Recherche avancée

Sur d’autres sites (9067)

• Linking to static libs cross compiled for android complains "no archive symbol table (run ranlib)"

  5 octobre 2017, par Programist

  I am trying to build FFmpeg for android as static libraries. Following is my buildscript.sh

  #!/bin/bash
  
  
  
  cd ffmpeg-3.3
  
  
  
  NDK=/Users/sambitpujari/codeenv/ndk/android-ndk-r15c
  
  SYSROOT=$NDK/platforms/android-26/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64
  
  CPREFIX=$TOOLCHAIN/bin/arm-linux-androideabi-ar
  
  
  
  function build_ffmpeg_android {
  
  
  
  ./configure \
  
    --prefix=$PREFIX \
  
    --disable-programs \
  
    --enable-static \
  
    --disable-shared \
  
    --disable-doc \
  
    --enable-postproc \
  
    --enable-swscale \
  
    --enable-avfilter \
  
    --enable-avresample \
  
    --enable-pic \
  
    --disable-opencl \
  
    --disable-securetransport \
  
    --enable-videotoolbox \
  
    --enable-audiotoolbox \
  
    #--enable-libx264 \
  
    --cross-prefix=$CPREFIX \
  
    --target-os=linux \
  
    --arch=arm \
  
    --enable-cross-compile \
  
    --enable-gpl \
  
    --sysroot=$SYSROOT \
  
    --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
    --extra-ldflags="$ADDI_LDFLAGS" \
  
    $ADDITIONAL_CONFIGURE_FLAG
  
    make clean
  
    make -j9
  
    make install
  
  }
  
  
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU
  
  ADDI_CFLAGS="-marm"
  
  
  
  build_ffmpeg_android

  The output of above script is placed inside ffmpeg-3.3/android/arm.

  Problem :
  When trying to link to these .a libraries from my app (-lavformat -lavcodec -lswscale -lavutil -lavfilter -lswresample -lavdevice),
  I get the following linker error for each of them

  :-1: error: error: avformat: no archive symbol table (run ranlib)
  
  :-1: error: error: avcodec: no archive symbol table (run ranlib)
  
  :-1: error: error: swscale: no archive symbol table (run ranlib)
  
  :-1: error: error: avutil: no archive symbol table (run ranlib)
  
  :-1: error: error: avfilter: no archive symbol table (run ranlib)
  
  :-1: error: error: swresample: no archive symbol table (run ranlib)
  
  :-1: error: error: avdevice: no archive symbol table (run ranlib)

  Looking at this discussion, I am doing it correct by selecting arm-linux-androideabi-ar in CPREFIX.

  Question :
  What else am I missing here ? What is needed in my buildscript.sh to satisfy correct linking ?

• avcodec/pixlet : fixes integer overflow in read_highpass()

  17 août 2017, par Michael Niedermayer

  avcodec/pixlet : fixes integer overflow in read_highpass()
  Fixes : runtime error : negation of -2147483648 cannot be represented in type 'int32_t' (aka 'int') ; cast to an unsigned type to negate this value to itself
  
  Fixes : 2879/clusterfuzz-testcase-minimized-6317542639403008
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/pixlet.c

• Converting DAV to MP4 and OGG

  25 avril, par mackowiakp

  I want to prepare WEB page containing films from security camera recorders. Each recorder transmit video files in DAV format so each film is converted to MP4 format by script, using such syntax :

  



  ffmpeg -y -i movie.dav -vcodec libx264 -crf 24 movie.mp4


  



  So I included in HTMLv5 code such entry :

  



   <video width="320" height="240">&#xA;  <source src="movie.mp4" type="video/mp4">&#xA;</source></video> &#xA;

  



  It works correctly with Chrome but not with Firefox. For proper work in FF it is necessary add link to OGG file. So correct HTMLv5 syntax for both browsers should look like this :

  



   <video width="320" height="240">&#xA;  <source src="movie.mp4" type="video/mp4">&#xA;  <source src="movie.ogg" type="video/ogg">&#xA;</source></source></video>&#xA;

  



  Can anybody help me to pass correct ffmpeg syntax to create OGG file ?

  



  Output from console after using -movflags +faststart options

  



  [maciek@piotr MMM]$ ../ffmpeg-2.4.2-64bit-static/ffmpeg -movflags +faststart -y -i   04.24.23-04.24.38\[M\]\[@0\]\[0\].dav -vcodec libx264 -crf 24 10.mp4
ffmpeg version 2.4.2-   http://johnvansickle.com/ffmpeg/    Copyright (c) 2000-2014 the FFmpeg developers
  built on Oct  9 2014 07:24:56 with gcc 4.8 (Debian 4.8.3-11)
  configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libx265 --enable- libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --disable-ffserver --enable-libass --enable-gnutls --cc=gcc-4.8
  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
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
Option movflags not found.