git clone https://code.videolan.org/videolan/x264.git
cd x264
./configure --disable-asm
platform: X86_64
byte order: little-endian
system: LINUX
cli: yes
libx264: internal
shared: no
static: no
bashcompletion: yes
asm: no
interlaced: yes
avs: avxsynth
lavf: no
ffms: no
mp4: no
gpl: yes
thread: posix
opencl: yes
filters: crop select_every
lto: no
debug: no
gprof: no
strip: no
PIC: no
bit depth: all
chroma format: all

make -j4

make install

下载x264并编译

git clone git://git.videolan.org/x264.git
./configure --enable-shared --enable-static --prefix=/usr
make -j8
make install
解释一下，指定/usr的话，安装好，不用配置路径。
j8的目的是编译起来，用8路进行make，节省编译时间

2 把libx264编译到ffmpeg

./configure --enable-gpl --enable-libx264 --prefix=/root/extest/webMP4/ffmpeg
make -j8
make instal

就可以了
Referenced from:https://blog.csdn.net/dong_beijing/article/details/78366732

使用bash执行就可以了。

export OPENCV_LOG_LEVEL=DEBUG
export OPENCV_VIDEOIO_DEBUG=1

示例：

./opencv-demo
OpenCV4 Example.
OpenCV Version = 4.5.3
[DEBUG:0] global /home/const/opencv-4.5.3/modules/videoio/src/videoio_registry.cpp (191) VideoBackendRegistry VIDEOIO: Builtin backends(8): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); V4L2(970); CV_IMAGES(960); CV_MJPEG(950); FIREWIRE(940); UEYE(930)
[DEBUG:0] global /home/const/opencv-4.5.3/modules/videoio/src/videoio_registry.cpp (215) VideoBackendRegistry VIDEOIO: Available backends(8): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); V4L2(970); CV_IMAGES(960); CV_MJPEG(950); FIREWIRE(940); UEYE(930)
[ INFO:0] global /home/const/opencv-4.5.3/modules/videoio/src/videoio_registry.cpp (217) VideoBackendRegistry VIDEOIO: Enabled backends(8, sorted by priority): FFMPEG(1000); GSTREAMER(990); INTEL_MFX(980); V4L2(970); CV_IMAGES(960); CV_MJPEG(950); FIREWIRE(940); UEYE(930)
[ WARN:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap.cpp (126) open VIDEOIO(FFMPEG): trying capture filename='1.mp4' ...
[DEBUG:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap_ffmpeg_impl.hpp (1022) open FFMPEG: stream[0] is video stream with codecID=27 width=2560 height=1440
[DEBUG:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap_ffmpeg_hw.hpp (929) HWAccelIterator FFMPEG: allowed acceleration types (vaapi): 'vaapi.iHD'
[DEBUG:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap_ffmpeg_hw.hpp (947) HWAccelIterator FFMPEG: disabled codecs: 'av1.vaapi,av1_qsv,vp8.vaapi,vp8_qsv'
[DEBUG:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap_ffmpeg_impl.hpp (1054) open FFMPEG: trying to configure H/W acceleration: 'vaapi.iHD'
[ INFO:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap_ffmpeg_hw.hpp (265) hw_check_device FFMPEG: Skipping 'vaapi' video acceleration on the following device name as not matching substring 'iHD':
[DEBUG:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap_ffmpeg_impl.hpp (1063) open FFMPEG: ... can't create H/W device: 'vaapi.iHD'
[ERROR:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap_ffmpeg_impl.hpp (1109) open VIDEOIO/FFMPEG: Failed to initialize VideoCapture
[ WARN:0] global /home/const/opencv-4.5.3/modules/videoio/src/cap.cpp (149) open VIDEOIO(FFMPEG): can't create capture
ERROR! Unable to open camera

中国央行：维护住房消费者合法权益 坚持不将房地产作为短期刺激经济手段 | 路透 update:2021-9-30
中国央行、银保监会周三联合召开房地产金融工作座谈会称，金融机构要按照法治化、市场化原则，配合相关部门和地方政府共同维护房地产市场的平稳健康发展，维护住房消费者合法权益。

央行网站新闻稿援引会议称，坚持不将房地产作为短期刺激经济的手段，持续落实好房地产长效机制，加快完善住房租赁金融政策体系。

金融部门要围绕“稳地价、稳房价、稳预期”目标，准确把握和执行好房地产金融审慎管理制度，坚持房子是用来住的、不是用来炒的定位。

会议认为，近年来，金融部门全面落实房地产长效机制，稳妥实施房地产金融审慎管理制度，保持房地产金融政策连续稳定，在服务实体经济、推动经济转型升级和促进房地产市场平稳健康发展中发挥了积极作用。

中国央行此前召开三季度货币政策例会强调，稳健货币政策要灵活精准合理适度，同时提及维护房地产市场健康发展。分析师认为，货币政策稳健偏宽基调依旧延续，但对经济形势预期乐观程度降低，同时新增房地产行业表述谨防局部风险冲击，或预示边际微调房地产政策。

Referenced from:https://cn.reuters.com/article/pboc-housing-0929-wedn-idCNKBS2GQ00Y?il=0

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