该函数主要用于在 FFmpeg 内部创建一个 AVIOContext 结构体,该结构体用于管理读取或写入内存缓冲区的音视频数据,并提供了一些 API 函数用于处理缓冲区数据。一旦创建了 AVIOContext 结构体,就可以通过调用 avio_open2() 函数来打开对应的输入或输出资源,然后即可开始读写数据。 在使用完毕后,需要通过调用 avio_contex...
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FFMPEG内存操作（⼀）avio_reading.c回调读取数据到内存解 析 相关博客列表：在FFMPEG的官⽅例程中，有个avio_reading.c 的⽂件，他的主要功能是将⾳视频⽂件读取到内存，如果FFMPEG需要使⽤输⼊⽂件的数据，则直接从内存中调⽤。初学FFMPEG，给avio_reading.c ⽂件做了⼀个注释，如果不对，...
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内存输入(Memory Input)是指将数据从内存中读取到缓冲区中,常见的应用场景包括:从内存中读取音视频数据进行解码或处理。在使用avio实现内存输入时,需要首先创建一个AVIOContext结构体,并将内存数据缓冲区作为参数传递给avio_open函数进行初始化。之后,可以使用avio_read函数从缓冲区中读取数据,直至读取完成。
up->url_write) { av_log(NULL, AV_LOG_ERROR, "Impossible to open the '%s' protocol for writing\n", up->name); return AVERROR(EIO); } uc = av_mallocz(sizeof(URLContext) + strlen(filename) + 1); if (!uc) { err = AVERROR(ENOMEM); goto fail; } uc->av_class = &ffurl...
uc->prot->url_open2(uc, uc->filename, uc->flags, options) : uc->prot->url_open(uc, uc->filename, uc->flags); if (err) return err; uc->is_connected = 1; //We must be careful here as ffurl_seek() could be slow, for example for http if( (uc->flags & AVIO_FLAG_...
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uc->prot->url_open2(uc, uc->filename, uc->flags, options) : uc->prot->url_open(uc, uc->filename, uc->flags); if (err) return err; uc->is_connected = 1; //We must be careful here as ffurl_seek() could be slow, for example for http if( (uc->flags & AVIO_FLAG_...
strcmp(proto_nested, up->name)) return url_alloc_for_protocol(puc, up, filename, flags, int_cb); } *puc = NULL; return AVERROR_PROTOCOL_NOT_FOUND; } int ffurl_open(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options...