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• Android NDK Build FFMPEG in 2021

  19 janvier 2023, par Kyros

  I'm working on an android app, and I have to convert webm files to mp3.
I really want to make a custom ffmpeg build, because it reduces the ffmpeg executable size to only 2MB.

  


  My library works absolutely fine when running on my PC, but i'm struggling to build it for android... It seems like NDK architecture has changed and tutorials are outdated, and I can't find a proper and recent guide for android compiling...

  


  I also would like to target all architectures (aarch64, armv7, i686, and x86_64)...

  


  I've been on this for hours, fixed many errors, but still nothing has worked ><.&#xA;Please help me ! :

  &#xA;

  PS. I'm compiling on Linux, here is my configuration script :

  &#xA;

  #!/bin/bash

API=31 # target android api

OUTPUT=/home/romain/dev/android/ffmpeg_build

NDK=/home/romain/android-sdk/ndk/23.0.7599858
TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/linux-x86_64
SYSROOT=$TOOLCHAIN/sysroot

TOOL_PREFIX="$TOOLCHAIN/bin/aarch64-linux-android"

CC="$TOOL_PREFIX$API-clang"
CXX="$TOOL_PREFIX$API-clang++"

./configure \
    --prefix=$OUTPUT \
    --target-os=android \
    --arch=$ARCH \
    --cpu=$CPU \
    --disable-everything \
    --disable-everything \
    --disable-network \
    --disable-autodetect \
    --enable-small \
    --enable-decoder=opus,vorbis \
    --enable-demuxer=matroska \
    --enable-muxer=mp3 \
    --enable-protocol=file \
    --enable-filter=aresample \
    --enable-libshine \
    --enable-encoder=libshine \
    --cc=$CC \
    --cxx=$CXX \
    --sysroot=$SYSROOT \
    --extra-cflags="-0s -fpic"

make
make install


  &#xA;

• Encode RGB565 raw data using ffmpeg libx264 for android

  23 janvier 2014, par nmxprime

  i have below questions regarding android implementation

  1. How various video codecs differ especially `which are stream based and which are frame based'

  2. Over many forums and questions everyone is talking SPS,PPS,etc., so where i can find enough details about codec(Please mention something other than RFC documents !!) to understand it and use ffmpeg relevantly ?

  3. From this Is it possible to use in-built HW Decoders od android devices ? If so, How ? Do i need to use OpenMax-IL (or AL or DL , i mean which is for what ?)

  4. Does ffmpeg supports H264 encoding of RGB (or RGBA) or RGB565(or RGB555) input data through libx264 ?

  5. If my requirement is only h264 encode & decode, can i use libx264 without ffmpeg ?If so any sample/guide ?

• Hardware accelerated FFmpeg on android ?

  3 juillet 2012, par U Avalos

  I compiled an older version of FFmpeg for Android (if I recall correctly it was 0.6.X). FFmpeg decodes a video frame, scales it, then I'm using OpenGL to draw it on the screen. As far as I can tell, the problem is the decoding and scaling---they're not hardware accelerated.

  My question is :

  1. Is the latest version of FFmpeg hardware accelerated for ARM (Android) processors ?
  2. Am I going about this the wrong way ? i.e., is there a better way of doing this ? Where "this" is playing a h264 HD video as a video live wallpaper---the framerate needs to be high, so hardware acceleration is desirable whenever available.