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  • Build FFMPEG with x264 for Android

    26 mai 2023, par Kage

    I am trying to build FFMPEG with libx264 for Android.

    I can successfully build and use FFMPEG for Android but I realized that I need the ability to encode, therefore I am trying to build FFMPEG with x264.

    I am using this tutorial to build FFmpeg for Android http://www.roman10.net/how-to-build-ffmpeg-for-android/

    When trying to build FFMPEG I get an error:

    "ERROR: libx264 not found"

    And in my log it says:

    "/usr/local/lib/libx264.a: could not read symbols: Archive has no index; run ranlib to add one..."

    I have the latest versions of both FFMPEG and x264. I understand that FFMPEG looks for the header and libraries in usr/lib and usr/include, so in order to make it find x264 I use the cflags and ldflags:

    • --extra-cflags = " -I/usr/local/include "
    • --extra-ldflags = " -L/usr/local/lib "

    I have tried building x264 with many different options that other people on the internet have said that i need. eg. --enable-shared, --enable-static, --disable-pthreads etc. Some forums say enable this, others say no disable that.

    Any help would be much appreciated, Thanks

    EDIT:

    If I build FFmpeg with the simplest commands to include libx264 then it works. ie.

    ./configure --enable-gpl --enable-libx264 --extra-cflags="-I/usr/local/include" --extra-ldflags="-L/usr/local/lib" --enable-static --enable-shared

    However I need it to work for Android. The script I am using is:

    NDK=~/Desktop/android-ndk-r7
PLATFORM=$NDK/platforms/android-8/arch-arm/
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86
function build_one
{
./configure --target-os=linux \
    --prefix=$PREFIX \
    --enable-cross-compile \
    --enable-shared \
    --enable-static \
    --extra-libs="-lgcc" \
    --arch=arm \
    --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
    --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
    --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
    --sysroot=$PLATFORM \
    --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS -I/usr/local/include" \
    --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L $PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog -L/usr/local/lib " \
    --enable-gpl \
    --enable-libx264 \
    --disable-everything \
    --enable-demuxer=mov \
    --enable-demuxer=h264 \
    --disable-ffplay \
    --enable-protocol=file \
    --enable-avformat \
    --enable-avcodec \
    --enable-decoder=rawvideo \
    --enable-decoder=mjpeg \
    --enable-decoder=h263 \
    --enable-decoder=mpeg4 \
    --enable-decoder=h264 \
    --enable-encoder=mjpeg \
    --enable-encoder=h263 \
    --enable-encoder=mpeg4 \
    --enable-encoder=h264 \
    --enable-parser=h264 \
    --disable-network \
    --enable-zlib \
    --disable-avfilter \
    --disable-avdevice \
    $ADDITIONAL_CONFIGURE_FLAG

make clean
make  -j4 install
$PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o
$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a
}

CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
PREFIX=./android/$CPU
ADDITIONAL_CONFIGURE_FLAG=
build_one

    I am guessing that some option in my configure command is conflicting with enabling libx264

    NOTE: If I remove --enable-libx264 then it works

  • Error encountered during encoding with 1 thread and decoding with multiple threads using FFmpeg in C

    17 mai 2023, par Rachel

    I'm currently working on a project where I'm using FFmpeg in C programming language for encoding and decoding video. I have configured the encoder to use 1 thread and the decoder to use multiple threads (specifically, 23 threads). However, when I run the code, I encounter the following error:

    avcodec_receive_frame failure - Resource temporarily unavailable

    Here are the relevant code snippets:

    Encoder:

    pt_handle->t_x264_param.i_threads = 1;

    pt_handle->pt_x264_encoder = x264_encoder_open(&pt_handle->t_x264_param);

    Decoder:

    pt_handle->pt_avcodec_ctx->thread_count = 23;

    i_retval = avcodec_open2(pt_handle->pt_avcodec_ctx, pt_h264_decoder, NULL);

    I'm unsure about the cause of this error and how to resolve it. Any insights or suggestions on how to address this issue would be greatly appreciated. Thank you!

  • Gstreamer convert and display video v4l2 - tee problems in rust

    27 mars 2023, par d3im

    I have USB grabber v4l2 source and I want to tee stream to autovideosink and x264enc to file (now as fake black hole)

    When I disable one or another branch it works but together Pipeline goes:

    Pipeline state changed from Null to Ready
Pipeline state changed from Ready to Paused

    and stays there never switches to Playing

    gst-launch-1.0 with similar functionality works well.

        gst::Element::link_many(&[&pw_video, &v_caps, &vid_queuey, &vid_tee]).unwrap();
    gst::Element::link_many(&[&vid_queue1, &autovideoconvert, &vid_queuex, &autovideosink]).unwrap();
    gst::Element::link_many(&[&vid_queue2, &autovideoconvert_x264, &vid_queue3, &x264, &vid_queue4, &fake]).unwrap();

    let tee_display_pad = vid_tee.request_pad_simple("src_10").unwrap();
    let vid_queue1_pad = vid_queue1.static_pad("sink").unwrap();

    tee_display_pad.link(&vid_queue1_pad).unwrap();

    let tee_convert_pad = vid_tee.request_pad_simple("src_20").unwrap();
    let vid_queue2_pad = vid_queue2.static_pad("sink").unwrap();

    tee_convert_pad.link(&vid_queue2_pad).unwrap();

    How can I use tee in rust properly to have playable pipeline with two branches?

    Update: I read some posts about increasing queue size, so I tried for this and then all queues:

        let vid_queue1 = gst::ElementFactory::make("queue")
        .name("queue1")
        .property("max-size-buffers", 5000 as u32)
        .property("max-size-bytes", 1048576000 as u32)
        .property("max-size-time", 60000000000 as u64)
        .build()
        .expect("queue1");

    but it didn't help so I tried set zero latency:

        let x264 = gst::ElementFactory::make("x264enc")
        .name("x264")
        .property_from_str("speed-preset", "ultrafast")
        .property_from_str("pass", "qual")
        .property_from_str("tune", "zerolatency")
        .property("quantizer", 0 as u32)
        .property("threads", 8 as u32)
        .build()
        .expect("!x264");

    and it works now. But comparable gst-launch-1.0 settings didn't had such option - only queues sizes increased.

    Is there any other option than setting zerolatency?

  • How to fix the "No working C compiler found." problem for compiling x264 in Linux ?

    27 février 2023, par gc xu

    Firstly I have read all other solutions related to this problem, including adding path and reinstall yasm, nasm, gcc... I git clone the source code from https://code.videolan.org/videolan/x264.git. Then, I run command ./configure, it shows

    ./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
No working C compiler found.

    I check the file "config.log". It shows:

    checking for -Werror=unknown-warning-option... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=unknown-warning-option   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=unknown-attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=unknown-attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=ignored-attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=ignored-attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
x264 configure script
Command line options: "--enable-shared" "--enable-static"

checking whether gcc works... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c -m64  -Wall -I. -I$(SRCPATH)     -m64  -lm -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
DIED: No working C compiler found.

    Plus I wonder is there something to do with nasm? Becasuse I install nasm with some C grammer problems:

    ./config/config.h:659:16: error: duplicate ‘unsigned’
  659 | #define size_t unsigned int
      |                ^~~~~~~~
./config/config.h:659:25: error: two or more data types in declaration specifiers
  659 | #define size_t unsigned int
      |                         ^~~
In file included from /usr/include/string.h:633,
                 from ./include/compiler.h:89,
                 from asm/nasm.c:38:
./include/compiler.h:241:7: error: expected identifier or ‘(’ before ‘__extension__’
  241 | char *strsep(char **, const char *);
      |       ^~~~~~
./include/compiler.h:241:7: error: expected identifier or ‘(’ before ‘)’ token
  241 | char *strsep(char **, const char *);
      |       ^~~~~~
make[1]: *** [asm/nasm.o] Error 1
make[1]: Leaving directory `/mnt/nfs0/gengcheng/ffmpeg-5.0.2/nasm-2.15.05'
make: *** [all] Error 2

    I have read all other solutions related to this problem, including adding path and reinstall yasm, nasm, gcc... I want to install x264 to configure it in ffmpeg. Thanks for all your answers!

  • How to use x264 encoder in Ant Media Server v2.5

    26 février 2023, par faraway

    Ant Media Server starts to use OpenH264 as a software encoder in v2.5 but I need to use x264. How can I use x264 in Ant Media Server v2.5?

    https://github.com/ant-media/Ant-Media-Server/releases/tag/ams-v2.5.0 https://antmedia.io

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