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• Issues in executing FFmpeg command in Java code in Linux

  12 août 2017, par Tina J

  I have problems executing this ffmpeg command in my java code :

  ffmpeg -i sample.mp4 -i ad.mp4 -filter_complex "[0:v]trim=0:15,setpts=PTS-STARTPTS[v0]; [1:v]trim=0:5,setpts=PTS-STARTPTS[v1]; [0:v]trim=20:30,setpts=PTS-STARTPTS[v2]; [v0][v1][v2]concat=n=3:v=1:a=0[out]" -map "[out]" output.mp4

  I used the getRuntime() method below, but that doesn’t work for me. Even if I simply remove the ", still it doesn’t work. When I simply copy-paste the equivalent string in terminal, it works.

  String c1=" -i "+dir+"sample.mp4 "+"-i "+dir+"ad.mp4 -fi‌​lter_complex [0:v]‌​trim=0:15,setpts=PTS‌​-STARTPTS[v0]; [1:v]trim=0:5,setpts=PTS-STARTPTS[v1]; [0:v]trim=20:30,setpts=PTS-STARTPTS[v2]; [v0][v1][v2]concat=n=3:v=1:a=0[out] -map [out] "+dir+"output.‌​mp4";
  
  RunCommand("ffmpeg"+c1);

  Using this method :

  private static void RunCommand(String command) throws InterruptedException {
  
      try {
  
          // Execute command
  
          Process proc = Runtime.getRuntime().exec(command);
  
          System.out.println(proc.exitValue());
  
  
  
          // Get output stream to write from it
  
          // Read the output
  
  
  
          BufferedReader reader =  
  
                  new BufferedReader(new InputStreamReader(proc.getInputStream()));
  
          String line = "";
  
          while((line = reader.readLine()) != null) {
  
              System.out.print(line + "\n");
  
              //              System.out.println(ads.get(0));
  
          }
  
          proc.waitFor();  
  
  
  
      } catch (IOException e) {
  
      }
  
  }

  This one doesn’t work also, and printing the exit value shows this :

  Exception in thread "main" java.lang.IllegalThreadStateException: process hasn't exited
  
      at java.lang.UNIXProcess.exitValue(UNIXProcess.java:423)
  
      at parser.Parser.RunCommand(Parser.java:106)
  
      at parser.Parser.commandGenerator2(Parser.java:79)
  
      at parser.Parser.main(Parser.java:44)

  If I move the proc.waitFor(); before printing the exit value, it is 1.

  What is the problem ? Why it doesn’t run in Java code ?

• mips/mathops : remove 64-bit code

  26 février 2015, par James Cowgill

  mips/mathops : remove 64-bit code
  GCC is perfectly happy generating optimized multiplication code on its own for
  
  64-bit arches. GCC refuses to optimize the loongson code when in 32-bit mode,
  
  so I’ve left that.
  Signed-off-by : James Cowgill <james410@cowgill.org.uk>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/mips/mathops.h

• How to code Laravel FFMpeg video conversion for specific parameters ?

  7 octobre 2022, par Wayne Fulcher

  I am using Laravel 9.x running php 8.1.x.
I have some code that I use to convert videos that have a context type other than video/mp4 to a H264 format. The reason is to make a video format that is compatible with Apple (iOS), Android and most web browsers. This code has worked so far on every video we have used it on except for one.
My current code is

  


          $ffmpeg = FFMpeg::create();
        $video = $ffmpeg->open($videoFilename);
        $format = new X264();
        $format->setAudioCodec("aac"); 
        $video->save($format, $newFilename);


  


  So in an attempt to debug what else needs to be done I started manually running ffmpeg commands on my computer against a copy of the video in question. I have finally figured out what additional parameters are required to successfully convert that video so it plays on all devices. The manual command is as follows :

  


  ffmpeg -i input.mov -pix_fmt yuv420p -b:v 4000k -c:v libx264 output.mp4


  


  I am about 90% sure the parameters that dealt with the specifics of this video were the following :

  


  -pix_fmt yuv420p -b:v 4000k

  


  My problem now is I can not figure out what changes to my php code I need to make that would be the equivalent to those additional command line parameters.
Also I am wondering as I am typing this question, is there a way for me to "auto-detect" when a video requires this additional parameters or not ? (maybe that is a second post/question)