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• Command works on terminal but not with Kotlin

  9 novembre 2019, par Antony

  I’m trying to use an FFMPEG command for concatenating different videos. The command is

  ffmpeg -i video.mp4 -i video-2.mp4 -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" output.mp4

  This command works good when I run on Windows PowerShell. But when I try to run with Kotlin code it doesn’t work.

  val firstVideo = "D:\\Videos\\ffmpeg\\video.mp4"
  
  val secondVideo = "D:\\Videos\\ffmpeg\\video-2.mp4"
  
  val resultPath = "D:\\Videos\\ffmpeg\\result-2.mp4"
  
  
  
  val cmd = "ffmpeg -i $firstVideo -i $secondVideo -filter_complex \"[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]\" -map \"[v]\" -map \"[a]\" $resultPath"
  
  .split(" ").toTypedArray()
  
  
  
  Runtime.getRuntime().exec(cmd)

  I’m not taking any error messages since I’m using FFMPEG cli.

  Also, this piece of Kotlin works perfect when I’m trying to run other FFMPEG operations.

• Can no longer get ffmpeg to run in Terminal on macOS

  31 décembre 2023, par Chewie The Chorkie

  Here's a command I tried to run which always worked :

  


  Mac-mini:images Admin$ ffmpeg -r 30  -f image2 -s 1080x1080 -i %d.png -vcodec h264 -crf 25  -pix_fmt yuv420p zVideo.mp4


  


  The output I get is :

  


  dyld[94095]: Library not loaded: /usr/local/opt/theora/lib/libtheoraenc.1.dylib
  Referenced from: <20EBE016-0DD0-3F29-96CD-D22BC2E40B38> /usr/local/Cellar/ffmpeg/6.1.1/bin/ffmpeg
  Reason: tried: '/usr/local/opt/theora/lib/libtheoraenc.1.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/usr/local/opt/theora/lib/libtheoraenc.1.dylib' (no such file), '/usr/local/opt/theora/lib/libtheoraenc.1.dylib' (no such file)
Abort trap: 6


  


  I've tried reinstalling ffmpeg, installing the command line tools from Xcode, and Xcode itself.

  


• ffmpeg commands execution failed when run from Java. Executed successfully when the command is run in the terminal

  28 septembre 2022, par Kaung Myat Khaing

  I'm working on a java project which works with audio file manipulation(I'm newbie to Java). I want to get the start and end time of silence in the audio with ffmpeg "silencedetect" audio filter and write the results to a text file.
I run the filter command within the following function, but it always result in failure(prints "Silence Detection failed"). Then, I tried running the command in the terminal and it was successful(prints "Silence Detection successful"). I don't know what's wrong with my java code. I have other functions which execute other ffmpeg commands with the same flow as provided, but they works fine.
Here's the function.

  


  public static void getSilence(String filePath) throws InterruptedException, IOException {
        //                detect silence
        System.out.println("Silence Detection cmd: ffmpeg -i " + filePath
                + " -af silencedetect=d=1:noise=-60dB -f null - |& awk '/silencedetect/ {print $4,$5}' > "
                + SOURCE_PATH + "/silence_detections/silenceInfo.txt");
        Process silenceDetect = Runtime.getRuntime().exec("ffmpeg -i " + filePath
                + " -af silencedetect=d=1:noise=-60dB -f null - |& awk '/silencedetect/ {print $4,$5}' > "
                + SOURCE_PATH + "/silence_detections/silenceInfo.txt");

        if (silenceDetect.waitFor() == 0) {
            System.out.println("Silence Detection successful");
        } else System.out.println("Silence Detection failed");
    }