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• how to convert one image to a video by using ffmpeg ?

  21 août 2017, par Tutu

  I downloaded and installed ffmpeg on my mac, however, I have a problem using it. I tried to use

  ffmpeg -loop 1 -i rho1.png -c:v libx264 -t 15 -pix_fmt yuv420p -vf scale=320:240 out.mp4

  however, the output is

  ld: warning: ignoring file video, file was built for unsupported file format ( 0x66 0x66 0x6D 0x70 0x65 0x67 0x20 0x2D 0x6C 0x6F 0x6F 0x70 0x20 0x31 0x20 0x2D ) which is not the architecture being linked (x86_64): video
  
  Undefined symbols for architecture x86_64:
  
  "_main", referenced from:
  
   implicit entry/start for main executable
  
  ld: symbol(s) not found for architecture x86_64
  
  clang: error: linker command failed with exit code 1 (use -v to see invocation)

  Need help with creating a video by using one picture in png.

• makedef : Extend the script for use with mingw tools as well

  24 août 2017, par Martin Storsjö

  makedef : Extend the script for use with mingw tools as well
  This is invoked by setting the NM and AR variables to the names of
  
  those specific tools. The ARCH variable also needs to be provided,
  
  to choose the symbol prefix (nm doesn’t provide any option that
  
  dumps the architecture easily).
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DBH] compat/windows/makedef

• FFMPEG iOS 7 Library

  15 septembre 2017, par Destiny Dawn

  I’ve tried reading many tutorials.
  I’ve spent hours on google, and stackoverflow trying answer.
  So far I’ve read : Trying to compile the FFMPEG libraries for iPhoneOS platform with armv6 and arv7 architecture FFMPEG integration on iphone/ ipad project and https://github.com/lajos/iFrameExtractor few of the many.

  I’m trying to build this library for iOS 7/Xcode 5 compatibility but it’s not working.
  A common error I’d get is :

  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  
  yasm/nasm not found or too old. Use --disable-yasm for a crippled build.
  
  
  
  If you think configure made a mistake, make sure you are using the latest
  
  version from Git.  If the latest version fails, report the problem to the
  
  ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
  
  Include the log file "config.log" produced by configure as this will help
  
  solving the problem.

  I’d also get many more once that is finished. Such as :

  rm: illegal option -- .
  
  usage: rm [-f | -i] [-dPRrvW] file ...
  
         unlink file
  
  make: *** [clean] Error 64

  I’ve mostly tried using this command to start, but it always crashes on "make clean" :

  ./configure \
  
  --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \
  
  --as='/usr/local/bin/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \
  
  --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk \
  
  --target-os=darwin \
  
  --arch=arm \
  
  --cpu=cortex-a8 \
  
  --extra-cflags='-arch armv7' \
  
  --extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk' \
  
  --prefix=compiled/armv7 \
  
  --enable-cross-compile \
  
  --enable-nonfree \
  
  --enable-gpl \
  
  --disable-armv5te \
  
  --disable-swscale-alpha \
  
  --disable-doc \
  
  --disable-ffmpeg \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-ffserver \
  
  --disable-asm \
  
  --disable-debug