ffmpeg框架中如何從avframe中獲取yuv數據用於測試

avcodec_decode_video2(pstream_info->dec_ctx, pDecodeFrame, &frameFinished,&pkt);
if(frameFinished)
{
if (pstream_info->dec_ctx->pix_fmt == AV_PIX_FMT_YUV420P) //如果是yuv420p的
{
for(i = 0 ; i < pstream_info->dec_ctx->height ; i++)
{
memcpy(video_decode_buf+pstream_info->dec_ctx->widthi,
pDecodeFrame->data[0]+pDecodeFrame->linesize[0]i,
pstream_info->dec_ctx->width);
}
for(j = 0 ; j < pstream_info->dec_ctx->height/2 ; j++)
{
memcpy(video_decode_buf+pstream_info->dec_ctx->widthi+pstream_info->dec_ctx->width/2j,
pDecodeFrame->data[1]+pDecodeFrame->linesize[1]j,
pstream_info->dec_ctx->width/2);
}
for(k =0 ; k < pstream_info->dec_ctx->height/2 ; k++)
{
memcpy(video_decode_buf+pstream_info->dec_ctx->widthi+pstream_info->dec_ctx->width/2j+pstream_info->dec_ctx->width/2k,
pDecodeFrame->data[2]+pDecodeFrame->linesize[2]k,
pstream_info->dec_ctx->width/2);
}
}
else if (pstream_info->dec_ctx->pix_fmt == AV_PIX_FMT_YUV422P)//如果是yuv422p的
{
for(i = 0 ; i < pstream_info->dec_ctx->height ; i++)
{
memcpy(video_decode_buf+pstream_info->dec_ctx->widthi,
pDecodeFrame->data[0]+pDecodeFrame->linesize[0]i,
pstream_info->dec_ctx->width);
}
for(j = 0 ; j < pstream_info->dec_ctx->height ; j++)
{
memcpy(video_decode_buf+pstream_info->dec_ctx->widthi+pstream_info->dec_ctx->width/2j,
pDecodeFrame->data[1]+pDecodeFrame->linesize[1]j,
pstream_info->dec_ctx->width/2);
}
for(k =0 ; k < pstream_info->dec_ctx->height ; k++)
{
memcpy(video_decode_buf+pstream_info->dec_ctx->widthi+pstream_info->dec_ctx->width/2j+pstream_info->dec_ctx->width/2*k,
pDecodeFrame->data[2]+pDecodeFrame->linesize[2]*k,
pstream_info->dec_ctx->width/2);
}
}
else
{
//可擴展
}
video_decode_size = avpicture_get_size(pstream_info->dec_ctx->pix_fmt, pstream_info->dec_ctx->width,pstream_info->dec_ctx->height);
new_videosize = video_decode_size;

		//縮放或格式轉換
		if (pstream_info->dec_ctx->width != Zoom_Width || 
			pstream_info->dec_ctx->height !=  Zoom_Height ||
			pstream_info->dec_ctx->pix_fmt != Zoom_pix_fmt)
		{
			    new_videosize = VideoScaleYuvZoom(Is_flip,pstream_info->dec_ctx->width ,pstream_info->dec_ctx->height,(int)pstream_info->dec_ctx->pix_fmt,
				Zoom_Width,Zoom_Height,Zoom_pix_fmt,video_decode_buf);
		}
		//這裏可以取出數據
		frame_info->stream_idx = pstream_info->stream_idx;
		//frame_info->pts = pDecodeFrame->pkt_pts * 1000 * av_q2d(pstream_info->stream->time_base);  //轉化成毫秒
		frame_info->pts = pDecodeFrame->pkt_pts ;
		frame_info->timebase_den = pstream_info->stream->time_base.den;  
		frame_info->timebase_num = pstream_info->stream->time_base.num; 
		frame_info->bufsize = new_videosize;
		memcpy(frame_info->buf,video_decode_buf,new_videosize);
	}

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版權聲明：本文爲CSDN博主「朱韋剛」的原創文章，遵循 CC 4.0 BY-SA 版權協議，轉載請附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/zhuweigangzwg/article/details/43734169