mad goal: port avconv to javascript (part 1 of 2)
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| first install x264, libvpx and avconv the normal way without emscripten: | |
| 0. install common dependencies | |
| > sudo apt-get install build-essential checkinstall build-dep | |
| 1. install yasm | |
| > cd [YOUR PROJECTS FOLDER] | |
| > wget http://www.tortall.net/projects/yasm/releases/yasm-1.2.0.tar.gz | |
| > tar xzvf yasm-1.2.0.tar.gz | |
| > cd yasm-1.2.0 | |
| > sudo ./configure | |
| > sudo make | |
| > sudo make install | |
| > yasm --version | |
| shows something like | |
| > yasm 1.2.0 | |
| 2. install x264 | |
| > cd [YOUR PROJECTS FOLDER] | |
| > git clone git://git.videolan.org/x264 x264 // or git pull when updating | |
| > cd x264 | |
| > sudo ./configure --enable-static --enable-shared | |
| > sudo make | |
| > sudo make install | |
| > x264 --version | |
| shows something like | |
| > x264 0.130.31 c832fe9 | |
| 3. install libvpx | |
| > cd [YOUR PROJECTS FOLDER] | |
| > git clone http://git.chromium.org/webm/libvpx.git // or git pull when updating | |
| > cd libvpx | |
| > sudo make clean | |
| > sudo ./configure | |
| > sudo make | |
| > sudo make install | |
| > vpxenc | |
| should show command line options = OK | |
| 4. install avconv | |
| > cd [YOUR PROJECTS FOLDER] | |
| > git clone git://git.libav.org/libav.git avconv // or git pull when updating | |
| > sudo apt-get install pkg-config // needed so that avconv can detect libraries | |
| > sudo ./configure | |
| > sudo ./configure --enable-gpl --enable-libx264 --enable-libvpx | |
| // when it says it cannot find libx264, try the above command again but with the extra option '--extra-libs=-ldl' | |
| > sudo make | |
| > sudo make install | |
| > avconv -v | |
| shows something like | |
| > avconv version v9-823-g352dbdb, Copyright (c) 2000-2013 the Libav developers | |
| at this point, you have everything ready for local video encoding. now let's focus on emscripten: | |
| 5. install emscripten: | |
| - install it into [YOUR PROJECTS FOLDER]/emscripten | |
| - do exactly like prescribed on https://github.com/kripken/emscripten/wiki/Tutorial | |
| - make sure you install clang version 3.2 first (NOT 3.1 or 3.3) | |
| - also run the suggested tests on the tutorial page. including optimizations. | |
| - do not proceed if these tests fail! | |
| 6. port x264 to javascript | |
| > cd [YOUR PROJECTS FOLDER]/x264 | |
| > sudo make uninstall | |
| > sudo make distclean | |
| > git pull | |
| > git clean -f | |
| > ./../emscripten/emconfigure ./configure --enable-static --disable-thread --disable-asm --extra-cflags="-O2" --extra-ldflags="-v" --host=i686-pc-linux-gnu | |
| > ./../emscripten/emmake make | |
| now turn the bitcode into js with: | |
| > ./../emscripten/emcc -O2 x264.o -o x264.js | |
| when done, type 'ls -ltr' and you should see a 374 kB large JS file named 'x264.js' a the bottom which is good. | |
| now proceed with the next library libvpx ... | |
| 7. port libvpx to javascript | |
| > cd [YOUR PROJECTS FOLDER]/libvpx | |
| > make clean | |
| > git pull | |
| > git clean -f | |
| do these modifications manually in vim for the files /build/make/configure.sh and configure exactly like here: | |
| http://code.google.com/r/benjaminmschwartz-libvpx-emscripten/source/detail?r=939cbcc1cea5da4c77af82dc8f9e68cbee04068e&spec=svn939cbcc1cea5da4c77af82dc8f9e68cbee04068e#publish | |
| but do not use llvm-ld, it's deprecated. use llvm-link instead. | |
| (i have reported this detour to the makers of libvpx here http://code.google.com/p/webm/issues/detail?id=566) | |
| okay, now configure and make libvpx! | |
| > sudo ./../emscripten/emconfigure ./configure --target=js1-none-clang_emscripten --disable-examples --disable-docs --disable-multithread --disable-runtime-cpu-detect --disable-optimizations --disable-vp8-decoder --disable-vp9-decoder --extra-cflags="-O2" | |
| > sudo ./../emscripten/emmake make | |
| > ./../emscripten/emcc -O2 libvpx.a -o libvpx.js | |
| then type this to check the js file: | |
| > ls -ltr | |
| you should see a 50kB large libvpx.js file at the bottom. great! | |
| 8. final step: port avconv to javascript!! | |
| see https://gist.github.com/binarykitchen/5329825 |
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If I want avconv with the whole shebang, then I do this instead:
sudo ./configure \ --enable-gpl --enable-libx264 --enable-libvpx --enable-libfaac \ --enable-libmp3lame --enable-libopus \ --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 \ --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb \ --enable-nonfree --enable-libfreetype --enable-shared --extra-libs="-ldl"