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• ffmpeg Error : Pattern type 'glob' was selected but globbing is not support ed by this libavformat build

  14 septembre 2017, par Aryan Naim

  I’m trying to convert group of ".jpg" files acting as individual frames into 1 single mpeg video ".mp4"

  Example parameters i used :

  frame duration  = 2 secs
  
  frame rate      = 30  fps
  
  encoder         = libx264 (mpeg)
  
  input pattern   = "*.jpg"
  
  output pattern  = video.mp4

  Based on ffmpeg wiki instructions at (https://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images), I issued this command :

  ffmpeg -framerate 1/2 -pattern_type glob -i "*.jpg" -c:v libx264 -r 30 -pix_fmt yuv420p video.mp4

  But I’m getting this error :

  [image2 @ 049ab120] Pattern type 'glob' was selected but globbing is not 
  
  supported by this libavformat build *.jpg: Function not implemented

  Which probably means the API pattern matching commands for my build/version have changed. By the way this my windows 32bit ffmpeg download build (ffmpeg-20150702-git-03b2b40-win32-static).

  How can I choose a group of files using pattern matching using ffmpeg ?

• Unable to get a continuous video of last N seconds using ffmpeg [duplicate]

  28 juin 2021, par trycatch22

  I am trying to create a dashcam from an RTSP streaming device using ffmpeg (in Python). I have it working, but I am losing a small bit of video between stopping a file and starting a new file.

  


  My pseudocode looks like this :

  


  Start recording in 5s increments
while True:
   now = get current time
   if now > split:
       stop recording
       start recording with new file name


  


  At any point when I send a trigger, I wait (up to 5s) for the current file to be written to disk, and then I stitch the required number of files to get a video of the desired length. The issue is that I am losing time between the stop and the start.

  


  I am starting a new file like so :

  


  process_cmd = "ffmpeg -y -loglevel panic -i rtsp://{}:{}@{} -vf scale={}:{} -t {} {}".format(self._rtsp_login, self._rtsp_pwd, self._rtsp_server, self._width, self._height,self._rtsp_video_duration,output_file)
self._process_handle = subprocess.Popen(process_cmd, shell=True)


  


  I am waiting for the video to be done recording by :

  


  self._process_handle.wait()


  


  What's a cleaner way to do this ? One option would be to write a longer file and then use ffmpeg to extract the desired N seconds from it.

  


  proc = subprocess.Popen("ffmpeg -y -i rtsp://admin:ambi1234@192.168.1.200 -profile:v high -pix_fmt nv12 -b:v 15M -acodec aac out.mp4", stdin=subprocess.PIPE,shell=True)


  


  This requires me to stop the recording first by sending 'q' to the process and then :

  


  subprocess.Popen("ffmpeg -y -sseof -00:00:3 -i out.mp4 -vcodec copy -acodec copy test.mp4", shell=True)


  


  But that source file (out.mp4) would have to be cleaned up every so often and if an event happens at that point, then I won't be able to capture the data.

  


• 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