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Compiling FFMpeg

Compiling FFMpeg with OpenH264

Alternatively to installing via apt-get, you can compile FFMpeg with OpenH264. To compile, you will need several tools installed on your system: make, g++, nasm, and pkg-config. To install the tools on Ubuntu run: apt-get install -y build-essential pkg-config nasm.

Once the tools are installed, proceed with compilation:

  • Get the FFMpeg source via git: git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg
  • Change directory to ffmpeg: cd ffmpeg
  • Make a build directory inside the ffmpeg directory: mkdir ffmpeg_build
  • Go back to the top-level: cd ..
  • Get the OpenH264 (Version 1.8) source code (download as zip)
  • Unzip openh264v1.8.zip into openh264 directory
  • Enter the openh264 directory: cd openh264
  • Modify the openh264/Makefile changing PREFIX to point at the full path to your ffmpeg/ffmpegbuild directory; Example: `PREFIX=/home/ubuntu/ffmpeg/ffmpegbuild`
  • Save the Makefile
  • Execute make install
  • Enter the ffmpeg directory, execute the build script below
#!/bin/bash
# Red5 Pro FFMpeg build script for Transcoding

PKG_CONFIG_PATH="$(pwd)/ffmpeg_build/lib/pkgconfig"
export PKG_CONFIG_PATH

function build_ff
{
./configure \
    --disable-everything \
    --disable-doc --disable-ffplay --disable-ffprobe \
    --disable-avdevice \
    --disable-programs \
    --enable-ffmpeg \
    --enable-libopenh264 \
    --disable-indevs --disable-outdevs \
    --disable-swscale-alpha \
    --disable-symver --disable-iconv \
    --disable-bsfs --disable-videotoolbox \
    --disable-protocols \
    --enable-protocol=file \
    --enable-protocol=rtmp \
    --disable-decoders \
    --enable-decoder=aac \
    --enable-decoder=h264 \
    --enable-decoder=h263 \
    --enable-decoder=flv \
    --enable-decoder=nellymoser \
    --disable-encoders \
    --enable-encoder=aac \
    --enable-encoder=libopenh264 \
    --disable-filters \
    --enable-filter=aresample \
    --disable-parsers \
    --enable-parser=aac \
    --enable-parser=h264 \
    --disable-demuxers \
    --enable-demuxer=flv \
    --disable-muxers \
    --enable-muxer=flv \
    --enable-muxer=mp4 \
    --enable-pic --enable-asm --enable-x86asm \
    --enable-hardcoded-tables \
    --extra-cflags="-Os -fpic $ADDI_CFLAGS -I$(pwd)/ffmpeg_build/include" \
    --extra-ldflags="$ADDI_LDFLAGS -L$(pwd)/ffmpeg_build/lib -l:libopenh264.a" \
    --pkg-config-flags="--static" \
    --disable-debug --prefix=$(pwd)/ffmpeg_build

make && make install
}
build_ff

Lastly, copy the ffmpeg executable from ffmpeg_build/bin to a known location which will be used in your conf/cloudstorage-plugin.properties file as the value for the ffmpeg.path entry. Note: the cloudstorage-plugin.properties file has GPL (x264) uncommented by default. If you are using OpenH264, then you need to uncomment the LGPL command template:

#ffmpeg.template=%s -y -report -async 1 -i %s -acodec aac -b:a 128k -ar 44100 -vcodec libopenh264 -pix_fmt yuv420p -profile:v baseline -level 3.0 %s