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• Converting mp4 AAC to AVC using Python

  12 janvier 2020, par zion.b.

  i am using ffmpeg to convert video format. I have a video in mp4 aac and want to convert it to mp4 avc. I successfully(!!!) used ffmpeg to covert image to avi/mkv/even copy of the mp4 but nothing gives me what i desire.

  The idea is to have a video file format that will run on mostly all mobile devices such as mp4 avc.
  

  My python code :
  

  import subprocess #need to install ffmpegin terminal/cmd
  
  
  
  def convert_video(video_input, video_output):
  
      cmds = ['ffmpeg', '-i', video_input, video_output]
  
      subprocess.Popen(cmds)
  
  
  
  
  
  convert_video("videoName.mp4", "videoNameCopy.mp4")

• FFMPEG command works in shell, but not in node.js

  10 février 2017, par moeiscool

  When my ffmpeg command is built by my node.js application it does not run. it says

  Output file #0 does not contain any stream

  but if i copy and paste that line into terminal it works fine. Any ideas ?

  ffmpeg -loglevel warning -i rtsp://50.73.56.89/axis-media/media.3gp -stimeout 2000 -r 5 -movflags frag_keyframe+empty_moov -s 640x480 -use_wallclock_as_timestamps 1 -q:v 1 -f segment -segment_time 3600000 -segment_format webm -c:v libvpx -strftime 1 '/home/nodejs/cloudcam/videos/2Df5hBE/bunny/%Y-%m-%dT%H-%M-%S.webm'

  note the single quotes wrapping the filename. I tried using double quotes but it did the same thing. I need the quotes for the particular app i am building. Some names are not space friendly.

• mp3 audio merging with -itsoffset using ffmpeg : no effect

  30 mai 2019, par Itzhak

  I use ffmpeg to merge mp3’s in my node server. It works but the offset doesn’t have any effect..
  I can’t see what is wrong then i’d like to get your help :)

  var command = "ffmpeg -i "+ input1+ " -itsoffset 40 -i " + input2 +" -filter_complex amerge -c:a libmp3lame -q:a 4 "+ output;
  
  
  
          exec(command, function (error, stdout, stderr) {
  
              if (stdout) console.log(stdout);
  
              if (stderr) console.log(stderr);
  
  
  
              if (error) {
  
                  console.log('exec error: ' + error);
  
                  response.statusCode = 404;
  
                  response.end();
  
  
  
              } else {
  
                  // Do something
  
              }
  
  
  
          });

  I tried it also on my computer just in the terminal and it also works with the same problem..

  Thanks,
  Itzhak