ffmpeg的解碼流程-文庫(kù)吧資料
2024-08-24 12:35本頁(yè)面
【正文】 么樣去抓屏功能的實(shí)現(xiàn)，但我們得去看看魔術(shù)師在后臺(tái)的一些手法，而不只是簡(jiǎn)單的享受其表演。av_close_input_file(pFormatCtx)。// Close the video fileav_free(buffer)。// Free the RGB image}av_free_packet(amp。// Free the packet that was allocated by av_read_frame}}frameFinished,while(av_read_frame(pFormatCtx, amp。avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24,// of AVPicture// Note that pFrameRGB is an AVFrame, but AVFrame is a superset// Assign appropriate parts of buffer to image planes in pFrameRGBbuffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t))。return 1。if(pFrameRGB==NULL)pFrame=avcodec_alloc_frame()。// Allocate video framereturn 1。if(avcodec_open(pCodecCtx, pCodec)0)// Open codec} // Codec not foundfprintf(stderr, Unsupported codec!\n)。if(pCodec==NULL) {t find a video streamreturn 1。if(videoStream==1)}videoStream=i。if(pFormatCtxstreams[i]codeccodec_type==CODEC_TYPE_VIDEO) { i++)for(i=0。t find stream informationreturn 1。if(av_find_stream_info(pFormatCtx)0)[3]// Retrieve stream information // Couldn39。if(av_open_input_file(amp。[2]// Open video fileav_register_all()。[1]// Regis
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