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• ffmpeg cmd not running through nodejs getting error like error initializing filter \'select\' with args \'"not(mod(n\'\n']"

  22 juillet 2019, par Nileshdeora1122

  hello everyone i need your help i’m working on ffmpeg as following by blog post https://contextneutral.com/snippet/how-to-run-ffmpeg-from-inside-of-nodejs
  now i’m doing the same my ffmpeg command running successfully on the terminal but not working with nodejs.
  basicaly i’m trying to run :

  "ffmpeg -loglevel panic -y -i "video.mp4" -frames 1 -q:v 1 -vf "select=not(mod(n\,40)),scale=-1:120,tile=100x1" video_preview.jpg "

  my nodejs code looklike this :

  let ffmpeg = spawn(
  
  'ffmpeg', [
  
  '-i', `${ Inputvideofile }`,
  
  '-y', 
  
  '-frames',1,
  
  '-q:v', '1', 
  
  '-vf', ' "select=not(mod(n\,120)),scale=-1:40,tile=10x1 "  ',
  
  `${ outpputImgstripe }`
  
  ]);
  
  ffmpeg.on('exit', (statusCode) => {
  
      console.log(statusCode)
  
    if (statusCode === 0) {
  
       console.log('conversion successful')
  
    }
  
  })
  
  ffmpeg
  
    .stderr
  
    .on('data', (err) => {
  
      console.log('err:', new String(err))
  
    })
  
  
  
  module.exports = router;

  The error im getting is :

  Error initializing filter \'select\' with args \'"not(mod(n\'\n']
  
  err: [String: 'Error reinitializing filters!\nFailed to inject frame into filter network: Invalid argument\nError while processing the decoded data for stream #0:0\n']
  
  err: [String: 'Conversion failed!\n']
  
  1

  i think the error is :

  '-vf', ' "select=not(mod(n\,120)),scale=-1:40,tile=10x1 "  ',

  but don’t know how to solve pls help me

• ffmpeg - Hyperthreading causes "Conversion failed" with multiple parallel instances

  6 février 2019, par MeanStreet

  I’m trying to extract images from multiple videos in parallel, using ffmpeg.
  Here’s my bash script :

  for video in *.MOV; do
  
      base=`basename "$video" .MOV`
  
      ffmpeg -i "$video" -r 0.02 "$base"/out_%02d.png > logs/"$base" 2>&1 &
  
  done

  When running this (on 60 videos), I check the logs/ files and 40 of them have crashed at the beginning with the following error :

  Error initializing output stream 0:0 — Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  Conversion failed !

  However it works fine with a smaller amount of videos (around 5, even on videos that didn’t work before).

  EDIT : I tried to disable hyperthreading and it works fine now. Why is hyperthreading causing ffmpeg to fail ?

• Integrating FFMPEG using cmake : dlopen failed : library "libavutil.so.56" not found

  26 novembre 2018, par Hamed Momeni

  This question is a subsequent thread following this other question of mine.

  After finally managing to successfully building the apk file using gradle and cmake to integrate FFMPEG into an Android project I am facing a new exception which is thrown when calling System.loadLibrary.

  java.lang.UnsatisfiedLinkError: dlopen failed: library "libavutil.so.56" not found
  
          at java.lang.Runtime.loadLibrary0(Runtime.java:1016)
  
          at java.lang.System.loadLibrary(System.java:1657)
  
          at com.hmomeni.canto.activities.EditActivity.<init>(EditActivity.kt:26)
  
          at java.lang.Class.newInstance(Native Method)
  
          at android.app.Instrumentation.newActivity(Instrumentation.java:1174)
  
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2669)
  
          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
  
          at android.app.ActivityThread.-wrap11(Unknown Source:0)
  
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
  
          at android.os.Handler.dispatchMessage(Handler.java:106)
  
          at android.os.Looper.loop(Looper.java:164)
  
          at android.app.ActivityThread.main(ActivityThread.java:6494)
  
          at java.lang.reflect.Method.invoke(Native Method)
  
          at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
  
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
  
  </init>

  This is the part of code which is causing the error :

  class EditActivity : AppCompatActivity(), View.OnClickListener {
  
  
  
      init {
  
          System.loadLibrary("Canto")
  
      }
  
  ...
  
  }

  I tried moving the .so files inside the PROJECT/app/jniLibs and then adding the following line to build.gradle file to no avail.

  sourceSets.main.jniLibs.srcDirs = ['./jniLibs/']