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Autres articles (81)
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Demande de création d’un canal
12 mars 2010, parEn fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...) -
Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.
Sur d’autres sites (8979)
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FFMpeg Command work in command line, but not in python script. (Semi Solved)
20 février 2015, par FooldjOkay, kind of a weird problem. But I’m not sure whether it’s python, ffmpeg, or some stupid thing I’m doing wrong.
I’m trying to take a video, and take 1 frame a second, and output that frame to an image. Right now, if i use the command line with ffmpeg :
ffmpeg -i test.avi -r 1 -f image2 image-%3d.jpeg -pix_fmt rgb24 -vcodec rawrvideoIt outputs about 10 images, the images look fine, awesome. Now I have this code (right now some code from some github, as I wanted stuff that i was relatively sure would work, and mine is allll convoluted)
import subprocess as sp
import numpy as np
import re
import cv2
import time
FFMPEG_BIN = r'ffmpeg.exe'
INPUT_VID = 'test.avi'
def getInfo():
command = [FFMPEG_BIN,'-i', INPUT_VID, '-']
pipe = sp.Popen(command, stdout=sp.PIPE, stderr=sp.PIPE)
pipe.stdout.readline()
pipe.terminate()
infos = pipe.stderr.read()
infos_list = infos.split('\r\n')
res = re.search(' \d+x\d+ ',infos)
res = [int(x) for x in res.group(0).split('x')]
return res
res = getInfo()
command = [ FFMPEG_BIN,
'-i', INPUT_VID,
'-f', 'image2pipe',
'-pix_fmt', 'rgb24',
'-vcodec', 'rawvideo', '-']
pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=10**8)
n = 0
im2 = []
try:
mog = cv2.BackgroundSubtractorMOG2(120,2,True)
while True:
raw_image = pipe.stdout.read(res[0]*res[1]*3)
# transform the byte read into a numpy array
image = np.fromstring(raw_image, dtype='uint8')
image = image.reshape((res[1],res[0],3))
rgbImg = image.copy()
fname = ('_tmp%03d.png'%time.time())
cv2.imwrite(fname, rgbImg)
# throw away the data in the pipe's buffer.
#pipe.stdout.flush()
n += 1
print n
except:
print 'done',n
pipe.kill()
cv2.destroyAllWindows()When I run this, I get 10 images, but they all have a Blue Tint ! I cannot for the life of me figure out why. I’ve done tons of searches, I’ve tried quite a few different codecs (usually just messes things up worse). The media info for the video file is here :
General
Complete name : test.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 85.0 KiB
Duration : 133ms
Overall bit rate : 5 235 Kbps
Video
ID : 0
Format : JPEG
Codec ID : MJPG
Duration : 133ms
Bit rate : 1 240 Kbps
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 8 bits
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.135
Stream size : 20.1 KiB (24%)Any suggestions ? It seems like it should be an RGB mixup...just not sure where at...
EDIT : So I fixed the problem by switching the blue and red channels with this code :
bChannel = rgbImg[ :, :,0]
rChannel = rgbImg[ :, :,2]
gChannel = rgbImg[ :, :,1]rgbArray = np.zeros((res[1],res[0],3), 'uint8')
rgbArray[...,0] = rChannel
rgbArray[...,1] = gChannel
rgbArray[...,2] = bChannelSo I guess this is now a question of, why is python mixing up these channels ? Is it a problem with python, or ffmpeg, the codec ?
Thanks !
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Error using javacv library for live streaming camera to server
22 juin 2015, par Prathyush KumarI am new to live-streaming i’m following this link
here for implementing camera streaming to server with ffserver listening onport 8090.But my code breaks at this linepublic void startRecording() {
try {
recorder.start(); //breaks here
startTime = System.currentTimeMillis();
recording = true;
audioThread.start();
} catch (FFmpegFrameRecorder.Exception e) {
e.printStackTrace();
}
}I debugged a little bit to find out what is happening and i found out in this line in
FFmpegFrameRecorder.classif((this.oformat.flags() & 1) == 0) {
AVIOContext pb1 = new AVIOContext((Pointer)null);
if((ret = avformat.avio_open(pb1, this.filename, 2)) < 0) {//throwing exception here
this.release();
throw new Exception("avio_open error() error " + ret + ": Could not open \'" + this.filename + "\'");
}
this.oc.pb(pb1);
}ret is -5 which is less than 0 and so it cannot open the file(rtmp ://live:live@192.168.0.115:8090/live/test.flv).
I am not able to understand whats happening in avformat.class Please help
Is this any configuration problem for ffserver or is it anything else ?I’m not able to figure this out please any help would be greatly appreciated.
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FFMpeg Command work in command line, but in python script the image is blueish ? (Semi Solved)
17 juin 2015, par FooldjOkay, kind of a weird problem. But I’m not sure whether it’s python, ffmpeg, or some stupid thing I’m doing wrong.
I’m trying to take a video, and take 1 frame a second, and output that frame to an image. Right now, if i use the command line with ffmpeg :
ffmpeg -i test.avi -r 1 -f image2 image-%3d.jpeg -pix_fmt rgb24 -vcodec rawrvideoIt outputs about 10 images, the images look fine, awesome. Now I have this code (right now some code from some github, as I wanted stuff that i was relatively sure would work, and mine is allll convoluted)
import subprocess as sp
import numpy as np
import re
import cv2
import time
FFMPEG_BIN = r'ffmpeg.exe'
INPUT_VID = 'test.avi'
def getInfo():
command = [FFMPEG_BIN,'-i', INPUT_VID, '-']
pipe = sp.Popen(command, stdout=sp.PIPE, stderr=sp.PIPE)
pipe.stdout.readline()
pipe.terminate()
infos = pipe.stderr.read()
infos_list = infos.split('\r\n')
res = re.search(' \d+x\d+ ',infos)
res = [int(x) for x in res.group(0).split('x')]
return res
res = getInfo()
command = [ FFMPEG_BIN,
'-i', INPUT_VID,
'-f', 'image2pipe',
'-pix_fmt', 'rgb24',
'-vcodec', 'rawvideo', '-']
pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=10**8)
n = 0
im2 = []
try:
mog = cv2.BackgroundSubtractorMOG2(120,2,True)
while True:
raw_image = pipe.stdout.read(res[0]*res[1]*3)
# transform the byte read into a numpy array
image = np.fromstring(raw_image, dtype='uint8')
image = image.reshape((res[1],res[0],3))
rgbImg = image.copy()
fname = ('_tmp%03d.png'%time.time())
cv2.imwrite(fname, rgbImg)
# throw away the data in the pipe's buffer.
#pipe.stdout.flush()
n += 1
print n
except:
print 'done',n
pipe.kill()
cv2.destroyAllWindows()When I run this, I get 10 images, but they all have a Blue Tint ! I cannot for the life of me figure out why. I’ve done tons of searches, I’ve tried quite a few different codecs (usually just messes things up worse). The media info for the video file is here :
General
Complete name : test.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 85.0 KiB
Duration : 133ms
Overall bit rate : 5 235 Kbps
Video
ID : 0
Format : JPEG
Codec ID : MJPG
Duration : 133ms
Bit rate : 1 240 Kbps
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 8 bits
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.135
Stream size : 20.1 KiB (24%)Any suggestions ? It seems like it should be an RGB mixup...just not sure where at...
EDIT : So I fixed the problem by switching the blue and red channels with this code :
bChannel = rgbImg[ :, :,0]
rChannel = rgbImg[ :, :,2]
gChannel = rgbImg[ :, :,1]rgbArray = np.zeros((res[1],res[0],3), 'uint8')
rgbArray[...,0] = rChannel
rgbArray[...,1] = gChannel
rgbArray[...,2] = bChannelSo I guess this is now a question of, why is python mixing up these channels ? Is it a problem with python, or ffmpeg, the codec ?
Thanks !
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