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• How do you build LGPL version of ffmpeg with libmp3lame ?

  19 juillet 2015, par Andrey

  I have a task to convert mp3 file + some picture into mp4 video. To do that I’m using ffmpeg library + libmp3lame, but I have to use LGPL version. So I’m trying to build it with appropriate flags, since I can’t find it in the internet.

  And I also need a win64 version, but I have to build it on Ubuntu VM (vagrant).

  Here is my script (a part from the vagrantfile) :

   sudo apt-get install -y mingw-w64
  
   sudo apt-get install -y git     
  
  
  
   wget http://downloads.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz
  
   tar xzvf lame-3.99.5.tar.gz
  
   cd lame-3.99.5
  
   ./configure --host=x86_64-w64-mingw32 --prefix="/vagrant/ffmpeg_build" --disable-shared --enable-static
  
   make
  
   make install
  
  
  
   cd /vagrant
  
  
  
   git clone https://github.com/FFmpeg/FFmpeg.git              
  
   cd FFmpeg/  
  
   ./configure --prefix="/vagrant/ffmpeg_build" --arch=x86_64 --cross-prefix=x86_64-w64-mingw32- --target-os=mingw32 --enable-static --disable-shared --disable-debug --disable-yasm --disable-w32threads --disable-network --extra-libs=-static --extra-cflags="-I/vagrant/ffmpeg_build/include" --extra-ldflags="-L/vagrant/ffmpeg_build/lib"        
  
   make

  Unfortunately in the very end of the build process I get

  ==> default: CC ffmpeg_opt.o
  
  ==> default: CC ffmpeg_filter.o
  
  ==> default: CC ffmpeg_dxva2.o
  
  ==> default: LD ffmpeg_g.exe
  
  ==> default: CP ffmpeg.exe
  
  ==> default: STRIP      ffmpeg.exe
  
  ==> default: x86_64-w64-mingw32-strip
  
  ==> default: :stgaDQCc
  
  ==> default: : Protocol error
  
  ==> default: make:
  
  ==> default: *** [ffmpeg.exe] Error 1

  What am I missing with my configuration ? Thanks in advance !

• Fast Video Compression on Android

  7 avril 2017, par Asif Aminur Rashid

  I want to upload video files to server and compress before uploading. I’m using ffmpeg libx264. I have seen viber can upload 30 second video file of size 78MB within a minute [reduce it’s down to 2.3MB]. I want to know how do they do it so fast ?

  What I have tried so far -

  FFMPEG version :  n2.4.2 
  
  Built with gcc 4.8
  
  
  
  Build Configuraiton : --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=

  Command :

  ffmpeg -y -i /storage/emulated/0/main.mp4 -s 480x320 -r 20 -c:v libx264 -preset ultrafast -c:a copy -me_method zero -tune fastdecode -tune zerolatency -strict -2 -b:v 1000k -pix_fmt yuv420p /storage/emulated/0/output.mp4

  The result so far is, a 30second 78MB file gets compressed to 4.3MB which takes around 1min 28seconds. Here is the console dump - http://pastebin.com/rn81acGx . I mainly want to reduce the time it takes to compress. How can I achieve this ?

  Thanks in advance.

• Fast Video Compression on Android

  7 avril 2017, par leap of faith

  I want to upload video files to server and compress before uploading. I’m using ffmpeg libx264. I have seen viber can upload 30 second video file of size 78MB within a minute [reduce it’s down to 2.3MB]. I want to know how do they do it so fast ?

  What I have tried so far -

  FFMPEG version :  n2.4.2 
  
  Built with gcc 4.8
  
  
  
  Build Configuraiton : --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=

  Command :

  ffmpeg -y -i /storage/emulated/0/main.mp4 -s 480x320 -r 20 -c:v libx264 -preset ultrafast -c:a copy -me_method zero -tune fastdecode -tune zerolatency -strict -2 -b:v 1000k -pix_fmt yuv420p /storage/emulated/0/output.mp4

  The result so far is, a 30second 78MB file gets compressed to 4.3MB which takes around 1min 28seconds. Here is the console dump - http://pastebin.com/rn81acGx . I mainly want to reduce the time it takes to compress. How can I achieve this ?

  Thanks in advance.