gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu<\/code>\u3002<\/p>\n \u6211\u4eec\u5c06\u5176\u653e\u5230Host\u4e0a\u89e3\u538b\u5373\u53ef\uff0c\u662f\u5426\u9700\u8981\u914d\u7f6e\u73af\u5883\u53d8\u91cf\u770b\u4e2a\u4eba\u4e60\u60ef\u5373\u53ef\u3002<\/p>\n
\u4e8c\u3001\u7f16\u8bd1FFmpeg<\/h2>\n
\u81ea\u884c\u5728FFmpeg.org<\/code>\u6216\u8005git<\/code>\u4e0a\u4e0b\u8f7dFFmpeg\uff0c\u6211\u4f7f\u7528\u7684\u7248\u672c\u662f4.3.1\u3002<\/p>\n \u8fdb\u5165FFmpeg\u76ee\u5f55\uff0c\u521b\u5efa\u4e00\u4e2a\u811a\u672c\u7528\u6765\u63a7\u5236\u914d\u7f6econfigure<\/code>\u6587\u4ef6\u3002<\/p>\n#!\/bin\/bash\n\nexport TOOLS=\/home\/xjt\/Gogs\/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu\nexport SYSROOT=${TOOLS}\/aarch64-none-linux-gnu\/libc\n# export PREFIX=.\/linux\/arm64\nexport LD=${TOOLS}\/bin\/aarch64-none-linux-gnu-ld\nexport AR=${TOOLS}\/bin\/aarch64-none-linux-gnu-ar\nexport RANLIB=${TOOLS}\/bin\/aarch64-none-linux-gnu-ranlib\n\nfunction build_lib\n{\n .\/configure \\\n --disable-shared \\\n --enable-static \\\n --prefix=$PREFIX \\\n --cross-prefix=${TOOLS}\/bin\/aarch64-linux-gnu- \\\n --cc=${TOOLS}\/bin\/aarch64-none-linux-gnu-gcc \\\n --nm=${TOOLS}\/bin\/aarch64-none-linux-gnu-g++ \\\n --ld=${LD} \\\n --ar=${AR} \\\n --ranlib=${RANLIB} \\\n --target-os=linux \\\n --arch=arm64 \\\n --sysroot=$SYSROOT \\\n --enable-runtime-cpudetect \\\n --enable-cross-compile \\\n --enable-pic \\\n --enable-gpl \\\n --enable-nonfree \\\n --enable-yasm \\\n --enable-muxer=mpeg4 \\\n --enable-muxer=rtsp \\\n --enable-encoder=mpeg4 \\\n --enable-decoder=mpeg4 \\\n --enable-network \\\n --enable-protocol=tcp \\\n --enable-pthreads \\\n --disable-ffmpeg \\\n --disable-ffplay \\\n --disable-ffprobe \\\n --disable-avdevice \\\n --disable-doc \\\n --extra-ldflags="-L${SYSROOT}\/libc\/lib -L\/home\/xjt\/Gogs\/x264\/install\/lib -lc" \\\n --extra-cflags="-I${SYSROOT}\/libc\/usr\/include -I\/home\/xjt\/Gogs\/x264\/install\/include -Wfatal-errors -Wno-deprecated"\n # --enable-libx264 \\\n # --extra-libs=-ldl\n}\nbuild_lib<\/code><\/pre>\n\u6ce8\u610f\uff1a<\/strong><\/p>\n\n- \u8fd9\u91cc\u5982\u679c\u9700\u8981\u9759\u6001\u94fe\u63a5
x264<\/code>\uff0c\u5219\u9700\u8981\u5728\u540e\u9762\u52a0\u4e0a--extra-libs=-ldl<\/code>\u3002<\/li>\n- RTSP\u9700\u8981
--enable-network<\/code>\u3001--enable-protocol=tcp<\/code>\u3001--enable-muxer=rtsp<\/code>\u3002<\/li>\n<\/ol>\n \u63a5\u4e0b\u6765\u914d\u7f6econfigure<\/code>\u3001make<\/code>\u3001make install<\/code>\u5373\u53ef\u3002<\/p>\n.\/build.sh\nmake -j8\nmake install<\/code><\/pre>\n\u4e4b\u540e\u5728PREFIX<\/code>\u76ee\u5f55\u4e0b\u627e\u5230\u8f93\u51fa\uff0c\u4e00\u822c\u6709include<\/code>\u3001lib<\/code>\u548cshare<\/code>\u3002<\/p>\n\u4e09\u3001\u5e94\u7528\u7a0b\u5e8f<\/h2>\n
\u5e94\u7528\u7a0b\u5e8f\u76ee\u5f55\u5982\u4e0b\uff1a<\/p>\n
.\n\u251c\u2500\u2500 build\n\u2502 \u251c\u2500\u2500 bin\n\u2502 \u251c\u2500\u2500 CMakeCache.txt\n\u2502 \u251c\u2500\u2500 CMakeFiles\n\u2502 \u251c\u2500\u2500 cmake_install.cmake\n\u2502 \u2514\u2500\u2500 Makefile\n\u251c\u2500\u2500 CMakeLists.txt\n\u251c\u2500\u2500 lib\n\u2502 \u251c\u2500\u2500 ffmpeg\n\u2502 \u2514\u2500\u2500 x264\n\u2514\u2500\u2500 src\n \u251c\u2500\u2500 CMakeLists.txt\n \u251c\u2500\u2500 main.cpp\n \u251c\u2500\u2500 v4l2_stream.c\n \u2514\u2500\u2500 v4l2_stream.h<\/code><\/pre>\n3.1 .\/CMakeLists.txt<\/h3>\nPROJECT(RK3568_APP)\n\nCMAKE_MINIMUM_REQUIRED(VERSION 3.5)\n\nSET(COMPILER_PATH "\/home\/xjt\/Gogs\/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu")\nSET(CMAKE_C_COMPILER ${COMPILER_PATH}\/bin\/aarch64-none-linux-gnu-gcc)\nSET(CMAKE_CXX_COMPILER ${COMPILER_PATH}\/bin\/aarch64-none-linux-gnu-g++)\n\nSET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -s -O3 -lc -ldl -lrt -lm")\nSET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -s -O3 -lstdc++ -lc -ldl -lrt -lm")\n\n# INCLUDE_DIRECTORIES(.\/lib\/x264\/include)\n# LINK_DIRECTORIES(.\/lib\/x264\/lib)\nINCLUDE_DIRECTORIES(.\/lib\/ffmpeg\/include)\nLINK_DIRECTORIES(.\/lib\/ffmpeg\/lib)\n\nSET(CMAKE_EXE_LINKER_FLAGS "-static")\nADD_SUBDIRECTORY(src bin)<\/code><\/pre>\n3.2 .\/src\/CMakeLists.txt<\/h3>\nFILE(\n GLOB_RECURSE SRC_LIST \n .\/*.c\n .\/*.cpp\n)\n\n# Exe output path\nSET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR\/bin})\n\nADD_EXECUTABLE(demo ${SRC_LIST})\n\nTARGET_LINK_LIBRARIES(\n demo\n\n # x264;\n\n avformat;\n swscale;\n avcodec;\n avutil;\n swresample;\n\n pthread;\n)<\/code><\/pre>\n3.3 .\/src\/main.cpp<\/h3>\n#include <chrono>\n#include <thread>\n#include <iostream>\n#include <cstdio>\n\n#ifdef __cplusplus\nextern "C" {\n#endif\n\n#include <stdio.h>\n#include <libavcodec\/avcodec.h>\n#include <libavformat\/avformat.h>\n#include <libavutil\/opt.h>\n#include <libavutil\/time.h>\n#include <libswscale\/swscale.h>\n#include <libavutil\/avutil.h>\n#include <libavutil\/imgutils.h>\n#include <libswresample\/swresample.h>\n#include <pthread.h>\n#include "v4l2_stream.h"\n\n#ifdef __cplusplus \n}\n#endif\n\n\/\/ using namespace std;\n\nstatic int video_is_eof;\n\n#define STREAM_FRAME_RATE 60\n#define STREAM_PIX_FMT AV_PIX_FMT_YUV420P \/* default pix_fmt *\/\n#define VIDEO_CODEC_ID AV_CODEC_ID_MPEG4\n\n\/* video output *\/\nstatic AVFrame *frame;\nstatic AVPicture src_picture, dst_picture;\n\nuint8_t input[640 * 480 * 2];\nuint8_t output[640 * 480 * 2];\nuint8_t output_128[640 * 480];\n\n\/* Add an output stream. *\/\nstatic AVStream *add_stream(AVFormatContext *oc, AVCodec **codec, enum AVCodecID codec_id)\n{\n AVCodecContext *c;\n AVStream *st;\n\n \/* find the encoder *\/\n *codec = avcodec_find_encoder(codec_id);\n if (!(*codec)) {\n av_log(NULL, AV_LOG_ERROR, "Could not find encoder for '%s'.\\n", avcodec_get_name(codec_id));\n }\n else {\n st = avformat_new_stream(oc, *codec);\n if (!st) {\n av_log(NULL, AV_LOG_ERROR, "Could not allocate stream.\\n");\n }\n else {\n st->id = oc->nb_streams - 1;\n st->time_base.den = STREAM_FRAME_RATE;\n st->time_base.num = 1;\n\n c = st->codec;\n c->codec_id = codec_id;\n c->bit_rate = 16000000;\n c->width = 640;\n c->height = 480;\n c->time_base.den = STREAM_FRAME_RATE;\n c->time_base.num = 1;\n c->gop_size = 15;\n c->pix_fmt = STREAM_PIX_FMT;\n }\n }\n\n return st;\n}\n\nstatic int open_video(AVFormatContext *oc, AVCodec *codec, AVStream *st)\n{\n int ret;\n AVCodecContext *c = st->codec;\n \/\/ AVCodecContext *c = avcodec_alloc_context3(codec);\n\n \/* open the codec *\/\n ret = avcodec_open2(c, codec, NULL);\n if (ret < 0) {\n av_log(NULL, AV_LOG_ERROR, "Could not open video codec.\\n", avcodec_get_name(c->codec_id));\n }\n else {\n\n \/* allocate and init a re-usable frame *\/\n frame = av_frame_alloc();\n if (!frame) {\n av_log(NULL, AV_LOG_ERROR, "Could not allocate video frame.\\n");\n ret = -1;\n }\n else {\n frame->format = c->pix_fmt;\n frame->width = c->width;\n frame->height = c->height;\n\n \/* Allocate the encoded raw picture. *\/\n ret = avpicture_alloc(&dst_picture, c->pix_fmt, c->width, c->height);\n if (ret < 0) {\n av_log(NULL, AV_LOG_ERROR, "Could not allocate picture.\\n");\n }\n else {\n \/* copy data and linesize picture pointers to frame *\/\n *((AVPicture *)frame) = dst_picture;\n }\n }\n }\n\n return ret;\n}\n\nint VIDEOWRAP_YUYV422_to_YUV420P(int imgWidth, int imgHeight, uint8_t* inputData, uint8_t* outputData, int inputLength)\n{\n struct SwsContext* ctx = sws_getContext(imgWidth, imgHeight, AV_PIX_FMT_YUYV422,\n imgWidth, imgHeight, AV_PIX_FMT_YUV420P,\n SWS_BICUBIC, NULL, NULL, NULL);\n if (!ctx) {\n fprintf(stderr, "Failed to allocate SwsContext.\\n");\n return -1; \/\/ Error handling\n }\n\n struct AVFrame* input_pFrame = av_frame_alloc();\n struct AVFrame* output_pFrame = av_frame_alloc();\n if (!input_pFrame || !output_pFrame) {\n fprintf(stderr, "Failed to allocate AVFrame.\\n");\n if (input_pFrame) av_frame_free(&input_pFrame);\n if (output_pFrame) av_frame_free(&output_pFrame);\n sws_freeContext(ctx);\n return -1; \/\/ Error handling\n }\n\n av_image_fill_arrays(input_pFrame->data, input_pFrame->linesize, inputData, AV_PIX_FMT_YUYV422, imgWidth, imgHeight, 1);\n av_image_fill_arrays(output_pFrame->data, output_pFrame->linesize, outputData, AV_PIX_FMT_YUV420P, imgWidth, imgHeight, 1);\n\n sws_scale(ctx,\n (const uint8_t**)input_pFrame->data, input_pFrame->linesize, 0, imgHeight,\n output_pFrame->data, output_pFrame->linesize);\n\n#if 0\n FILE *fl;\n fl = fopen("img.yuv", "w");\n if (NULL == fl)\n {\n fprintf(stderr, "open write file failed.");\n }\n fwrite(outputData, inputLength * 1.5, 1, fl);\n fclose(fl);\n#endif\n\n \/\/ Release allocated resources\n av_frame_free(&input_pFrame);\n av_frame_free(&output_pFrame);\n sws_freeContext(ctx);\n\n return 0;\n}\n\n\/* Prepare a dummy image. *\/\nstatic void fill_yuv_image(AVPicture *pict, int frame_index, int width, int height)\n{\n int x, y, i;\n\n i = frame_index;\n\n memcpy(input, v4l2_sp_globalBuffer[v4l2_sp_globalBufferIndex], v4l2_sp_globalBufferLength);\n\n VIDEOWRAP_YUYV422_to_YUV420P(\n 640, 480, \n input,\n output, \n v4l2_sp_globalBufferLength\n );\n\n memcpy(pict->data[0], output, 640 * 480);\n memcpy(pict->data[1], output_128, 640 * 480 * 0.5);\n memcpy(pict->data[2], output_128, 640 * 480 * 0.5);\n}\n\nstatic int write_video_frame(AVFormatContext *oc, AVStream *st, int64_t frameCount)\n{\n int ret = 0;\n AVCodecContext *c = st->codec;\n \/\/ AVCodecContext *c = avcodec_alloc_context3(st->codecpar);\n\n fill_yuv_image(&dst_picture, frameCount, c->width, c->height);\n\n AVPacket pkt = { 0 };\n int got_packet;\n av_init_packet(&pkt);\n\n \/* encode the image *\/\n frame->pts = frameCount;\n ret = avcodec_encode_video2(c, &pkt, frame, &got_packet);\n\n if (ret < 0) {\n av_log(NULL, AV_LOG_ERROR, "Error encoding video frame.\\n");\n }\n else {\n if (got_packet) {\n pkt.stream_index = st->index;\n pkt.pts = av_rescale_q_rnd(pkt.pts, c->time_base, st->time_base, AVRounding(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));\n ret = av_write_frame(oc, &pkt);\n\n if (ret < 0) {\n av_log(NULL, AV_LOG_ERROR, "Error while writing video frame.\\n");\n }\n }\n }\n\n av_packet_unref(&pkt);\n return ret;\n}\n\nint main(int argc, char* argv[])\n{\n printf("starting...\\n");\n\n pthread_t v4l2_thread;\n pthread_create(&v4l2_thread, NULL, ThreadEntryPoint, NULL);\n pthread_detach(v4l2_thread);\n\n memset(output_128, 128, sizeof(output_128));\n\n const char *url = "rtsp:\/\/192.168.50.84:8554\/stream";\n\n AVFormatContext *outContext;\n AVStream *video_st;\n AVCodec *video_codec;\n int ret = 0;\n int64_t frameCount = 0;\n\n av_log_set_level(AV_LOG_DEBUG);\n\n av_register_all();\n avformat_network_init();\n\n avformat_alloc_output_context2(&outContext, NULL, "rtsp", url);\n\n if (!outContext) {\n av_log(NULL, AV_LOG_FATAL, "Could not allocate an output context for '%s'.\\n", url);\n return 0;\n }\n\n if (!outContext->oformat) {\n av_log(NULL, AV_LOG_FATAL, "Could not create the output format for '%s'.\\n", url);\n return 0;\n }\n\n video_st = add_stream(outContext, &video_codec, VIDEO_CODEC_ID);\n\n \/* Now that all the parameters are set, we can open the video codec and allocate the necessary encode buffers. *\/\n if (video_st) {\n av_log(NULL, AV_LOG_DEBUG, "Video stream codec %s.\\n ", avcodec_get_name(video_st->codec->codec_id));\n\n ret = open_video(outContext, video_codec, video_st);\n if (ret < 0) {\n av_log(NULL, AV_LOG_FATAL, "Open video stream failed.\\n");\n return 0;\n }\n }\n else {\n av_log(NULL, AV_LOG_FATAL, "Add video stream for the codec '%s' failed.\\n", avcodec_get_name(VIDEO_CODEC_ID));\n return 0;\n }\n\n av_dump_format(outContext, 0, url, 1);\n\n ret = avformat_write_header(outContext, NULL);\n if (ret != 0) {\n av_log(NULL, AV_LOG_ERROR, "Failed to connect to RTSP server for '%s'.\\n", url);\n return 0;\n }\n\n while (video_st) {\n frameCount++;\n\n ret = write_video_frame(outContext, video_st, frameCount);\n\n if (ret < 0) {\n av_log(NULL, AV_LOG_ERROR, "Write video frame failed.\\n", url);\n return 0;\n }\n }\n\n avcodec_close(video_st->codec);\n av_free(src_picture.data[0]);\n av_free(dst_picture.data[0]);\n av_frame_free(&frame);\n\n avformat_free_context(outContext);\n\n printf("finished.\\n");\n\n return 0;\n}<\/code><\/pre>\n3.4 .\/src\/v4l2_stream.h<\/h3>\n#include <stdio.h> \n#include <stdlib.h> \n#include <string.h> \n#include <assert.h> \n#include <fcntl.h>\n#include <unistd.h>\n#include <sys\/stat.h>\n#include <sys\/types.h>\n#include <sys\/ioctl.h>\n#include <asm\/types.h>\n#include <sys\/mman.h>\n#include <linux\/videodev2.h>\n#include <errno.h>\n#include <stdint.h>\n#include <stdbool.h>\n\n#ifdef __cplusplus\nextern "C" {\n#endif\n\n#define _Video_Device_SP_ "\/dev\/video9"\n#define _V4L2_SP_PIX_FMT_ V4L2_PIX_FMT_YUYV\n#define _V4L2_SP_BUF_TYPE_ V4L2_BUF_TYPE_VIDEO_CAPTURE\n#define _V4L2_SP_BUF_REQ_COUNT_ 60\n\nextern const int v4l2_sp_capture_width;\nextern const int v4l2_sp_capture_height;\n\n\/\/ device number for v4l2 single-planar\nextern int v4l2_sp_fd;\n\n\/\/ global memory for mmap v4l2 query buffer, 5 block\nextern uint8_t* v4l2_sp_globalBuffer[_V4L2_SP_BUF_REQ_COUNT_];\n\n\/\/ global memory buffer length\nextern int v4l2_sp_globalBufferLength;\n\n\/\/ to specify which memory is currently available\nextern int v4l2_sp_globalBufferIndex;\n\n\/\/ to specify globalBuffer length\nextern int v4l2_sp_globalBufferLength;\n\n\/\/ stop capture or not\nextern bool v4l2_sp_captureLoopFlag;\n\nint V4L2_SP_Streaming();\n\nvoid* ThreadEntryPoint(void* arg);\n\n#ifdef __cplusplus\n}\n#endif<\/code><\/pre>\n