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• test/test_compression.sh : Fix for OSX.

  26 novembre 2014, par Erik de Castro Lopo

  test/test_compression.sh : Fix for OSX.
  On Mac OSX, the ’wc -c’ command returns a number with leading whitespace
  
  which then results in a syntax error when the shell parser expects a
  
  number when it really has a string containing a number. The easy fix is
  
  to use string interpolation.
  Closes : https://sourceforge.net/p/flac/bugs/420/
  
  Reported-by : Mark Harris <mark.hsj@gmail.com>
  

  • [DH] test/test_compression.sh

• compile FFmpeg error on windows when run ./configure

  5 novembre 2013, par user1325717

  I want to use FFmpeg to decode mp3 and acc on android, I use android-ndk-r7 and the newest cygwin.

  I wrote a shell config.sh, which content is :

  ---

  TMPDIR=/cygdrive/c/temp
  
  
  
  PREBUILT=/cygdrive/c/android-ndk-r7/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows
  
  PLATFORM=/cygdrive/c/android-ndk-r7/platforms/android-8/arch-arm
  
  
  
  ./configure --target-os=linux --arch=arm --enable-version3 --enable-gpl --enable-nonfree --disable-stripping --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-ffprobe --disable-encoders --disable-muxers --disable-devices --disable-protocols --enable-protocol=file --enable-avfilter --disable-network --disable-mpegaudio-hp --disable-avdevice --enable-cross-compile --cc=$PREBUILT/bin/arm-linux-androideabi-gcc --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- --nm=$PREBUILT/bin/arm-linux-androideabi-nm --extra-cflags="-fPIC -DANDROID" --disable-asm --enable-neon --enable-armv5te --extra-ldflags="-Wl,-T,$PREBUILT/arm-eabi/lib/ldscripts/armelf_linux_eabi.x -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtbegin.o $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtend.o -lc -lm -ldl"

  ---

  I open cmd and do bash to open cygwin shell, then do ./config, the problem is appeared :
  "/cygdrive/c/android-ndk-r7/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/arm-linux-androideabi-gcc is unable to create an executable file..."

  the config.log is :

  check_ld
  
  check_cc
  
  BEGIN /cygdrive/c/temp/ffconf.SFJc3t92.c
  
      1   int main(void){ return 0; }
  
  END /cygdrive/c/temp/ffconf.SFJc3t92.c
  
  gcc -fPIC -DANDROID -std=c99 -c -o /cygdrive/c/temp/ffconf.YKRv5TSp.o /cygdrive/c/temp/ffconf.SFJc3t92.c
  
  /cygdrive/c/temp/ffconf.SFJc3t92.c:1:0: warning: -fPIC ignored for target (all code is position independent)
  
  gcc -Wl,-rpath-link=/cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib -L/cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib -nostdlib /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtend_android.o -lc -lm -ldl -o /cygdrive/c/temp/ffconf.Yf1Ftjmo /cygdrive/c/temp/ffconf.YKRv5TSp.o
  
  /usr/lib/gcc/i686-pc-cygwin/4.5.3/../../../../i686-pc-cygwin/bin/ld: /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o: Relocations in generic ELF (EM: 40)
  
  /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o: could not read symbols: File in wrong format
  
  collect2: ld returned 1 exit status
  
  C compiler test failed.

  I don't know what is happened, is there someone who know what is happened, thanks.

• It is possible using ffmpeg to burn in srt and speed up without audio adjustment in one go ?

  25 novembre 2022, par MANICX100

  I have the following functions in my config file (fish shell, but the command would be easily adaptable) to one burn in provided srt subtitles above the file and another to speed up the file video and audio without adjusting the pitch.

  


  function ffmpeg-burnin-srt
    ffmpeg -i $argv[1] -vf subtitles=$argv[2] -preset ultrafast $($now)-output.mkv
end

function speedupvid
      ffmpeg -i $argv[1] -filter_complex "[0:v]setpts=1/$argv[2]*PTS[v];[0:a]rubberband=tempo=$argv[2][a]" -map "[v]" -map "[a]" -preset ultrafast $($now)-output.mkv
end


  


  I would like to and have tried combining the two but that is not allowed as it is a mixture of filters when complex is being used.

  


  I believe I could run the two functions as one, but that would involve encoding twice.

  


  Is it possible to do both steps in one pass and if not what would be the best solution ?