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• ffmpeg null filter when configuring (no such filter 'eq')

  20 octobre 2017, par Diolor

  I configure ffmpeg to compile it an Android gcc (among others) like that :

  ./configure --disable-filters --enable-filter=atrim,trim,eq

  And this is the preview :

  Enabled filters:
  
  aformat          anull            atrim            format           null             trim

  Obviously the eq filter is missing and in it’s place it’s the null enabled filter. As expected the eq filter is also missing from the executable binary and if we try use the eq filter it will return :

   No such filter: 'eq', Error reinitializing filters!, Failed to inject frame into filter network: 
  
   Invalid argument, Error while processing the decoded data for stream #0:0, Conversion failed!

  Full configuration :

  --prefix=/path/to/x86 
  
  --enable-static --disable-shared 
  
  --enable-small 
  
  --enable-cross-compile 
  
  --target-os=linux
  
  --arch=x86 
  
  --sysroot=/path/to/sysroot 
  
  --cross-prefix=/path/to/i686-linux-android- 
  
  --enable-pic 
  
  --disable-ffplay 
  
  --disable-ffprobe 
  
  --disable-ffserver 
  
  --disable-doc 
  
  --disable-filters 
  
  --enable-filter=atrim,trim,eq 
  
  --disable-asm 
  
  --disable-debug
  
  --extra-cflags=-I/path/to/usr/include -O3 -Wno-deprecated-declarations -fpie -pie -Wl,-z,relro,-z,now -march=i686 -m32 -mtune=intel -mssse3 -mfpmath=sse
  
  --extra-ldflags=-L/path/to/usr/lib -fpie -pie

• ffmpeg libx264 neon optimization breaks execution

  27 janvier 2014, par nmxprime

  Hi use libx264 source obtained from x264-snapshot-20140122-2245 and compiling using below script

  NDK=~/Android/android-ndk-r7c
  
  PLATFORM=$NDK/platforms/android-9/arch-arm/
  
  PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86
  
  function build_one
  
  {
  
  ./configure --prefix=$PREFIX \
  
  --sysroot=$PLATFORM \
  
  --disable-avs \
  
  --disable-lavf \
  
  --disable-ffms \
  
  --disable-gpac \
  
  --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
  --host=arm-linux \
  
  --enable-static \
  
  --libdir=$PLATFORM/usr/lib \
  
  --includedir=$PLATFORM/usr/include \
  
  --extra-cflags="-march=armv7-a -mfloat-abi=softfp -mfpu=neon -mvectorize-with-neon-quad" \
  
  --extra-ldflags="-Wl,--fix-cortex-a8" \
  
  --enable-debug

  The config log is :

  platform:      ARM
  
  system:        LINUX
  
  cli:           yes
  
  libx264:       internal
  
  shared:        no
  
  static:        yes
  
  asm:           yes
  
  interlaced:    yes
  
  avs:           no
  
  lavf:          no
  
  ffms:          no
  
  mp4:           no
  
  gpl:           yes
  
  thread:        no
  
  opencl:        yes
  
  filters:       crop select_every
  
  debug:         yes
  
  gprof:         no
  
  strip:         no
  
  PIC:           no
  
  bit depth:     8
  
  chroma format: all
  
  
  
  You can run 'make' or 'make fprofiled' now.

  I hope the above code compiles and optimizes for NEON execution

  Doubts :

  Why Threads is no, because i didn't specified --disable-thread

  What is cli and it's significance here, also significance of opencl, such that libx264 uses opencl features ?

  ---

  Then i built ffmpeg 1.2.5with following script

  ./configure --target-os=linux \
  
  --prefix=$PREFIX \
  
  --enable-cross-compile \
  
  --extra-libs="-lgcc" \
  
  --arch=arm \
  
  --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
  
  --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
  --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
  
  --sysroot=$PLATFORM \
  
  --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \
  
  --disable-shared \
  
  --enable-static \
  
  --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog -lx264 $EXTRA_LD_FLAG" \
  
  --disable-ffplay \
  
  --disable-everything \
  
  --enable-avformat \
  
  --enable-avcodec \
  
  --enable-libx264 \
  
  --enable-gpl \
  
  --enable-encoder=libx264 \
  
  --enable-encoder=libx264rgb \
  
  --enable-decoder=h264 \
  
  --disable-network \
  
  --disable-avfilter \
  
  --disable-avdevice \
  
  --enable-debug=3 \
  
  $ADDITIONAL_CONFIGURE_FLAG

  where

  ADDITIONAL_CONFIGURE_FLAG = --enable-debug=3
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mvectorize-with-neon-quad"

  The log shows NEON supported.

  When i run the code (called in a while loop),

  ret = avcodec_encode_video2(c, &pkt, picture, &got_output);//avcodec_encode_video(c, finalout, outbuf_size, picture);
  
  
  
  fprintf(stderr,"ret = %d, got-out = %d \n",ret,got_output);
  
  if (ret < 0) 
  
          fprintf(stderr, "error encoding frame\n");
  
  
  
      if (got_output) 
  
          fprintf(stderr,"encoding frame %3d (size=%5d): (ret=%d)\n", 1, pkt.size,ret);

  it runs for 2 or 3 time(during which if(got_output) is not true), then i get SIGSEGV. Tried addr2line and ndk-stack but no use[Though i enabled debug info, ndk-stack cannot find routine info].

  I edited libx264's encoder.c code with some fprintf statements.
  Posting snippet of code

     if( h->frames.i_input <= h->frames.i_delay + 1 - h->i_thread_frames )
  
      {
  
          /* Nothing yet to encode, waiting for filling of buffers */
  
          pic_out->i_type = X264_TYPE_AUTO;
  
  fprintf(stderr,"EditLog:: Returns as waiting for filling \n"); //edit
  
          return 0;
  
      }
  
  }
  
  
  
  else
  
  {
  
      /* signal kills for lookahead thread */
  
      x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
  
      h->lookahead->b_exit_thread = 1;
  
      x264_pthread_cond_broadcast( &h->lookahead->ifbuf.cv_fill );
  
      x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
  
  }
  
  fprintf(stderr,"After wait for fill \n");
  
  fprintf(stderr,"h: %p \n",h); //edit
  
  fprintf(stderr,"h->i_frame = %p \n",&h->i_frame); //edit
  
  h->i_frame++;
  
  fprintf(stderr,"after i_frame++");

  in log, i don't see after i_frame++, here occurs (may be) the SIGSEGV.

  Please help in solving it. The same works without neon optimization !!

• ffmpeg libx264 neon optimization breaks execution

  27 janvier 2014, par nmxprime

  Hi use libx264 source obtained from x264-snapshot-20140122-2245 and compiling using below script

  NDK=~/Android/android-ndk-r7c
  
  PLATFORM=$NDK/platforms/android-9/arch-arm/
  
  PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86
  
  function build_one
  
  {
  
  ./configure --prefix=$PREFIX \
  
  --sysroot=$PLATFORM \
  
  --disable-avs \
  
  --disable-lavf \
  
  --disable-ffms \
  
  --disable-gpac \
  
  --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
  --host=arm-linux \
  
  --enable-static \
  
  --libdir=$PLATFORM/usr/lib \
  
  --includedir=$PLATFORM/usr/include \
  
  --extra-cflags="-march=armv7-a -mfloat-abi=softfp -mfpu=neon -mvectorize-with-neon-quad" \
  
  --extra-ldflags="-Wl,--fix-cortex-a8" \
  
  --enable-debug

  The config log is :

  platform:      ARM
  
  system:        LINUX
  
  cli:           yes
  
  libx264:       internal
  
  shared:        no
  
  static:        yes
  
  asm:           yes
  
  interlaced:    yes
  
  avs:           no
  
  lavf:          no
  
  ffms:          no
  
  mp4:           no
  
  gpl:           yes
  
  thread:        no
  
  opencl:        yes
  
  filters:       crop select_every
  
  debug:         yes
  
  gprof:         no
  
  strip:         no
  
  PIC:           no
  
  bit depth:     8
  
  chroma format: all
  
  
  
  You can run 'make' or 'make fprofiled' now.

  I hope the above code compiles and optimizes for NEON execution

  Doubts :

  Why Threads is no, because i didn't specified --disable-thread

  What is cli and it's significance here, also significance of opencl, such that libx264 uses opencl features ?

  ---

  Then i built ffmpeg 1.2.5with following script

  ./configure --target-os=linux \
  
  --prefix=$PREFIX \
  
  --enable-cross-compile \
  
  --extra-libs="-lgcc" \
  
  --arch=arm \
  
  --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
  
  --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
  --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
  
  --sysroot=$PLATFORM \
  
  --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \
  
  --disable-shared \
  
  --enable-static \
  
  --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog -lx264 $EXTRA_LD_FLAG" \
  
  --disable-ffplay \
  
  --disable-everything \
  
  --enable-avformat \
  
  --enable-avcodec \
  
  --enable-libx264 \
  
  --enable-gpl \
  
  --enable-encoder=libx264 \
  
  --enable-encoder=libx264rgb \
  
  --enable-decoder=h264 \
  
  --disable-network \
  
  --disable-avfilter \
  
  --disable-avdevice \
  
  --enable-debug=3 \
  
  $ADDITIONAL_CONFIGURE_FLAG

  where

  ADDITIONAL_CONFIGURE_FLAG = --enable-debug=3
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mvectorize-with-neon-quad"

  The log shows NEON supported.

  When i run the code (called in a while loop),

  ret = avcodec_encode_video2(c, &pkt, picture, &got_output);//avcodec_encode_video(c, finalout, outbuf_size, picture);
  
  
  
  fprintf(stderr,"ret = %d, got-out = %d \n",ret,got_output);
  
  if (ret < 0) 
  
          fprintf(stderr, "error encoding frame\n");
  
  
  
      if (got_output) 
  
          fprintf(stderr,"encoding frame %3d (size=%5d): (ret=%d)\n", 1, pkt.size,ret);

  it runs for 2 or 3 time(during which if(got_output) is not true), then i get SIGSEGV. Tried addr2line and ndk-stack but no use[Though i enabled debug info, ndk-stack cannot find routine info].

  I edited libx264's encoder.c code with some fprintf statements.
  Posting snippet of code

     if( h->frames.i_input <= h->frames.i_delay + 1 - h->i_thread_frames )
  
      {
  
          /* Nothing yet to encode, waiting for filling of buffers */
  
          pic_out->i_type = X264_TYPE_AUTO;
  
  fprintf(stderr,"EditLog:: Returns as waiting for filling \n"); //edit
  
          return 0;
  
      }
  
  }
  
  
  
  else
  
  {
  
      /* signal kills for lookahead thread */
  
      x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
  
      h->lookahead->b_exit_thread = 1;
  
      x264_pthread_cond_broadcast( &h->lookahead->ifbuf.cv_fill );
  
      x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
  
  }
  
  fprintf(stderr,"After wait for fill \n");
  
  fprintf(stderr,"h: %p \n",h); //edit
  
  fprintf(stderr,"h->i_frame = %p \n",&h->i_frame); //edit
  
  h->i_frame++;
  
  fprintf(stderr,"after i_frame++");

  in log, i don't see after i_frame++, here occurs (may be) the SIGSEGV.

  Please help in solving it. The same works without neon optimization !!