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• Reduce compiled ffmpeg library size based on what I need

  20 septembre 2014, par Alin

  I finally managed to build ffmpeg as detailed in here : https://enoent.fr/blog/2014/06/20/compile-ffmpeg-for-android/ and in the end, I have a ffmpeg library which accepts command arguments.

  I am ONLY applying a watermark image over the video so for it I am using this ffmpeg command :

  ffmpeg -i input.avi -i logo.png -filter_complex 'overlay=10:main_h-overlay_h-10' output.avi

  Basic config :

    ./configure \
  
      --prefix=$PREFIX \
  
      --disable-shared \
  
      --enable-static \
  
      --disable-doc \
  
      --disable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffprobe \
  
      --disable-ffserver \
  
      --disable-doc \
  
      --disable-symver \
  
      --enable-protocol=concat \
  
      --enable-protocol=file \
  
      --enable-muxer=mp4 \
  
      --enable-demuxer=mpegts \
  
      --enable-memalign-hack \
  
      --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
      --target-os=linux \
  
      --arch=arm \
  
      --enable-cross-compile \
  
      --sysroot=$SYSROOT \
  
      --extra-cflags="-Os -fpic -marm $ADDI_CFLAGS" \
  
      --extra-ldflags="$ADDI_LDFLAGS"

  No other commands needed from ffmpeg.

  When compiling ffmpeg I get these files :

  

  I want to reduce the size of the library to as small as possible, so given the above command, are there any files that I can remove from final build ?

  ALSO which is the most common CPU found in current devices ? arm v7vfpv3, arm v7vfp, arm v7n ? I want to cover as many devices as possible.

  #arm v6
  
  #CPU=armv6
  
  #OPTIMIZE_CFLAGS="-marm -march=$CPU"
  
  #PREFIX=./android/$CPU 
  
  #ADDITIONAL_CONFIGURE_FLAG=
  
  #build_one
  
  
  
  #arm v7vfpv3
  
  CPU=armv7-a
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
  
  PREFIX=./android/$CPU
  
  ADDITIONAL_CONFIGURE_FLAG=
  
  build_one
  
  
  
  #arm v7vfp
  
  #CPU=armv7-a
  
  #OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
  
  #PREFIX=./android/$CPU-vfp
  
  #ADDITIONAL_CONFIGURE_FLAG=
  
  #build_one
  
  
  
  #arm v7n
  
  #CPU=armv7-a
  
  #OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8"
  
  #PREFIX=./android/$CPU 
  
  #ADDITIONAL_CONFIGURE_FLAG=--enable-neon
  
  #build_one
  
  
  
  #arm v6+vfp
  
  #CPU=armv6
  
  #OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
  
  #PREFIX=./android/${CPU}_vfp 
  
  #ADDITIONAL_CONFIGURE_FLAG=
  
  #build_one

• FFMPEG recording from live m3u8 to a .ts file

  6 juillet 2016, par Riste Markovski

  I am trying to record from a live HLS to save a file.

  However sometimes the HLS stutters or cuts for a short amount of time probably even less than seconds and interrupts my recording.

  The command and FFMPEG build :

      ffmpeg -i http://xxxxxxx.akamaihd.net/i/xxxxxxxxxx/index_2528_av-p.m3u8 -c copy xxx.ts
  
      ffmpeg version 2.4.3-1ubuntu1~trusty6 Copyright (c) 2000-2014 the FFmpeg developers
  
        built on Nov 22 2014 17:07:19 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
        configuration: --prefix=/usr --extra-version='1ubuntu1~trusty6' --build-suffix=-ffmpeg --toolchain=hardened --extra-cflags= --extra-cxxflags= --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-fontconfig --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-opengl --enable-x11grab --enable-libxvid --enable-libx265 --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libx264 --enable-libsoxr --enable-openal --enable-libopencv
  
        libavutil      54.  7.100 / 54.  7.100
  
        libavcodec     56.  1.100 / 56.  1.100
  
        libavformat    56.  4.101 / 56.  4.101
  
        libavdevice    56.  0.100 / 56.  0.100
  
        libavfilter     5.  1.100 /  5.  1.100
  
        libavresample   2.  1.  0 /  2.  1.  0
  
        libswscale      3.  0.100 /  3.  0.100
  
        libswresample   1.  1.100 /  1.  1.100
  
        libpostproc    53.  0.100 / 53.  0.100
  
      [h264 @ 0xf6f620] non-existing PPS 0 referenced
  
          Last message repeated 1 times
  
      [h264 @ 0xf6f620] decode_slice_header error
  
      [h264 @ 0xf6f620] no frame!
  
      [h264 @ 0xf6f620] non-existing PPS 0 referenced

  Error :

  [http @ 0xf96680] HTTP error 404 Not Found
  
      [hls,applehttp @ 0xec0e40] Failed to open segment of playlist 0
  
      http://xxxxxxxx.akamaihd.net/i/xxxxxindex_2528_av-p.m3u8: Input/output error

  Also I have no idea why am I getting these errors :

      h264 @ 0xf6f620] decode_slice_header error
  
      [h264 @ 0xf6f620] no frame!
  
      [h264 @ 0xf6f620] non-existing PPS 0 referenced
  
          Last message repeated 1 times
  
      [h264 @ 0xf6f620] decode_slice_header error
  
      [h264 @ 0xf6f620] no frame!
  
      [h264 @ 0xf6f620] non-existing PPS 0 referenced

  P.S. This is my first post so don’t be too hard on me.

• smc : fix the bounds check

  3 octobre 2014, par Michael Niedermayer

  smc : fix the bounds check
  Fixes invalid writes when there are more blocks in a run than total
  
  remaining blocks.
  CC : libav-stable@libav.org
  
  Bug-ID : CVE-2014-8548
  
  Found-by : Mateusz "j00ru" Jurczyk and Gynvael Coldwind
  
  Signed-off-by : Anton Khirnov <anton@khirnov.net>
  

  • [DH] libavcodec/smc.c