez personnaliser le formulaire de création d’une actualité.
Formulaire de création d’une actualité Dans le cas d’un document de type actualité, les champs proposés par défaut sont : Date de publication ( personnaliser la date de publication ) (...)
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How to extract a video snippet from a video file that is being written in by ffmpeg in realtime
26 février 2015, par alex.bAt the moment i am recording a LIVE stream video from youtube with youtube-dl (https://github.com/rg3/youtube-dl)
The command i use for this :
youtube-dl --id -f 92 https://www.youtube.com/watch?v=VYlQJbsVs48
92 is a format code that i got after executing a command to get the formats, that gave me this list :
format code extension resolution note
140 m4a audio only DASH audio 144k , m4a_dash container, aac @128k (48000Hz)
141 m4a audio only DASH audio 272k , m4a_dash container, aac @256k (48000Hz)
160 mp4 256x144 DASH video 124k , 15fps, video only
133 mp4 426x240 DASH video 258k , 30fps, video only
134 mp4 640x360 DASH video 616k , 30fps, video only
135 mp4 854x480 DASH video 1116k , 30fps, video only
136 mp4 1280x720 DASH video 2216k , 30fps, video only
137 mp4 1920x1080 DASH video 4141k , 30fps, video only
151 mp4 72p HLS
132 mp4 240p HLS
92 mp4 240p HLS
93 mp4 360p HLS
94 mp4 480p HLS
95 mp4 720p HLS
96 mp4 1080p HLS (best)This is creating a file called VYlQJbsVs48.mp4.part that gets bigger and bigger of course.
Is there a way to extract a video snippet from that live stream or form the part file ? Or maybe there is a better way of doing this ?
What i have noticed is that if i force quit iTerm2 while youtube-dl is running the .part file it creates wont contain any index information (something to do with an moov atom not being present in the mp4 file - which is the information about the number of frames and other things - metadata i think), so it makes me think i cannot extract from the file.
Maybe if there would be a way that youtube-dl can write the index information at all times or maybe another way that i can record the live stream and get video snippets while its recording.
I forgot to mention i am doing this on OSX Yosemite. I have FFMPEG installed with homebrew and youtoube-dl
I am more than happy to try stuff on UBUNTU if there is a solution.
Any help would be greatly appreciated.
Thank you.
Alex
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FFMPEG Overlay video on top of another video
19 mai 2014, par James Blackbj BlackburnI have looked through all the questions on this on stackoverflow but none of the answers worked for me.
I have a screen recorded video in mp4 and another video recorded from a webcam in mp4. I want to overlay the webcam video over the top left of the screen recorded video.
I think I finally found the right command line for doing this but when I step through the ffmpeg process it freezes when it reaches " handler_name :SoundHandler".
Here is my command line :
string overlayPosition = "movie=" + '"' + _videoFile.FileName + '"' + "[inner]; [in][inner] overlay [out]";
string overLayCommand = "-i " + '"' + videoList[0].Path + '"' + " -vf " + '"' + overlayPosition + '"' + + '"' + " C:\\Users\\james\\output.mp4" + '"';Does anyone know what I am doing wrong ? I’ve managed to trim audio and video, crop video, join sound, join video, and join sound and video but cannot get overlay to work :(.
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When NVIDIA GPU is used for H265 video decoding acceleration, the video screen may skip forward frames, while AMD GPU does not [closed]
16 août 2023, par uproarWe are using NVIDIA GPUs (model : GTX1050TI) to accelerate H.265 video decoding and rendering, and DXVA2 hardware acceleration is used. The version of FFmpeg is 4.2.2.
If the video is played for a long time, there will be frame skipping forward (that is, the video frame of the first few seconds will appear when it is played in normal order), and it will always exist after it appears, and it will not heal itself.
Has anyone been in the same situation or can anyone help ?


We checked the rendering and playback timing of each frame and found that no forward jump occurred. Therefore, the data decoded by the GPU may be incorrect.
We also used AMD GPUs for comparison tests, but this is not the case with AMD GPUs.