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• HTTP Live Streaming Mac app

  4 mars 2013, par Diederik Hoogenboom

  I am developing a Mac app which needs to provide a HTTP Live Stream (just the last 2 seconds or so) for the main screen (Desktop).

  I was thinking of the following process :

  1. Create a AVCaptureSession with a AVCaptureScreenInput as input (sessionPreset = AVCaptureSessionPresetPhoto)
  2. Add a AVCaptureVideoDataOutput output to the session
  3. Capture the frames (in kCVPixelFormatType_32BGRA format) in captureOutput:didDropSampleBuffer:fromConnection : and write these to a ffmpeg process for segmenting (using a pipe or something) that creates the MPEG-TS and playlist files.
  4. Use an embedded HTTP server to server up the segmented files and playlist file.

  Is this the best approach and is there is no way to circumvent the ffmpeg part for encoding and segmenting the video stream ?

  What is the best way to pipe the raw frames to ffmpeg ?

• jayHS android ffmpeg commandline failed to build because ./configure

  22 novembre 2013, par Blaze Tama

  First, im a beginner in FFMPEG so please bear with me.

  I found an interesting project here. I was trying to build it using ./build.sh but it always said ./configure: No such file or directory.

  This is the build.sh file :

  #!/bin/bash
  
  
  
  # set the base path to your Android NDK (or export NDK to environment)
  
  
  
  if [[ "x$NDK_BASE" == "x" ]]; then
  
      NDK_BASE=/home/tama/Development/android-ndk-r9
  
      echo "No NDK_BASE set, using $NDK_BASE"
  
  fi
  
  
  
  NDK_PLATFORM_VERSION=8
  
  NDK_ABI=arm
  
  NDK_COMPILER_VERSION=4.6
  
  NDK_SYSROOT=$NDK_BASE/platforms/android-$NDK_PLATFORM_VERSION/arch-$NDK_ABI
  
  NDK_UNAME=`uname -s | tr '[A-Z]' '[a-z]'` # Convert Linux -> linux
  
  HOST=$NDK_ABI-linux-androideabi
  
  NDK_TOOLCHAIN_BASE=$NDK_BASE/toolchains/$HOST-$NDK_COMPILER_VERSION/prebuilt/$NDK_UNAME-x86_64
  
  CC="$NDK_TOOLCHAIN_BASE/bin/$HOST-gcc --sysroot=$NDK_SYSROOT"
  
  LD=$NDK_TOOLCHAIN_BASE/bin/$HOST-ld
  
  
  
  BUILD_PATH=build/ffmpeg
  
  
  
  ./configure \
  
  $DEBUG_FLAG \
  
  --arch=arm \
  
  --target-os=linux \
  
  --enable-runtime-cpudetect \
  
  --enable-pic \
  
  --disable-shared \
  
  --enable-static \
  
  --cross-prefix=$NDK_TOOLCHAIN_BASE/bin/$NDK_ABI-linux-androideabi- \
  
  --sysroot="$NDK_SYSROOT" \
  
  --extra-cflags="-march=armv6" \
  
  --extra-ldflags="" \
  
  --enable-ffmpeg \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-ffserver \
  
  --disable-network \

  The only thing i changed in this file is the NDK_BASE. I dont change any file after i cloned this project from git hub, so basically it should be working fine.

  Please help me, Thanks for your help :D

• avcodec : Fix fate-checkasm-hevc_pel failed on LA.

  18 avril, par Shiyou Yin

  avcodec : Fix fate-checkasm-hevc_pel failed on LA.
  Some loop counters were initialized incorrectly.
  
  This patch enhances the handling of loop iterations and residual parts.
  Reviewed-by : 陈昊 <chenhao@loongson.cn>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/loongarch/hevc_mc_bi_lsx.c
  • [DH] libavcodec/loongarch/hevc_mc_uni_lsx.c
  • [DH] libavcodec/loongarch/hevcdsp_init_loongarch.c
  • [DH] libavcodec/loongarch/hevcdsp_lsx.c
  • [DH] libavcodec/loongarch/hevcdsp_lsx.h