Recherche avancée

Sur d’autres sites (9012)

• Libav/FFmpeg and Google Summer of Code 2012

  26 avril 2012, par Multimedia Mike — General, ffmpeg, gsoc, gsoc2012, hevc, libav, opus, rtmp, ut video

  So, the projects are participating in the Google Summer of Code for the 2012 season. (While Libav is the project officially accepted to particular, I still refer to the projects because FFmpeg will also benefit).

  Here are the students, projects, and mentors for this summer :

  1. Andrew D’Addesio is working on an Opus Decoder, mentored by Justin Ruggles
  2. Guillaume Martres is working on an HEVC video decoder, mentored by Mashiat Sarker Shakkhar
  3. Jan Ekström is working on an LGPL Ut Video encoder, mentored by Kostya Shishkov
  4. Jordi Ortiz is working to rewrite avserver, mentored by Luca Barbato
  5. Samuel Pitoiset is working on an RTMP[E|S|T|TE] protocol implementation, mentored by Martin Storsjö

  Wish them luck– these are some ambitious projects.

• How I can use Runtime.getRuntime.exec with ffmpeg library in Android ?

  24 février 2015, par beni

  I’m trying to establish the correct rotation in my recorded video because in some devices the setOrientationHint method doesn’ work becuase in some video players may choose to ignore the compostion matrix in a video during playback, Android Documentation.

  So, I’ve decided to use the ffmpeg library. I’m develop a test for the app. In Ubuntu, I download this library and execute the configure and make to obtain the ffmpeg executable, I copy this executable to the DCIM folder in the sdcard, the same for a video what I’ve recorded for my camera recorder app. So, in the DCIM folder, I have the ffmpeg executable and a video.

  I created a test project and in the onCreate method, I’ve include :

  try {
  
  
  
  Process p= Runtime.getRuntime().exec("chmod 777 /mnt/sdcard/beni/ffmpeg");
  
  p.waitFor();
  
  
  
  p = Runtime.getRuntime().exec("/mnt/sdcard/beni/ffmpeg -i /mnt/sdcard/beni/f.mp4 -vf \"transpose=1\" -r 24 -sameq /mnt/sdcard/beni/f2.mp4");
  
  p.waitFor();
  
  
  
  BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));  
  
  String line = null;  
  
  while ((line = in.readLine()) != null) {  
  
      System.out.println(line);  
  
  }  
  
  
  
  
  
  
  
  
  
  } catch (IOException e) {
  
      e.printStackTrace();
  
  } catch (InterruptedException e) {
  
  e.printStackTrace();
  
  }

  but I have the following warning :

  09-13 13:14:03.547: W/System.err(7782): java.io.IOException: Error running exec(). Command: [/mnt/sdcard/beni/ffmpeg, -i, /mnt/sdcard/beni/f.mp4, -vf, "transpose=1", -r, 24, -sameq, /mnt/sdcard/beni/f2.mp4] Working Directory: null Environment: null
  
  09-13 13:14:03.547: W/System.err(7782):     at java.lang.ProcessManager.exec(ProcessManager.java:224)
  
  09-13 13:14:03.547: W/System.err(7782):     at java.lang.Runtime.exec(Runtime.java:189)
  
  09-13 13:14:03.547: W/System.err(7782):     at java.lang.Runtime.exec(Runtime.java:275)
  
  09-13 13:14:03.547: W/System.err(7782):     at java.lang.Runtime.exec(Runtime.java:210)
  
  09-13 13:14:03.547: W/System.err(7782):     at com.example.prueba.MainActivity.onCreate(MainActivity.java:22)
  
  09-13 13:14:03.547: W/System.err(7782):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
  
  09-13 13:14:03.547: W/System.err(7782):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1623)
  
  09-13 13:14:03.547: W/System.err(7782):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675)
  
  09-13 13:14:03.547: W/System.err(7782):     at android.app.ActivityThread.access$1500(ActivityThread.java:121)
  
  09-13 13:14:03.547: W/System.err(7782):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943)
  
  09-13 13:14:03.547: W/System.err(7782):     at android.os.Handler.dispatchMessage(Handler.java:99)
  
  09-13 13:14:03.547: W/System.err(7782):     at android.os.Looper.loop(Looper.java:138)
  
  09-13 13:14:03.547: W/System.err(7782):     at android.app.ActivityThread.main(ActivityThread.java:3701)
  
  09-13 13:14:03.547: W/System.err(7782):     at java.lang.reflect.Method.invokeNative(Native Method)
  
  09-13 13:14:03.547: W/System.err(7782):     at java.lang.reflect.Method.invoke(Method.java:507)
  
  09-13 13:14:03.547: W/System.err(7782):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
  
  09-13 13:14:03.547: W/System.err(7782):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636)
  
  09-13 13:14:03.547: W/System.err(7782):     at dalvik.system.NativeStart.main(Native Method)
  
  09-13 13:14:03.547: W/System.err(7782): Caused by: java.io.IOException: Permission denied
  
  09-13 13:14:03.547: W/System.err(7782):     at java.lang.ProcessManager.exec(Native Method)
  
  09-13 13:14:03.547: W/System.err(7782):     at java.lang.ProcessManager.exec(ProcessManager.java:222)
  
  09-13 13:14:03.547: W/System.err(7782):     ... 17 more

  Is this code right ? Or I’ve done something wrong.

• avfilter/vf_unsharp : use av_malloc_array()

  13 juin 2014, par Michael Niedermayer

  avfilter/vf_unsharp : use av_malloc_array()
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavfilter/vf_unsharp.c