Building

[bkatgithub]

Hi Madhavan,

I tried specifying vcodec libx264 and it caused a crash. I realized that I might have to
do a custom build with this codec. I am trying to do that using the instructions
in your blog (https://medium.com/madhavanmalolan/ffmpeg-for-android-b307f2613c82).
I am getting an error (shown below) when I do the ndk-build.

Before I start debugging it, I wanted clarification on something in the build instructions.
In the section titled "Compiling source" you say "Copy the following files from
/path/to/ffmpeg to the jni/ directory". Where should the "jni" directory be created?
I tried creating it in the android project directory at the same level as the 'app' directory (based
on what you say further down in the instructions to cd /path/to/app/jni).
I also tried placing it in the app/src/main directory.

I am using ffmpeg 2.8.13 and android-ndk-r12b

Thanks for putting this out for everybody!

Did I miss something that is causing this error?

Bcs-MacBook-Pro:jni bc$ /Users/bc/projects/android/android-ndk-r12b/ndk-build Android NDK: WARNING: Ignoring unknown import directory: /Users/bc/tmp/android/MediaCodecTest/app/src/main/jni Android NDK: /Users/bc/tmp/android/MediaCodecTest/app/src/jni/Android.mk: Cannot find module with tag '../../../../../../../projects/android/ffmpeg-2.8.13/android/arm' in import path Android NDK: Are you sure your NDK_MODULE_PATH variable is properly defined ? Android NDK: The following directories were searched: Android NDK: /Users/bc/tmp/android/MediaCodecTest/app/src/jni/Android.mk:14: *** Android NDK: Aborting. . Stop.

[madhavanmalolan]

The JNI folder should be inside app/src/main

[bkatgithub]

Thanks Madhavan for the clarification. It helped me get past the error I was seeing.

However, I am seeing this error now. I googled it and found a mention about specifying abiFilters (https://stackoverflow.com/questions/37508876/android-ndk-ffmpeg-unknown-mnemonic-error). But doing this did not help with the error. Do you happen to know what the problem here is?

Thanks.

Bcs-MacBook-Pro:jni bc$ /Users/bc/projects/android/android-ndk-r12b/ndk-build [arm64-v8a] Compile : ffmpeg <= ffmpeg_controller.c [arm64-v8a] Compile : ffmpeg <= ffmpeg.c /var/folders/lw/psryh7r92d9djvtltkfrjgz80000gn/T//cc5pthx0.s: Assembler messages: /var/folders/lw/psryh7r92d9djvtltkfrjgz80000gn/T//cc5pthx0.s:8554: Error: unknown mnemonic itt' -- itt gt' /var/folders/lw/psryh7r92d9djvtltkfrjgz80000gn/T//cc5pthx0.s:8555: Error: unknown mnemonic movgt' -- movgt x25,x0' /var/folders/lw/psryh7r92d9djvtltkfrjgz80000gn/T//cc5pthx0.s:8556: Error: unknown mnemonic movgt' -- movgt x0,x1' /var/folders/lw/psryh7r92d9djvtltkfrjgz80000gn/T//cc5pthx0.s:8558: Error: unknown mnemonic it' -- it le' /var/folders/lw/psryh7r92d9djvtltkfrjgz80000gn/T//cc5pthx0.s:8559: Error: unknown mnemonic movle' -- movle x0,x2' /var/folders/lw/psryh7r92d9djvtltkfrjgz80000gn/T//cc5pthx0.s:8561: Error: unknown mnemonic it' -- it gt' /var/folders/lw/psryh7r92d9djvtltkfrjgz80000gn/T//cc5pthx0.s:8562: Error: unknown mnemonic movgt' -- movgt x25,x0' make: *** [/Users/bc/tmp/android/MediaCodecTest/app/src/main/obj/local/arm64-v8a/objs/ffmpeg/ffmpeg.o] Error 1

[madhavanmalolan]

Can you give me the following information :

1. What is the FFMPEG version you are trying to build?
2. Can you show me your build.sh?

[bkatgithub]

I am working with ffmpeg v 2.8.13 and ndk r12b.

The build file

`
#!/bin/bash
NDK=/Users/bc/projects/android/android-ndk-r12b
SYSROOT=$NDK/platforms/android-14/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64

function build_one
{
./configure
--prefix=$PREFIX
--enable-shared
--disable-static
--disable-doc
--disable-ffmpeg
--disable-ffplay
--disable-ffprobe
--disable-ffserver
--disable-doc
--disable-symver
--enable-protocol=concat
--enable-protocol=file
--enable-muxer=mp4
--enable-demuxer=mpegts
--enable-memalign-hack
--cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi-
--target-os=linux
--arch=arm
--enable-cross-compile
--sysroot=$SYSROOT
--extra-cflags="-Os -fpic $ADDI_CFLAGS"
--extra-ldflags="$ADDI_LDFLAGS"
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j3
make install
}

CPU=arm
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm"
build_one
`