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• Ffmpeg : How to remove text drawnusing drawtext

  27 septembre 2015, par ram

  Using the below command to draw text over a video file.

  ffmpeg -i /home/user/source.mp4 -vf "drawtext=fontfile=/usr/share/fonts/truetype/msttcorefonts/Times_New_Roman_Bold.ttf: text='Sample text':fontsize=40:x=300:y=100" /home/user/destination.mp4

  Question 1 : Will there be any way by which i could remove text drawn ("Sample text") from the final video "/home/user/destination.mp4" and have a new mp4 with the same video data without the text drawn ?

  Question 2 : Is there any way to know what was the text added to the video "/home/user/destination.mp4" ?

• How to join two video files using Python ?

  1er juillet 2013, par rash

  Here I tried to cut first and second 30sec long video file from "path/connect.webm" to the strings out and out1. It works. But what I need to do is to concatenate these two strings and write that to a file "path/final.webm". So that I get a 60sec long video file "final.webm" at the end. But now i get first 30sec long video only as the output. Please help me. Thanks a lot in advance.

  Code in python :

  import subprocess,os
  
  
  
  fname = "/home/xincoz/test/final.webm"
  
  
  
  fp = open(fname,'wb')
  
  
  
  ffmpeg_command = ["ffmpeg", "-i", "/home/xincoz/test/connect.webm", "-acodec", "copy",   "-ss", "00:00:00", "-t", "00:00:30","-f", "webm", "pipe:1"]
  
  
  
  p = subprocess.Popen(ffmpeg_command,stdout=subprocess.PIPE)
  
  
  
  out, err = p.communicate()
  
  
  
  ffmpeg_command1 = ["ffmpeg", "-i", "/home/xincoz/test/connect.webm", "-acodec", "copy",   "-ss", "00:00:31", "-t", "00:00:30","-f", "webm", "pipe:1"]
  
  
  
  p1 = subprocess.Popen(ffmpeg_command1,stdout=subprocess.PIPE)
  
  
  
  out1, err1 = p1.communicate()
  
  
  
  string = out + out1
  
  
  
  print len(out)
  
  
  
  print len(out1)
  
  
  
  print len(string)
  
  
  
  fp.write(string)
  
  
  
  fp.close()

  Please help me.

• How can i parse strings as the inputs to subprocess.Popen ?

  26 juillet 2013, par rash

  Here I tried to cut first and second 30sec long video file from "path/connect.flv" to the files output1.flv and output2.flv. It works. I able to concatenate these two files to form a new file "final.flv" of 60sec long. So this works and i am getting the outputs output1.flv [30sec], output2.flv[30sec] and final.flv[1min].

  Here is the python code :

  import subprocess
  
  
  
  ffmpeg_command1 = ["ffmpeg", "-i", "/home/xincoz/test/connect.flv", "-acodec", "copy", "-ss", "00:00:00", "-t", "00:00:30", "/home/xincoz/test/output1.flv"]
  
  
  
  ffmpeg_command2 = ["ffmpeg", "-i", "/home/xincoz/test/connect.flv", "-acodec", "copy", "-ss", "00:00:30", "-t", "00:00:30", "/home/xincoz/test/output2.flv"]
  
  
  
  ffmpeg_command3 = ["mencoder", "-forceidx", "-ovc", "copy", "-oac", "pcm", "-o", "/home/xincoz/test/final.flv", "/home/xincoz/test/output1.flv", "/home/xincoz/test/output2.flv"]
  
  
  
  subprocess.call(ffmpeg_command1)
  
  
  
  subprocess.call(ffmpeg_command2)
  
  
  
  subprocess.Popen(ffmpeg_command3)

  But what i really want is to concatenate two strings out1 and out2 and concatinate these two to a file instead of concatenating "/home/xincoz/test/output1.flv" and "/home/xincoz/test/output2.flv". So how can i parse string out1 and out2 as the inputs to mencoder ? Please edit my code to achieve the result.

  import subprocess,os
  
  
  
  ffmpeg_command = ["ffmpeg", "-i", "/home/xincoz/test/connect.flv", "-acodec", "copy", "-ss", "00:00:00", "-t", "00:00:30","-f", "flv", "pipe:1"]
  
  
  
  p = subprocess.Popen(ffmpeg_command,stdout=subprocess.PIPE)
  
  
  
  out1, err = p.communicate()
  
  
  
  ffmpeg_command1 = ["ffmpeg", "-i", "/home/xincoz/test/connect.flv", "-acodec", "copy", "-ss", "00:00:30", "-t", "00:00:30","-f", "flv", "pipe:1"]
  
  
  
  p1 = subprocess.Popen(ffmpeg_command1,stdout=subprocess.PIPE)
  
  
  
  out2, err1 = p1.communicate()
  
  
  
  ffmpeg_command2 = ["mencoder", "-forceidx", "-ovc", "copy", "-oac", "pcm", "-o", "/home/xincoz/test/final.flv", out1, out2 ]
  
  
  
  p2=subprocess.Popen(ffmpeg_command2)

  Please help me. Thanks a lot in advance.