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• Using FFMPEG in Java (developing on Mac)

  1er mai 2012, par Luuk D. Jansen

  I am trying to evoke FFMPEG directly in my Java code (running under the Playframework !).
  The final product will run on a Linux/Debian distro, but I first need to test on my Mac (I don't know if it works on Debian yet).

  I try to execute the simple code :

  Process pr = Runtime.getRuntime().exec(new String[]{"bash","-c", "ffmpeg"});

  or simpler :

  Process pr = Runtime.getRuntime().exec("ffmpeg")

  or using ProcessBuilder :

  Process pr = new ProcessBuilder("/opt/local/bin/ffmpeg").start();

  What I get is an error code 133, but I cannot find what this means.
  In the terminal the command gives the normal output. I can also replace 'ffmpeg' with e.g. 'ls -la' and get the directory listing. But I don't know what the problem is that ffmpeg does not work.

  Anybody any clues ?
  Thanks !

  UPDATE :
  I looked at the error stream. These are the errors I get. How is it that it works in the terminal, but not in using Java ?

  14:43:19,619 DEBUG ~ FFMPEG: dyld: Library not loaded: /opt/local/lib/libogg.0.dylib
  
  14:43:19,619 DEBUG ~ FFMPEG:   Referenced from: /opt/local/bin/ffmpeg
  
  14:43:19,619 DEBUG ~ FFMPEG:   Reason: Incompatible library version: ffmpeg requires version 9.0.0 or later, but libogg.0.dylib provides version 6.0.0

• Revision 644bd87e8e : In frame Q adjustment experiment. The idea here is to allow "in frame" adjustme

  22 novembre 2013, par Paul Wilkins

  Changed Paths :
   Modify /vp9/common/vp9_onyx.h

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_onyx_int.h

  
   Modify /vp9/encoder/vp9_ratectrl.c

  
   Modify /vpxenc.c

  
  
  In frame Q adjustment experiment.

  The idea here is to allow "in frame" adjustment of the final Q
  value used to encode each SB64, using segmentation.

  There is also adjustment of the rd mult in regions of overspend.

  Activated using aq_mode=2

  Change-Id : I2f140cd898c9f877c32cd6d2e667f5e11ada4b1c

• FFmpeg X264 multithread decoding

  16 novembre 2013, par Xin He

  I want to do H264 multithread decoding using FFmpeg.
  First I use X264 to encode yuv420 to file.x264
  ./x264 -o file.x264 —slices 4 —input-res 1280x720 —fps 25 file_560x420.yuv

  The slices count is 4.

  However, when I use FFmpeg to decode,
  ./ffmpeg -y -threads 4 -thread_type slice -i file.x264 final.yuv

  FFmpeg calls func"execute_decode_slices" four times, not in a multithread way.
  I also found that in *execute_decode_slices(h, context_count)*, the context_count is 1.
  FFmpeg call this 4 times.

  Could someone help to solve this problem ?

  Thanks very much !