husterzhao

Hi I use Ubuntu18.04, and ffmpeg-4.0.1 source code, and use `./configure --disable-x86asm --disable-doc --prefix=output` to make, make install I use `gcc -o build/hello_world -g -Wall 0_hello_world.c -I./include -L./lib -lavformat -lavcodec...

sudo apt-add-repository ppa:ubuntu-sdk-team/ppa sudo apt-add-repository ppa:canonical-qt5-edgers/ubuntu1204-qt5 sudo apt-get update sudo apt-get install qtmultimedia5-dev qtbase5-dev libqt5widgets5 libqt5core5 libqt5gui5 libqt5multimedia5 libqt5multimediawidgets5 libqt5opengl5 libav-tools libavcodec-dev libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev libpostproc-dev libswscale-dev cd libdash/libdash/qtsampleplayer...