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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

• How i can fix selected processor does not support Thumb mode `itt gt'

  22 octobre 2017, par w liu

  When I compiled ffmpeg(version 3.3.4) for Android, I successfully compiled out .so, but there was an error while running the project.

  C :\Users\admin\AppData\Local\Temp\ffmpeg-105062.s : Assembler messages :
  C :\Users\admin\AppData\Local\Temp\ffmpeg-105062.s:43301 : Error : selected processor does not support Thumb mode

  itt gt'
 C:\Users\admin\AppData\Local\Temp\ffmpeg-105062.s:43302: Error: thumb conditional instruction should be in IT block --

  movgt r6,r0’
  C :\Users\admin\AppData\Local\Temp\ffmpeg-105062.s:43303 : Error : thumb conditional instruction should be in IT block —

  movgt r0,r1'
 C:\Users\admin\AppData\Local\Temp\ffmpeg-105062.s:43305: Error: selected processor does not support Thumb mode

  it le’
  C :\Users\admin\AppData\Local\Temp\ffmpeg-105062.s:43306 : Error : thumb conditional instruction should be in IT block —

  movle r0,r2'
 C:\Users\admin\AppData\Local\Temp\ffmpeg-105062.s:43308: Error: selected processor does not support Thumb mode

  it gt’
  C :\Users\admin\AppData\Local\Temp\ffmpeg-105062.s:43309 : Error : thumb conditional instruction should be in IT block — `movgt r6,r0’
  clang.exe : error : assembler command failed with exit code 1 (use -v to see invocation)
  

  NDK=/root/Ndk/android-ndk-r14b
  SYSROOT=$NDK/platforms/android-23/arch-arm/
  TOOLCHAIN=/root/Ndk/android-ndk-r14b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
  function build_one
  
  ./configure \
  —prefix=$PREFIX
  —enable-shared
  —disable-static
  —disable-doc
  —enable-ffmpeg
  —disable-ffplay
  —disable-ffprobe
  —disable-ffserver
  —disable-doc
  —disable-symver
  —enable-small
  —cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  —target-os=linux
  —arch=armv7-a
  —enable-cross-compile
  —sysroot=$SYSROOT
  —extra-cflags="-march=armv7-a -mfloat-abi=softfp -mfpu=neon -D__ARM_ARCH_7__ -D__ARM_ARCH_7A__"
  $ADDITIONAL_CONFIGURE_FLAG
  make clean
  make
  make install
  
  CPU=arm
  PREFIX=/root/FFmpegOut/android/$CPU
  build_one

• is it necessary in Anaconda for Matplotlib to install ffmpeg for animation saving ?

  2 mai 2018, par Vasyl Kolomiets

  For animation saving I have read some propositions
  1) manual installing ffmpeg this way :

    conda install -c conda-forge ffmpeg

  2) manual installing ImageMagick and changing matplotlib configuration file "matplotlibrc" this way :

  #animation.ffmpeg_args: ''         # Additional arguments to pass to ffmpeg
  
  #animation.avconv_path: 'avconv'   # Path to avconv binary. Without full path
  
                                     # $PATH is searched
  
  #animation.avconv_args: ''         # Additional arguments to pass to avconv
  
  #animation.mencoder_path: 'mencoder'
  
                                     # Path to mencoder binary. Without full path
  
                                     # $PATH is searched
  
  #animation.mencoder_args: ''       # Additional arguments to pass to mencoder
  
  #animation.convert_path: 'convert' # Path to ImageMagick's convert binary.
  
  animation.convert_path: F:\Games\ImageMagick-7.0.7-Q16\magick.exe
  
                                     # On Windows use the full path since convert
  
                                     # is also the name of a system tool.

  where line with pass to installed ImageMagick was added manually

  animation.convert_path: F:\Games\ImageMagick-7.0.7-Q16\magick.exe

  Two questions :
  1 - what way is better for Anaconda ?
  2 - really Anaconda has no better way ????