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• FFMpeg Android Stagefright SIGSEGV error (h264 decode)

  19 avril 2013, par Sergey Ochkur

  I need to decode h264 file to YUV on Android 2.3+. As I understand I need to communicate with Stagefright, as it`s the only way now, after closing access with OpenMAX IL implementations. I have used FFmpeg 0.10 (and tried 0.9/0.9.1..) for this issue, compiled it with NDK7 (and also tried NDK6b with the same result) :

    ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jan 28 2012 14:42:37 with gcc 4.4.3
  
    configuration: --target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --cpu=armv7-a --sysroot=/home/grid/Android/Android_NDK/platforms/android-9/arch-arm --disable-avdevice --disable-decoder=h264 --disable-decoder=h264_vdpau --enable-libstagefright-h264 --prefix=build/stagefright/armeabi-v7a --extra-cflags='-Iandroid-source/frameworks/base/include -Iandroid-source/system/core/include -Iandroid-source/frameworks/base/media/libstagefright -Iandroid-source/frameworks/base/include/media/stagefright/openmax -I/home/grid/Android/Android_NDK/sources/cxx-stl/system/include -march=armv7-a -mfloat-abi=softfp -mfpu=neon' --extra-ldflags='-Wl,--fix-cortex-a8 -Landroid-libs -Wl,-rpath-link,android-libs' --extra-cxxflags='-Wno-multichar -fno-exceptions -fno-rtti'
  
    libavutil      51. 34.101 / 51. 34.101
  
    libavcodec     53. 60.100 / 53. 60.100
  
    libavformat    53. 31.100 / 53. 31.100
  
    libavfilter     2. 60.100 /  2. 60.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0.  6.100 /  0.  6.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  Hardware : Beagleboard-Xm + TI Android 2.3 (official)

  So, entering next command give me error with 480p :
  ffmpeg -i /sdcard/Video/480p.mp4

  Stopped (signal) ffmpeg -i /sdcard/Video/480p.mp4

  Full Android "answer" from ADB Logcat :
  http://pastebin.com/76JLgtXX

  Android-developers, does anybody know what this error means and how to deal with it ?
  I tried to make DSP window bigger, but with no luck.
  Commands like "stagefright /sdcard/Video/480p.mp4" works fine.

  P.S. Additionally I found that on some bigger files (720p) Android answers next :

  [libstagefright_h264 @ 0xd479b0] Decode failed : 80000000

• Revision 5e3439bbf7 : sad_test : fix msvc compile Fixes : error C2121 : '#' : invalid character : possib

  30 mai 2013, par James Zern

  Changed Paths :
   Modify /test/sad_test.cc

  
  
  sad_test : fix msvc compile

  Fixes :
  error C2121 : '#' : invalid character : possibly the result of a macro expansion

  Change-Id : I63d7ebba29f3a3cbb546406be39270290e9dc47d
  (cherry picked from commit a91e5b4fdc4e81352fa3a65c7fc795527eee6b07)

• FFMPEG works in command prompt. Not in PHP - is_executable() is true

  3 juillet 2012, par Dutchie432

  I am trying to run FFMPEG (windows library) on a video to create a thumbnail for it. The commands run perfectly from the command propmpt, but do not work from PHP. I have double-checked my permissions and the IIS user has full access to the directory. In addition, is_executable() returns true on the file. I'm pretty sure this isn't a permissions issue.

  I feel just as strongly that is probably an escaping issue and am having a hard time finding the correct combination here.

  when I tried doing $test = system ($cmd, $returnVal); and echoing $test, it was blank (false ?).

  Am I missing something ?

  PHP Code with 3 different methods of trying to execute the command

  $ffmpeg = dirname(__FILE__) .'\files\video\ffmpeg.exe';  
  
  echo "<strong>ffmpeg location:</strong> ".$ffmpeg.&#39;<br /><br />&#39;;
  
  
  
  if (file_exists($ffmpeg)) echo "file_exists() = true<br /><br />";
  
  if (is_executable($ffmpeg)) echo "is_executable() = true<br /><br />";  
  
  
  
  //Attempt 1
  
  $cmd = "$ffmpeg -i $video -deinterlace -an -ss $second -t 00:00:16 -r 1 -y -vcodec mjpeg -f mjpeg $image 2>&amp;1";
  
  echo "<strong>Executing</strong>: ".$cmd."<br /><br />";
  
  system   ($cmd, $returnValue);
  
  echo "Return Value: $returnValue<br /><hr /><br />";    
  
  
  
  //Attempt 2
  
  $cmd2= escapeshellcmd($cmd);
  
  echo "<strong>Executing</strong>: ".$cmd2."<br /><br />";
  
  system   ($cmd2, $returnValue);
  
  echo "Return Value: $returnValue<br /><hr /><br />";
  
  
  
  //Attempt 3        
  
  $cmd3 = str_replace(&#39;\\&#39;,"\\\\",escapeshellarg($ffmpeg)." -i ".escapeshellarg($video)." -deinterlace -an -ss $second -t 00:00:16 -r 1 -y -vcodec mjpeg -f mjpeg ".escapeshellarg($image)." 2>&amp;1"); 
  
  echo "<strong>Executing</strong>: ".$cmd3."<br /><br />";
  
  system   ($cmd3, $returnValue);
  
  echo "Return Value: $returnValue<br /><hr /><br />";   

  RESUTLS (all result in -1)

  ffmpeg location: C:\www\alphacom\files\video\ffmpeg.exe
  
  file_exists() = true
  
  is_executable() = true
  
  
  
  Executing: C:\www\alphacom\files\video\ffmpeg.exe -i C:\www\alphacom\files\video\test_video_ae.avi -deinterlace -an -ss 1 -t 00:00:16 -r 1 -y -vcodec mjpeg -f mjpeg C:\www\alphacom\files\video\test_video_ae.jpg 2>&1
  
  Return Value: -1
  
  
  
  Executing: C:^\www^\alphacom^\files^\video^\ffmpeg.exe -i C:^\www^\alphacom^\files^\video^\test_video_ae.avi -deinterlace -an -ss 1 -t 00:00:16 -r 1 -y -vcodec mjpeg -f mjpeg C:^\www^\alphacom^\files^\video^\test_video_ae.jpg 2^>^&1
  
  Return Value: -1
  
  
  
  Executing: "C:\\www\alphacom\\files\\video\\ffmpeg.exe" -i "C:\\www\\alphacom\\files\\video\\test_video_ae.avi" -deinterlace -an -ss 1 -t 00:00:16 -r 1 -y -vcodec mjpeg -f mjpeg "C:\\www\\alphacom\\files\\video\\test_video_ae.jpg" 2>&1
  
  Return Value: -1
  
  
  
  Executing: \"C:\\www\\alphacom\\files\\video\\ffmpeg.exe\" -i \"C:\\www\\alphacom\\files\\video\\test_video_ae.avi\" -deinterlace -an -ss 1 -t 00:00:16 -r 1 -y -vcodec mjpeg -f mjpeg \"C:\\www\\alphacom\\files\\video\\test_video_ae.jpg\" 2>&1
  
  Return Value: -1

  UPDATED DEBUG CODE

      $cmd = "$ffmpeg -i $video -deinterlace -an -ss $second -t 00:00:16 -r 1 -y -vcodec mjpeg -f mjpeg $image 2>&1";
  
      echo "<strong>Executing</strong>: ".$cmd."<br /><br />";
  
      $test = system($cmd, $returnValue);
  
      echo "Return Value: $returnValue<br /><hr /><br />";    
  
      var_dump($test);

  $test yields NULL