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• ffmpeg configure always returns "not found" when using sysroot and cross-prefix options - how to use them correctly ?

  5 août 2014, par user2212461

  I try to build ffmpeg with a cross-compiler. When setting the configure flags I am getting the following errors :

  WARNING: Compiler does not indicate floating-point ABI, guessing soft.
  
  build_it.sh: 29: build_it.sh: --sysroot=/home/android/android-ndk-r9/platforms/
  
      android-9/arch-arm/: not found
  
  build_it.sh: 32: build_it.sh.sh: --cross-prefix=/home/android/android-ndk-r9/
  
      toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86/bin/arm-linux-and
  
      roideabi-: not found

  The error message "not found" sounds like the paths dont exist but they are all correct and existing. How can I resolve this error ?

  build_it.sh :

  NDK=/home/android/android-ndk-r9
  
  SYSROOT=$NDK/platforms/android-9/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86
  
  CPU=arm
  
  PREFIX=test
  
  ADDI_CFLAGS="-marm"
  
  platform="android-9"
  
  
  
  ./configure \
  
      --disable-asm \
  
      --enable-shared \
  
      --target-os=linux \
  
      --arch=arm \
  
      --enable-cross-compile \
  
      --disable-static \
  
      --sysroot=$SYSROOT \
  
      --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
      --extra-ldflags="$ADDI_LDFLAGS"
  
      --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
      --prefix=$PREFIX \
  
  
  
  ##configure fails here
  
  ...

• (Cross-platform) FFMPEG based GUI direct stream copy linear video editor [on hold]

  14 octobre 2014, par Fluorescent Hallucinogen

  FFMPEG official site has list of FFMPEG based projects (https://trac.ffmpeg.org/wiki/Projects).

  I use VirtualDub for linear video montage using direct stream copy mode (without recompression). It is GNU GPL licensed, but is designed only for Microsoft Windows and operates only AVI files.

  FFMPEG is excellent cross-platform utility that supports many formats (codecs and containers). It can be used for split and merge video files (not only AVI) using direct stream copy mode, but FFMPEG is console UI application.

  Is there GUI video editor (based on FFMPEG) (cross-platform or maybe only for Linux or maybe only for Windows) that can split and merge video files (not only AVI) using direct stream copy mode and have preview window ?

  Now I use video player, watch the input video file, remember the time for split video to fragments and write console line script for merge these fragments. All work is OK, but it is very inconvenient.

  At the worst, are there players or editors that can generate project file (that contains time markers for split and merge) that can be used with FFMPEG ?

• Dash JS Player Cross Browser Compatibility

  21 mai 2015, par JJ The Second

  I am conducting a research for my company streaming service. I found dash.js for adaptive streaming which is a perfect solution along with ffMpeg for transcoding.

  So how this solution works is to create bunch of files served in .mpd format. Now the questions I have :

  1. Do you think this a early stage and I should wait before start using DASH.JS ? Do you think there is a better solution for safe and fast streaming ?

  2. Player options : So far the only player I found was this http://dashif.org/reference/players/javascript/1.0.0/

     I have no idea how compatible it is with browsers and what limits I’ll be facing if I chose it. Is there any other solid solution for this ?

  3. Do you guys think I’m going wrong direction for this ?

  4. What are my server requirements to run these technologies ? I have a 500MBs, 64GB Ram, 24 Core, 2TB beast, does this do the job ?