当前位置： 首页 > news >正文

FFmpeg 4.3 音视频-多路H265监控录放C++开发十五，解码相关，将h264文件进行帧分隔变成avpacket

news 2026/2/7 16:36:25

前提

前面我们学习了 将YUV数据读取到AVFrame，然后将AVFrame通过 h264编码器变成 AVPacket后，然后将avpacket直接存储到了本地就变成了h264文件。

这一节课，学习解码的一部分。我们需要将 本地存储的h264文件进行帧分隔，也就是变成avpacket，前面直接将avpacket存储就能变成h264文件，那么为什么h264文件需要进行帧分隔才能变成avpacket 呢？

这其实很容易理解，我在编码的时候，由于h264编码器在将avframe变成avpacket的时候就是按照h264的格式进行编码的，因此存储下来的就是一个一个的h264格式的编码结构(也就是NALU结构)，因此一个avpacket就是一个NALU或者多个NALU，那么直接存储成h264文件，是OK的。

那么如果是我们本地的h264文件要转化成avpacket，我们需要通过 读取文件的形式 将 h264中的一段数据先读取到内存，然后将这段内存转化成avpacket。

问题

读取多少内存才刚好是一个avpacket呢？

如果不是h264，而是h265文件呢？

实际上这个avpacket的大小是不好定义的，更加明确的说明应该是 avpacket中的data 和size 到底是多大，是不好定义的。

ffmpeg 的解决方案:

ffmpeg指定一块内存，比如4096个字节。

每次从h264文件中都读取4096个字节。

然后通过 解析器 来解析这段内存，假设第一个avpacket大小为10000，不够一个avpacket，这时候怎么办呢？实际上 解析器内部是有缓存的，不够10000个字节，就不生成avpacket，还是会读取10000个字节到 解析器内部的缓存。

然后循环再去读 h264文件的下一个4096字节，直到够了10000个字节，就会生成一个avpacket。

假设中间的第一个avpacket大小为100，那么4096个字节中可能有多个avpacket，因此在读取4096字节后，解析器会找到该4096中的第一个avpacket，还需要有一个循环，该循环就是从剩下的3996个字节，在解析

循环的时候，会减去一个avpacket的大小，然后将指针指向减去avpacket大小的位置，再去解析 剩下来的 内存。

代码 mian.cpp

#include <iostream>
#include <fstream>
using namespace std;
extern "C" {#include "libavcodec/avcodec.h"
}char* const h264filename = (char* const)"1920_1080_25.h264";//我们的目的是从 h264文件中 截取avpacket，，也就是对h264进行帧分隔
int main(int argc, const char *argv[]) {ifstream ifs = ifstream(h264filename,ios_base::binary);cout << "main start" << endl;//找到解码器AVCodec* avcodec = avcodec_find_decoder(AV_CODEC_ID_H264);//找到解码器上下文AVCodecContext* avcodecContext = avcodec_alloc_context3(avcodec);//找到解析器上下文AVCodecParserContext*  avcodecParserContext = av_parser_init(AV_CODEC_ID_H264);//打开解码器上下文avcodec_open2(avcodecContext, NULL, NULL);//这里要加一个 AV_INPUT_BUFFER_PADDING_SIZE，是为了某些解码器的buf fix，是ffmepg的要求，但是不会给 AV_INPUT_BUFFER_PADDING_SIZE 中写入数据unsigned char buf[4096+ AV_INPUT_BUFFER_PADDING_SIZE] = { 0 };AVPacket *avpacket = av_packet_alloc();while (!ifs.eof()) {ifs.read((char *)buf, 4096);//打算每次从h264文件中读取4096个字节int realbufreadcount = ifs.gcount(); // 真正读取的字节数if (realbufreadcount<=0) { //如果读取的数据是<=0的，说明整个h264文件已经读取完成了，或者读取h264文件的时候出现了错误了，那么就要直接退出cout << "已经读取到h264文件的最后" << endl;break;}//需要对真正读取的字节数进行解析，有可能这4096个字节中有多个avpacket，//因此要有一个判断决定是否解析完毕了这4096个字节.//这个判断条件就是 读取到的字节数的复制体。int parsebufcount = realbufreadcount;int parseret = 0;auto tempbuf = buf;//让 tempbuf 指向 buf的指针。这里为什么不直接用buf呢？从功能实现上直接用buf也是可以的，但是这是C语言的基本功，尽量不要用原始指针。而是找一个复制的指针。while (parsebufcount > 0 ) {///av_parser_parse2方法解析了多少个字节，从那个指针开始解析（第五个参数），解析多少个字节（第六个参数）parseret = av_parser_parse2(avcodecParserContext,avcodecContext,&avpacket->data,&avpacket->size,tempbuf,parsebufcount,AV_NOPTS_VALUE,AV_NOPTS_VALUE,0);cout << "realbufreadcount = " << realbufreadcount << "  parseret = " << parseret << " avpacket->size = " << avpacket->size << endl;parsebufcount = parsebufcount - parseret; //将解析过的字节减去tempbuf = tempbuf - parseret;//将指针指向还没有解析过的字节的最开始//如果packet的size是大于0的，说明是正常截取了一段avpacket数据if (avpacket->size >0 ) {//如果avpacket 的size 大于0，说明已经有了avpacket了，也就是说，到这里，已经对h264进行了分离，得到了avpacket// 那么下来，我们就需要将 对avpacket进行处理， todo//avpacket数据变成avframe}}}if (ifs) {ifs.close();}if (avpacket!=nullptr) {av_packet_free(&avpacket);}if (avcodecParserContext != nullptr) {av_parser_close(avcodecParserContext);}if (avcodecContext != nullptr) {avcodec_free_context(&avcodecContext);}
}

运行结果：

main start
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1393 avpacket->size = 30065
realbufreadcount = 4096  parseret = 2703 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 297 avpacket->size = 3000
realbufreadcount = 4096  parseret = 594 avpacket->size = 594
realbufreadcount = 4096  parseret = 1188 avpacket->size = 1188
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 528 avpacket->size = 528
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 1056 avpacket->size = 1056
realbufreadcount = 4096  parseret = 433 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1612 avpacket->size = 18429
realbufreadcount = 4096  parseret = 2484 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 956 avpacket->size = 3440
realbufreadcount = 4096  parseret = 1912 avpacket->size = 1912
realbufreadcount = 4096  parseret = 1228 avpacket->size = 0
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 255 avpacket->size = 1483
realbufreadcount = 4096  parseret = 752 avpacket->size = 752
realbufreadcount = 4096  parseret = 1504 avpacket->size = 1504
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 960 avpacket->size = 960
realbufreadcount = 4096  parseret = 625 avpacket->size = 0
realbufreadcount = 4096  parseret = 1393 avpacket->size = 2018
realbufreadcount = 4096  parseret = 2703 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 3390 avpacket->size = 6093
realbufreadcount = 4096  parseret = 706 avpacket->size = 0
realbufreadcount = 4096  parseret = 3097 avpacket->size = 3803
realbufreadcount = 4096  parseret = 999 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 3993 avpacket->size = 13184
realbufreadcount = 4096  parseret = 103 avpacket->size = 0
realbufreadcount = 4096  parseret = 2962 avpacket->size = 3065
realbufreadcount = 4096  parseret = 1134 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1960 avpacket->size = 7190
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 409 avpacket->size = 409
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 818 avpacket->size = 818
realbufreadcount = 4096  parseret = 909 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 2940 avpacket->size = 12041
realbufreadcount = 4096  parseret = 1156 avpacket->size = 0
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 487 avpacket->size = 1643
realbufreadcount = 4096  parseret = 3609 avpacket->size = 0
realbufreadcount = 4096  parseret = 2448 avpacket->size = 6057
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 897 avpacket->size = 897
realbufreadcount = 4096  parseret = 751 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 460 avpacket->size = 5307
realbufreadcount = 4096  parseret = 920 avpacket->size = 920
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 1840 avpacket->size = 1840
realbufreadcount = 4096  parseret = 876 avpacket->size = 0
realbufreadcount = 4096  parseret = 2296 avpacket->size = 3172
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 745 avpacket->size = 745
realbufreadcount = 4096  parseret = 1055 avpacket->size = 0
realbufreadcount = 4096  parseret = 3746 avpacket->size = 4801
realbufreadcount = 4096  parseret = 350 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 2298 avpacket->size = 6744
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 747 avpacket->size = 747
realbufreadcount = 4096  parseret = 1051 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 380 avpacket->size = 9623
realbufreadcount = 4096  parseret = 1053 avpacket->size = 1053
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2106 avpacket->size = 2106
realbufreadcount = 4096  parseret = 557 avpacket->size = 0
realbufreadcount = 4096  parseret = 2197 avpacket->size = 2754
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 646 avpacket->size = 646
realbufreadcount = 4096  parseret = 1253 avpacket->size = 0
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 3277 avpacket->size = 4530
realbufreadcount = 4096  parseret = 819 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 2107 avpacket->size = 7022
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 556 avpacket->size = 556
[h264 @ 017D6740] non-existing PPS 1 referenced
realbufreadcount = 4096  parseret = 1112 avpacket->size = 1112
realbufreadcount = 4096  parseret = 321 avpacket->size = 0
[h264 @ 017D6740] non-existing PPS 127 referenced
realbufreadcount = 4096  parseret = 283 avpacket->size = 604
realbufreadcount = 4096  parseret = 3813 avpacket->size = 0
realbufreadcount = 4096  parseret = 2298 avpacket->size = 6111
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 747 avpacket->size = 747
realbufreadcount = 4096  parseret = 1051 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 337 avpacket->size = 5484
realbufreadcount = 4096  parseret = 967 avpacket->size = 967
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 1934 avpacket->size = 1934
realbufreadcount = 4096  parseret = 858 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 3922 avpacket->size = 8876
realbufreadcount = 4096  parseret = 150 avpacket->size = 150
realbufreadcount = 4096  parseret = 24 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1655 avpacket->size = 5775
realbufreadcount = 4096  parseret = 2441 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 1471 avpacket->size = 3912
realbufreadcount = 4096  parseret = 2625 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 3177 avpacket->size = 5802
realbufreadcount = 4096  parseret = 919 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 436 avpacket->size = 5451
realbufreadcount = 4096  parseret = 872 avpacket->size = 872
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 1744 avpacket->size = 1744
realbufreadcount = 4096  parseret = 1044 avpacket->size = 0
realbufreadcount = 4096  parseret = 2981 avpacket->size = 4025
realbufreadcount = 4096  parseret = 1115 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 3134 avpacket->size = 8345
realbufreadcount = 4096  parseret = 962 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1134 avpacket->size = 6192
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2268 avpacket->size = 2268
realbufreadcount = 4096  parseret = 694 avpacket->size = 0
realbufreadcount = 4096  parseret = 2872 avpacket->size = 3566
realbufreadcount = 4096  parseret = 1224 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 766 avpacket->size = 6086
realbufreadcount = 4096  parseret = 1852 avpacket->size = 1852
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 1067 avpacket->size = 1067
realbufreadcount = 4096  parseret = 411 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 2142 avpacket->size = 6649
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 591 avpacket->size = 591
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 1182 avpacket->size = 1182
realbufreadcount = 4096  parseret = 143 avpacket->size = 143
realbufreadcount = 4096  parseret = 38 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 16 avpacket->size = 4150
realbufreadcount = 4096  parseret = 329 avpacket->size = 329
realbufreadcount = 4096  parseret = 658 avpacket->size = 658
realbufreadcount = 4096  parseret = 1316 avpacket->size = 1316
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 768 avpacket->size = 768
realbufreadcount = 4096  parseret = 1009 avpacket->size = 0
realbufreadcount = 4096  parseret = 1189 avpacket->size = 2198
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2378 avpacket->size = 2378
realbufreadcount = 4096  parseret = 529 avpacket->size = 0
realbufreadcount = 4096  parseret = 3621 avpacket->size = 4150
realbufreadcount = 4096  parseret = 475 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 3932 avpacket->size = 8503
realbufreadcount = 4096  parseret = 164 avpacket->size = 0
realbufreadcount = 4096  parseret = 0 avpacket->size = 160
[h264 @ 017D6740] non-existing PPS 2 referenced
realbufreadcount = 4096  parseret = 109 avpacket->size = 113
realbufreadcount = 4096  parseret = 511 avpacket->size = 511
realbufreadcount = 4096  parseret = 1022 avpacket->size = 1022
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2044 avpacket->size = 2044
realbufreadcount = 4096  parseret = 410 avpacket->size = 0
realbufreadcount = 4096  parseret = 1913 avpacket->size = 2323
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 362 avpacket->size = 362
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 724 avpacket->size = 724
realbufreadcount = 4096  parseret = 1097 avpacket->size = 0
realbufreadcount = 4096  parseret = 3498 avpacket->size = 4595
realbufreadcount = 4096  parseret = 598 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1626 avpacket->size = 6320
realbufreadcount = 4096  parseret = 2470 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2310 avpacket->size = 8876
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 759 avpacket->size = 759
realbufreadcount = 4096  parseret = 1027 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 981 avpacket->size = 10200
realbufreadcount = 4096  parseret = 2326 avpacket->size = 2326
realbufreadcount = 4096  parseret = 789 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1160 avpacket->size = 6045
realbufreadcount = 4096  parseret = 2936 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 1034 avpacket->size = 8066
realbufreadcount = 4096  parseret = 3062 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2286 avpacket->size = 5348
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 735 avpacket->size = 735
realbufreadcount = 4096  parseret = 1075 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 462 avpacket->size = 5633
realbufreadcount = 4096  parseret = 924 avpacket->size = 924
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 1848 avpacket->size = 1848
realbufreadcount = 4096  parseret = 862 avpacket->size = 0
realbufreadcount = 4096  parseret = 2596 avpacket->size = 3458
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 1045 avpacket->size = 1045
realbufreadcount = 4096  parseret = 455 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 620 avpacket->size = 5171
realbufreadcount = 4096  parseret = 1240 avpacket->size = 1240
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 309 avpacket->size = 309
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 618 avpacket->size = 618
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 1236 avpacket->size = 1236
realbufreadcount = 4096  parseret = 73 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 3233 avpacket->size = 7402
realbufreadcount = 4096  parseret = 863 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 967 avpacket->size = 10022
realbufreadcount = 4096  parseret = 3129 avpacket->size = 0
realbufreadcount = 4096  parseret = 1010 avpacket->size = 4139
realbufreadcount = 4096  parseret = 2306 avpacket->size = 2306
realbufreadcount = 4096  parseret = 780 avpacket->size = 0
realbufreadcount = 4096  parseret = 3158 avpacket->size = 3938
realbufreadcount = 4096  parseret = 938 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 3040 avpacket->size = 12170
realbufreadcount = 4096  parseret = 1056 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 2174 avpacket->size = 11422
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 623 avpacket->size = 623
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 1246 avpacket->size = 1246
realbufreadcount = 4096  parseret = 53 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 2431 avpacket->size = 6580
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 880 avpacket->size = 880
realbufreadcount = 4096  parseret = 785 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1181 avpacket->size = 10158
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2362 avpacket->size = 2362
realbufreadcount = 4096  parseret = 553 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 324 avpacket->size = 13165
realbufreadcount = 4096  parseret = 3772 avpacket->size = 0
realbufreadcount = 4096  parseret = 1810 avpacket->size = 5582
realbufreadcount = 4096  parseret = 2286 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 3615 avpacket->size = 9997
realbufreadcount = 4096  parseret = 481 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1004 avpacket->size = 9677
realbufreadcount = 4096  parseret = 2388 avpacket->size = 2388
realbufreadcount = 4096  parseret = 704 avpacket->size = 0
realbufreadcount = 4096  parseret = 3793 avpacket->size = 4497
realbufreadcount = 4096  parseret = 303 avpacket->size = 0
[h264 @ 017D6740] non-existing PPS 127 referenced
realbufreadcount = 4096  parseret = 245 avpacket->size = 548
realbufreadcount = 4096  parseret = 737 avpacket->size = 737
realbufreadcount = 4096  parseret = 1474 avpacket->size = 1474
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 905 avpacket->size = 905
realbufreadcount = 4096  parseret = 735 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 1293 avpacket->size = 10220
realbufreadcount = 4096  parseret = 2803 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 644 avpacket->size = 3447
realbufreadcount = 4096  parseret = 1696 avpacket->size = 1696
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 789 avpacket->size = 789
realbufreadcount = 4096  parseret = 967 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 489 avpacket->size = 9648
realbufreadcount = 4096  parseret = 1332 avpacket->size = 1332
realbufreadcount = 4096  parseret = 2275 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2952 avpacket->size = 9323
realbufreadcount = 4096  parseret = 1144 avpacket->size = 0
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 2549 avpacket->size = 3693
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 998 avpacket->size = 998
realbufreadcount = 4096  parseret = 549 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 2765 avpacket->size = 7410
[h264 @ 017D6740] non-existing PPS 6 referenced
realbufreadcount = 4096  parseret = 1214 avpacket->size = 1214
realbufreadcount = 4096  parseret = 117 avpacket->size = 0
realbufreadcount = 4096  parseret = 4096 avpacket->size = 0
realbufreadcount = 4096  parseret = 131 avpacket->size = 4344
realbufreadcount = 4096  parseret = 515 avpacket->size = 515
realbufreadcount = 4096  parseret = 1030 avpacket->size = 1030
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2060 avpacket->size = 2060
realbufreadcount = 4096  parseret = 360 avpacket->size = 0
realbufreadcount = 4096  parseret = 1041 avpacket->size = 1401
[h264 @ 017D6740] FMO is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
realbufreadcount = 4096  parseret = 2082 avpacket->size = 2082
realbufreadcount = 4096  parseret = 973 avpacket->size = 0
realbufreadcount = 1335  parseret = 1335 avpacket->size = 0

注意的点：

在看 ffmpeg的例子的时候，发现 视频从 h264分帧成为avpacket的代码

和 将 aac 分帧成为 avframe的代码会有不同。

这里要注意。这个区别，在于 在aac分帧的时候，当读取aac文件小于某一个数值的时候，会给内存中不停的加数据，实际上测试对于aac数据 按照视频的写法也是可以的。之所以这么写，是对于其他格式的会有问题，aac实际上没有问题。

相关文章：

FFmpeg 4.3 音视频-多路H265监控录放C++开发十五，解码相关，将h264文件进行帧分隔变成avpacket

前提 前面我们学习了 将YUV数据读取到AVFrame&#xff0c;然后将AVFrame通过 h264编码器变成 AVPacket后&#xff0c;然后将avpacket直接存储到了本地就变成了h264文件。 这一节课&#xff0c;学习解码的一部分。我们需要将 本地存储的h264文件进行帧分隔&#xff0c;也就是变…...

编程日记 2024/11/20 11:45:51

力扣 LeetCode 104. 二叉树的最大深度（Day7：二叉树）

解题思路&#xff1a; 采用后序遍历 首先要区别好什么是高度&#xff0c;什么是深度 最大深度实际上就是根节点的高度 高度的求法是从下往上传&#xff0c;从下往上传实际上就是左右中&#xff08;后序遍历&#xff09; 深度的求法是从上往下去寻找 所以采用从下往上 本…...

编程日记 2024/11/20 11:44:48

如何高效实现汤臣倍健营销云数据集成到SQLServer

新版订单同步-&#xff08;Life-Space&#xff09;江油泰熙&#xff1a;汤臣倍健营销云数据集成到SQL Server 在企业信息化建设中&#xff0c;数据的高效集成和管理是提升业务运营效率的关键。本文将分享一个实际案例——如何通过新版订单同步方案&#xff0c;将汤臣倍健营销云…...

编程日记 2024/11/20 11:43:47

Vue3中使用:deep修改element-plus的样式无效怎么办？

前言&#xff1a;当我们用 vue3 :deep() 处理 elementui 中 el-dialog_body和el-dislog__header 的时候样式一直无法生效&#xff0c;遇到这种情况怎么办&#xff1f; 解决办法&#xff1a; 1.直接在 dialog 上面增加class 我试过&#xff0c;也不起作用&#xff0c;最后用这种…...

编程日记 2024/11/20 11:41:45

具身智能之Isaac Gym使用

0. 简介 Isaac Gym 是由 NVIDIA 提供的一个高性能仿真平台&#xff0c;专门用于大规模的机器人学习和强化学习&#xff08;RL&#xff09;任务。它结合了物理仿真、GPU加速、深度学习框架互操作性等特点&#xff0c;使得研究人员和开发者可以快速进行复杂的机器人仿真和训练。…...

编程日记 2024/11/20 11:40:43

【大数据学习 | Spark】spark-shell开发

spark的代码分为两种 本地代码在driver端直接解析执行没有后续 集群代码&#xff0c;会在driver端进行解析&#xff0c;然后让多个机器进行集群形式的执行计算 spark-shell --master spark://nn1:7077 --executor-cores 2 --executor-memory 2G sc.textFile("/home/ha…...

编程日记 2024/11/20 11:38:40

《Python制作动态爱心粒子特效》

一、实现思路 粒子效果&#xff1a; – 使用Pygame模拟粒子运动&#xff0c;粒子会以爱心的轨迹分布并运动。爱心公式&#xff1a; 爱心的数学公式&#xff1a; x16sin 3 (t),y13cos(t)−5cos(2t)−2cos(3t)−cos(4t) 参数 t t 的范围决定爱心形状。 动态效果&#xff1a; 粒子…...

编程日记 2024/11/20 11:37:36

Jmeter 如何导入证书并调用https请求

Jmeter 如何导入证书并调用https请求 通过SSL管理器添加证书文件 支持添加的文件为.p12&#xff0c;.pfx&#xff0c;.jks 如何将pem文件转换为pfx文件&#xff1f; 在公司内部通常会提供3个pem文件。 ca.pem&#xff1a;可以理解为是根证书&#xff0c;用于验证颁发的证…...

编程日记 2024/11/20 11:30:29

Python程序15个提速优化方法

目录 Python程序15个提速优化方法1. 引言2. 方法一&#xff1a;使用内建函数代码示例&#xff1a;解释&#xff1a; 3. 方法二&#xff1a;避免使用全局变量代码示例&#xff1a;解释&#xff1a; 4. 方法三&#xff1a;使用局部变量代码示例&#xff1a;解释&#xff1a; 5. 方…...

编程日记 2024/11/20 11:29:28

足球虚拟越位线技术FIFA OT（二）

足球虚拟越位线技术FIFA OT&#xff08;二&#xff09; 在FIFA认证测试过程中&#xff0c;留给VAR系统绘制越位线的时间只有90秒&#xff08;在比赛中时间可能更短&#xff09;&#xff0c;那么90秒内要做什么事呢&#xff0c;首先场地上球员做出踢球动作&#xff0c;然后VAR要…...

编程日记 2024/11/20 11:28:24

centos7.9单机版安装K8s

1.安装docker [rootlocalhost ~]# hostnamectl set-hostname master [rootlocalhost ~]# bash [rootmaster ~]# mv /etc/yum.repos.d/* /home [rootmaster ~]# curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo [rootmaster ~]# cu…...

编程日记 2024/11/20 11:27:20

图像编辑一些概念:Image Reconstruction与Image Re-generation

图像编辑本质上是在“图像重建”&#xff08;image reconstruction&#xff09;和“图像再生成”&#xff08;image re-generation&#xff09;之间寻找平衡。 1. Image Reconstruction&#xff08;图像重建&#xff09; 定义&#xff1a;图像重建通常是指从已有的图像中提取信…...

编程日记 2024/11/20 11:24:16

【STM32】在 STM32 USB 设备库添加新的设备类

说实话&#xff0c;我非常想吐槽 STM32 的 USB device library&#xff0c;总感觉很混乱。 USB Device library architecture 根据架构图&#xff1a; Adding a custom class 如果你想添加新的设备类&#xff0c;必须修改的文件有 usbd_desc.cusbd_conf.cusb_device.c 需要…...

编程日记 2024/11/20 11:23:15

【Redis】Redis实现的消息队列

一、用list实现【这是数据类型所以支持持久化】 消息基于redis存储不会因为受jvm内存上限的限制&#xff0c;支持消息的有序性&#xff0c;基于redis的持久化机制&#xff0c;只支持单一消费者订阅&#xff0c;无法避免消息丢失。 二、用PubSub【这不是数据类型&#xff0c;是…...

编程日记 2024/11/20 11:22:12

# Spring事务

Spring事务 什么是spring的事务&#xff1f; 在Spring框架中&#xff0c;事务管理是一种控制数据库操作执行边界的技术&#xff0c;确保一系列操作要么全部成功&#xff0c;要么全部失败&#xff0c;从而维护数据的一致性和完整性。Spring的事务管理主要关注以下几点&#xf…...

编程日记 2024/11/20 11:21:08

Java学习笔记--数组常见算法：数组翻转，冒泡排序，二分查找

一&#xff0c;数组翻转 1.概述:数组对称索引位置上的元素互换&#xff0c;最大值数组序号是数组长度减一 创建跳板temp&#xff0c;进行min和max的互换&#xff0c;然后min自增&#xff0c;max自减&#xff0c;当min>max的时候停止互换&#xff0c;代表到中间值 用代码实…...

编程日记 2024/11/20 11:17:04

ARM 架构（Advanced RISC Machine）精简指令集计算机（Reduced Instruction Set Computer）

文章目录 1、ARM 架构ARM 架构的特点ARM 架构的应用ARM 架构的未来发展 2、RISCRISC 的基本概念RISC 的优势RISC 的应用RISC 与 CISC 的对比总结 1、ARM 架构 ARM 架构是一种低功耗、高性能的处理器架构&#xff0c;广泛应用于移动设备、嵌入式系统以及越来越多的服务器和桌面…...

编程日记 2024/11/20 11:15:01

7.STM32之通信接口《精讲》之USART通信---多字节数据收发（数据包的模式：HEX数据包和文本数据包）

根据上一节的HEX数据包的设计完成&#xff0c;本节将完成文本数据包的编写&#xff0c;&#xff08;HEX数据包其实本质就是原始数据&#xff0c;文本数据包我么要接收到还要对照ASCll进行解析封装&#xff09; 有不懂的可参考上一节的讲解&#xff01;&#xff01;&#xff…...

编程日记 2024/11/20 11:07:53

基于Vue+SpringBoot的求职招聘平台

平台概述 本平台是一个高效、便捷的人才与职位匹配系统&#xff0c;旨在为求职者与招聘者提供一站式服务。平台内设三大核心角色&#xff1a;求职者、招聘者以及超级管理员&#xff0c;每个角色拥有独特的功能模块&#xff0c;确保用户能够轻松完成从信息获取到最终录用的整个…...

编程日记 2024/11/20 11:05:50

WebRTC 和 WebSocket

WebRTC 和 WebSocket 是两种不同的技术&#xff0c;虽然它们都用于在浏览器之间进行通信&#xff0c;但它们的设计目标和使用场景有所不同。以下是它们之间的主要区别&#xff1a; 目的和使用场景 WebRTC: 主要用于实现实时音视频通信。 支持点对点&#xff08;P2P&#xff09…...

编程日记 2024/11/20 11:03:48

浏览器访问 AWS ECS 上部署的 Docker 容器（监听 80 端口）

✅ 一、ECS 服务配置 Dockerfile 确保监听 80 端口 EXPOSE 80 CMD ["nginx", "-g", "daemon off;"]或 EXPOSE 80 CMD ["python3", "-m", "http.server", "80"]任务定义&#xff08;Task Definition&…...

编程新知 2026/2/7 13:37:25

利用最小二乘法找圆心和半径

#include <iostream> #include <vector> #include <cmath> #include <Eigen/Dense> // 需安装Eigen库用于矩阵运算 // 定义点结构 struct Point { double x, y; Point(double x_, double y_) : x(x_), y(y_) {} }; // 最小二乘法求圆心和半径 …...

编程新知 2026/2/1 6:20:07

C++初阶-list的底层

目录 1.std::list实现的所有代码 2.list的简单介绍 2.1实现list的类 2.2_list_iterator的实现 2.2.1_list_iterator实现的原因和好处 2.2.2_list_iterator实现 2.3_list_node的实现 2.3.1. 避免递归的模板依赖 2.3.2. 内存布局一致性 2.3.3. 类型安全的替代方案 2.3.…...

编程新知 2026/2/4 17:44:58

应用升级/灾备测试时使用guarantee 闪回点迅速回退

1.场景 应用要升级,当升级失败时,数据库回退到升级前. 要测试系统,测试完成后,数据库要回退到测试前。 相对于RMAN恢复需要很长时间&#xff0c; 数据库闪回只需要几分钟。 2.技术实现 数据库设置 2个db_recovery参数 创建guarantee闪回点&#xff0c;不需要开启数据库闪回。…...

编程新知 2026/1/14 22:12:47

【Redis技术进阶之路】「原理分析系列开篇」分析客户端和服务端网络诵信交互实现（服务端执行命令请求的过程 - 初始化服务器）

服务端执行命令请求的过程 【专栏简介】【技术大纲】【专栏目标】【目标人群】1. Redis爱好者与社区成员2. 后端开发和系统架构师3. 计算机专业的本科生及研究生 初始化服务器1. 初始化服务器状态结构初始化RedisServer变量 2. 加载相关系统配置和用户配置参数定制化配置参数案…...

编程新知 2026/2/2 0:45:02

【ROS】Nav2源码之nav2_behavior_tree-行为树节点列表

1、行为树节点分类 在 Nav2（Navigation2）的行为树框架中，行为树节点插件按照功能分为 Action（动作节点）、Condition（条件节点）、Control（控制节点） 和 Decorator（装饰节点） 四类。 1.1 动作节点 Action 执行具体的机器人操作或任务，直接与硬件、传感器或外部系统…...

编程新知 2026/2/7 8:45:41

论文浅尝 | 基于判别指令微调生成式大语言模型的知识图谱补全方法（ISWC2024）

笔记整理&#xff1a;刘治强&#xff0c;浙江大学硕士生&#xff0c;研究方向为知识图谱表示学习&#xff0c;大语言模型 论文链接&#xff1a;http://arxiv.org/abs/2407.16127 发表会议&#xff1a;ISWC 2024 1. 动机 传统的知识图谱补全&#xff08;KGC&#xff09;模型通过…...

编程新知 2026/1/31 12:03:23

鱼香ros docker配置镜像报错：https://registry-1.docker.io/v2/

使用鱼香ros一件安装docker时的https://registry-1.docker.io/v2/问题 一键安装指令 wget http://fishros.com/install -O fishros && . fishros出现问题&#xff1a;docker pull 失败 网络不同&#xff0c;需要使用镜像源 按照如下步骤操作 sudo vi /etc/docker/dae…...

编程新知 2025/12/31 6:28:08

laravel8+vue3.0+element-plus搭建方法

创建 laravel8 项目 composer create-project --prefer-dist laravel/laravel laravel8 8.* 安装 laravel/ui composer require laravel/ui 修改 package.json 文件 "devDependencies": {"vue/compiler-sfc": "^3.0.7","axios": …...

编程新知 2025/10/15 0:25:46

HarmonyOS运动开发：如何用mpchart绘制运动配速图表

##鸿蒙核心技术##运动开发##Sensor Service Kit&#xff08;传感器服务&#xff09;# 前言 在运动类应用中&#xff0c;运动数据的可视化是提升用户体验的重要环节。通过直观的图表展示运动过程中的关键数据&#xff0c;如配速、距离、卡路里消耗等&#xff0c;用户可以更清晰…...

编程新知 2026/2/2 7:49:59