Recherche avancée

Sur d’autres sites (11546)

• How to solve bad instruction `vadd.i16 q0,q0,q0' when attempting to check gcc for neon instruction

  6 juillet 2012, par newentry

  Checking  gcc supports failed for neon instruction vadd.i16 q0,q0,q0
  
      test.c
  
  
  
      int main ()
  
      {
  
       __asm__("vadd.i16 q0, q0, q0"); return 0;
  
      }
  
  
  
      arm-linux-androideabi-gcc test.c
  
      /tmp/ccfc8m0G.s: Assembler messages:
  
      /tmp/ccfc8m0G.s:24: Error: bad instruction `vadd.i16 q0,q0,q0'

  Tried with flags -mcpu=cortex-a8 -mfpu=neon but stil no success

  Above code was used to test gcc support for neon instruction.

  Actually i am trying to build x264 with NEON support for ARM platformAfter running configure script
  x264 config log file contains

  Command line options : "—cross-prefix=arm-linux-androideabi-" "—enable-pic" "—extra- cflags=-mcpu=cortex-a8" "—host=arm-linux"

  checking whether arm-linux-androideabi-gcc works... yes
  
  checking whether arm-linux-androideabi-gcc supports for( int i = 0; i < 9; i++ ); with -std=gnu99... yes
  
  checking whether arm-linux-androideabi-gcc supports __asm__("rev ip, ip");... yes
  
  checking whether arm-linux-androideabi-gcc supports __asm__("movt r0, #0");... yes
  
  checking whether arm-linux-androideabi-gcc supports __asm__("vadd.i16 q0, q0, q0");... no
  
  
  
  arm-linux-androideabi-gcc conftest.c  -Wall -I. -I$(SRCPATH) -mcpu=cortex-a8 -std=gnu99    -lm -o conftest
  
  E:\cygwin\tmp\ccVtVI1i.s: Assembler messages:
  
  E:\cygwin\tmp\ccVtVI1i.s:24: Error: bad instruction `vadd.i16 q0,q0,q0'
  
  --------------------------------------------------
  
  Failed program was:
  
  --------------------------------------------------
  
  int main () { __asm__("vadd.i16 q0, q0, q0"); return 0; }
  
  --------------------------------------------------
  
  
  
  
  
  config.h contains
  
  
  
  #define HAVE_MALLOC_H 1
  
  #define HAVE_ARMV6 1
  
  #define HAVE_ARMV6T2 1
  
  #define ARCH_ARM 1
  
  #define SYS_LINUX 1
  
  #define HAVE_VECTOREXT 1
  
  #define fseek fseeko
  
  #define ftell ftello
  
  #define HAVE_GPL 1
  
  #define HAVE_INTERLACED 1
  
  #define HAVE_ALTIVEC 0
  
  #define HAVE_ALTIVEC_H 0
  
  #define HAVE_MMX 0
  
  #define HAVE_NEON 0
  
  #define HAVE_BEOSTHREAD 0
  
  #define HAVE_POSIXTHREAD 0
  
  #define HAVE_WIN32THREAD 0
  
  #define HAVE_THREAD 0
  
  #define HAVE_LOG2F 0
  
  #define HAVE_VISUALIZE 0
  
  #define HAVE_SWSCALE 0
  
  #define HAVE_LAVF 0
  
  #define HAVE_FFMS 0
  
  #define HAVE_GPAC 0
  
  #define HAVE_GF_MALLOC 0
  
  #define HAVE_AVS 0
  
  #define HAVE_CPU_COUNT 0
  
  
  
  
  
  Running make command build x264 static lib  based on above config.h which contains HAVE_NEON 0
  
  
  
  
  
  **Compiler Version**
  
  
  
  
  
  
  
  arm-linux-androideabi-gcc -v
  
  Using built-in specs.
  
  Target: arm-linux-androideabi
  
  Configured with: /tmp/ndk-digit/src/build/../gcc/gcc-4.4.3/configure --prefix=/usr/local/google/digit/repo/opensource/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows --target=arm-linux-androideabi --host=i586-mingw32msvc --build=x86_64-linux-gnu --with-gnu-as --with-gnu-ld --enable-languages=c,c++ --with-gmp=/tmp/ndk-digit/build/toolchain/temp-install --with-mpfr=/tmp/ndk-digit/build/toolchain/temp-install --disable-libssp --enable-threads --disable-nls --disable-libmudflap --disable
  
  -libgomp --disable-libstdc__-v3 --disable-sjlj-exceptions --disable-shared --disable-tls --with-float=soft --with-fpu=vfp --with-arch=armv5te --enable-target-optspace --enable-initfini-array --disable-nls --prefix=/usr/local/google/digit/repo/opensource/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows --with-sysroot=/usr/local/google/digit/repo/opensource/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/sysroot --with-binutils-version=2.20.1 --with-mpfr-version=2.4.1 --with
  
  -gmp-version=4.2.4 --with-gcc-version=4.4.3 --with-gdb-version=6.6 --with-arch=armv5te --program-transform-name='s,^,arm-linux-androideabi-,'
  
  Thread model: posix
  
  gcc version 4.4.3 (GCC)    

  Goal is to utilize neon enabled ARM processor to boost x264 encoder performance...

• Convert any type of videos to MP4 php without ffmpeg [on hold]

  17 décembre 2017, par Khalid Askia

  I have a website on which I allow users to upload videos. But I’m using the HTML5 video tag and only MP4 videos can be played. So I want to convert any type of video to MP4. I’m on a shared hosting account so I can’t have FFMPEG or anything else installed on the server. Is there another way to convert videos without these tools ?

• Open Video Downloader Error : Postprocessing : ffmpeg not found

  11 septembre 2022, par Nick the Community Scientist

  Error Thrown :

  


  ERROR: Postprocessing: ffmpeg not found. Please install or provide the path using --ffmpeg-location


  


  Context : macOS Big Sur M1 Chip, using the open video downloader program GitHub release or Homebrew. This specifically was thrown at the end of downloading the video file and the audio file from a given URL. The two files remained separate as a result of the error, the video was playable normally, but audio was in a .webm format (unusable for most people).

  


  Analysis : It is clear that a dependency is missing, or its path cannot be located. For macOS users like me, the first step after checking the app's preferences for a path set or dependency download function is to check for the given dependency in the system. Once checking using Homebrew, it became clear that several dependencies were missing.