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trying ffmpeg on S912 H96 pro+ DEV image 20191025


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Hello all,


i download the new DEV image 20191025  ( kernel 5.4.0 rc4 )

For the dtb is use : meson-gxm-s912-kiii-pro.dtb ( h96 pro+ hardware like the k3 pro )

in the file : uEnv.ini

change this line :



install packages :

sudo apt-get install nasm

sudo apt-get install yasm

apt install autoconf automake cmake libtool git checkinstall nasm yasm libass-dev libfreetype6-dev libsdl2-dev p11-kit libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev libxcb-xfixes0-dev pkg-config texinfo wget zlib1g-dev libchromaprint-dev frei0r-plugins-dev gnutls-dev ladspa-sdk libcaca-dev libcdio-paranoia-dev libcodec2-dev libfontconfig1-dev libfreetype6-dev libfribidi-dev libgme-dev libgsm1-dev libjack-dev libmodplug-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libopenjp2-7-dev libopenmpt-dev libopus-dev libpulse-dev librsvg2-dev librubberband-dev librtmp-dev libshine-dev libsmbclient-dev libsnappy-dev libsoxr-dev libspeex-dev libssh-dev libtesseract-dev libtheora-dev libtwolame-dev libv4l-dev libvo-amrwbenc-dev libvorbis-dev libvpx-dev libwavpack-dev libwebp-dev libx264-dev libx265-dev libxvidcore-dev libxml2-dev libzmq3-dev libzvbi-dev liblilv-dev libopenal-dev opencl-dev libjack-dev v4l-utils


compile aom :

cd ~/ffmpeg_sources

mkdir aom

cd aom

git clone https://aomedia.googlesource.com/aom cmake aom/ -DBUILD_SHARED_LIBS=1

make -j8

sudo checkinstall -y --deldoc=yes --pkgversion=1.0.0 cd ..


Compile ffmpeg :

mkdir -p ~/ffmpeg_sources ~/bin

cd ~/ffmpeg_sources && \
wget -O ffmpeg-snapshot.tar.bz2 https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 && \
tar xjvf ffmpeg-snapshot.tar.bz2 && \
cd ffmpeg && \
PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
  --prefix="$HOME/ffmpeg_build" \
  --pkg-config-flags="--static" \
  --extra-cflags="-I$HOME/ffmpeg_build/include" \
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
  --extra-libs="-lpthread -lm" \
  --bindir="$HOME/bin" \
  --enable-gpl \
  --enable-libaom \
  --enable-libass \
  --enable-libfdk-aac \
  --enable-libfreetype \
  --enable-libmp3lame \
  --enable-libopus \
  --enable-libvorbis \
  --enable-libvpx \
  --enable-libx264 \
  --enable-libx265 \
--enable-version3 \
--enable-shared --enable-small --enable-avisynth --enable-chromaprint \
--enable-frei0r --enable-gmp --enable-ladspa \
--enable-libaom --enable-libass --enable-libcaca --enable-libcdio \
--enable-libcodec2 --enable-libfontconfig --enable-libfreetype \
--enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack \
--enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb \
--enable-libopencore-amrwb --enable-libopencore-amrwb \
--enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse \
--enable-librubberband --enable-libshine \
--enable-libsnappy --enable-libsoxr --enable-libspeex \
--enable-libssh --enable-libtheora \
--enable-libtwolame --enable-libvo-amrwbenc \
--enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp \
--enable-libx264 --enable-libx265 --enable-libxvid \
--enable-libzvbi --enable-lv2 \
--enable-openal --enable-opencl --enable-opengl --enable-libdrm \
--enable-nonfree --enable-libfdk-aac \
  --enable-nonfree && \
PATH="$HOME/bin:$PATH" make -j8 && \
make install && \
hash -r


some changes :



add this line in this file


launch :


the ffmpeg bin is on : /root/bin/


test sofware decode and encode ( h264 1920*1080 to 320*240 )

/root/bin/ffmpeg -vcodec h264 -i -s 320x240 /tmp/test.avi

(works but not enough cpu , don't forget the s912 have 8 arm A53 core BUT 4 at 1600 Ghz and 4 at 1 Ghz AND IT'S NOT 8 core at 2Ghz ... so we need speed 1 , we have max 1.1 and 0.7 with S912 without hw decoder  )


my best conf for software decoder/encoder :

/root/bin/ffmpeg -threads 16 -i -b:a 32k -b:v 300k -s 320x240 /tmp/test.avi

or /root/bin/ffmpeg -benchmark  -filter_threads 16 -threads 16 -thread_queue_size 3276800 -i -ac 1 -ar 22050 -b:a 8k -max_muxing_queue_size 9999999 -b:v 275k -s 320x240 /home/martos/test.avi


test hardware decode and software decode ( h264 1920*1080 to 320*240 )

 /root/bin/ffmpeg -vcodec h264_v4l2m2m -i -s 160x120 /tmp/test.avi


[h264_v4l2m2m_decoder @ 0xaaaac47b5b00] Could not find a valid device
[h264_v4l2m2m @ 0xaaaac477fe70] can't configure decoder


do you know if this kernel have the change for Hardware aml decoder ?




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just for information, in dmesg repeat when i made my test  :

[29560.295075] meson-dw-hdmi c883a000.hdmi-tx: channels=2 sample_width=16 sample_rate=44100
[29560.295134] meson_aiu_i2s_dma_hw_params: physical_width=16 buffer_bytes=17664 period_bytes=4352
[29582.217953] meson-aiu-i2s meson-aiu-i2s.4.auto: Failed to set sysclk to 0Hz

and i think i have trouble with the sound ( horrible )

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