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Carte de Schillerkiez
13 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (76)
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Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
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
Sur d’autres sites (10179)
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Revision 86910 : le plug est pour spip 3.0 / 3.1 donc : Ajout de la borne mini pour ...
29 décembre 2014, par spip.franck@… — Logle plug est pour spip 3.0 / 3.1 donc :
Ajout de la borne mini pour l’utilise de forum qui était absente (1.8.12 est la version natif à spip 3.0.0)
Le necessite de facteur de peut être plus petit que 3.0.19 car il faut une borne supportant spip 3.0 mais aussi 3.1 -
Revision 86910 : le plug est pour spip 3.0 / 3.1 donc : Ajout de la borne mini pour ...
29 décembre 2014, par spip.franck@… — Logle plug est pour spip 3.0 / 3.1 donc :
Ajout de la borne mini pour l’utilise de forum qui était absente (1.8.12 est la version natif à spip 3.0.0)
Le necessite de facteur de peut être plus petit que 3.0.19 car il faut une borne supportant spip 3.0 mais aussi 3.1 -
ffmpeg convert variable framerate .webm to constant framerate video
4 novembre 2019, par DashadowerI have a .webm file of a recording of a game at 16fps. However, upon trying to process the video with OpenCV, it seems the video is recorded with a variable framerate, so when I try to use OpenCV to get a frame every second by getting the every 16th frame, it won’t work since the video stream will end prematurely.
Therefore, I’m trying to convert a variable-frame .webm video, which claims it has a framerate of 16 fps, to a video with a constant frame, so I can extract one frame for every second. I’ve tried the following ffmpeg command from https://ffmpeg.zeranoe.com/forum/viewtopic.php?t=5518 :
ffmpeg -i input.webm -c:v copy -b:v copy -r 16 output.webm
However, the following error will occur :
[NULL @ 00000272ccbc0c40] [Eval @ 000000bc11bfe2f0] Undefined constant or missing '(' in 'copy'
[NULL @ 00000272ccbc0c40] Unable to parse option value "copy"
[NULL @ 00000272ccbc0c40] Error setting option b to value copy.
Error setting up codec context options.Here’s is the code I’m trying to use to process a frame every second :
video = cv2.VideoCapture(test_mp4_vod_path)
print("Opened ", test_mp4_vod_path)
print("Processing MP4 frame by frame")
# forward over to the frames you want to start reading from.
# manually set this, fps * time in seconds you wanna start from
video.set(1, 0)
success, frame = video.read()
#fps = int(video.get(cv2.CAP_PROP_FPS)) # this will return 0!
fps = 16 # hardcode fps
total_frame_count = int(video.get(cv2.CAP_PROP_FRAME_COUNT))
print("Loading video %d seconds long with FPS %d and total frame count %d " % (total_frame_count/fps, fps, total_frame_count))
count = 1
while video.isOpened():
success, frame = video.read()
if not success:
break
if count % fps == 0:
print("%dth frame is %d seconds on video"%(count, count/fps))
count += 1The code will finish before it gets near the end of the video, since the video isn’t at a constant FPS.
How can I convert a variable-FPS video to a constant FPS video ?