编译和安装FFmpeg

获取FFmpeg源码，合入鲲鹏HW265视频编码器Patch包，添加相关搜索路径后进行HW265编码器功能验证。

1. 请参见软件环境获取鲲鹏HW265视频编码器Patch包ffmpeg-7.0.1_plugin_for_hw265_enc.patch和FFmpeg源码包ffmpeg-7.0.1.tar.gz。
2. 将Patch包和源码包拷贝至“~/dependency/”目录，并解压ffmpeg-7.0.1.tar.gz源码包。

   1 2	cd ~/dependency/ tar -zxvf ffmpeg-7.0.1.tar.gz

3. 进入“ffmpeg-7.0.1”目录，并将鲲鹏HW265视频编码器Patch包拷贝至当前目录。

   1 2	cd ffmpeg-7.0.1 cp ../ffmpeg-7.0.1_plugin_for_hw265_enc.patch .

4. 合入鲲鹏HW265视频编码器Patch包。

   1	patch -p1 < ffmpeg-7.0.1_plugin_for_hw265_enc.patch

5. 将HW265视频编码器的动态链接库libhw265.so拷贝到“/usr/local/lib”目录。

   1	cp ~/dependency/lib/libhw265.so /usr/local/lib

6. 将HW265视频编码器的头文件hwe_api.h拷贝到“/usr/local/include”目录。

   1	cp ~/dependency/include/hwe_api.h /usr/local/include

7. 生成hw265.pc文件。

   1	sudo vi /usr/local/lib/pkgconfig/hw265.pc

   1. 在hw265.pc文件中写入以下内容。

      Name: hw265enc
      Description: Huawei H.265 video encoder HW265 1.0.0
      Version: 1.0.0
      Libs: -L/usr/local/lib -lhw265
      Libs.private: -lm -lpthread
      Cflags: -I/usr/local/include

   2. 按“Esc”键，输入:wq!，按“Enter”保存并退出编辑。
8. 添加已安装库搜索路径。

   1	export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH

9. 编译安装。

   1 2 3

   ./configure --enable-shared --enable-libhw265 --enable-gpl make sudo make install

10. 增加动态库搜索路径。

    1	export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

11. 添加可执行文件搜索路径。

    1	export PATH=/usr/local/bin:$PATH

12. 验证是否已成功安装。

    1	ffmpeg -h encoder=libhw265

    回显内容如下：

    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

    ffmpeg version 7.0 Copyright (c) 2000-2024 the FFmpeg developers built with gcc 10.3.1 (GCC) configuration: --enable-shared --enable-libhw265 --enable-gpl libavutil 59. 8.100 / 59. 8.100 libavcodec 61. 3.100 / 61. 3.100 libavformat 61. 1.100 / 61. 1.100 libavdevice 61. 1.100 / 61. 1.100 libavfilter 10. 1.100 / 10. 1.100 libswscale 8. 1.100 / 8. 1.100 libswresample 5. 1.100 / 5. 1.100 libpostproc 58. 1.100 / 58. 1.100 Encoder libhw265 [libhw265 H.265 / HEVC]: General capabilities: dr1 delay threads Threading capabilities: other Supported pixel formats: yuv420p yuvj420p yuv422p yuvj422p yuv444p yuvj444p gbrp gray libhw265 AVOptions: -channel <int> E..V....... Channel ID for encoder[0, 65535], default 0 (from -1 to INT_MAX) (default -1) -log_level <int> E..V....... Log level. 0:off 1:error 2:warning 3:info 4:debug, default 1 (from -1 to 4) (default -1) -delay <int> E..V....... Number of frames for encoder analysis[bframes, 150], default 25 (from -1 to INT_MAX) (default -1) -adap_I <int> E..V....... Adaptive insert I frames base on scenecut. 0:off 1:on, default 0 (from -1 to 1) (default -1) -analysis_threads <int> E..V....... Number of frames for concurrent analysis. [1, 48], default 5 (from -1 to 48) (default -1) -bframe_ref <int> E..V....... B frames used as reference frame. 0:off 1:on, default 1 (from -1 to 255) (default -1) -frame_threads <int> E..V....... Number of concurrently encoded frame threads[1, 38], default 12 (from -1 to 38) (default -1) -wpp_threads <int> E..V....... Number of concurrently encoded rows threads[1, 20], default 8 (from -1 to 20) (default -1) -profile <int> E..V....... Only support main profile. default 0 (from -1 to INT_MAX) (default -1) -qualityset <int> E..V....... Quality level of the encoder. {2, 3, 5, 6} from slow to fast, default 3 (from -1 to 6) (default -1) -keyint <int> E..V....... Distance between I-frames, not less than 1, default 150 (from -1 to INT_MAX) (default -1) -bframe_nums <int> E..V....... Max consecutive B-frames, [0,7], default 7 (from -1 to 7) (default -1) -rc <int> E..V....... Rate control mode, if not in {0, 1, 2}, rc_mode will be default, default is 0 (from -1 to 2) (default -1) -qp <int> E..V....... The initial qp used by encoder[1, 51], default 18 (from -1 to 51) (default -1) -abr_bitrate <int> E..V....... average bitrate (kbps), if not in [40kbps, 300000kbps], bitrate will be default, default is 2000 (from -1 to INT_MAX) (default -1) -crf <int> E..V....... crf level, if not in [0, 51], crf will be default, default is 23 (from -1 to 51) (default -1) -fps_num <int> E..V....... playback framerate of the output video, if not in (0, 120], fps will be default, default is 25 (from -1 to 120) (default -1)