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  • Compiling x264 for iOS 7

    25 janvier 2016, par user500

    I'm getting error on compiling x264 for iOS.

    I have Xcode Version 5.0 (5A1413) with Apple LLVM version 5.0 (clang-500.2.75) (based on LLVM 3.3svn). I'm compiling x264-snapshot-20130925-2245.

    Config:

    CC=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang ./configure \
--host=arm-apple-darwin \
--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk \
--prefix=armv7 \
--extra-cflags='-arch armv7' \
--extra-ldflags="-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/lib/system -arch armv7" \
--enable-pic \
--enable-static

    Getting error:

    common/arm/cpu-a.S:29:7: error: unknown token in expression
.align
      ^
common/arm/cpu-a.S:139:5: error: instruction 'suble' can not set flags, but 's' suffix specified
    subles ip, ip, #1
    ^

  • How to get h264 video info ?

    3 janvier 2016, par Zelenov

    How can I get specific h264 video information from video file? I need to know profile (Baseline/Main/High) and is there B-Frames in movie?

  • How to enable X264 with thread for Android on Mac OS X ?

    3 janvier 2016, par Jerikc XIONG

    I use the following script to compile x264:

    #!/bin/bash
# Based on https://github.com/yixia/x264/blob/master/build_android.sh

if [ -z "$ANDROID_NDK" ]; then
    echo "You must define ANDROID_NDK before starting."
    echo "They must point to your NDK directories.\n"
    exit 1
fi

# Detect OS
OS=`uname`
HOST_ARCH=`uname -m`
export CCACHE=; type ccache >/dev/null 2>&1 && export CCACHE=ccache
if [ $OS == 'Linux' ]; then
    export HOST_SYSTEM=linux-$HOST_ARCH
elif [ $OS == 'Darwin' ]; then
    export HOST_SYSTEM=darwin-$HOST_ARCH
fi


SOURCE=`pwd`
PREFIX=$SOURCE/build/android

SYSROOT=$ANDROID_NDK/platforms/android-12/arch-arm
CROSS_PREFIX=$ANDROID_NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/$HOST_SYSTEM/bin/arm-linux-androideabi-
EXTRA_CFLAGS="-march=armv7-a -mfloat-abi=softfp -mfpu=neon -D__ARM_ARCH_7__ -D__ARM_ARCH_7A__"
EXTRA_LDFLAGS="-nostdlib"

./configure  --prefix=$PREFIX \
    --cross-prefix=$CROSS_PREFIX \
    --extra-cflags="$EXTRA_CFLAGS" \
    --extra-ldflags="$EXTRA_LDFLAGS" \
    --enable-pic \
    --enable-static \
    --enable-strip \
    --disable-cli \
    --host=arm-linux \
    --sysroot=$SYSROOT

make clean
make STRIP= -j4 install || exit 1

    After i add '-lpthread' , i got the following compile error:

    $ sh build_android.sh 
No working C compiler found.
Makefile:3: config.mak: No such file or directory
./configure
platform:      X86_64
byte order:    little-endian
system:        MACOSX
cli:           yes
libx264:       internal
shared:        no
static:        no
asm:           yes
interlaced:    yes
avs:           avxsynth
lavf:          no
ffms:          no
mp4:           no
gpl:           yes
thread:        posix
opencl:        yes
filters:       crop select_every 
debug:         no
gprof:         no
strip:         no
PIC:           no
bit depth:     8
chroma format: all

You can run 'make' or 'make fprofiled' now.
dependency file generation...
clang: error: no such file or directory: '/common/mc.c'
clang: error: no such file or directory: '/common/predict.c'
clang: error: no such file or directory: '/common/pixel.c'
clang: error: no such file or directory: '/common/macroblock.c'
clang: error: no such file or directory: '/common/frame.c'
clang: error: no such file or directory: '/common/dct.c'
clang: error: no such file or directory: '/common/cpu.c'
clang: error: no such file or directory: '/common/cabac.c'
clang: error: no such file or directory: '/common/common.c'
clang: error: no such file or directory: '/common/osdep.c'
clang: error: no such file or directory: '/common/rectangle.c'
clang: error: no such file or directory: '/common/set.c'
clang: error: no such file or directory: '/common/quant.c'
clang: error: no such file or directory: '/common/deblock.c'
clang: error: no such file or directory: '/common/vlc.c'
clang: error: no such file or directory: '/common/mvpred.c'
clang: error: no such file or directory: '/common/bitstream.c'
clang: error: no such file or directory: '/encoder/analyse.c'
clang: error: no such file or directory: '/encoder/me.c'
clang: error: no such file or directory: '/encoder/ratecontrol.c'
clang: error: no such file or directory: '/encoder/set.c'
clang: error: no such file or directory: '/encoder/macroblock.c'
clang: error: no such file or directory: '/encoder/cabac.c'
clang: error: no such file or directory: '/encoder/cavlc.c'
clang: error: no such file or directory: '/encoder/encoder.c'
clang: error: no such file or directory: '/encoder/lookahead.c'
clang: error: no such file or directory: '/x264.c'
clang: error: no such file or directory: 'x264.o'
clang: error: no input files
clang: error: no such file or directory: '/input/input.c'
clang: error: no such file or directory: 'input/input.o'
clang: error: no input files
clang: error: no such file or directory: '/input/timecode.c'
clang: error: no such file or directory: 'input/timecode.o'
clang: error: no input files
clang: error: no such file or directory: '/input/raw.c'
clang: error: no such file or directory: 'input/raw.o'
clang: error: no input files
clang: error: no such file or directory: '/input/y4m.c'
clang: error: no such file or directory: 'input/y4m.o'
clang: error: no input files
clang: error: no such file or directory: '/output/raw.c'
clang: error: no such file or directory: 'output/raw.o'
clang: error: no input files
clang: error: no such file or directory: '/output/matroska.c'
clang: error: no such file or directory: 'output/matroska.o'
clang: error: no input files
clang: error: no such file or directory: '/output/matroska_ebml.c'
clang: error: no such file or directory: 'output/matroska_ebml.o'
clang: error: no input files
clang: error: no such file or directory: '/output/flv.c'
clang: error: no such file or directory: 'output/flv.o'
clang: error: no input files
clang: error: no such file or directory: '/output/flv_bytestream.c'
clang: error: no such file or directory: 'output/flv_bytestream.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/filters.c'
clang: error: no such file or directory: 'filters/filters.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/video.c'
clang: error: no such file or directory: 'filters/video/video.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/source.c'
clang: error: no such file or directory: 'filters/video/source.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/internal.c'
clang: error: no such file or directory: 'filters/video/internal.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/resize.c'
clang: error: no such file or directory: 'filters/video/resize.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/cache.c'
clang: error: no such file or directory: 'filters/video/cache.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/fix_vfr_pts.c'
clang: error: no such file or directory: 'filters/video/fix_vfr_pts.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/select_every.c'
clang: error: no such file or directory: 'filters/video/select_every.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/crop.c'
clang: error: no such file or directory: 'filters/video/crop.o'
clang: error: no input files
clang: error: no such file or directory: '/filters/video/depth.c'
clang: error: no such file or directory: 'filters/video/depth.o'
clang: error: no input files
clang: error: no such file or directory: '/extras/getopt.c'
clang: error: no such file or directory: 'extras/getopt.o'
clang: error: no input files
make: *** [.depend] Error 1

    How to enable pthread support?

  • Encoding Android Camera Frames h263/h264 [closed]

    29 décembre 2015, par Another Guy

    I want to implement a Video Chatting app on Android . I created a SurfaceView , get Camera preview and captured the frame as a byte[ ] using Camera.PreviewCallback.onPreviewFrame( ) method . Now I want to encode that byte[ ] to a h263 frame , pass over the network . Also get similar type of frame over network , decode it to a byte[ ] ( or a displayable format ) , and show it in a View . I want to do it at least 15 FPS rate . I am asking help for the encoding/decoding part .

    For that purpose , which library would be suitable for me ? From where I should start ? Is my starting point wrong ? Is there any support on SDK or would I have to use NDK ? I have heard about FFMpeg/x264 library , but I could not figure out how I can use them in my purpose . It's highly appreciated If you name any library , any reference , learning path , link or code snippet . Can you help me saying any workflow I should follow ? What if I want to use h264 encoding ? I just want to get it done , GPL/LGPL license of library would not matter a lot .

    I am a beginner in Android development . Any kind of assistance would be highly appreciated . Thanks in advance .

  • Latency in Gst-rtsp-server using appsrc

    18 décembre 2015, par alasin

    I'm trying to setup my own appsrc based Gst-rtsp-server which captures frames through Directshow, encodes to h264 stream and broadcasts the stream over LAN. Using this example as a reference, I have something like this:

    void need_data(GstElement *appsrc, guint unused, MyContext *ctx)
{
    buffer = gst_buffer_new_allocate(NULL, size, NULL);

    captureThread->setMutex();

    gst_buffer_map (buffer, &info, GST_MAP_WRITE);
    memcpy (info.data, captureThread->getFrame(), size);
    gst_buffer_unmap (buffer, &info);

    /* Increment the timestamp for 25 fps */
    GST_BUFFER_PTS(buffer)      = ctx->timestamp;
    GST_BUFFER_DURATION(buffer) = gst_util_uint64_scale_int(1, GST_SECOND, 40);
    ctx->timestamp             += GST_BUFFER_DURATION(buffer);

    g_signal_emit_by_name(appsrc, "push-buffer", buffer, &ret);

    captureThread->unsetMutex();
}

void media_configure(GstRTSPMediaFactory *factory, GstRTSPMedia *media, gpointer user_data)
{
    GstElement *element, *appsrc;
    MyContext  *ctx;

    /* get the element used for providing the streams of the media */
    element = gst_rtsp_media_get_element(media);

    /* get our appsrc, we named it 'mysrc' with the name property */
    appsrc = gst_bin_get_by_name_recurse_up(GST_BIN(element), "mysrc");

    /* this instructs appsrc that we will be dealing with timed buffer */
    gst_util_set_object_arg(G_OBJECT(appsrc), "format", "time");

    /* configure the caps of the video */
    g_object_set(G_OBJECT(appsrc), "caps",
             gst_caps_new_simple("video/x-raw",
                                 "format", G_TYPE_STRING, "NV12",
                                 "width", G_TYPE_INT, 640,
                                 "height", G_TYPE_INT, 480,
                                 "framerate", GST_TYPE_FRACTION, 25, 1, NULL), NULL);

    ctx = g_new0(MyContext, 1);
    ctx->timestamp = 0;

    /* make sure the data is freed when the media is gone */
    g_object_set_data_full(G_OBJECT(media), "my-extra-data", ctx, (GDestroyNotify)g_free);

    /* install the callback that will be called when a buffer is needed */
    g_signal_connect(appsrc, "need-data", (GCallback)need_data, ctx);
    gst_object_unref(appsrc);
    gst_object_unref(element);
}

int main(int argc, char *argv[])
{
    GMainLoop *loop;
    GstRTSPServer *server;
    GstRTSPMountPoints  *mounts;
    GstRTSPMediaFactory *factory;

    /* This thread captures frames from dshow source at 30fps */
    captureThread = new CaptureThread();
    captureThread->Launch();

    gst_init(&argc, &argv);

    loop   = g_main_loop_new(NULL, FALSE);
    server = gst_rtsp_server_new();

    /* get the mount points for this server, every server has a default object
     * that be used to map uri mount points to media factories */
    mounts  = gst_rtsp_server_get_mount_points(server);
    factory = gst_rtsp_media_factory_new();

    gst_rtsp_media_factory_set_launch(factory,
                                  "( appsrc name=mysrc ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 pt=96 )");

    gst_rtsp_media_factory_set_shared(GST_RTSP_MEDIA_FACTORY(factory), TRUE);

    //gst_rtsp_media_factory_set_latency(factory, 10);
    g_signal_connect(factory, "media-configure", (GCallback)media_configure, NULL);
    gst_rtsp_mount_points_add_factory(mounts, "/test", factory);

    /* don't need the ref to the mounts anymore */
    g_object_unref(mounts);

    /* attach the server to the default maincontext */
    gst_rtsp_server_attach(server, NULL);

    g_print("stream ready at rtsp://127.0.0.1:8554/test\n");
    g_main_loop_run(loop);

    return 0;
}

    I'm able to test the live feed at 25fps from a client but there's a constant lag offset of around 1 second. I've tried changing the fps, buffer timestamp and other things but the this lag still persists.

    Anything that could help me remove this lag would be much appreciated

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