Recherche avancée

Sur d’autres sites (4363)

• ffmpeg command does not work when run from .sh file

  19 novembre 2020, par Felipe Hurtado

  I am trying to run an ffmpeg command from a shell file but I am getting the following error :

  


  'NULL @ 0x343e9c0] Unable to find a suitable output format for '


  


   : Invalid argument

  


  Below the ffmpeg commnad

  


  ffmpeg -i "rtsp://admin:adminCTZSDS@192.168.0.5/1" -s 600x400 -framerate 20 -b:v 16k -preset slow -acodec libmp3lame -ar 11025 -crf 20 -f flv rtmp://localhost:1935/live/camara2 


  


  and this is the content of the shell file :

  


  #!/bin/bash
#script streaming
ffmpeg -i "rtsp://admin:adminCTZSDS@192.168.0.5/1" -s 600x400 -framerate 20 -b:v 16k -preset slow -acodec libmp3lame -ar 11025 -crf 20 -f flv rtmp://localhost:1935/live/camara2 
        


  


  the command works if I run it manually in a terminal

  


• How to Extract frames and set frames per seconds with .sh file

  20 août 2022, par Fraction Analytics

  I am trying to extract features from videos using a shell script file while extracting features from videos I don't know how to set frames per second.

  


  #!/bin/bash
frames_folder_path=./data
videos_folder_path=./videos
ext=mp4

mkdir "${frames_folder_path}"

for video_file_path in "${videos_folder_path}"/*."${ext}"; do
    slash_and_video_file_name="${video_file_path:${#videos_folder_path}}"
    slash_and_video_file_name_without_extension="${slash_and_video_file_name%.${ext}}"
    video_frames_folder_path="${frames_folder_path}${slash_and_video_file_name_without_extension}";
    mkdir "${video_frames_folder_path}"
    ffmpeg -i "${video_file_path}" "${video_frames_folder_path}/%d.jpg"
done


  


  I tried this code to extract the feature. I just want to extract 2 frames per second but It removes 30 frames per second with default frames rate.

  


  How to resolve this issue with shell script file.

  


• How to catch the ffmpeg connection error on python

  6 janvier 2017, par user824624

  I am working on the ffmpeg with python.This works when the remote server is working well, however when the remote server is down, I could see the message on the shell saying
  ’Connection to tcp ://xxxxxxx failed : Connection refused, blabla’

  pro = sp.Popen(command, preexec_fn=os.setsid, shell=False, stderr=sp.PIPE, stdout=sp.PIPE)

  catch exception approach 1 :

  try:
  
     out = self.pro.stderr.readline()
  
     while out:
  
              print '......'
  
  except BrokenPipeError:
  
       print 'err'

  catch exception approach 2 :

  for line in self.pro.stderr:
  
      try:
  
          print line
  
      except BrokenPipeError:
  
          print 'error'

  However none of these works.