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• how can I get the length of an video in order to validate django form before upload can begin ?

  10 juillet 2013, par GetItDone

  I have an app running on heroku that allows users to upload videos, then I use ffmpeg to preform 3 tasks using celery and redis-to-go :

  1) Check the format and if it isn't already mp4, convert it to mp4.
  
  2) Extract a 3 minute clip, in mp4 format
  
  3) Grab an image from the video

  The problem is that I want to verify the video length before the video is uploaded and the three tasks are run since I want to make sure all videos are at least 15 minutes, and if not I want to raise a ValidationError. So when validating the form, I want to do something like this :

  def clean(self, *args, **kwargs):        
  
      data = super(ContentTypeRestrictedVideoField, self).clean(*args, **kwargs)
  
  
  
      file = data.file
  
      try:
  
          content_type = file.content_type
  
          main, extension = content_type.split('/')
  
          if content_type in self.content_types:
  
              if file._size > self.max_upload_size:
  
                  raise forms.ValidationError(_('Please keep filesize under %s. Current filesize %s') % (filesizeformat(self.max_upload_size), filesizeformat(file._size)))
  
              if VIDEO_LENGTH < MINIMUM_LENGTH:
  
                  raise forms.ValidationError(_('Please make sure video file is at least %s. Current video length %s') % (MINIMUM_LENGTH, VIDEO_LENGTH)
  
          else:
  
              raise forms.ValidationError(_('File type is not supported. File must be mov, flv, avi, mpeg, wmv, or mp4.'))
  
      except AttributeError:
  
          pass        
  
  
  
      return data

  What could I do for VIDEO_LENGTH and MINIMUM_LENGTH ? I read that ffprobe could be used for getting the duration, but it isn't available with the buildpack I am using and I am very inexperienced. I can't just validate file size because it can vary greatly depending on numerous factors. Anyone have any solution as to what I could try ? Thanks

• merge an audio and an image and create video using fmpeg android

  5 juin 2013, par Kamal Sharma

  I want to merge IMAGE + AUDIO and convert them into video using FFMPEG library,i compiled the library successfully,and got libfmpeg.so.but getting problem to execute the ffmpeg command through java code.This is command which i am using... "ffmpeg -i image8.jpg -i file.m4a -acodec copy test.mp4" if i execute this ffmpeg command through CMD,my video.mp4 file is successfully created,but if exceute same command through my Activity,it doesnot create any file.

  I used the code :

  public class Mpeg extends Activity {
  
  static {
  
  
  
  System.loadLibrary("ffmpeg");
  
  
  
  }
  
  
  
  @Override
  
  protected void onCreate(Bundle savedInstanceState) {
  
  super.onCreate(savedInstanceState);
  
  setContentView(R.layout.activity_mpeg);
  
  File mf = Environment.getExternalStorageDirectory();
  
  
  
  String livestream = mf.getAbsoluteFile()+"smile.png";
  
  
  
  String folderpth = mf.getAbsoluteFile()+"RABBA.MP3";
  
  
  
  //String output="/home/saicomputer/game.mp4";
  
  
  
  String output = new File(Environment.getExternalStorageDirectory(), "video.mp4").getAbsolutePath();
  
  Log.i("Test", "Let's set output to " + output);
  
  
  
  String cmd="ffmpeg -i "+ livestream +" -i "+ folderpth +" -acodec copy "+ output;
  
  
  
   Log.e("chck plzzzzz", "after "+ cmd);
  
  
  
  //String jaiho="ffmpeg -i image8.jpg -i file.m4a -acodec copy test.mp4";
  
  
  
  try{
  
  
  
  Process p = Runtime.getRuntime().exec(cmd);
  
  
  
  }
  
  catch(Exception e)
  
  {
  
      System.out.println("exception"+e);
  
  }

  and the logcat is

  06-05 17:58:10.686: D/dalvikvm(1189): Trying to load lib  /data/data/com.example.myfmpeg/lib/libffmpeg.so 0x412a5cf0
  
  06-05 17:58:10.756: I/dalvikvm(1189): threadid=3: reacting to signal 3
  
  06-05 17:58:10.955: D/dalvikvm(1189): Added shared lib /data/data/com.example.myfmpeg/lib/libffmpeg.so 0x412a5cf0
  
  06-05 17:58:10.955: D/dalvikvm(1189): No JNI_OnLoad found in /data/data/com.example.myfmpeg/lib/libffmpeg.so 0x412a5cf0, skipping init
  
  06-05 17:58:11.024: I/dalvikvm(1189): Wrote stack traces to '/data/anr/traces.txt'
  
  06-05 17:58:11.215: I/dalvikvm(1189): threadid=3: reacting to signal 3
  
  06-05 17:58:11.326: I/dalvikvm(1189): Wrote stack traces to '/data/anr/traces.txt'
  
  06-05 17:58:11.466: E/image(1189): imageeeeeeeee /mnt/sdcard/smile.png
  
  06-05 17:58:11.466: E/Test(1189): songggggggggg /mnt/sdcard/RABBA.MP3
  
  06-05 17:58:11.476: E/Test(1189): outputttttt /mnt/sdcard/video.mp4
  
  06-05 17:58:11.476: E/chck plzzzzz(1189): after ffmpeg -i /mnt/sdcard/smile.png -i /mnt/sdcard/RABBA.MP3 -acodec copy /mnt/sdcard/video.mp4
  
  06-05 17:58:11.896: E/AndroidRuntime(1189): FATAL EXCEPTION: main
  
  06-05 17:58:11.896: E/AndroidRuntime(1189): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfmpeg/com.example.myfmpeg.Mpeg}: java.lang.RuntimeException: java.io.IOException: Error running exec(). Command: [ffmpeg, -i, /mnt/sdcard/smile.png, -i, /mnt/sdcard/RABBA.MP3, -acodec, copy, /mnt/sdcard/video.mp4]    Working Directory: null Environment: null
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at     android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at android.os.Handler.dispatchMessage(Handler.java:99)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at android.os.Looper.loop(Looper.java:137)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at android.app.ActivityThread.main(ActivityThread.java:4424)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at java.lang.reflect.Method.invokeNative(Native Method)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at java.lang.reflect.Method.invoke(Method.java:511)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189):     at dalvik.system.NativeStart.main(Native Method)
  
  06-05 17:58:11.896: E/AndroidRuntime(1189): Caused by: java.lang.RuntimeException: java.io.IOException: Error running exec(). Command: [ffmpeg, -i, /mnt/sdcard/smile.png, -i, /mnt/sdcard/RABBA.MP3, -acodec, copy, /mnt/sdcard/video.mp4] Working Directory: null Environment: null

  I dont know what is the error when run from java. Any help ????

• Anomalie #3645 : Hauteur du champ texte en sortie de plein écran

  20 août 2016, par RastaPopoulos ♥

  Oui, merci, je ne ferme volontairement pas moi-même les tickets généralement, je mets en résolu le temps que d’autres confirment qu’effectivement ça marche aussi chez eux. Si c’est tout bon, c’est super. :)