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The Great Big Beautiful Tomorrow
28 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Texte
Autres articles (94)
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Amélioration de la version de base
13 septembre 2013Jolie sélection multiple
Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...) -
Menus personnalisés
14 novembre 2010, parMediaSPIP utilise le plugin Menus pour gérer plusieurs menus configurables pour la navigation.
Cela permet de laisser aux administrateurs de canaux la possibilité de configurer finement ces menus.
Menus créés à l’initialisation du site
Par défaut trois menus sont créés automatiquement à l’initialisation du site : Le menu principal ; Identifiant : barrenav ; Ce menu s’insère en général en haut de la page après le bloc d’entête, son identifiant le rend compatible avec les squelettes basés sur Zpip ; (...) -
Soumettre bugs et patchs
10 avril 2011Un logiciel n’est malheureusement jamais parfait...
Si vous pensez avoir mis la main sur un bug, reportez le dans notre système de tickets en prenant bien soin de nous remonter certaines informations pertinentes : le type de navigateur et sa version exacte avec lequel vous avez l’anomalie ; une explication la plus précise possible du problème rencontré ; si possibles les étapes pour reproduire le problème ; un lien vers le site / la page en question ;
Si vous pensez avoir résolu vous même le bug (...)
Sur d’autres sites (7690)
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DirectShow RTSP SourceFilter with MPEG-4 Video Stream
20 mars 2021, par NovalisI create a simple direct show source filter using FFmpeg.I read rtp packets from RTSP source and give them to decoder. It works for h264 stream.



MyRtspSourceFilter[H264 Stream] ---> h264 Decoder --> Video Renderer




The bad news is that it does not work for MPEG-4. I can able to connect my rtsp source filter with MPEG-Decoder. I got no exception but video renderer does not show anything. Actually just show one frame then nothing [just stop]... Decoders and Renderers are 3rd party so i can not debug them.



MyRtspSourceFilter[MP4 Stream] ---> MPEG-4 Decoder --> Video Renderer




I can able to get rtp packets from MPEG-4 RTSP Source using FFmpeg sucessfully.There is no problem with it.





It seems that i have not set something(?) in my Rtsps Source
 Filter which is not necessary for H264 stream but may be important for
 MPEG-4 stream





What may cause this h264 stream and MPEG-4 stream difference in a direct show rtsp source filter ? Any ideas.



More Info :



— First i try some other rtsp source filters for MPEG-4 Stream...Although my rtsp source is same i see different subtypes in their pin connections.



— Secondly i realy get suspicious if the source is really MPEG-4 SO i check with FFmpeg...FFmpeg gives the source codec id as "CODEC_ID_MPEG4".



Update : 
[ Hack ]



I just set m_bmpInfo.biCompression = DWORD('xvid') it just worked fine...But it is static. How to dynamically get/determine this value using ffmpeg or other ways...


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What's the best FFMPEG method for frequent, automated compilation of timelapse videos ?
5 août 2020, par GoOutsideI have a web application running on a not-particularly beefy Ubuntu Amazon Lightsail instance that uses FFMPEG to build a timelapse video generated from downloaded .jpg webcam photos taken every 2 minutes throughout the day (720 total images each day, which grows throughout the day as new images are downloaded).


The code I'm running every 20 minutes is this :


ffmpeg -y -r 24 -pattern_type glob -I 'picturefolder/*.jpg' -s 1024x576 -vcodec libx264 picturefolder/timelapse.mp4


This mostly works, but it is often quite slow, taking 30-60 seconds to run and getting slower as the day goes on, of course.


Recently, I tried to use
concat
instead ofglob
bing the entire folder over and over. I did not see a noticeable performance improvement, ass it appears theconcat
processes the entire video in order to add even just a few frames to the end of it.

My question for any FFMPEG experts out there : what is the most efficient way to handle this kind of automated timelapse creation, given my setup ? Is there a flag I'm missing ? Perhaps a different, more efficient method ? Or maybe a way to have the FFMPEG process just crawl through this at a more 'slow and steady' pace instead of big bursts of CPU usage.


Or am I stuck with this and should just deal with it ? My ultimate goal would be to continue using my current tier (2 GB RAM, 1 vCPU) without the expense of upgrading. Thank you very kindly for your help !


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ffmpeg How to SCROLL (draw text) on an overlayed image not on the main video
17 juillet 2020, par Tony Hannai want to draw a scrolling text with left and right margin over an OVERLAYED image .. like let's say a BREAKING NEWS Header and then below it the scrolling text.. but i dont want the scrolling to start at the point 0 .. i wanted to be bound by the image overlay position and margins .. i tried this code :


ffmpeg -re -i lethal.mkv -i template.png -filter_complex "[1:v]drawtext =fontsize=24:fontcolor=white:fontfile='arial.ttf':textfile='test.txt':x=w-mod(max(t-1\,0)*(80)\, 2*(tw+100)):y=10[1v];[0:v][1v]overlay=30:30[over]" -map [over] -c:a copy -c:v libx264 -f mpegts udp://224.2.2.1:1234


when i do that .. the text doesn't show .. or i'm guessing it's showing behind the image .. i don't know ! Any help please