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Sur d’autres sites (6859)

  • Using and building FFMPEG library in Android Studio(Cmake)

    8 septembre 2017, par y3k00000

    As title, I’m trying to use the ffmpeg source code as library in Android Studio on Ubuntu Linux, but meeting some trouble in compilation stage. I think I must be missing some compile option but having no idea what I miss, can somebody lend a hand ?

    My codes & settings are below :

    A simple auto-generated .cpp

    #include 
    
#include <string>
    
#include "libavcodec/aacenc.h"
    

    
extern "C"
    
JNIEXPORT jstring JNICALL
    
Java_y3k_testffmpegnative_MainActivity_stringFromJNI(
    
        JNIEnv *env,
    
        jobject /* this */) {
    
    std::string hello = "Hello from C++";
    
    return env->NewStringUTF(hello.c_str());
    
}
    

    
AACEncContext * aacEncContext; // Just trying by adding this.
    
</string>

    I’ve tried these Gradle setting and it didn’t help :

    android {
    
    ....
    
    externalNativeBuild {
    
        cmake {
    
            arguments "-DANDROID_TOOLCHAIN=clang"
    
            cFlags "-std=c99"
    
            cppFlags "-frtti","-fexceptions"
    
        }
    
    }
    
}
    
....

    CMakeLists.txt

    (Android Studio generated)
    
....
    
include_directories( /home/y3k/ffmpeg )

    Error message while compiling :

    /home/y3k/ffmpeg/libavutil/float_dsp.h
    
Error:(164, 50) error: expected ')'
    
Information:(164, 30) to match this '('
    
Error:(164, 50) error: expected ')'
    
Information:(164, 30) note: to match this '('
    
/home/y3k/ffmpeg/libavutil/fixed_dsp.h
    
Error:(153, 44) error: expected ')'
    
Information:(153, 30) to match this '('
    
Error:(153, 44) error: expected ')'
    
Information:(153, 30) note: to match this '('
    
/home/y3k/ffmpeg/libavcodec/mpeg4audio.h
    
Error:(44, 8) error: unknown type name 'av_export'
    
Error:(44, 18) error: expected unqualified-id
    
Error:(44, 8) error: unknown type name 'av_export'
    
Error:(44, 18) error: expected unqualified-id
    
/home/y3k/ffmpeg/libavcodec/aac.h
    
Error:(294, 21) error: expected member name or ';' after declaration specifiers
    
Error:(294, 21) error: expected member name or ';' after declaration specifiers

    FFMpeg config.h generated by this script :

    NDK=/home/y3k/Android/Sdk/ndk-bundle
    
SYSROOT=$NDK/platforms/android-23/arch-arm/
    
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
    
function build_one
    
{
    
./configure \
    
 --prefix=$PREFIX \
    
 --disable-shared \
    
 --enable-static \
    
 --disable-doc \
    
 --disable-ffmpeg \
    
 --disable-ffplay \
    
 --disable-ffprobe \
    
 --disable-ffserver \
    
 --disable-avdevice \
    
 --disable-doc \
    
 --disable-symver \
    
 --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
    
make install
    
}
    
CPU=arm
    
PREFIX=$(pwd)/android/$CPU
    
ADDI_CFLAGS="-marm"
    
build_one

    By tracing the errors I found these lines :

    in float_dsp.h, fixed_dsp.h :

    void (*butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len);

    av_restrict defined in config.h

    #define av_restrict restrict

    in aac.h :

    ....
    
struct AACContext {
    
    AVClass        *class;
    
....

    in mpeg4audio.h :

    extern av_export const int avpriv_mpeg4audio_sample_rates[16];

    So I’m guessing it’s because the compiler misrecognized the C code as C++, I tried adding these :

    arguments "-DANDROID_TOOLCHAIN=clang"
    
cFlags "-std=c99"

    to my build.gradle but didn’t help. Having no idea where to move on. :(

    I’m using the latest stable version of Android Studio on Ubuntu desktop. Please don’t be hesitate to ask if any extra information is required.

    Also I’ve been tried edit my native-lib.cpp into .c (Surely with the code contents changed), but wasn’t working either.

    Appreciate for any help.

  • Error merging two mp4 files using filter_complex [duplicate]

    3 août 2019, par Sumit Kumar

    This question already has an answer here :

    I am trying to merge/join 2 mp4 files using ffmpeg -filter_complex

    This is my command

    ffmpeg.exe -i a.mp4 -i b.mp4 -filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0]concat=n=2:v=1:a=1[v][a]" -map "[v]" -map "[a]" output_video.mp4

    ffmpeg error :

    [Parsed_concat_0 @ 03312240] Input link in1:v0 parameters (size 1280x720, SAR 3:4) do not match the corresponding output link in0:v0 parameters (1280x720, SAR 1:1)
    
[Parsed_concat_0 @ 03312240] Failed to configure output pad on Parsed_concat_0
    
Error configuring complex filters.
    
Invalid argument

    Detailed error :

    ffmpeg version N-83280-gcba4f0e Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
    
  libavutil      55. 45.100 / 55. 45.100
    
  libavcodec     57. 75.100 / 57. 75.100
    
  libavformat    57. 65.100 / 57. 65.100
    
  libavdevice    57.  2.100 / 57.  2.100
    
  libavfilter     6. 71.100 /  6. 71.100
    
  libswscale      4.  3.101 /  4.  3.101
    
  libswresample   2.  4.100 /  2.  4.100
    
  libpostproc    54.  2.100 / 54.  2.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.65.100
    
  Duration: 00:00:50.46, start: 0.000000, bitrate: 163 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 168 kb/s, 5 fps, 5 tbr, 10240 tbn, 10 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, mono, fltp, 35 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'b.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.65.100
    
  Duration: 00:00:25.00, start: 0.000000, bitrate: 241 kb/s
    
    Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 3:4 DAR 4:3], 132 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
[Parsed_concat_0 @ 03312240] Input link in1:v0 parameters (size 1280x720, SAR 3:4) do not match the corresponding output link in0:v0 parameters (1280x720, SAR 1:1)
    
[Parsed_concat_0 @ 03312240] Failed to configure output pad on Parsed_concat_0
    
Error configuring complex filters.
    
Invalid argument

  • Revision a242def2aa : Adding sad function generation macros Tidying up the high bitdepth SAD implemen

    1er mai 2014, par Peter de Rivaz

    Changed Paths :
     Modify /vp9/encoder/vp9_sad.c



    Adding sad function generation macros

    Tidying up the high bitdepth SAD implementation to match
    the corresponding change 69783 on master.

    Change-Id : I9c415a996a3ff237b2d25c57ad874284a45793fc

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