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• Best config for ffmpeg to convert MP3 file only

  25 février 2018, par Ata

  I want to compile FFMPEG to support conversion from MP3 to WAV and WAV to MP3.

  as I only need that task, and output compiled size is really matter to me, Please correct me best compile config that accompilesh my requirement.

  here is full config file :

  function build_ffmpeg
  
  {
  
      echo "Starting build ffmpeg for $ARCH"
  
      cd ffmpeg
  
      ./configure --target-os=linux \
  
          --prefix=$PREFIX \
  
          --enable-cross-compile \
  
          --extra-libs="-lgcc" \
  
          --arch=$ARCH \
  
          --cc=$CC \
  
          --cross-prefix=$CROSS_COMPILE \
  
          --nm=$NM \
  
          --sysroot=$PLATFORM \
  
          --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums  -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \
  
          --disable-shared \
  
          --enable-static \
  
          --enable-runtime-cpudetect \
  
          --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -nostdlib -lc -lm -ldl -llog -L$PREFIX/lib" \
  
          --extra-cflags="-I$PREFIX/include" \
  
          --disable-everything \
  
          --enable-pthreads \
  
          --enable-libass \
  
          --enable-libvo-aacenc \
  
          --enable-libvo-amrwbenc \
  
          --enable-hwaccel=h264_vaapi \
  
          --enable-hwaccel=h264_vaapi \
  
          --enable-hwaccel=h264_dxva2 \
  
          --enable-hwaccel=mpeg4_vaapi \
  
          --enable-demuxer=mov \
  
          --enable-demuxer=h264 \
  
          --enable-demuxer=mpegvideo \
  
          --enable-demuxer=h263 \
  
          --enable-demuxer=mpegps \
  
          --enable-demuxer=mjpeg \
  
          --enable-demuxer=rtsp \
  
          --enable-demuxer=rtp \
  
          --enable-demuxer=hls \
  
          --enable-demuxer=matroska \
  
          --enable-muxer=rtsp \
  
          --enable-muxer=mp4 \
  
          --enable-muxer=mov \
  
          --enable-muxer=mjpeg \
  
          --enable-muxer=matroska \
  
          --enable-protocol=crypto \
  
          --enable-protocol=jni \
  
          --enable-protocol=file \
  
          --enable-encoder=libvo_amrwbenc \
  
          --enable-decoder=amrwb \
  
          --enable-muxer=mp2 \
  
          --enable-bsfs \
  
          --enable-decoders \
  
          --enable-encoders \
  
          --enable-parsers \
  
          --enable-hwaccels \
  
          --enable-muxers \
  
          --enable-avformat \
  
          --enable-avcodec \
  
          --enable-avresample \
  
          --enable-zlib \
  
          --disable-doc \
  
          --disable-ffplay \
  
          --disable-ffmpeg \
  
          --disable-ffplay \
  
          --disable-ffprobe \
  
          --disable-ffserver \
  
          --disable-avfilter \
  
          --disable-avdevice \
  
          --enable-nonfree \
  
          --enable-version3 \
  
          --enable-memalign-hack \
  
          --enable-asm \
  
          $ADDITIONAL_CONFIGURE_FLAG
  
      make clean
  
      make -j4 install
  
      make clean
  
  
  
      cd ..
  
      echo "FINISHED ffmpeg for $ARCH"
  
  }
  
  
  
  function build_one {
  
      echo "Starting build one for $ARCH"
  
      cd ffmpeg
  
      ${LD} -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$PREFIX/lib  -soname $SONAME -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o $OUT_LIBRARY -lavcodec -lavformat -lavresample -lavutil -lswresample -lass -lfreetype -lfribidi -lswscale -lvo-aacenc -lvo-amrwbenc -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker -zmuldefs $PREBUILT/lib/gcc/$EABIARCH/$COMPILATOR_VERSION/libgcc.a
  
      cd ..
  
      echo "FINISHED one for $ARCH"
  
  }

• I want enable Nvidia CUDA compiler and follow (L)GPL both (ffmpeg 6.0)

  3 mai 2023, par 이아름

  It would be nice to follow (L)GPL regulations and support cuda, but if you put the option (—enable-cuda-nvcc), they told you to add —enable-nonfree

  


  enter image description here

  


  
./configure --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32- --enable-shared --enable-static --enable-ffplay --enable-version3 --enable-nvenc --enable-nvdec --extra-ldflags='-static-libgcc -L/usr/local/cuda/lib64' --enable-cuvid --enable-cuda --enable-d3d11va --enable-ffnvcodec --extra-cflags=-I/usr/local/cuda/include --enable-cuda-nvcc


  


  If I put "—enable-version3 —enable-cuda-nvcc —enable-nonfree", can the built result follow the (L)GPL regulations ?

  


• Hardware Accelerated h264 decoding using ffmpeg, OpenCV

  17 juillet 2020, par Richard Macwan

  I am working on a Video analytics application where I have to decode an RTSP stream to give IplImage frames which are then fed into my analytics pipeline.
Now, the OpenCV VideoCapture structure allows me to extract frames from an RTSP stream(i think it uses ffmpeg to do so) but the performance is not so great. It needs to work in real time.

  



  I also went ahead and wrote my own ffmpeg decoder. But just like OpenCv, performance with RTSP streams is not good. Lots of frames are dropped. However, decoding from a local file works fine.I am still working on refining the code though.

  



  What I need help with is this. First, can I use hardware accelerated decoding here to improve performance ? My app is supposed to be cross platform, so I might need to use Directx VA(windows) and VAAPI(linux).If yes,then is there any place where I can learn how to implement hardware acceleration in code especially for ffmpeg decoding of h264 ?