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Optimizing x264 based remote desktop by dirty regions

17 novembre 2016, par useprxf
I was using x264 to achieve remote desktop, but had some problems on handling P_SKIP detection.

Dirty regions indicate changed areas. For those 16x16 macroblocks which don't intersect any dirty region, I would like to encode them as P_SKIP macroblocks.

I tried to add the following code into x264_macroblock_prob_skip_internal function:
```
if (! h->isdirty[h->mb.i_mb_x][h->mb.i_mb_y])       // isdirty is a 2-dim array indicating dirty macroblocks
    return 1;
```
but there is almost no speed-up. I think it may be the information preparation for the macroblock analysis that take influence.

How to speed up x264 by considering dirty regions?
Send H.264 encoded stream through RTMP using FFmpeg

15 novembre 2016, par Galaxy
I followed this to encode a sequences images to h.264 video.

Here is outputting part of my code:
```
int srcstride = outwidth*4;
sws_scale(convertCtx, src_data, &srcstride, 0, outheight, pic_in.img.plane, pic_in.img.i_stride);
x264_nal_t* nals;
int i_nals;
int frame_size = x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);
if (frame_size) {
    fwrite(nals[0].p_payload, frame_size, 1, fp);
}
```
This is in a loop to process frames and write them into a file.

Now, I'm trying to stream these encoded frames through RTMP. As I know, the container for the RTMP is FLV. So I used command line as a trial:
```
ffmpeg -i test.h264 -vcodec copy -f flv rtmp://localhost:1935/hls/test
```
This one works well as streaming a h.264 encoded video file.

But how can I implement it as C++ code and stream the frames at the same time when they are generated, just like what I did to stream my Facetime camera.
```
ffmpeg -f avfoundation -pix_fmt uyvy422  -video_size 1280x720 -framerate 30 -i "1:0" -pix_fmt yuv420p -vcodec libx264 -preset veryfast -acodec libvo_aacenc -f flv -framerate 30 rtmp://localhost:1935/hls/test
```
This may be a common and practical topic. But I'm stuck here for days, really need some relevant exprience. Thank you!
Send H.264 encoded stream through RTMP using FFmpeg

15 novembre 2016, par Galaxy
I followed this to encode a sequences images to h.264 video.

Here is outputting part of my code:
```
int srcstride = outwidth*4;
sws_scale(convertCtx, src_data, &srcstride, 0, outheight, pic_in.img.plane, pic_in.img.i_stride);
x264_nal_t* nals;
int i_nals;
int frame_size = x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);
if (frame_size) {
    fwrite(nals[0].p_payload, frame_size, 1, fp);
}
```
This is in a loop to process frames and write them into a file.

Now, I'm trying to stream these encoded frames through RTMP. As I know, the container for the RTMP is FLV. So I used command line as a trial:
```
ffmpeg -i test.h264 -vcodec copy -f flv rtmp://localhost:1935/hls/test
```
This one works well as streaming a h.264 encoded video file.

But how can I implement it as C++ code and stream the frames at the same time when they are generated, just like what I did to stream my Facetime camera.
```
ffmpeg -f avfoundation -pix_fmt uyvy422  -video_size 1280x720 -framerate 30 -i "1:0" -pix_fmt yuv420p -vcodec libx264 -preset veryfast -acodec libvo_aacenc -f flv -framerate 30 rtmp://localhost:1935/hls/test
```
This may be a common and practical topic. But I'm stuck here for days, really need some relevant exprience. Thank you!

Build FFMPEG with x264 for Android

12 novembre 2016, 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

How to Compile FFmpeg with x264 and libfdk-aac for Android

12 novembre 2016, par Codeveloper

Everyone.

Please understand that i use the wrong english.

I want to make encoding application using FFmpeg.

I was successfully building NDK with FFmpeg.

However, to encode H.264 video made had failed( Codec not found.. ).

I was learned that libx264 is need encode H.264 and libfdk-aac is need encode AAC.

so I tried to build the libx264 and libfdk-aac, But does not easily cross-compile.

Please tell me what I did wrong.

My Development Environment

OS : ubuntu 13.10 64bit

NDK : android-ndk-r9

FFmpeg : ffmpeg-2.0.2

x264 build : build_x264_android.sh

NDK=$ANDROID_NDK_HOME

TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
PLATFORM=$NDK/platforms/android-9/arch-arm
CPU=arm
PREFIX=$NDK/sources/ffmpeg-2.0.2/android/$CPU

./configure --prefix=$PREFIX \
    --enable-shared \
    --enable-pic \
    --disable-asm \
    --disable-cli \
    --host=arm-linux \
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    --sysroot=$PLATFORM

make
make install
ldconfig

fdk-aac build : build_aac_android.sh

NDK=$ANDROID_NDK_HOME
CROSS_PREFIX=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
PLATFORM=$NDK/platforms/android-9/arch-arm
CPU=arm
PREFIX=$NDK/sources/ffmpeg-2.0.2/android/$CPU
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a -mthumb -D__thumb__"

./configure --prefix=$PREFIX \
    --with-sysroot=$PLATFORM \
    --host=arm-linux \
    --enable-shared \
    --with-pic=no \
    CC="${CROSS_PREFIX}gcc --sysroot=$PLATFORM" \
    CXX="${CROSS_PREFIX}g++ --sysroot=$PLATFORM" \
    RANLIB="${CROSS_PREFIX}ranlib" \
    AR="${CROSS_PREFIX}ar" \
    STRIP="${CROSS_PREFIX}strip" \
    NM="${CROSS_PREFIX}nm" \
    CFLAGS="-O3 $OPTIMIZE_CFLAGS --sysroot=$PLATFORM" \
    CXXFLAGS="-O3 $OPTIMIZE_CFLAGS --sysroot=$PLATFORM"

make
make install

When I run 'build_aac_android.sh', shown error.

log in config.log

configure:2907: checking for arm-linux-gcc
configure:2934: result: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm
configure:3203: checking for C compiler version
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm --version >&5
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
configure:3223: $? = 127
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -v >&5
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
configure:3223: $? = 127
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -V >&5
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
configure:3223: $? = 127
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -qversion >&5
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
configure:3223: $? = 127
configure:3243: checking whether the C compiler works
configure:3265: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -O3 -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a -mthumb -D__thumb__ --sysroot=/platforms/android-9/arch-arm   conftest.c  >&5
./configure: line 3267: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory

configure:3312: error: in `/home/nel/android-ndk-r9/sources/ffmpeg-2.0.2/libfdk-aac':
    configure:3314: error: C compiler cannot create executables
    See `config.log' for more details

I cannot understand that error!! I was confirmed that arm-linux-androideabi-gcc is found in the directory..

I want to borrow you wisdom. Please tell me how to 'ffmpeg+x264+fdk-aac' build for android.

Thanks.. :-)

1 | ... | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | ... | 129

Newest 'x264' Questions - Stack Overflow

Les articles publiés sur le site

Optimizing x264 based remote desktop by dirty regions

Send H.264 encoded stream through RTMP using FFmpeg

Send H.264 encoded stream through RTMP using FFmpeg

Build FFMPEG with x264 for Android

How to Compile FFmpeg with x264 and libfdk-aac for Android

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