Recherche avancée

Sur d’autres sites (2119)

• download and fill file on fly

  4 mai 2017, par Gianluca Calabria

  I’m trying to create a service for a client which takes some audio chunks and concatenate them. For this I’m using FFmpeg. The user should also be able to download the result on the fly without waiting for the conversion/concatenation to finish. The idea is to "fill" the file as the process goes on. I cannot work my way around it, is it possible to do ? I’m using a RESTful service which calls a class like this one

  public ReadableRepresentation serveDownloadRequest(Representation entity) throws SystemInitializationException {
  
      InputStreamChannel inputStreamChannel;
  
      Form reqParameters=getQuery();
  
      try {
  
  
  
          String parameters = readStringParameter(reqParameters, AudioCutAndJoinParameters.PARAMETERS, AudioCutAndJoinParameters.PARAMETERS_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.PARAMETERS + "=" + parameters);
  
  
  
          String inputUri = readStringParameter(reqParameters, AudioCutAndJoinParameters.INPUT_URI, AudioCutAndJoinParameters.INPUT_URI_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.INPUT_URI + "=" + inputUri);
  
  
  
          String markInRelative = readStringParameter(reqParameters, AudioCutAndJoinParameters.MARKIN_ID_RELATIVE, AudioCutAndJoinParameters.MARKIN_ID_RELATIVE_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.MARKIN_ID_RELATIVE + "=" + markInRelative);
  
  
  
          String parametersString = readStringParameter(reqParameters, AudioCutAndJoinParameters.PARAMETERS_STRING, AudioCutAndJoinParameters.PARAMETERS_STRING_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.PARAMETERS_STRING + "=" + parametersString);
  
  
  
          String cmdFolder = readStringParameter(reqParameters, AudioCutAndJoinParameters.COMMAND_FOLDER, AudioCutAndJoinParameters.COMMAND_FOLDER_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.COMMAND_FOLDER + "=" + cmdFolder);
  
  
  
          Map markInIdRelativeMap=JsonEntityManager.getInstance().deserializeMap(markInRelative);
  
          Map parametersMap=JsonEntityManager.getInstance().deserializeMap(parameters);
  
          List <string> InputUri= JsonEntityManager.getInstance().deserializeList(inputUri);
  
  
  
          InputStream transcodeOutput = Services.getInstance().runAudioCutAndJoin(parametersMap,markInIdRelativeMap,InputUri,parametersString,cmdFolder);
  
          inputStreamChannel = new InputStreamChannel(transcodeOutput);
  
  
  
          ReadableRepresentation result = new ReadableRepresentation(inputStreamChannel, MediaType.AUDIO_ALL);
  
  
  
          Disposition disp = new Disposition(Disposition.TYPE_ATTACHMENT);
  
  
  
          disp.setFilename("test-cut.wav");
  
          result.setDisposition(disp);
  
  
  
          return result;
  
  </string>

  I’m using the process.getInputStream() as return of my runAudioCutAndJoin but no download happens until the process of conversion/concatenation is done. Can somebody please help me out ?

• using ffmpeg for live streaming MPEG-TS with windows media services

  14 mars 2012, par Yanniv

  I'm trying to live stream MPEG-TS source to Windows Media service.
  I found how to live stream using RTMP with this code :

  ffmpeg -y -f mpegts -i udp://@:1234 -re -vcodec libx264 -maxrate 700k
  
  -r 25 -s 640x360 -deinterlace -acodec libvo_aacenc -ab 64k -ac 1 -ar 44100 -f flv "rtmp://rtmp1.youtube.com/videolive?sparams=<stream parameters="parameters" here="here">"
  
  </stream>

  • How can I convert it to support WM9/VC1 format ?
  • Does ffmpeg support pulling of the stream or only pushing to Windows Media services ?

• FFmpeg support for libstagefright hardware decoding

  25 février 2016, par Ming Zhang

  everyone :
  I am new to ffmpeg. Recently I am working on project to port ffmpeg to android device.
  At the beginning, I compiled ffmpeg to shared libs(.so files) in a very normal way following some guides on Internet, load them into my android app. It works perfectly.

  Now I want ffmpeg to use libstagefright to fulfill HW decoding.
  The problem is, I can compile the .so libs, but when I launch my app and load those .so libs, there is always a java.lang.UnsatisfiedLinkError :
  Cannot load library : reloc_library[1314] : 114 cannot locate ’_ZN7android11MediaBufferC1Ej’

  I stuck there for a few days. Does anyone encountered any similar problems before ? It would be great if someone can give me some hint about this error.

  My steps :
  1. Compile ffmpeg-2.1.4 souce code to .so shared libs. I use the build_libstagefright script to do this, and make some modification based on some guides from Internet.

  #!/bin/bash
  
  #export NDK=/home/mingzhang/android/android-ndk-r9c
  
  export NDK=/home/mingzhang/android/android-ndk-r7
  
  if [ "$NDK" = "" ]; then
  
      echo NDK variable not set, assuming ${HOME}/android-ndk
  
      export NDK=${HOME}/android-ndk
  
  fi
  
  
  
  echo "Fetching Android system headers"
  
  git clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_frameworks_base.git ../android-source/frameworks/base
  
  git clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_frameworks_av.git ../android-source/frameworks/av
  
  git clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_frameworks_native.git ../android-source/frameworks/native
  
  git clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_hardware_libhardware.git ../android-source/hardware/libhardware
  
  git clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_system_core.git ../android-source/system/core
  
  
  
  echo "Fetching Android libraries for linking"
  
  # Libraries from any froyo/gingerbread device/emulator should work
  
  # fine, since the symbols used should be available on most of them.
  
  #if [ ! -d "../android-libs" ]; then
  
  #    if [ ! -f "../update-cm-7.0.3-N1-signed.zip" ]; then
  
  #        wget http://download.cyanogenmod.com/get/update-cm-7.0.3-N1-signed.zip -P../
  
  #    fi
  
  #    unzip ../update-cm-7.0.3-N1-signed.zip system/lib/* -d../
  
  #    mv ../system/lib ../android-libs
  
  #    rmdir ../system
  
  #fi
  
  
  
  SYSROOT=$NDK/platforms/android-9/arch-arm
  
  # Expand the prebuilt/* path into the correct one
  
  #TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64
  
  TOOLCHAIN=/home/mingzhang/android/android-ndk-r7/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86
  
  export PATH=$TOOLCHAIN/bin:$PATH
  
  ANDROID_SOURCE=../android-source
  
  ANDROID_LIBS=../android-libs
  
  ABI="armeabi-v7a"
  
  CC=$TOOLCHAIN/bin/arm-linux-androideabi-gcc
  
  #CC=$TOOLCHAIN/bin/arm-eabi-gcc-4.4.3
  
  NM=$TOOLCHAIN/bin/arm-linux-androideabi-nm
  
  #NM=$TOOLCHAIN/bin/arm-eabi-nm
  
  
  
  rm -rf ../build/stagefright
  
  mkdir -p ../build/stagefright
  
  
  
  ADDI_CFLAGS="-marm"
  
  DEST=../build/stagefright
  
  DEST="$DEST/$ABI"
  
  
  
  FLAGS="--target-os=linux --arch=arm --cpu=armv7-a --cross-prefix=arm-linux-androideabi- --cc=$CC --nm=$NM"
  
  #FLAGS="--target-os=linux --arch=arm --cpu=armv7-a --cross-prefix=arm-eabi- --cc=$CC --nm=$NM"
  
  FLAGS="$FLAGS --sysroot=$SYSROOT"
  
  #FLAGS="$FLAGS --disable-avdevice --disable-decoder=h264 --disable-decoder=h264_vdpau --enable-libstagefright-h264"
  
  FLAGS="$FLAGS --enable-shared --disable-demuxers --disable-muxers --disable-parsers --disable-avdevice --disable-filters --disable-programs --disable-encoders --disable-decoders --disable-decoder=h264 --disable-decoder=h264_vdpau --enable-decoder=libstagefright_h264 --enable-libstagefright-h264 \
  
      --enable-asm \
  
      --enable-neon \
  
      --enable-cross-compile \
  
      --enable-gpl \
  
      --disable-static \
  
      --enable-memalign-hack"
  
  
  
  EXTRA_CFLAGS="-I$DEST/include"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/native/include"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/native/include/media/openmax"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/av/include"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/base/include -I$ANDROID_SOURCE/system/core/include"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/hardware/libhardware/include"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/base/media/libstagefright"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/base/include/media/stagefright/openmax"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$NDK/sources/cxx-stl/gnu-libstdc++/4.6/include -I$NDK/sources/cxx-stl/gnu-libstdc++/4.6/libs/$ABI/include"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I$NDK/sources/cxx-stl/stlport/stlport"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -march=armv7-a -mfloat-abi=softfp -mfpu=neon -marm -mtune=cortex-a8"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -D_STLP_USE_NEWALLOC"
  
  
  
  EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -L$ANDROID_LIBS -Wl,-rpath-link,$ANDROID_LIBS -L$NDK/sources/cxx-stl/gnu-libstdc++/4.6/libs/$ABI -static-libstdc++"
  
  EXTRA_CXXFLAGS="-Wno-multichar -fno-exceptions -fno-rtti"
  
  FLAGS="$FLAGS --prefix=$DEST"
  
  
  
  mkdir -p $DEST
  
  
  
  echo $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" --extra-cxxflags="$EXTRA_CXXFLAGS" > $DEST/info.txt
  
  ./configure $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" --extra-cxxflags="$EXTRA_CXXFLAGS" | tee $DEST/configuration.txt
  
  [ $PIPESTATUS == 0 ] || exit 1
  
  make clean
  
  #make -j4 || exit 1
  
  #make -j4
  
  make install || exit 1

  2. Copy the compiled include and lib directories to my android-ndk-r7/sources/ffmpeg-2.1.4/android/arm directory. The Android.mk file under this directory is.

     LOCAL_PATH := $(call my-dir)

     include $(CLEAR_VARS)
     LOCAL_MODULE := libavcodec
     LOCAL_SRC_FILES := lib/libavcodec-55.so
     LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
     include $(PREBUILT_SHARED_LIBRARY)

     include $(CLEAR_VARS)
     LOCAL_MODULE := libavformat
     LOCAL_SRC_FILES := lib/libavformat-55.so
     LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
     include $(PREBUILT_SHARED_LIBRARY)

     include $(CLEAR_VARS)
     LOCAL_MODULE := libswscale
     LOCAL_SRC_FILES := lib/libswscale-2.so
     LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
     include $(PREBUILT_SHARED_LIBRARY)

     include $(CLEAR_VARS)
     LOCAL_MODULE := libavutil
     LOCAL_SRC_FILES := lib/libavutil-52.so
     LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
     include $(PREBUILT_SHARED_LIBRARY)

     include $(CLEAR_VARS)
     LOCAL_MODULE := libavfilter
     LOCAL_SRC_FILES := lib/libavfilter-3.so
     LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
     include $(PREBUILT_SHARED_LIBRARY)

     include $(CLEAR_VARS)
     LOCAL_MODULE := libwsresample
     LOCAL_SRC_FILES := lib/libswresample-0.so
     LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
     include $(PREBUILT_SHARED_LIBRARY)

  3. Under the jni directory of my android app, the Android.mk is.

     LOCAL_PATH:= $(call my-dir)
     
     include $(CLEAR_VARS)
     
     
     
     LOCAL_MODULE    := libripple
     
     #LOCAL_CFLAGS    := -Werror
     
     LOCAL_SRC_FILES := entrypoint.cpp scene.cpp
     
     LOCAL_LDLIBS    := -llog -lGLESv2 -lm
     
     
     
     include $(BUILD_SHARED_LIBRARY)
     
     
     
     include $(CLEAR_VARS)
     
     
     
     LOCAL_MODULE    := myfflib
     
     LOCAL_SRC_FILES := fflib.c
     
     LOCAL_LDLIBS := -L/home/mingzhang/ffmpeg_android/android-libs -llog -ljnigraphics -lz -landroid -ldl -lm -llog -lgcc -lc -lstagefright -lmedia -lutils -lbinder #-lstdc++
     
     LOCAL_SHARED_LIBRARIES := libavformat libavcodec libswscale libavutil libutils libstagefright libbinder libmedia libstdc++-6
     
     
     
     include $(BUILD_SHARED_LIBRARY)
     
     $(call import-module,ffmpeg-2.1.4/android/arm)

     And the Application.mk is :

     APP_ABI=armeabi-v7a
     
     #APP_STL=gnustl_static
     
     APP_STL=stlport_static

  I am not sure what else materials you need, if anything is missing, please let me know, I will upload it.
  Thank you guys very much !!!