ffmpeg:从解码的帧(AVFrame)中创建一个副本 [英] ffmpeg: make a copy from a decoded frame (AVFrame)
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问题描述
我想从一个特殊框架制作一个备份框架(AVFrame)(让我们来说说 pic )。所以,我写了
I want to make a backup frame (AVFrame) from a special frame(let's say pic). So, I have written
AVFrame* bkf = avcodec_alloc_frame();
memcpy(bkf,pic,sizeof(AVFrame));
bkf->extended_data = pic->extended_data;
bkf->linesize[0] = pic->linesize[0];
memcpy(bkf->data, pic->data, sizeof(pic->data));
bkf->reordered_opaque = pic->reordered_opaque;
bkf->sample_rate = pic->sample_rate;
bkf->channel_layout = pic->channel_layout;
bkf->pkt_pts = pic->pkt_pts;
bkf->pkt_pos = pic->pkt_pos;
bkf->width = pic->width;
bkf->format = pic ->format;
将 pic 复制到 bkf 。但跑步后,我看到很多失真。任何想法如何从解码的框架中做出正确的复制?
to copy pic to bkf. But after running, I saw a lot of distortion. any idea how to make a correct copy from a decoded frame?
推荐答案
使用 av_frame_copy (bkf,pic)* bkf = av_frame_alloc ()。
Use av_frame_copy(bkf, pic) after allocating bkf with AVFrame *bkf = av_frame_alloc().
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