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• Sending keystrokes to subprocess using Python's popen

  10 avril 2018, par Paul Vincent Craven

  I have a Python 3.6 program that is calling ffplay from the ffmpeg library using the Popen command.

  I want to send ffplay keystrokes so I can control the playback. But nothing seems to happen. Take this example :

  import subprocess
  
  import time
  
  
  
  # Array with the command in it
  
  my_command = ("ffplay", "-nodisp", "-autoexit", "examples/sounds/Fantascape_Looping.mp3")
  
  
  
  # Open a subprocess
  
  my_subprocess = subprocess.Popen(my_command, 
  
                                   stdin=subprocess.PIPE, 
  
                                   stdout=subprocess.PIPE, 
  
                                   stderr=subprocess.PIPE)
  
  
  
  # Wait 2 seconds
  
  time.sleep(2)
  
  
  
  # Try to send an escape:
  
  print("Attempt to send and 'escape' to stop the sound")
  
  my_subprocess.stdin.write(b'\x1b')
  
  
  
  # Wait and see what happens
  
  print("Should no longer hear anything")
  
  time.sleep(5)

  I hear music for 7 seconds, rather than 2 seconds. What is wrong with the code ?

• Révision 19068 : #2548 : spip_sqlite_quote ne doit pas finir sur _q qui fait un addslashes :

  5 mars 2012, par cedric -

  "addslashes() should NOT be used to quote your strings for SQLite queries ; it will lead to strange results when retrieving your data." selon http://php.net/manual/en/function.sqlite-escape-string.php idem pour _spip_calculer_cite

• moviepy VideoFileClip IndexError : list index out of range, OSError : MoviePy error : failed to read the duration of file

  21 mai 2022, par Mohamed Medhat

  We are recording videos from the browser with the following encoding
'video/webm ; codecs="vp8, opus"', then we upload these videos to an AWS S3 bucket.
Our ML model works on these videos, and one of the models needs to extarct the audio and process it.
Here is a code snapit for extracting the audio

  


  import speech_recognition as sr
import moviepy.editor as me
from denoise2 import denoise
from sentence_transformers import SentenceTransformer
from sklearn.metrics.pairwise import cosine_similarity
import math

model_name = 'bert-base-nli-mean-tokens'
model = SentenceTransformer(model_name)


class recomm:
    y = 0.0

    def __init__(self, path, keywords):
        video_clip = me.VideoFileClip(r"{}".format(path))
        path2 = "y2.wav"
        video_clip.audio.write_audiofile(r"{}".format(path2), nbytes=2)
        recognizer = sr.Recognizer()
        """a = AudioSegment.from_wav(path2)
        a = a + 5
        a.export(path2, "wav")"""
        audio_clip = sr.AudioFile("{}".format(path2))
        with audio_clip as source:
            audio_file = recognizer.record(source)
        sent = []
        result = ""
        try:
            result = recognizer.recognize_google(audio_file)
        except sr.UnknownValueError:
            print("Can not process audio ")
        if not result:
            self.y = 0
        else:
            print(result)
            sent.append(result)
            sent = sent + keywords
            sent_vec3 = model.encode(sent)
            x = cosine_similarity(
                [sent_vec3[0]],
                sent_vec3[1:]
            )
            for i in range(len(x)):
                self.y = self.y + x[0][i]
            self.y = (self.y / (len(sent) - 1)) * 1000.0

    def res(self):
        if self.y < 0:
            self.y = 0
        return self.y


  


  And that's the traceback,
the error occurred at this line

  


  video_clip = me.VideoFileClip(r"{}".format(path))


  


  Traceback (most recent call last):
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/moviepy/video/io/ffmpeg_reader.py", line 286, in ffmpeg_parse_infos
match = re.findall("([0-9][0-9]:[0-9][0-9]:[0-9][0-9].[0-9][0-9])", line)[0]
IndexError: list index out of range

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "main.py", line 90, in
main()
File "main.py", line 85, in main
interviews_channel.start_consuming()
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/pika/adapters/blocking_connection.py", line 1865, in start_consuming
self._process_data_events(time_limit=None)
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/pika/adapters/blocking_connection.py", line 2026, in _process_data_events
self.connection.process_data_events(time_limit=time_limit)
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/pika/adapters/blocking_connection.py", line 833, in process_data_events
self._dispatch_channel_events()
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/pika/adapters/blocking_connection.py", line 567, in _dispatch_channel_events
impl_channel._get_cookie()._dispatch_events()
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/pika/adapters/blocking_connection.py", line 1492, in _dispatch_events
consumer_info.on_message_callback(self, evt.method,
File "main.py", line 79, in callback
processing(json.loads(body))
File "main.py", line 34, in processing
r = recomm(path, keywords)
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/recommendation.py", line 17, in init
video_clip = me.VideoFileClip(r"{}".format(path))
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/moviepy/video/io/VideoFileClip.py", line 88, in init
self.reader = FFMPEG_VideoReader(filename, pix_fmt=pix_fmt,
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/moviepy/video/io/ffmpeg_reader.py", line 35, in init
infos = ffmpeg_parse_infos(filename, print_infos, check_duration,
File "/home/medo/Dev/Smart-remotely-interviewing-system/backend/Process-interview/test/lib/python3.8/site-packages/moviepy/video/io/ffmpeg_reader.py", line 289, in ffmpeg_parse_infos
raise IOError(("MoviePy error: failed to read the duration of file %s.\n"
OSError: MoviePy error: failed to read the duration of file 74b74292-3642-486a-8319-255bb7e7da5a-1647363285285.webm.
Here are the file infos returned by ffmpeg:

ffmpeg version 4.2.2-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, matroska,webm, from '74b74292-3642-486a-8319-255bb7e7da5a-1647363285285.webm':
Metadata:
encoder : Chrome
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0(eng): Audio: opus, 48000 Hz, mono, fltp (default)
Stream #0:1(eng): Video: vp8, yuv420p(progressive), 640x480, SAR 1:1 DAR 4:3, 29.42 fps, 29.42 tbr, 1k tbn, 1k tbc (default)
Metadata:
alpha_mode : 1
At least one output file must be specified