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ffmpeg 实现音视频倍速播放
需求是使用ffmpeg实现格式转换,转换过程中可以控制倍速播放,在网上搜索了一般是使用libavfilter实现倍速播放,但是这里面的接口比如av_buffersrc_add_frame、av_buffersink_get_frame等都是需要解码获取到AVFrame的,而格式转换一般是不需要解码的,使用AVPacket就可以了 ...
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