Ubuntu 16.04.5下FFmpeg编译与开发环境搭建

PC环境： Ubuntu 18.04 上面只要安装下面的提示安装即可，基本上不必再下载依赖库的源代码进行编译和安装

编译步骤：

1，安装相关工具：

sudo apt install -y autoconf automake build-essential git libass-dev libfreetype6-dev libsdl2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev libxcb-xfixes0-dev pkg-config texinfo wget zlib1g-dev
sudo apt install -y nasm yasm cmake mercurial

2，git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg,得到文件夹ffmpeg，进入ffmpeg文件夹：

./configure --enable-shared --prefix=/usr/local/ffmpeg

安装到/usr/local/ffmpeg下，可通过“--prefix=安装目录”进行修改。--enable-shared：指定生成动态库，默认是静态库。静态库不方便后续开发。

2.sudo make

3.sudo make install

3，添加ffmpeg库的链接:

在/etc/ld.so.conf中末尾添加 /usr/local/ffmpeg/lib 即可，执行

sudo ldconfig

4.安装VS Code

参考https://blog.csdn.net/u011258217/article/details/78693564

--------------------------------------------------- ubuntu 16.04.5 下还需要按照一下提示进行安装依赖 -------------------------------------

Ubuntu下安装和编译ffmpeg

参考：http://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

1、安装依赖包

sudo apt-get update

sudo apt-get -y --force-yes install autoconf automake build-essential libass-dev libfreetype6-dev \

  libsdl1.2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev \

  libxcb-xfixes0-dev pkg-config texi2html zlib1g-dev

2、建立安装包的源文件夹

mkdir ~/ffmpeg_sources

- ffmpeg_sources – 源文件.

- ffmpeg_build – 各种lib被安装在此文件夹.

- bin – 各种bin被安装在此文件夹

我已经把所需要的一下文件都下载整理，存在网盘，需要的可以直接获取链接：http://pan.baidu.com/s/1dD8RYEH 密码：xgoz

sudo apt install yasm libx264 libx265 libfdk-aac libmp3lame libopus libvpx -y

sudo apt install yasm libx264-dev libx265-dev libfdk-aac-dev libmp3lame-dev libopus-dev libvpx-dev -y

3、Yasm

cd ~/ffmpeg_sources

wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz

tar xzvf yasm-1.3.0.tar.gz

cd yasm-1.3.0

./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin"

make

make install

make distclean

4、libx264

cd ~/ffmpeg_sources

wget http://download.videolan.org/pub/x264/snapshots/last_x264.tar.bz2

tar xjvf last_x264.tar.bz2

cd x264-snapshot*

PATH="$HOME/bin:$PATH" ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" --enable-static

PATH="$HOME/bin:$PATH" make

make install

make distclean

问题：不知道是不是环境变量的关系，很多标准command不能用，参考另一个笔记：linux下提示bash:command not found

export PATH=/bin:/sbin:/usr/bin:/usr/sbin

5、libx265

265的源一直没下载下来，也暂时不用x265，所以没有安装，后续编译ffmpeg不编译x265就可以。

6、libfdk-aac

cd ~/ffmpeg_sources
wget -O fdk-aac.tar.gz https://github.com/mstorsjo/fdk-aac/tarball/master  
git clone https://github.com/mstorsjo/fdk-aac.git

https://github.com/mstorsjo/fdk-aac/archive/master.zip

tar xzvf fdk-aac.tar.gz

cd mstorsjo-fdk-aac* 
autoreconf -fiv 
./configure --prefix="$HOME/ffmpeg_build" --disable-shared 
make 
make install 
make distclean

7、libmp3lame

sudo apt-get install nasm

cd ~/ffmpeg_sources

wget http://downloads.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz

tar xzvf lame-3.99.5.tar.gz

cd lame-3.99.5

./configure --prefix="$HOME/ffmpeg_build" --enable-nasm --disable-shared

make

make install

make distclean

8、libopus

cd ~/ffmpeg_sources

wget http://downloads.xiph.org/releases/opus/opus-1.1.tar.gz

tar xzvf opus-1.1.tar.gz

cd opus-1.1

./configure --prefix="$HOME/ffmpeg_build" --disable-shared

make

make install

make distclean

9、libvpx

cd ~/ffmpeg_sources

wget http://webm.googlecode.com/files/libvpx-v1.3.0.tar.bz2     ## ！！！！！   这个应该下不下来，可以百度一下替代， 换上最新版本的，不要用这个，有点太低了。

http://ftp.osuosl.org/pub/blfs/conglomeration/libvpx/

wget -c  http://ftp.osuosl.org/pub/blfs/conglomeration/libvpx/libvpx-1.7.0.tar.gz

tar xjvf libvpx-v1.3.0.tar.bz2

cd libvpx-v1.3.0

PATH="$HOME/bin:$PATH" ./configure --prefix="$HOME/ffmpeg_build" --disable-examples --disable-unit-tests

PATH="$HOME/bin:$PATH" make

make install

make clean

                  ##  下面的这个不必了，直接上github上下载源码即可，  https://github.com/FFmpeg/FFmpeg.git
安装编译ffmpeg

cd ~/ffmpeg_sources

wget http://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2

tar xjvf ffmpeg-snapshot.tar.bz2

cd ffmpeg

PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \

  --prefix="$HOME/ffmpeg_build" \

  --pkg-config-flags="--static" \

  --extra-cflags="-I$HOME/ffmpeg_build/include" \

  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \

  --bindir="$HOME/bin" \

  --enable-gpl \

  --enable-libass \

  --enable-libfdk-aac \

  --enable-libfreetype \

  --enable-libmp3lame \

  --enable-libopus \

  --enable-libtheora \

  --enable-libvorbis \

  --enable-libvpx \

  --enable-libx264 \

  --enable-libx265 \

  --enable-nonfree

PATH="$HOME/bin:$PATH" make

make install

make distclean

hash -r
查看ffmpeg是否安装成功，用ffmpeg -version

之后我们就可以使用ffmpeg 将文件转化成ts文件，以备m3u8-segmenter切片，搭建hls流媒体服务器。

另外有参考源代码：

https://github.com/lspbeyond/p264decoder.git

思科家的： https://github.com/cisco/openh264.git

--------------------------------------------------------------------------- 分割线 -------------------------------------------------------------------------

5.测试环境

#include <stdio.h>

#include <libavformat/avformat.h>

#include <libswscale/swscale.h>

#include <libavfilter/avfilter.h>

#define dbmsgc(fmt, args ...) printf("cong:%s[%d]: "fmt"\n", __FUNCTION__, __LINE__,##args)

//#define dbmsg(fmt, args ...) printf("cong:%s:%s[%d]: "fmt"\n",__FILE__, __FUNCTION__, __LINE__,##args)

int main(int argc, char **argv)

{

    int i=0;

    AVFormatContext *pFormatCtx = NULL;

    avcodec_register_all();

#if CONFIG_AVDEVICE

    avdevice_register_all();

#endif

   avfilter_register_all();

    av_register_all();

    if(avformat_open_input(&pFormatCtx, argv[1], NULL, NULL)!=0)

        return -1; // Couldn't open file

    if(avformat_find_stream_info(pFormatCtx, NULL)<0)

        return -1; // Couldn't find stream inform

    av_dump_format(pFormatCtx,0, 0, 0);

    return 0;

}

6..编写Makefile

FFMPEG=/usr/local/ffmpeg

CC=gcc

CFLAGS=-g -I$(FFMPEG)/include

LDFLAGS = -L$(FFMPEG)/lib/ -lswscale -lswresample -lavformat -lavdevice -lavcodec -lavutil -lavfilter  -lm

TARGETS=test

all: $(TARGETS)

test:test.c

    $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) -std=c++11 #注意这里的-std=c++11

clean:

    rm -rf $(TARGETS)

7.make

8../test

测试代码2：

/*

 * Copyright (c) 2015 Ludmila Glinskih

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

/**

 * H264 codec test.

 */

#include "libavutil/adler32.h"

#include "libavcodec/avcodec.h"

#include "libavformat/avformat.h"

#include "libavutil/imgutils.h"

static int video_decode_example(const char *input_filename)

{

    AVCodec *codec = NULL;

    AVCodecContext *ctx= NULL;

    AVCodecParameters *origin_par = NULL;

    AVFrame *fr = NULL;

    uint8_t *byte_buffer = NULL;

    AVPacket pkt;

    AVFormatContext *fmt_ctx = NULL;

    int number_of_written_bytes;

    int video_stream;

    int got_frame = 0;

    int byte_buffer_size;

    int i = 0;

    int result;

    int end_of_stream = 0;

    result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);

    if (result < 0) {

        av_log(NULL, AV_LOG_ERROR, "Can't open file\n");

        return result;

    }

    result = avformat_find_stream_info(fmt_ctx, NULL);

    if (result < 0) {

        av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");

        return result;

    }

    video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);

    if (video_stream < 0) {

      av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");

      return -1;

    }

    origin_par = fmt_ctx->streams[video_stream]->codecpar;

    codec = avcodec_find_decoder(origin_par->codec_id);

    if (!codec) {

        av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");

        return -1;

    }

    ctx = avcodec_alloc_context3(codec);

    if (!ctx) {

        av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");

        return AVERROR(ENOMEM);

    }

    result = avcodec_parameters_to_context(ctx, origin_par);

    if (result) {

        av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");

        return result;

    }

    result = avcodec_open2(ctx, codec, NULL);

    if (result < 0) {

        av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");

        return result;

    }

    fr = av_frame_alloc();

    if (!fr) {

        av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");

        return AVERROR(ENOMEM);

    }

    byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 16);

    byte_buffer = av_malloc(byte_buffer_size);

    if (!byte_buffer) {

        av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");

        return AVERROR(ENOMEM);

    }

    printf("#tb %d: %d/%d\n", video_stream, fmt_ctx->streams[video_stream]->time_base.num, fmt_ctx->streams[video_stream]->time_base.den);

    i = 0;

    av_init_packet(&pkt);

    do {

        if (!end_of_stream)

            if (av_read_frame(fmt_ctx, &pkt) < 0)

                end_of_stream = 1;

        if (end_of_stream) {

            pkt.data = NULL;

            pkt.size = 0;

        }

        if (pkt.stream_index == video_stream || end_of_stream) {

            got_frame = 0;

            if (pkt.pts == AV_NOPTS_VALUE)

                pkt.pts = pkt.dts = i;

            result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);

            if (result < 0) {

                av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");

                return result;

            }

            if (got_frame) {

                number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,

                                        (const uint8_t* const *)fr->data, (const int*) fr->linesize,

                                        ctx->pix_fmt, ctx->width, ctx->height, 1);

                if (number_of_written_bytes < 0) {

                    av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");

                    return number_of_written_bytes;

                }

                printf("%d, %10"PRId64", %10"PRId64", %8"PRId64", %8d, 0x%08lx\n", video_stream,

                        fr->pts, fr->pkt_dts, fr->pkt_duration,

                        number_of_written_bytes, av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes));

            }

            av_packet_unref(&pkt);

            av_init_packet(&pkt);

        }

        i++;

    } while (!end_of_stream || got_frame);

    av_packet_unref(&pkt);

    av_frame_free(&fr);

    avcodec_close(ctx);

    avformat_close_input(&fmt_ctx);

    avcodec_free_context(&ctx);

    av_freep(&byte_buffer);

    return 0;

}

int main(int argc, char **argv)

{

    if (argc < 2)

    {

        av_log(NULL, AV_LOG_ERROR, "Incorrect input\n");

        return 1;

    }

    if (video_decode_example(argv[1]) != 0)

        return 1;

    return 0;

}

测试代码3：

/*

 * Copyright (c) 2015 Ludmila Glinskih

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

/**

 * draw_horiz_band test.

 */

#include "libavutil/adler32.h"

#include "libavcodec/avcodec.h"

#include "libavformat/avformat.h"

#include "libavutil/imgutils.h"

uint8_t *slice_byte_buffer;

uint8_t slice_byte_buffer_size;

int draw_horiz_band_called;

static void draw_horiz_band(AVCodecContext *ctx, const AVFrame *fr, int offset[4],

                            int slice_position, int type, int height)

{

    int i;

    const AVPixFmtDescriptor *pix_fmt_desc;

    int chroma_w, chroma_h;

    int shift_slice_position;

    int shift_height;

    draw_horiz_band_called = 1;

    pix_fmt_desc = av_pix_fmt_desc_get(ctx->pix_fmt);

    chroma_w = -((-ctx->width) >> pix_fmt_desc->log2_chroma_w);

    chroma_h = -((-height) >> pix_fmt_desc->log2_chroma_h);

    shift_slice_position = -((-slice_position) >> pix_fmt_desc->log2_chroma_h);

    shift_height = -((-ctx->height) >> pix_fmt_desc->log2_chroma_h);

    for (i = 0; i < height; i++) {

        memcpy(slice_byte_buffer + ctx->width * slice_position + i * ctx->width,

               fr->data[0] + offset[0] + i * fr->linesize[0], ctx->width);

    }

    for (i = 0; i < chroma_h; i++) {

        memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_slice_position + i * chroma_w,

               fr->data[1] + offset[1] + i * fr->linesize[1], chroma_w);

    }

    for (i = 0; i < chroma_h; i++) {

        memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_height + chroma_w * shift_slice_position + i * chroma_w,

               fr->data[2] + offset[2] + i * fr->linesize[2], chroma_w);

    }

}

static int video_decode(const char *input_filename)

{

    AVCodec *codec = NULL;

    AVCodecContext *ctx= NULL;

    AVCodecParameters *origin_par = NULL;

    uint8_t *byte_buffer = NULL;

    AVFrame *fr = NULL;

    AVPacket pkt;

    AVFormatContext *fmt_ctx = NULL;

    int number_of_written_bytes;

    int video_stream;

    int got_frame = 0;

    int byte_buffer_size;

    int result;

    int end_of_stream = 0;

    draw_horiz_band_called = 0;

    result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);

    if (result < 0) {

        av_log(NULL, AV_LOG_ERROR, "Can't open file\n");

        return result;

    }

    result = avformat_find_stream_info(fmt_ctx, NULL);

    if (result < 0) {

        av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");

        return result;

    }

    video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);

    if (video_stream < 0) {

      av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");

      return -1;

    }

    origin_par = fmt_ctx->streams[video_stream]->codecpar;

    codec = avcodec_find_decoder(origin_par->codec_id);

    if (!codec) {

        av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");

        return -1;

    }

    ctx = avcodec_alloc_context3(codec);

    if (!ctx) {

        av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");

        return AVERROR(ENOMEM);

    }

    result = avcodec_parameters_to_context(ctx, origin_par);

    if (result) {

        av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");

        return result;

    }

    ctx->draw_horiz_band = draw_horiz_band;

    ctx->thread_count = 1;

    result = avcodec_open2(ctx, codec, NULL);

    if (result < 0) {

        av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");

        return result;

    }

    fr = av_frame_alloc();

    if (!fr) {

        av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");

        return AVERROR(ENOMEM);

    }

    if (strcmp(codec->name, "flv") && strcmp(codec->name, "mpeg4") && strcmp(codec->name, "huffyuv")) {

        av_log(NULL, AV_LOG_ERROR, "Wrong codec\n");

        return -1;

    }

    byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 32);

    byte_buffer = av_malloc(byte_buffer_size);

    if (!byte_buffer) {

        av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");

        return AVERROR(ENOMEM);

    }

    slice_byte_buffer = av_malloc(byte_buffer_size);

    if (!slice_byte_buffer) {

        av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");

        return AVERROR(ENOMEM);

    }

    memset(slice_byte_buffer, 0, byte_buffer_size);

    slice_byte_buffer_size = byte_buffer_size;

    av_init_packet(&pkt);

    do {

        if (!end_of_stream) {

            if (av_read_frame(fmt_ctx, &pkt) < 0) {

                end_of_stream = 1;

            }

        }

        if (end_of_stream) {

            pkt.data = NULL;

            pkt.size = 0;

        }

        if (pkt.stream_index == video_stream || end_of_stream) {

            got_frame = 0;

            result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);

            if (result < 0) {

                av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");

                return result;

            }

            if (got_frame) {

                number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,

                                        (const uint8_t* const *)fr->data, (const int*) fr->linesize,

                                        ctx->pix_fmt, ctx->width, ctx->height, 1);

                if (number_of_written_bytes < 0) {

                    av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");

                    return number_of_written_bytes;

                }

                if (draw_horiz_band_called == 0) {

                    av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");

                    return -1;

                }

                if (av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes) !=

                    av_adler32_update(0, (const uint8_t*)slice_byte_buffer, number_of_written_bytes)) {

                    av_log(NULL, AV_LOG_ERROR, "Decoded frames with and without draw_horiz_band are not the same!\n");

                    return -1;

                }

            }

            av_packet_unref(&pkt);

            av_init_packet(&pkt);

        }

    } while (!end_of_stream || got_frame);

    av_packet_unref(&pkt);

    av_frame_free(&fr);

    avcodec_close(ctx);

    avformat_close_input(&fmt_ctx);

    avcodec_free_context(&ctx);

    av_freep(&byte_buffer);

    av_freep(&slice_byte_buffer);

    return 0;

}

int main(int argc, char **argv)

{

    if (argc < 2)

    {

        av_log(NULL, AV_LOG_ERROR, "Incorrect input: expected %s <name of a video file>\nNote that test works only for huffyuv, flv and mpeg4 decoders\n", argv[0]);

        return 1;

    }

    if (video_decode(argv[1]) != 0)

        return 1;

    return 0;

}

本文参考了：

https://blog.csdn.net/wawayu_0/article/details/80564349

https://www.cnblogs.com/candycaicai/p/4689459.html

特此致谢。

Ubuntu 16.04.5下FFmpeg编译与开发环境搭建的更多相关文章

配置ubuntu 16.04.1 LTS odoo 10.0开发环境
使用VMware Fusion 8.5.0创建ubuntu 64bit虚拟机:使用ubuntu-16.04.1-desktop-amd64.iso镜像缺省安装ubuntu,用户名odoo,密码1234 ...
在Ubuntu 16.04 LTS下编译安装OpenCV 4.1.1
目录一安装前的准备二编译并安装OpenCV 4.1.1 注:原创不易,转载请务必注明原作者和出处,感谢支持! OpenCV目前(2019-8-1)的最新版本为4.1.1.本文将介绍如何在Ubu ...
Ubuntu 16.04.4下安装apache服务
Ubuntu 16.04.4下安装apache服务: 一.首先,准备需要的预装环境需要c++,make,gcc,apr apr-util pcre.(如果后面报错缺少什么组件,可以百度搜方法. ...
Ubuntu 16.04系统下安装Discuz出现“HTTP ERROR 500”目前无法处理此请求
问题:当我们在Ubuntu 16.04系统下安装Disucz X3时,修改好文件的权限,浏览器输入地址安装时出现如下图所示问题: 问题查询: 在终端输入: tail -f /var/log/apach ...
FFmpeg开发笔记（三）：ffmpeg介绍、windows编译以及开发环境搭建
前言本篇章是对之前windows环境的补充,之前windows的是无需进行编译的,此篇使用源码进行编译,版本就使用3.4.8. FFmpeg简介 FFmpeg是领先的多媒体框架,能够解码 ...
mac10.9下eclipse的storm开发环境搭建
--------------------------------------- 博文作者:迦壹博客地址:http://idoall.org/home.php?mod=space&uid=1& ...
win10 + VS2010 + OpenCV2.4.10重编译OpenCV开发环境搭建
win10 + VS2010 + OpenCV2.4.10重编译OpenCV开发环境搭建重编译的优点:能够调试的时候看OpenCV的源码. 重编译要得到的东西:Debug版本号和Release版本号 ...
《Node.js入门》CentOS 6.5下Node.js Web开发环境搭建笔记
近期想尝试一下英特尔的基于WebRTC协同通信开发套件,所以须要在本地搭建Node.js Web的开发測试环境. 这里讲的是CentOS 下的搭建方法.使用Windows的小伙伴请參考: <No ...
Ubuntu 16.04上源码编译和安装pytorch教程，并编写C++ Demo CMakeLists.txt | tutorial to compile and use pytorch on ubuntu 16.04
本文首发于个人博客https://kezunlin.me/post/54e7a3d8/,欢迎阅读最新内容! tutorial to compile and use pytorch on ubuntu ...

随机推荐

Codeforces Round #503 (by SIS, Div. 2) C. Elections（枚举，暴力)
原文地址 C. Elections time limit per test 2 seconds memory limit per test 256 megabytes input standard i ...
[BZOJ 4031] 小Z的房间
Link: BZOJ 4031 传送门 Solution: 矩阵树定理的模板题看完下面两篇文章就会啦: 周冬论文:https://wenku.baidu.com/view/872eb02de2bd9 ...
MTD
内存技术设备(英语:Memory Technology Device,缩写为 MTD),是Linux系统中设备文件系统的一个类别,主要用于快闪存储器的应用,是一种快闪存储器转换层(Flash Tran ...
zookeeper 学习笔记2
ephemeral 英[ɪˈfemərəl]美[ɪˈfɛmərəl]adj. 朝生暮死; 短暂的,瞬息的; 朝露; 一年生; ZooKeeper Watcher 机制集群状态监控示例为了确保集群能 ...
IOS提示控件UIActionSheet,UIAlertView
iphone中常用的消息提示控件,就是UIActionSheet和UIAlertView了,在Web开发中,UIActionSheet就像是confirm(),而UIAlertView就像是alert ...
Java获取运行环境信息
在做视频截取封面的时候用到了ffmpeg.我采用的是通过Java调用bat或sh脚本然后生成图片文件. 在线上使用的是Centos 7.所以程序中需要获取到当前运行环境的信息来选择调用bat命令还是s ...
ANGULARJS: UNDERSTANDING DIRECTIVE SCOPE
https://www.3pillarglobal.com/insights/angularjs-understanding-directive-scope --------------------- ...
转: 由socket的accept说开去
from: http://ticktick.blog.51cto.com/823160/779866 今天与同学争执一个话题:由于socket的accept函数在有客户端连接的时候产生了新的socke ...
OC第五课
主要内容:字典.集合.数组排序一.字典演示样例: name : @" 张三 " .sex:@" 男 " ; age :@" 21 " ; ...
EffectiveJava（15）强化对象和域的不可变性
概念: 不可变类是其实例不能被修改的类,不可变类比可变类更加易于设计实现和使用.它们不容易出错,而且更加安全. 优点 1.不可变对象只有创建时状态. 2.不可变对象本质上是线程安全的,它们不要求同步 ...

Ubuntu 16.04.5下FFmpeg编译与开发环境搭建

Ubuntu 16.04.5下FFmpeg编译与开发环境搭建的更多相关文章

随机推荐

热门专题