系統是Debian 32位

Linux raspberrypi 5.10.11-v7+ #1399 SMP Thu Jan 28 12:06:05 GMT 2021 armv7l

先安裝X264

wget https://code.videolan.org/videolan/x264/-/archive/master/x264-master.tar.gz

tar zxvf x264-master.tar.gz
cd x264-master/
./configure --host=arm-unknown-linux-gnueabi --enable-static --disable-opencl --enable-shared
make 
 
-j4
sudo make install

下載ffmpeg

git clone git://source.ffmpeg.org/ffmpeg.git
cd ffmpeg/

./configure --arch=armv7l --target-os=linux \
--enable-gpl --enable-libx264 \
--enable-nonfree \
--enable-omx \
--enable-omx-rpi \
--enable-encoder=h264_omx \
--enable-mmal \
--enable-hwaccel=h264_mmal \
--extra-ldflags="-latomic" \
 

--enable-decoder=h264_mmal

make -j2  (這一步耗時較長, 約1小時)
sudo make install

測試一下

ffmpeg -ss 00:00:03 -i /home/pi/Videos/test.mov -y -f image2 -t 0.001 /home/pi/Videos/test2.jpg

成功

問題記錄

1/當安裝ffmpeg時, make -j2編譯經過差不多1小時後出現報錯

嘗試解決:

sudo apt-get install libsdl2-dev

辦法 ./configure最後加上如下配置(成功)

--extra-ldflags="-latomic"