extern const URLProtocol ff_tcp_protocol; extern const URLProtocol ff_tls_protocol; extern const URLProtocol ff_udp_protocol; file协议默认白名单有file/crypto/data,位于libavformat/file.c,定义如下: const URLProtocol ff_file_protocol = { .name = "file", .url_open = file_open, .url_read = ...
URLProtocol是FFMPEG操作文件的结构(包括文件,网络数据流等等),包括open、close、read、write、seek等操作。 在av_register_all()函数中,通过调用REGISTER_PROTOCOL()宏,所有的URLProtocol都保存在以first_protocol为链表头的链表中 URLProtocol结构体的定义为: typedef struct URLProtocol { const char *name;//协议的...
1、解协议(http,rtsp,rtmp,mms) AVIOContext,URLProtocol,URLContext主要存储视音频使用的协议的类型以及状态。URLProtocol存储输入视音频使用的封装格式。每种协议都对应一个URLProtocol结构。(注意:FFMPEG中文件也被当做一种协议“file”) 2、解封装(flv,avi,rmvb,mp4) AVFormatContext主要存储视音频封装格式中包含的...
av_log(NULL, AV_LOG_WARNING,"https protocol not found, recompile with openssl or gnutls enabled.\n"); return AVERROR_PROTOCOL_NOT_FOUND; } 从代码中可以看出,ffurl_alloc()主要调用了2个函数:url_find_protocol()根据文件路径查找合适的URLProtocol,url_alloc_for_protocol()为查找到的URLProtocol创...
示例3: input_avio_open ▲点赞 3▼ staticintinput_avio_open(input_plugin_t*this_gen){avio_input_plugin_t*this= (avio_input_plugin_t*) this_gen;inttoread = MAX_PREVIEW_SIZE;inttrycount =0;if(!this->pb) {/* try to open libavio protocol */if(avio_open2(&this->pb,this->mrl_pr...
avioffmpeg源代码urlcontexturlprotocolffurl FFmpeg源代码简单分析:avio_open2() 本文简单分析FFmpeg中一个常用的函数avio_open2()。该函数用于打开FFmpeg的输入输出文件。avio_open2()的声明位于libavformat\avio.h文件中,如下所示。 [cpp] viewplaincopy 1. /** 2. * Create and initialize a AVIOContext for...
* that were not found. May be NULL. * @return >= 0 in case of success, a negative value corresponding to an * AVERROR code in case of failure */intavio_open2(AVIOContext**s,constchar*url,intflags,constAVIOInterruptCB*int_cb,AVDictionary**options); ...
that were not found. May be NULL. @return >= 0 in case of success, a negative value corresponding to an AVERROR code in case of failure */ int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options);...
AVIOContext中包含有一个URLContext 结构体,而在URLContext 中包含有一个URLProtocol结构体。 源码分析 int avio_open2(AVIOContext **s, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options) { URLContext *h; ...
that were not found. May be NULL. @return >= 0 in case of success, a negative value corresponding to an AVERROR code in case of failure */ int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options);...