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  • Building ffmpeg for Android with clang

    30 juillet 2019, par Guerlando OCs

    I’m trying to build ffmpeg for Android using Clang and Android NDK 20 in Ubuntu 18.04.

    I’m trying :

    ./configure
    
--prefix=android/
    
--disable-asm
    
--enable-cross-compile
    
--disable-static
    
--disable-programs
    
--disable-doc
    
--enable-shared
    
--enable-protocol=file
    
--enable-pic
    
--enable-small
    
--disable-pthreads
    
--ar=/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ar
    
--strip=/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-strip
    
--ld=/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ld
    
--cc=/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/bin/clang
    
--cxx=/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++
    
--as=/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/bin/clang
    
--target-os=android
    
--extra-cflags=-target aarch64-none-linux-android
    
-mfpu=neon
    
-mfloat-abi=soft
    
-I/home/sources/android-ndk-r20/sysroot/usr/include/aarch64-linux-android
    
-O3
    
-fPIC
    
--extra-ldflags=-L/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/lib/gcc/aarch64-linux-android/4.9.x
    
-L/platforms/android-/arch-arm64/usr/lib
    
--sysroot=/home/sources/android-ndk-r20/sysroot

    But I’m getting some compile errors like this :

    /home/sources/android-ndk-r20/sysroot/usr/include/stdlib.h:61:7: error: expected identifier or '('
    
char* getenv(const char* __name);
    
      ^
    
./config.h:17:19: note: expanded from macro 'getenv'
    
#define getenv(x) NULL
    
                  ^
    
/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/8.0.7/include/stddef.h:105:18: note: expanded from macro 'NULL'
    
#  define NULL ((void*)0)
    
                 ^
    
In file included from libavdevice/alldevices.c:23:
    
In file included from ./libavformat/internal.h:27:
    
In file included from ./libavformat/avformat.h:319:
    
In file included from ./libavcodec/avcodec.h:31:
    
In file included from ./libavutil/samplefmt.h:24:
    
In file included from ./libavutil/avutil.h:296:
    
In file included from ./libavutil/common.h:39:
    
/home/sources/android-ndk-r20/sysroot/usr/include/stdlib.h:61:7: error: expected ')'
    
./config.h:17:19: note: expanded from macro 'getenv'
    
#define getenv(x) NULL
    
                  ^
    
/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/8.0.7/include/stddef.h:105:18: note: expanded from macro 'NULL'
    
#  define NULL ((void*)0)
    
                 ^
    
/home/sources/android-ndk-r20/sysroot/usr/include/stdlib.h:61:7: note: to match this '('
    
./config.h:17:19: note: expanded from macro 'getenv'
    
#define getenv(x) NULL
    
                  ^
    
/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/8.0.7/include/stddef.h:105:17: note: expanded from macro 'NULL'
    
#  define NULL ((void*)0)
    
                ^
    
In file included from libavdevice/alldevices.c:23:
    
In file included from ./libavformat/internal.h:27:
    
In file included from ./libavformat/avformat.h:319:
    
In file included from ./libavcodec/avcodec.h:31:
    
In file included from ./libavutil/samplefmt.h:24:
    
In file included from ./libavutil/avutil.h:296:
    
In file included from ./libavutil/common.h:39:
    
/home/sources/android-ndk-r20/sysroot/usr/include/stdlib.h:61:7: error: expected ')'
    
char* getenv(const char* __name);
    
      ^
    
./config.h:17:19: note: expanded from macro 'getenv'
    
#define getenv(x) NULL
    
                  ^
    
/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/8.0.7/include/stddef.h:105:24: note: expanded from macro 'NULL'
    
#  define NULL ((void*)0)
    
                       ^
    
/home/sources/android-ndk-r20/sysroot/usr/include/stdlib.h:61:7: note: to match this '('
    
./config.h:17:19: note: expanded from macro 'getenv'
    
#define getenv(x) NULL
    
                  ^
    
/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/8.0.7/include/stddef.h:105:16: note: expanded from macro 'NULL'
    
#  define NULL ((void*)0)
    
               ^
    
In file included from libavdevice/fbdev_dec.c:37:
    
In file included from ./libavutil/internal.h:42:
    
In file included from ./libavutil/timer.h:41:
    
/home/sources/android-ndk-r20/sysroot/usr/include/stdlib.h:61:7: error: expected identifier or '('
    
char* getenv(const char* __name);
    
      ^
    
./config.h:17:19: note: expanded from macro 'getenv'
    
#define getenv(x) NULL
    
                  ^
    
/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/8.0.7/include/stddef.h:105:18: note: expanded from macro 'NULL'
    
#  define NULL ((void*)0)
    
                 ^
    
In file included from libavdevice/fbdev_dec.c:37:
    
In file included from ./libavutil/internal.h:42:
    
In file included from ./libavutil/timer.h:41:
    
/home/sources/android-ndk-r20/sysroot/usr/include/stdlib.h:61:7: error: expected ')'
    
./config.h:17:19: note: expanded from macro 'getenv'
    
#define getenv(x) NULL
    
                  ^
    
/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/8.0.7/include/stddef.h:105:18: note: expanded from macro 'NULL'
    
#  define NULL ((void*)0)
    
                 ^
    
/home/sources/android-ndk-r20/sysroot/usr/include/stdlib.h:61:7: note: to match this '('
    
./config.h:17:19: note: expanded from macro 'getenv'
    
#define getenv(x) NULL

    I also tried, from here :

    ./configure
    
--prefix=/home/deps/build/ffmpeg/arm64
    
--cross-prefix=/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/aarch64-linux-android-
    
--sysroot=/home/sources/android-ndk-r20/sysroot
    
--disable-static
    
--disable-doc
    
--disable-ffmpeg
    
--disable-ffplay
    
--disable-ffprobe
    
--disable-symver
    
--enable-shared
    
--enable-protocol=concat
    
--enable-protocol=file
    
--enable-muxer=mp4
    
--enable-demuxer=mpegts
    
--target-os=android
    
--enable-decoder=h264
    
--enable-cross-compile
    
--arch=aarch64
    
--toolchain=clang-usan
    
--extra-cflags=-fPIE
    
-fPIC
    
-ffast-math
    
-funroll-loops
    
-mfloat-abi=softfp
    
-mfpu=vfpv3-d16
    
--extra-ldflags=-pie
    
--ar=/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ar
    
--strip=/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-strip
    
--ld=/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ld
    
--cc=/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/bin/clang
    
--cxx=/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++
    
--as=/home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/bin/clang

    But I get this error :

    /home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/bin/clang is unable to create an executable file.
    
C compiler test failed.

    In the log file I get :

    /home/sources/android-ndk-r20/toolchains/llvm/prebuilt/linux-x86_64/bin/clang --sysroot=/home/sources/android-ndk-r20/sysroot -fsanitize=undefined -fPIE -fPIC -ffast-math -funroll-loops -mfloat-abi=softfp -mfpu=vfpv3-d16 -c -o /tmp/ffconf.knsd57OI/test.o /tmp/ffconf.knsd57OI/test.c
    
clang: warning: argument unused during compilation: '-mfloat-abi=softfp' [-Wunused-command-line-argument]
    
clang: warning: argument unused during compilation: '-mfpu=vfpv3-d16' [-Wunused-command-line-argument]
    
/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ld -pie -fsanitize=undefined --sysroot=/home/sources/android-ndk-r20/sysroot -o /tmp/ffconf.knsd57OI/test /tmp/ffconf.knsd57OI/test.o
    
/home/sources/android-ndk-r20/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ld: -f may not be used without -shared
    
C compiler test failed.

    It looks like, by the line -fsanitize=undefined that an undefined is being passed, I don’t know why.

    Anyone knows what’s happening or an alternative way to build ?

  • Exec () Creating two different process for FFMPEG

    23 mai 2018, par Bruno Andrade

    I run this command in exec () and it creates two FFMPEG processes one at the same time as the other but with different PID. Is this behavior normal ? When I run the code directly in the shell this does not happen.

    $ffmpeg = "/home/user/bin/ffmpeg -hide_banner -loglevel verbose -n -i https://sitelink/list.m3u8 -map 0:4 -map 0:5 -acodec copy -bsf:a aac_adtstoasc -vcodec copy video.mp4 1> log.txt  2>&1";
    

    
    exec($ffmpeg, $output, $var);

    Example of the two processes created

    user+ 24414 24413  0 13:42 pts/2    00:00:00 sh -c /home/user/bin/ffmpeg -hide_banner -loglevel verbose -n -i https://sitelink/list.m3u8 -map 0:4 -map 0:5 -acodec copy -bsf:a aac_adtstoasc -vcodec copy video.mp4 1> log.txt  2>&1
    
user+ 24415 24414  1 13:42 pts/2    00:00:00 /home/user/bin/ffmpeg -hide_banner -loglevel verbose -n -i https://sitelink/list.m3u8 -map 0:4 -map 0:5 -acodec copy -bsf:a aac_adtstoasc -vcodec copy video.mp4

  • FFMPEG with php video compressing size [on hold]

    21 octobre 2019, par matrix4583

    I am trying to reduce the size of my video files with ffmpeg using php. However the code I use from the documentation is not working and little explanation on how to reduce the size. Here is the code I use.I tried to declare the video with $video = ’video.mp4’ ;, but still no result.

                            $video = 'video.mp4';
    
                        $ffmpeg = \FFMpeg\FFMpeg::create([
    
                        'ffmpeg.binaries'  => '/home//ffmpeg/ffmpeg',
    
                        'ffprobe.binaries' => '/home//ffmpeg/ffprobe' 
    
                    ]);
    

    

    

    
                        $format = new FFMpeg\Format\Video\X264();
    
                        $format->on('progress', function ($video, $format, $percentage) 
    
                        {
    
                            echo "$percentage % transcoded";
    
                        });
    

    
                        $format
    
                            ->setKiloBitrate(1000)
    
                            ->setAudioChannels(2)
    
                            ->setAudioKiloBitrate(256);
    

    
                        $video->save($format, 'video.mp4');  
    

    
OUTPUT: Undefined variable: video

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