GitHub CI: build own x264 [Linux]

In order to support 10-bit codecs.

.github/scripts/Linux/download_build_ffmpeg.sh

@@ -2,6 +2,8 @@
 
 git clone --depth 1 https://git.ffmpeg.org/ffmpeg.git /var/tmp/ffmpeg
 cd /var/tmp/ffmpeg
+( git clone --depth 1 -b nasm-2.13.xx https://github.com/sezero/nasm.git && cd nasm && ./autogen.sh && ./configure && make nasm.1 && make ndisasm.1 && make && sudo make install )
+( git clone --depth 1 http://git.videolan.org/git/x264.git && cd x264 && ./configure --disable-static --enable-shared && make && sudo make install )
 ( git clone -b sdk/8.1 https://git.videolan.org/git/ffmpeg/nv-codec-headers.git && cd nv-codec-headers && make && sudo make install )
 ( git clone --depth 1 https://aomedia.googlesource.com/aom && mkdir -p aom/build && cd aom/build && cmake -DBUILD_SHARED_LIBS=1 .. && make && sudo make install )
 ./configure --disable-static --enable-shared --enable-gpl --enable-libx264 --enable-libx265 --enable-libopus --enable-nonfree --enable-nvenc --enable-libaom --enable-libvpx --enable-libspeex --enable-libmp3lame

.github/scripts/Linux/install_ffmpeg.sh

@@ -1,6 +1,8 @@
 #!/bin/bash -eux
 
 cd /var/tmp/ffmpeg
+( cd nasm && sudo make install )
+( cd x264 && sudo make install )
 ( cd nv-codec-headers && sudo make install )
 ( cd aom/build && sudo make install )
 sudo make install

.github/scripts/Linux/prepare.sh

@@ -21,7 +21,12 @@ sudo apt install libx11-dev
 sudo apt install libsdl2-dev
 sudo apt install libssl-dev
 sudo apt install portaudio19-dev libjack-jackd2-dev libasound-dev libv4l-dev
+
+# for FFmpeg
 sudo apt build-dep ffmpeg
+sudo apt-get remove 'libx264*' nasm
+sudo apt --no-install-recommends install asciidoc xmlto
+
 sudo apt install libopencv-dev
 sudo apt install libglib2.0-dev libcurl4-nss-dev
 ( mkdir gpujpeg/build && cd gpujpeg/build && CC=$CUDA_HOST_COMPILER cmake .. && make && sudo make install && sudo ldconfig )

.github/workflows/ccpp.yml

@@ -84,7 +84,7 @@ jobs:
       uses: actions/cache@v1
       with:
         path: '/var/tmp/ffmpeg'
-        key: cache-ffmpeg-6
+        key: cache-ffmpeg-7
     - name: Build FFmpeg
       if: steps.cache-ffmpeg.outputs.cache-hit != 'true'
       run: .github/scripts/Linux/download_build_ffmpeg.sh