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• how to redirect adb screenrecord output to pc(windows/linux) storage

  30 novembre 2018, par asullaherc

  In linux, I use following code to cast android screen to pc, it work well

  adb shell "screenrecord --time-limit 1 --output-format=h264 -; screenrecord --time-limit 180 --output-format=h264 -" | ffplay -

  so I think exist way to redirect screenrecord output to pc storage, so I try following code

  adb shell "screenrecord --time-limit 1 --output-format=h264 -; screenrecord --time-limit 180 --output-format=h264 -" >> /tmp/t.mp4

  but the output video file cannot be opened by vlc and google-chrome, how to fix it ?

  ffplay is belongs ffmpeg, so I guess exist similar cli in ffmpeg to output input video streaming into video file

• Python, FFMPEG : Redirecting output of FFMPEG subprocess call to a string

  31 décembre 2019, par user1452030

  I’ve managed to run an FFMPEG command using the subprocess module as shown below :

  output = subprocess.check_output(command, shell=True)

  This works fine, but it prints the verbose FFMPEG output to console. The program I’m writing is supposed to run for hundreds/thousands of files in a batch and I don’t want detailed outputs for every file processed, unless the user chooses to do so. Can I redirect the console outputs and errors to strings, so that I can decide when I should and shouldn’t print them ?

  This might be lame, but I tried the following snippet :

  outputBuffer = BytesIO()
  
  output = subprocess.check_output(command, shell=True, stdout=outputBuffer)

  But it gave me the following error :

  ValueError: stdout argument not allowed, it will be overridden.

  I saw other examples where the POpen interface was used, but given that I’m not communicating with the external command as it is running, and that I need to run this for a large number of items, I’d prefer something simpler, if possible.

  Thanks in advance !

  Note : I’ve found lots of questions in this broad topic, but I couldn’t find anything perfectly relevant to my situation.

• Publish local .mp4 video from android to wowza using FFmpeg

  13 mars 2016, par Parth Doshi

  I am trying to publish a local .mp4 video from my sdcard to wowza using the ffmpeg java wrapper.

  I have used the library for executing ffmpeg commands on Android

  On Android, my code looks as follows :

  FfmpegController objController = new FfmpegController(MainActivity.this, new File("/tmp"));
  
                  //objController.installBinaries(MainActivity.this,true);
  
                  mFfmpegBin = objController.installBinary(MainActivity.this, R.raw.ffmpeg, "ffmpeg", true);
  
                  //no just extract the audio
  
                  ArrayList<string> cmd = new ArrayList<string>();
  
  
  
                  //-f dshow -i video="Integrated Camera" out.mp4
  
                  cmd.add(mFfmpegBin);
  
                  //cmd.add("-sample_fmts");
  
                  cmd.add("-re");
  
                  cmd.add("-i");      
  
                  cmd.add("/sdcard/sample.mp4");
  
                  cmd.add("-c");
  
                  cmd.add("copy");
  
                  cmd.add("-f");
  
                  cmd.add("flv");
  
                  cmd.add("rtsp://192.168.1.35:1936/live/myStream");
  
  
  
                  objController.execFFMPEG(cmd, new ShellUtils.ShellCallback() {
  
  
  
                      @Override
  
                      public void shellOut(String shellLine) {
  
                          // TODO Auto-generated method stub
  
                          System.out.println("shell out" + " "  +shellLine);
  
                      }
  
  
  
                      @Override
  
                      public void processComplete(int exitValue) {
  
                          // TODO Auto-generated method stub
  
                          System.out.println("process complete::" + " " +exitValue);
  
  
  
                      }
  
                  });
  
  
  
              }catch(Exception ex){
  
                  ex.printStackTrace();
  
              }
  
          }
  
  </string></string>

  Now, when I execute the command, I get the following logs

  shell out Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/sdcard/sample.mp4':
  
  shell out rtmp://192.168.1.35:1936/live/myStream: Protocol not found

  Why is the protocol not supported on Android. When I run the same ffmpeg command from windows command line using ffmpeg then it works fine.

  The command is,

  ffmpeg -re -i sample.mp4 -c copy -f flv rtmp ://192.168.1.35:1936/live/myStream

  Can please someone help ?