用ffmpeg做demux,网上很多参考文章。对于网络流,avformt_find_stream_info()函数默认需要花费较长的时间进行流格式探测,
那么,如何减少探测时间内? 可以通过设置AVFotmatContext的probesize和max_analyze_duration属性进行调节:
............. if (avformat_open_input(&(handle->pFormatContext), "", handle->pInputFormat, NULL) < 0) { av_free(handle->inputBuffer); *errorCode = -4; return FALSE; } (handle->fpState)(handle, 51);
AVDictionary* pOptions = NULL; handle->pFormatContext->probesize = 100 *1024; handle->pFormatContext->max_analyze_duration = 5 * AV_TIME_BASE; if (avformat_find_stream_info(handle->pFormatContext, &pOptions) < 0) { ......... return FALSE; } ...............