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• Why am I getting an exit status of 1 ?

  24 mai 2018, par Akaisteph7

  So, I am writing this code to analyze this video but I am facing this issue when I try to run it in Spyder, Anaconda :

  import subprocess
  
  from subprocess import call
  
  import math
  
  
  
  ##Converts the given file into a series of images
  
  def Video_to_Image_Converter(fileName):
  
      res1 = call("ffmpeg -i " + fileName + " -vf fps=1 frame-%d.jpg", shell=True)
  
      print(res1)
  
      result = subprocess.Popen('ffprobe -i '+ fileName +' -show_entries format=duration -v quiet -of csv="p=0"', stdout=subprocess.PIPE,stderr=subprocess.STDOUT, shell=True)
  
      output = result.communicate()
  
      print(output)
  
      #return math.ceil(float(output[0])) + 1
  
  
  
  
  
  if __name__ == '__main__':
  
      videoLength = Video_to_Image_Converter('sampleVideo.wmv')
  
      print(videoLength)

  So, this code worked fine in iPython but I started having issues when trying to use Spyder. res1 should have an exit status of 0 if everything went well but it is 1. However, I do not know what went wrong. All it says when running subprocess.check_output on call is :

  Command 'ffmpeg -i sampleVideo.wmv -vf fps=1 frame-%d.jpg' returned non-zero exit status 1

  Please help.

• How to use ffmpeg to check video corruption in python ?

  30 octobre 2019, par Jainal Gosaliya

  Hi i am currently having this python code :

  import subprocess
  
  import shlex
  
  
  
  cmd = "ffmpeg -v error -i 3.mp4 -f null - 2>error.log"
  
  new_cmd = shlex.split(cmd)
  
  subprocess_cmd = subprocess.list2cmdline(new_cmd)
  
  print(subprocess_cmd)
  
  subprocess.call(new_cmd)

  The issue is when i run the code i get the following error :

  [NULL @ 0x555594682920] Unable to find a suitable output format for ’2>error.log’
  2>error.log : Invalid argument

  Can anyone please help with this !

• How to extract RTSP stream frames using ffmpeg in python

  3 mars 2024, par Mohammad Dayarneh

  I want to extract the frames from an RTSP stream using a python script like

  


  import subprocess
import cv2
import numpy as np

def extract_frames_and_display(rtsp_url):
    ffmpeg_cmd = [
        "ffmpeg",
        "-i", rtsp_url,
        "-f", "image2pipe",
        "-pix_fmt", "bgr24",
        "-vcodec", "rawvideo",
        "-"
    ]

    ffmpeg_process = subprocess.Popen(ffmpeg_cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    try:
        while True:
            raw_frame = ffmpeg_process.stdout.read(1920 * 1080 * 3)
            if not raw_frame:
                break

            frame = np.frombuffer(raw_frame, dtype=np.uint8).reshape((1080, 1920, 3))

            frame = cv2.resize(frame, (800, 600))

            cv2.imshow("RTSP Stream", frame)
            if cv2.waitKey(1) & 0xFF == ord('q'):
                break

    finally:
        cv2.destroyAllWindows()
        ffmpeg_process.terminate()
        ffmpeg_process.wait()

rtsp_url = "rtsp://localhost:8554/live.stream"
extract_frames_and_display(rtsp_url)


  


  The problem in this code is that when showing the extracted frames using opencv they appear like multiple frames togather .. not each frame at a time like when we play a video.