Unbuntu18.04 编译FFmpeg 支持 QSV 硬编解码

在Linux下，由于FFmpeg软解码CPU占用过高，所以打算使用h264_qsv硬解码，本文并非原创，主要参考以下文章，在此记录下编译过程，以便日后使用。

参考文章：

• https://zhuanlan.zhihu.com/p/62246545

• http://blog.chinaunix.net/uid-21501855-id-5835281.html

编译过程： 

1. 下载MediaSDK 20.1.1 相关依赖库  https://github.com/Intel-Media-SDK/MediaSDK/releases/tag/intel-mediasdk-20.1.1
   1.  
2. 安装 libva 
   1. ./autogen.sh --prefix=/opt/intel/libva --libdir=/opt/intel/libva/lib
   2. make -j8 & sudo make install
   3. export PKG_CONFIG_PATH=/opt/intel/libva/lib/pkgconfig
   4. export LD_LIBRARY_PATH=/opt/intel/libva/lib:$LD_LIBRARY_PATH
   5. sudo ldconfig
   6. 
3. 安装libva-util
   1. ./autogen.sh --prefix=/opt/intel/libva-utils  --libdir=/opt/intel/libva-utils/lib
   2. make -j8 & sudo make install
   3. 
4. 安装media-driver
   1. 分别解压 gmmlib-intel-gmmlib-20.1.1.zip和 media-driver-intel-media-20.1.1.zip
   2. cd gmmlib-intel-gmmlib-20.1.1.zip
   3. mkdir build & cd build
   4. cmake .. & make -j8 & sudo make install
   5. 创建gmmlib-mediadriver目录
   6. cd gmmlib-mediadriver

   7. cmake ../media-driver \
          -DMEDIA_VERSION="2.0.0" \
          -DBUILD_ALONG_WITH_CMRTLIB=1 \
          -DBS_DIR_GMMLIB=`pwd`/../gmmlib/Source/GmmLib/ \
          -DBS_DIR_COMMON=`pwd`/../gmmlib/Source/Common/ \
          -DBS_DIR_INC=`pwd`/../gmmlib/Source/inc/ \
          -DBS_DIR_MEDIA=`pwd`/../media-driver \
          -DCMAKE_INSTALL_PREFIX=/opt/intel/media-driver \
          -DCMAKE_INSTALL_LIBDIR=/opt/intel/media-driver/lib \
          -DINSTALL_DRIVERS_SYSCONF=OFF \
          -DLIBVA_DRIVERS_PATH=/opt/intel/media-driver/lib/dri
      
      make -j8
      sudo make install

      8. 

5. 配置环境变量

   1. export LIBVA_DRIVER_NAME=iHD

   2. export LIBVA_DRIVERS_PATH=/opt/intel/media-driver/lib/dri

6. 验证

   1. cd /opt/intel/libva-utils/bin

   2. ./vainfo

7. 安装intel media SDK

   mkdir build
   
   cd build
   
   make -j8 & sudo make install
   
   export LD_LIBRARY_PATH=/opt/intel/mediasdk/lib:$LD_LIBRARY_PATH
   
   export MFX_HOME=/opt/intel/mediasdk/lib/pkgconfig
   
   export PKG_CONFIG_PATH=/opt/intel/mediasdk/lib/pkgconfig:$PKG_CONFIG_PATH
   
   sudo ldconfig
   
   echo $LIBVA_DRIVER_NAME #应该输出 iHD
   
   echo $LIBVA_DRIVERS_PATH #应该输出 /opt/intel/media-driver/lib/dri
   
   echo $MFX_HOME #应该输出 /opt/intel/mediasdk/lib/pkgconfig
   
   echo $PKG_CONFIG_PATH #应该输出 "/opt/intel/mediasdk/lib/pkgconfig:/opt/intel/libva/lib/pkgconfig:"这部分内容。
   
   echo $LD_LIBRARY_PATH #输出的内容应该含有 "/opt/intel/mediasdk/lib:/opt/intel/libva/lib:"

    

8. 编译 FFmpeg n4.3

   1. 修改libavformat/movenc.c 支持G711

   2. 修改 movenc.c

   3.  static int mov_write_audio_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
      
          if (track->mode == MODE_MOV) {
                  avio_wb16(pb, track->par->channels);
                  if (track->par->codec_id == AV_CODEC_ID_PCM_U8 ||
                      track->par->codec_id == AV_CODEC_ID_PCM_S8)
                      avio_wb16(pb, 8); /* bits per sample */
                  else if (track->par->codec_id == AV_CODEC_ID_ADPCM_G726)
                      avio_wb16(pb, track->par->bits_per_coded_sample);
                  else
                      avio_wb16(pb, 16);
                  avio_wb16(pb, track->audio_vbr ? -2 : 0); /* compression ID */
              } else { /* reserved for mp4/3gp */
                  avio_wb16(pb, track->par->channels > 0 ?
                                track->par->channels : 1);
                  track->par->bits_per_coded_sample = av_get_bits_per_sample(track->par->codec_id);
                  avio_wb16(pb, track->par->bits_per_coded_sample > 0 ?
                                track->par->bits_per_coded_sample : 16);
                  avio_wb16(pb, 0);
              }
      
      
            avio_wb16(pb, 0); /* packet size (= 0) */
              if (track->par->codec_id == AV_CODEC_ID_OPUS)
                  avio_wb16(pb, 48000);
              else
                  avio_wb16(pb, track->par->sample_rate <= UINT16_MAX ?
                                track->par->sample_rate : 0);
              avio_wb16(pb, 0); /* Reserved */
      
      
      static unsigned int mov_find_codec_tag(AVFormatContext *s, MOVTrack *track)
      {
          int tag;
      
      
          if (track->mode == MODE_MP4 || track->mode == MODE_PSP)
              tag = track->par->codec_tag;
          else if (track->mode == MODE_ISM)
              tag = track->par->codec_tag;
          else if (track->mode == MODE_IPOD) {
              if (!av_match_ext(s->filename, "m4a") &&
                  !av_match_ext(s->filename, "m4v") &&
                  !av_match_ext(s->filename, "m4b"))
                  av_log(s, AV_LOG_WARNING, "Warning, extension is not .m4a nor .m4v "
                         "Quicktime/Ipod might not play the file\n");
              tag = track->par->codec_tag;
          } else if (track->mode & MODE_3GP)
              tag = track->par->codec_tag;
          else if (track->mode == MODE_F4V)
              tag = track->par->codec_tag;
          else
              tag = mov_get_codec_tag(s, track);
      
      
          if (tag == 0){
              tag = mov_get_codec_tag(s, track);
          }
      
      
          return tag;
      }

       

   4. 编译FFmpeg：

      1. ./configure --enable-shared \
                       --disable-x86asm \
                       --disable-lzma \
                       --enable-pic \
                       --extra-cflags=-fPIC \
                       --extra-cxxflags=-fPIC \
                       --enable-libmfx \
                       --enable-nonfree \
                       --enable-encoder=h264_qsv \
                       --enable-decoder=h264_qsv \
                       --enable-libfreetype \
                       --enable-libfontconfig \
                       --enable-libfribidi \
                       --enable-encoder=pcm_alaw \
                       --enable-decoder=pcm_alaw \
                       --prefix=/opt/ffmpeg \
                       --libdir=/opt/ffmpeg/lib \
         
         make -j8
         sudo make install

          

9. 测试

   1. ./ffplay -vcodec h264_qsv -i test.mp4

   2. ./ffmpeg -y -i 1.mp4 -pix_fmt nv12 -c:v h264_qsv -profile:v baseline -preset fast -b:v 4000k -an test_output.mp4

 

 

参考：

1. http://blog.chinaunix.net/uid-21501855-id-5835281.html
2. https://zhuanlan.zhihu.com/p/62246545

注：

1. 编译所有流程最好在一个进程中进行
2. LIBVA_DRIVER_NAME和LIBVA_DRIVER_PATH, 可配置系统环境 etc/environment
3. MediaSDK 20.1.1 亲测 FFmpeg n4.3 h264_qsv成功 ，FFmpeg n4.1h264_qsv失败

    [h264_qsv @ 0x55ef1dc72040] Low power mode is unsupported
    [h264_qsv @ 0x55ef1dc72040] Current frame rate is unsupported
    [h264_qsv @ 0x55ef1dc72040] Current picture structure is unsupported
    [h264_qsv @ 0x55ef1dc72040] Current resolution is unsupported
    [h264_qsv @ 0x55ef1dc72040] Current pixel format is unsupported
    [h264_qsv @ 0x55ef1dc72040] some encoding parameters are not supported by the QSV runtime. Please double check the input parameters.
    Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

 

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