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Autres articles (112)
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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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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 -
MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)
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Having trouble obtaining the time from RTP Timestamps obtained through OpenCV
24 août 2019, par Fr0styI am finding it a bit difficult trying to understand whether or not the hack around with FFmpeg and OpenCV really provided a RTP timestamp. My last post helped a little bit but got me stuck in trying to validate the timestamps obtained through this work around by modifying ffmpeg and opencv.
FFmpeg version : 4.1.0
OpenCV version : 3.4.1import cv2
import time
from datetime import datetime, date
uri = 'rtsp://admin:password@192.168.1.66:554/Streaming/Channels/101'
cap = cv2.VideoCapture(uri)
'''One is the offset between the two epochs. Unix uses an epoch located at 1/1/1970-00:00h (UTC) and NTP uses 1/1/1900-00:00h.
This leads to an offset equivalent to 70 years in seconds (there are 17 leap years between the two dates so the offset is'''
time_offset = 2208988800 # (70*365 + 17)*86400 = 2208988800 (in seconds)
# offset = 3775484294
days = 43697
pdat = "1900-01-01 00:00:00:00"
mdat = "2019-08-23 22:02:44:00" # str(datetime.now()) + str(datetime.now().time())
pdate = datetime.strptime(pdat, "%Y-%m-%d %H:%M:%S:%f").date()
mdate = datetime.strptime(mdat, "%Y-%m-%d %H:%M:%S:%f").date()
delta = (mdate - pdate).days
offset = delta * 86400
def time_delta(s):
return (s - time_offset)
while True:
frame_exists, curr_frame = cap.read()
if frame_exists:
seconds = cap.getRTPTimeStampSeconds()
fraction = cap.getRTPTimeStampFraction()
timestamp = cap.getRTPTimeStampTs()
unix_offset = seconds - time_offset
msec = int((int(fraction) / 0xFFFFFFFF) * 1000.0)
ts = float(str(unix_offset) + "." + str(msec))
# print("Timestamp per Frame:%i" % timestamp)
print((datetime.fromtimestamp(float(ts) + offset)))
cap.release()My Output :
On August 23, 2019 at 22:02
...
2019-08-23 13:59:52.781000
2019-08-23 13:59:52.726000
2019-08-23 13:59:52.671000
2019-08-23 13:59:52.616000
2019-08-23 13:59:52.561000
2019-08-23 13:59:52.506000
2019-08-23 13:59:52.451000
2019-08-23 13:59:52.396000
2019-08-23 13:59:52.342000
2019-08-23 13:59:52.287000
2019-08-23 13:59:52.232000
2019-08-23 13:59:52.177000
2019-08-23 13:59:52.122000
2019-08-23 13:59:52.067000
2019-08-23 13:59:52.012000
2019-08-23 13:59:53.570000
2019-08-23 13:59:53.020000
2019-08-23 13:59:53.847000
2019-08-23 13:59:53.792000I’ve noticed how the time increments weirdly (that’s not suppose to happen in the real, current time), such as the last two lines and a few others in between in the output. A bit flabbergasted as to what went wrong. Also trying this out on multiple IP cameras, with each showing a different timestamp probably related to when they were turned on.
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RTP Timestamps Are Not Monotonically increasing
25 août 2019, par Fr0styI am finding it a bit difficult trying to understand whether or not the hack around with FFmpeg and OpenCV really provided a RTP timestamp. My last post helped a little bit but got me stuck in trying to validate the timestamps obtained through this work around by modifying ffmpeg and opencv.
FFmpeg version : 4.1.0
OpenCV version : 3.4.1import cv2
import time
from datetime import datetime, date
uri = 'rtsp://admin:password@192.168.1.66:554/Streaming/Channels/101'
cap = cv2.VideoCapture(uri)
'''One is the offset between the two epochs. Unix uses an epoch located at 1/1/1970-00:00h (UTC) and NTP uses 1/1/1900-00:00h.
This leads to an offset equivalent to 70 years in seconds (there are 17 leap years between the two dates so the offset is'''
time_offset = 2208988800 # (70*365 + 17)*86400 = 2208988800 (in seconds)
# offset = 3775484294
days = 43697
pdat = "1900-01-01 00:00:00:00"
mdat = "2019-08-23 22:02:44:00" # str(datetime.now()) + str(datetime.now().time())
pdate = datetime.strptime(pdat, "%Y-%m-%d %H:%M:%S:%f").date()
mdate = datetime.strptime(mdat, "%Y-%m-%d %H:%M:%S:%f").date()
delta = (mdate - pdate).days
offset = delta * 86400
def time_delta(s):
return (s - time_offset)
while True:
frame_exists, curr_frame = cap.read()
if frame_exists:
seconds = cap.getRTPTimeStampSeconds()
fraction = cap.getRTPTimeStampFraction()
timestamp = cap.getRTPTimeStampTs()
unix_offset = seconds - time_offset
msec = int((int(fraction) / 0xFFFFFFFF) * 1000.0)
ts = float(str(unix_offset) + "." + str(msec))
# print("Timestamp per Frame:%i" % timestamp)
print((datetime.fromtimestamp(float(ts) + offset)))
cap.release()My Output :
On August 23, 2019 at 22:02
...
2019-08-23 13:59:52.781000
2019-08-23 13:59:52.726000
2019-08-23 13:59:52.671000
2019-08-23 13:59:52.616000
2019-08-23 13:59:52.561000
2019-08-23 13:59:52.506000
2019-08-23 13:59:52.451000
2019-08-23 13:59:52.396000
2019-08-23 13:59:52.342000
2019-08-23 13:59:52.287000
2019-08-23 13:59:52.232000
2019-08-23 13:59:52.177000
2019-08-23 13:59:52.122000
2019-08-23 13:59:52.067000
2019-08-23 13:59:52.012000
2019-08-23 13:59:53.570000
2019-08-23 13:59:53.020000
2019-08-23 13:59:53.847000
2019-08-23 13:59:53.792000I’ve noticed how the time increments weirdly (that’s not suppose to happen in the real, current time), such as the last two lines and a few others in between in the output. A bit flabbergasted as to what went wrong. Also trying this out on multiple IP cameras, with each showing a different timestamp probably related to when they were turned on.
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Why can't my python project find ffmpeg even though it's installed in the Python library ?
20 octobre 2024, par Jieyu ZhangI am encountering an issue where my project cannot find ffmpeg, even though it is installed in the Python library. Here are the details :


When running the script, I get the following error message:

D:\Python\Lib\site-packages\pydub\utils.py:170: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
 warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)
Additionally, I receive this error message when trying to prepare the dataset:



from pydub import AudioSegment
import os


# Specify the path to ffmpeg
ffmpeg_path = "D:\\Python-code\\ffmpeg-master-latest-win64-gpl\\bin\\ffmpeg.exe"
AudioSegment.ffmpeg = ffmpeg_path

def convert_flac_to_wav(flac_file, wav_file):
 sound = AudioSegment.from_file(flac_file, format="flac")
 sound.export(wav_file, format="wav")

if __name__ == "__main__":
 # Get the current working directory
 current_dir = os.getcwd()
 print(f"Current directory: {current_dir}")

 # Get the parent directory of the current working directory
 root_dir = os.path.dirname(current_dir)
 print(f"Root directory: {root_dir}")

 # Construct the path
 voice_wavs = os.path.join(root_dir, 'data', 'voice', 'wav')
 print(f"Voice WAVs directory: {voice_wavs}")

 # Ensure the directory exists
 if not os.path.exists(voice_wavs):
 os.makedirs(voice_wavs)
 print(f"Created directory: {voice_wavs}")
 else:
 print(f"Directory exists: {voice_wavs}")

 # Get all .flac files
 # Ensure .flac files are located in the current working directory
 flac_files = [f for f in os.listdir(current_dir) if f.endswith('.flac')]
 print(f"FLAC files found: {flac_files}")

 # Convert each .flac file
 for flac_file in flac_files:
 input_flac = os.path.join(current_dir, flac_file)
 output_wav = os.path.join(current_dir, flac_file.replace('.flac', '.wav'))
 convert_flac_to_wav(input_flac, output_wav)



Despite these steps, the project continues to report that ffmpeg cannot be found. Could someone help me identify what might be causing this issue and how to resolve it ?


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